Develop Reference

Custom checkBox problem in Visual Studio 2019 using C#

I found on the internet how to create your own checkbox. Unfortunately, there is a problem with the fact that you have to click very slowly to react to a change, and when I click on the text, nothing changes. I presented the whole action in the film. Please help.
https://www.youtube.com/watch?v=s6xmVAoUVJ8
Here are the files: https://drive.google.com/file/d/10pj6DRjCvfQc8_s0rUufJpN1kdft2sml/view?usp=sharing
CheckBox.cs:
class NowyCheckbox : Control
{
#region Private members
public bool IsChecked = false;
private Label CheckBoxLabel;
private Rectangle CheckBoxRectangle;
private bool MouseOver = false;
#endregion
#region Public Members (in Attributes)
private Color CheckBoxCharColorValue = Color.FromArgb(0, 0, 0);
public Color CheckBoxCharColor
{
get
{
return CheckBoxCharColorValue;
}
set
{
if (CheckBoxCharColor != value)
{
CheckBoxCharColorValue = value;
Invalidate();
}
}
}
private Color CheckBoxCharHighlightColorValue = Color.FromArgb(0, 120, 215);
public Color CheckBoxCharHighlightColor
{
get
{
return CheckBoxCharHighlightColorValue;
}
set
{
if (CheckBoxCharHighlightColor != value)
{
CheckBoxCharHighlightColorValue = value;
Invalidate();
}
}
}
private Font CheckBoxCharFontValue;
public Font CheckBoxCharFont
{
get
{
return CheckBoxCharFontValue;
}
set
{
if (CheckBoxCharFont != value)
{
CheckBoxCharFontValue = value;
Invalidate();
}
}
}
private string CheckBoxCharValue = "!";
public string CheckBoxChar
{
get
{
return CheckBoxCharValue;
}
set
{
if (CheckBoxChar != value)
{
CheckBoxCharValue = value;
RefreshLabel();
}
}
}
private Font CheckBoxFontValue;
public Font CheckBoxFont
{
get
{
return CheckBoxFontValue;
}
set
{
if (CheckBoxFont != value)
{
CheckBoxFontValue = value;
RefreshLabel();
}
}
}
private string CheckBoxTextValue = "Nowy CheckBox";
public string CheckBoxText
{
get
{
return CheckBoxTextValue;
}
set
{
if (CheckBoxText != value)
{
CheckBoxTextValue = value;
RefreshLabel();
}
}
}
private int CheckBoxSizeValue = 12;
public int CheckBoxSize
{
get
{
return CheckBoxSizeValue;
}
set
{
if (CheckBoxSize != value)
{
CheckBoxSizeValue = value;
RefreshLabel();
Invalidate();
}
}
}
private int CheckBoxFrameStrengthValue = 1;
public int CheckBoxFrameStrength
{
get
{
return CheckBoxFrameStrengthValue;
}
set
{
if (CheckBoxFrameStrengthValue != value)
{
CheckBoxFrameStrengthValue = value;
Invalidate();
}
}
}
#region Public Member
private int CheckBoxCharOffsetXValue = 0;
public int CheckBoxCharOffsetX
{
get
{
return CheckBoxCharOffsetXValue;
}
set
{
if (CheckBoxCharOffsetX != value)
{
CheckBoxCharOffsetXValue = value;
Invalidate();
}
}
}
private int CheckBoxCharOffsetYValue = 0;
public int CheckBoxCharOffsetY
{
get
{
return CheckBoxCharOffsetYValue;
}
set
{
if (CheckBoxCharOffsetY != value)
{
CheckBoxCharOffsetYValue = value;
Invalidate();
}
}
}
private int CheckBoxOffsetXValue = 0;
public int CheckBoxOffsetX
{
get
{
return CheckBoxOffsetXValue;
}
set
{
if (CheckBoxOffsetX != value)
{
CheckBoxOffsetXValue = value;
RefreshLabel();
}
}
}
private int CheckBoxOffsetYValue = 0;
public int CheckBoxOffsetY
{
get
{
return CheckBoxOffsetYValue;
}
set
{
if (CheckBoxOffsetY != value)
{
CheckBoxOffsetYValue = value;
RefreshLabel();
}
}
}
#endregion
#region Public Colors
private Color CheckBoxFrameColorValue = Color.FromArgb(0, 0, 0);
public Color CheckBoxFrameColor
{
get
{
return CheckBoxFrameColorValue;
}
set
{
if (CheckBoxFrameColorValue != value)
{
CheckBoxFrameColorValue = value;
Invalidate();
}
}
}
private Color CheckBoxFrameHighlightColorValue = Color.FromArgb(0, 120, 250);
public Color CheckBoxFrameHighlightColor
{
get
{
return CheckBoxFrameHighlightColorValue;
}
set
{
if (CheckBoxFrameHighlightColorValue != value)
{
CheckBoxFrameHighlightColorValue = value;
Invalidate();
}
}
}
private Color CheckBoxBackColorValue = Color.FromArgb(255, 255, 255);
public Color CheckBoxBackColor
{
get
{
return CheckBoxBackColorValue;
}
set
{
if (CheckBoxBackColorValue != value)
{
CheckBoxBackColorValue = value;
Invalidate();
}
}
}
private Color CheckBoxBackHighlightColorValue = Color.FromArgb(255, 255, 255);
public Color CheckBoxBackHighlightColor
{
get
{
return CheckBoxBackHighlightColorValue;
}
set
{
if (CheckBoxBackHighlightColorValue != value)
{
CheckBoxBackHighlightColorValue = value;
Invalidate();
}
}
}
private Color CheckBoxForeHighlightColorValue = Color.FromArgb(0, 0, 0);
public Color CheckBoxForeHighlightColor
{
get
{
return CheckBoxForeHighlightColorValue;
}
set
{
if (CheckBoxForeHighlightColorValue != value)
{
CheckBoxForeHighlightColorValue = value;
RefreshLabel();
}
}
}
private Color CheckBoxForeColorValue = Color.FromArgb(0, 0, 0);
public Color CheckBoxForeColor
{
get
{
return CheckBoxForeColorValue;
}
set
{
if (CheckBoxForeColorValue != value)
{
CheckBoxForeColorValue = value;
RefreshLabel();
}
}
}
#endregion
#endregion
#region Constructor
public NowyCheckbox()
{
DoubleBuffered = true;
Size = new Size(112, 18);
CheckBoxFont = this.Font;
CheckBoxCharFont = this.Font;
var midHeight = 8 - Font.Height / 2;
CheckBoxLabel = new Label()
{
Font = CheckBoxFont,
Size = new Size(this.Width - 16, this.Height),
Location = new Point(16, midHeight),
Text = CheckBoxText
};
Controls.Add(CheckBoxLabel);
CreateMouseEvents();
}
#endregion
#region Create mouse events
private void CreateMouseEvents()
{
MouseEnter += (sender, e) =>
{
OnCustomMouseEnter(e);
};
MouseLeave += (sender, e) =>
{
OnCustomMouseLeave(e);
};
MouseDown += (sender, e) =>
{
OnCustomMouseDown(e);
};
CheckBoxLabel.MouseEnter += (sender, e) =>
{
OnCustomMouseEnter(e);
};
CheckBoxLabel.MouseLeave += (sender, e) =>
{
OnCustomMouseLeave(e);
};
CheckBoxLabel.MouseDown += (sender, e) =>
{
OnCustomMouseDown(e);
};
}
#endregion
#region Mouse Events
private void OnCustomMouseDown(EventArgs e)
{
IsChecked = !IsChecked;
Invalidate();
}
private void OnCustomMouseEnter(EventArgs e)
{
if (MouseOver == false)
{
MouseOver = true;
Invalidate();
RefreshLabel();
}
}
private void OnCustomMouseLeave(EventArgs e)
{
if (MouseOver == true)
{
MouseOver = false;
Invalidate();
RefreshLabel();
}
}
#endregion
#region Paint NowyCheckbox
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
PaintRectangle(e);
if (IsChecked == true)
{
PaintArrowChar(e);
}
}
#endregion
#region Paint NowyCheckboxRectangle
private void PaintRectangle(PaintEventArgs e)
{
var midHeight = Height / 2 - CheckBoxSize / 2;
CheckBoxRectangle = new Rectangle(0, midHeight, CheckBoxSize, CheckBoxSize);
var fillColor = MouseOver == true ? CheckBoxBackHighlightColor : CheckBoxBackColor;
var frameColor = MouseOver == true ? CheckBoxFrameHighlightColor : CheckBoxFrameColor;
using (var pen = new Pen(frameColor, CheckBoxFrameStrength))
{
var brush = new SolidBrush(fillColor);
e.Graphics.FillRectangle(brush, CheckBoxRectangle);
e.Graphics.DrawRectangle(pen, CheckBoxRectangle);
}
}
#endregion
#region Paint Checkbox Arrow
private void PaintArrowChar(PaintEventArgs e)
{
var charColor = MouseOver == true ? CheckBoxCharHighlightColor : CheckBoxCharColor;
var midX = CheckBoxSize / 2 - 3 + CheckBoxCharOffsetX;
var midY = Height / 2 - CheckBoxCharFont.Height / 2 + CheckBoxCharOffsetY;
using (var brush = new SolidBrush(charColor))
{
e.Graphics.DrawString(CheckBoxChar, CheckBoxCharFont, brush, new Point(midX, midY));
}
}
#endregion
#region [OnResize]
protected override void OnResize(EventArgs e)
{
base.OnResize(e);
RefreshLabel();
}
#endregion
#region Refresh Label
private void RefreshLabel()
{
if (CheckBoxLabel == null) return;
CheckBoxLabel.Font = CheckBoxFont;
CheckBoxLabel.Text = CheckBoxText;
CheckBoxLabel.ForeColor = MouseOver == true ? CheckBoxForeHighlightColor : CheckBoxForeColor;
var offsetWidth = Width - CheckBoxSize;
CheckBoxLabel.Size = new Size(offsetWidth, Height);
var offsetX = CheckBoxSize + 6 + CheckBoxOffsetX;
var midHeight = Height / 2 - CheckBoxFont.Height / 2 + CheckBoxOffsetY;
CheckBoxLabel.Location = new Point(offsetX, midHeight);
Invalidate();
}
#endregion
}
}
Form1.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void nowyCheckbox1_Click(object sender, EventArgs e)
{
if (nowyCheckbox1.IsChecked)
{
label2.Text = "Jestem włączony";
}
else
{
label2.Text = "Jestem wyłączony";
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
label3.Text = "Jestem włączony";
}
else
{
label3.Text = "Jestem wyłączony";
}
}
}

An object like your custom check box, should have a mechanism used to notify a subscriber (like a Form) that something has happened. Notifications like mouse clicks, keystrokes, property changes...etc. In event-driven programming, your control should generate and publish an event to be received and handled by a subscriber through an Event Handler. Your custom control is missing that mechanism and this is the problem.
Let's apply that and create a simple check box control.
[DefaultProperty("Checked")]
[DefaultEvent("CheckedChanged")]
[DesignerCategory("Code")]
[ToolboxBitmap(typeof(CheckBox))]
public class NowyCheckBox : Control
{
Class members to keep:
The bounds of the check box and text areas.
The points of a check mark.
The current mouse state.
private enum MouseState : int
{
None,
Over,
Down
}
private Rectangle ChkRec, TxtRec;
private PointF[] ChkPoints;
private MouseState mouseState = MouseState.None;
In the constructor, set the shown below styles to reduce the flickering and to use the control in a container with a background image or gradient colors.
public NowyCheckBox() : base()
{
SetStyle(
ControlStyles.SupportsTransparentBackColor |
ControlStyles.OptimizedDoubleBuffer |
ControlStyles.ResizeRedraw, true);
UpdateStyles();
}
Add a method to create the drawing objects. Call it from the setters of the relevant properties
(such as CheckBoxSize) and methods (like OnSizeChanged) as shown next.
private void ResetDrawingObjects()
{
if (Width == 0 || Height == 0) return;
ChkRec = new Rectangle(new Point(0, (Height - checkBoxSize.Height) / 2), CheckBoxSize);
TxtRec = new Rectangle(ChkRec.Right + 5, 0, Width - ChkRec.Right - 10, Height);
if (this.RightToLeft == RightToLeft.Yes)
{
ChkRec.X = Width - 1 - ChkRec.Width;
TxtRec.X = ChkRec.X - 5 - TxtRec.Width;
}
var r = Rectangle.Inflate(ChkRec, -3, -3);
ChkPoints = new[]
{
new PointF(r.X, r.Y + (r.Height / 2f)),
new PointF(r.X + (r.Width / 2f) - 1, r.Bottom),
new PointF(r.Right, r.Y)
};
Invalidate();
}
Create a custom event and raise it whenever the Checked property changes.
public event EventHandler CheckedChanged;
protected virtual void OnCheckedChanged(EventArgs e) => CheckedChanged?.Invoke(this, e);
Add the properties.
private bool _checked;
[DefaultValue(false)]
public bool Checked
{
get => _checked;
set
{
if (_checked != value)
{
_checked = value;
Invalidate();
OnCheckedChanged(new EventArgs());
}
}
}
private Size checkBoxSize = new Size(12, 12);
[DefaultValue(typeof(Size), "12, 12")]
public Size CheckBoxSize
{
get => checkBoxSize;
set { checkBoxSize = value; ResetDrawingObjects(); }
}
// Add the rest...
Override the following methods to:
Update the mouseState variable and refresh the drawing by calling the Invalidate method if needed.
Call the ResetDrawingObjects method whenever the drawing objects need to resize and/or reposition.
Like the default CheckBox control, toggle the Checked property on Keys.Space press.
Draw the control.
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (mouseState != MouseState.Over)
{
mouseState = MouseState.Over;
// Pass ChkRec to update the checkbox area only.
Invalidate(ChkRec);
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if (e.Button == MouseButtons.Left)
{
Focus();
mouseState = MouseState.Down;
Invalidate(ChkRec);
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
Checked = !Checked;
mouseState = MouseState.Over;
Invalidate(ChkRec);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
mouseState = MouseState.None;
Invalidate(ChkRec);
}
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (e.KeyCode == Keys.Space) Checked = !Checked;
}
protected override void OnTextChanged(EventArgs e)
{
base.OnTextChanged(e);
Invalidate();
}
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
ResetDrawingObjects();
}
protected override void OnRightToLeftChanged(EventArgs e)
{
base.OnRightToLeftChanged(e);
ResetDrawingObjects();
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
// Get your colors to fill and draw...
var clr = mouseState == MouseState.Down
? // down color...
: mouseState == MouseState.Over
? // over color...
: // default color...;
using (var pn = new Pen(clr)) g.DrawRectangle(pn, ChkRec);
if (Checked)
{
clr = mouseState == MouseState.Down
? // down color...
: mouseState == MouseState.Over
? // over color...
: // default color...;
using (var pn = new Pen(clr, 2))
{
g.SmoothingMode = SmoothingMode.AntiAlias;
g.DrawLines(pn, ChkPoints);
g.SmoothingMode = SmoothingMode.None;
}
/*
* In case you prefere drawing glyphs. Example:
using (var fnt = new Font("Marlett", 12))
{
var r = ChkRec;
r.Offset(2, -2);
TextRenderer.DrawText(g, "a", fnt, r, clr,
TextFormatFlags.HorizontalCenter |
TextFormatFlags.VerticalCenter);
}
*/
}
var flags = TextFormatFlags.VerticalCenter | TextFormatFlags.EndEllipsis;
if (this.RightToLeft == RightToLeft.Yes)
flags |= TextFormatFlags.Right;
else
flags |= TextFormatFlags.Left;
TextRenderer.DrawText(g, Text, Font, TxtRec, ForeColor, flags);
}
}
Put it together, rebuild, drop an instance, double click on it to subscribe to the default event CheckedChanged, and handle it as you want.
private void nowyCheckBox1_CheckedChanged(object sender, EventArgs e)
{
label2.Text = nowyCheckBox1.Checked
? "Jestem włączony"
: "Jestem wyłączony";
}
If you'd like to read more.
Handle and raise events
C# - Events

how to update custom control properties at design time immediately?

I created a custom Control which inherits from: Panel Control (using C# Class Library) then I used it inside a Form.
When I select any of the Control Properties (during design time), my custom control won’t update !
However if I close the Form and i reopen it; the changes will take place !
I want to have the Control updated when any of the Properties are changed.
Please find bellow my custom control code:
public class PersoCont : Panel
{
private int borderSize = 2;
private Color borderColor = Color.DarkRed;
private bool isBorder = true;
private int paddingTopTitle = 0;
private int paddingBorder = 0;
public int padding_TopTitle
{
get { return paddingTopTitle; }
set { paddingTopTitle = value; Invalidate(); }
}
public int padding_border
{
get { return paddingBorder; }
set { paddingBorder = value; Invalidate(); }
}
public int border_size
{
get { return borderSize; }
set { borderSize = value; Invalidate(); }
}
public Color border_color
{
get { return borderColor; }
set { borderColor = value; Invalidate(); }
}
public bool is_border
{
get { return isBorder; }
set { isBorder = value; Invalidate(); }
}
public PersoCont()
{
}
protected override void OnHandleCreated(EventArgs e)
{
if (this.Controls.Find("xlblTitle", true).Length == 0)
{
if (isBorder == true)
{
Label lblUp = new Label();
lblUp.Text = "";
lblUp.AutoSize = false;
lblUp.BackColor = borderColor;
int lblUpWidth = this.Width - (2 * paddingBorder) - (2 * borderSize);
lblUp.Size = new Size(lblUpWidth, borderSize);
lblUp.Location = new Point(borderSize + paddingBorder, paddingBorder);
lblUp.Anchor = AnchorStyles.Left | AnchorStyles.Top | AnchorStyles.Right;
Label lblDown = new Label();
lblDown.Text = "";
lblDown.AutoSize = false;
lblDown.BackColor = borderColor;
lblDown.Size = new Size(lblUpWidth, borderSize);
int lblDownTop = this.Height - paddingBorder - borderSize;
lblDown.Location = new Point(borderSize + paddingBorder, lblDownTop);
lblDown.Anchor = AnchorStyles.Left | AnchorStyles.Bottom | AnchorStyles.Right;
Label lblLeft = new Label();
lblLeft.Text = "";
lblLeft.AutoSize = false;
lblLeft.BackColor = borderColor;
int lblLeftHeight = this.Height - (2 * paddingBorder);
lblLeft.Size =new Size(borderSize,lblLeftHeight);
lblLeft.Location = new Point(paddingBorder, paddingBorder);
lblLeft.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Bottom;
Label lblRight = new Label();
lblRight.Text = "";
lblRight.AutoSize = false;
lblRight.BackColor = borderColor;
lblRight.Size = new Size(borderSize, lblLeftHeight);
int lblRightLeft = this.Width - paddingBorder - borderSize;
lblRight.Location = new Point(lblRightLeft, paddingBorder);
lblRight.Anchor = AnchorStyles.Top | AnchorStyles.Right | AnchorStyles.Bottom;
this.Controls.Add(lblUp);
this.Controls.Add(lblDown);
this.Controls.Add(lblLeft);
this.Controls.Add(lblRight);
}
}
base.OnHandleCreated(e);
}
}

Use Refresh instead of Invalidate which only signals to the system that a repaint is needed, but won't actually do it: it will be a call to Refresh which will repaint it.
https://learn.microsoft.com/dotnet/api/system.windows.forms.control.refresh
https://learn.microsoft.com/dotnet/api/system.windows.forms.control.update
You may test if the internal value has changed, before calling Refresh to do it (only if necessary):
public int padding_TopTitle
{
get
{
return paddingTopTitle;
}
set
{
if ( paddingTopTitle != value )
{
paddingTopTitle = value;
Refresh();
}
}
}
You may consider using Framework Design Guidelines and C# Naming Conventions.
For example:
public int PaddingTopTitle
{
get
{
return paddingTopTitle;
}
set
{
if ( paddingTopTitle != value )
{
paddingTopTitle = value;
Refresh();
}
}
}
Or:
public int PaddingTopTitle
{
get
{
return _PaddingTopTitle;
}
set
{
if ( _PaddingTopTitle != value )
{
_PaddingTopTitle = value;
Refresh();
}
}
}
I personally prefer _PaddingTopTitle (or _paddingTopTitle) for private field of a property because paddingTopTitle is used for a method parameter as well as local var.
Therefore you may have for example : BorderSize and _BorderSize (or _borderSize).

Thank you for your help.
Initially I used the OnPaint event, but I really didn't like it because it would fire many times (I don't know why).
My problem was solved as follows:
I created a simple private method that will repaint (refresh the graphics data) according to all my properties. Now everything is working fine.
public class PersoCont2 : Panel
{
Label lblUp = null;
bool isBorder;
Color borderColor;
public bool is_border
{
get { return isBorder; }
set { isBorder = value; Rearrange( ); }
}
public Color border_color
{
get { return borderColor; }
set { borderColor = value; Rearrange( ); }
}
protected override void OnHandleCreated(EventArgs e)
{
Rearrange();
}
private void Rearrange( )
{
if( lblUp != null )
{
Controls.Remove( lblUp );
lblUp = null;
}
if( is_border )
{
lblUp = new Label( );
lblUp.BackColor = borderColor;
// TODO: set properties
// . . .
lblUp.Location = new Point( 10, 10 );
Controls.Add( lblUp );
}
}
}

You can try the following code to rewrite panel control and get what you want.
public class MyPanel : Panel
{
private Color colorBorder = Color.Transparent;
public MyPanel()
: base()
{
this.SetStyle(ControlStyles.UserPaint, true);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.DrawRectangle(
new Pen(
new SolidBrush(colorBorder), 6),
e.ClipRectangle);
}
public Color BorderColor
{
get
{
return colorBorder;
}
set
{
colorBorder = value;
}
}
}
Result:
This behaviour however is a little bit awkward because it will only repaint after clicking the form designer.

How can I combine marquee scrolling and transparency into a label control

I have found the following two label controls that separately handle marquee scrolling of text in a label, and also for the label to be partly transparent. They work very well separately, but I'm having trouble combining them into one control given my limited C#.
Can anyone give me some clues?
Transparent label:
public class LabelTransparent : Label
{
private int opacity;
public Color clrTransparentColor;
public LabelTransparent()
{
this.clrTransparentColor = Color.Blue;
this.opacity = 50;
this.BackColor = Color.Transparent;
}
protected override void OnPaint(PaintEventArgs e)
{
if (Parent != null)
{
using (var bmp = new Bitmap(Parent.Width, Parent.Height))
{
Parent.Controls.Cast<Control>()
.Where(c => Parent.Controls.GetChildIndex(c) > Parent.Controls.GetChildIndex(this))
.Where(c => c.Bounds.IntersectsWith(this.Bounds))
.OrderByDescending(c => Parent.Controls.GetChildIndex(c))
.ToList()
.ForEach(c => c.DrawToBitmap(bmp, c.Bounds));
e.Graphics.DrawImage(bmp, -Left, -Top);
using (var b = new SolidBrush(Color.FromArgb(this.Opacity, this.TransparentBackColor)))
{
e.Graphics.FillRectangle(b, this.ClientRectangle);
}
e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
TextRenderer.DrawText(e.Graphics, this.Text, this.Font, this.ClientRectangle, this.ForeColor, Color.Transparent);
}
}
}
public int Opacity
{
get { return opacity; }
set { if (value >= 0 && value <= 255) opacity = value; this.Invalidate(); }
}
public Color TransparentBackColor
{
get { return clrTransparentColor; }
set { clrTransparentColor = value; this.Invalidate(); }
}
[Browsable(false)]
public override Color BackColor
{
get { return Color.Transparent; }
set { base.BackColor = Color.Transparent; }
}
}
Marquee scrolling:
public class LabelMarquee : Label
{
private int CurrentPosition { get; set; }
private Timer Timer = new Timer();
private Graphics grText;
private float fTextPixels;
public int ScrollSpeed
{
get { return this.Timer.Interval; }
set { try { this.Timer.Interval = value; } catch (Exception) { this.Timer.Interval = 15; } }
}
public LabelMarquee()
{
UseCompatibleTextRendering = true;
grText = this.CreateGraphics();
Timer.Tick += new EventHandler(Timer_Tick);
Timer.Start();
}
void Timer_Tick(object sender, EventArgs e)
{
fTextPixels = grText.MeasureString(this.Text, this.Font).Width;
if (CurrentPosition < -this.fTextPixels) CurrentPosition = Width;
else CurrentPosition -= 1;
Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.TranslateTransform((float)CurrentPosition, 0);
base.OnPaint(e);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (Timer != null)
Timer.Dispose();
}
Timer = null;
}
}

Show percentage or some text in ProgressBar [duplicate]

I have used ProgressBar Control in my c# desktop application.I have used it in a thread other then the thread in which control has been declared.Its working Fine.
Now I am wondering how i can show some text inside progress bar control like "Initiating Registration" etc.Also I want to use it as Marquee progress bar.Please help me.

You will have to override the OnPaint method, call the base implementation and the paint your own text.
You will need to create your own CustomProgressBar and then override OnPaint to draw what ever text you want.
Custom Progress Bar Class
namespace ProgressBarSample
{
public enum ProgressBarDisplayText
{
Percentage,
CustomText
}
class CustomProgressBar: ProgressBar
{
//Property to set to decide whether to print a % or Text
public ProgressBarDisplayText DisplayStyle { get; set; }
//Property to hold the custom text
public String CustomText { get; set; }
public CustomProgressBar()
{
// Modify the ControlStyles flags
//http://msdn.microsoft.com/en-us/library/system.windows.forms.controlstyles.aspx
SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.OptimizedDoubleBuffer, true);
}
protected override void OnPaint(PaintEventArgs e)
{
Rectangle rect = ClientRectangle;
Graphics g = e.Graphics;
ProgressBarRenderer.DrawHorizontalBar(g, rect);
rect.Inflate(-3, -3);
if (Value > 0)
{
// As we doing this ourselves we need to draw the chunks on the progress bar
Rectangle clip = new Rectangle(rect.X, rect.Y, (int)Math.Round(((float)Value / Maximum) * rect.Width), rect.Height);
ProgressBarRenderer.DrawHorizontalChunks(g, clip);
}
// Set the Display text (Either a % amount or our custom text
int percent = (int)(((double)this.Value / (double)this.Maximum) * 100);
string text = DisplayStyle == ProgressBarDisplayText.Percentage ? percent.ToString() + '%' : CustomText;
using (Font f = new Font(FontFamily.GenericSerif, 10))
{
SizeF len = g.MeasureString(text, f);
// Calculate the location of the text (the middle of progress bar)
// Point location = new Point(Convert.ToInt32((rect.Width / 2) - (len.Width / 2)), Convert.ToInt32((rect.Height / 2) - (len.Height / 2)));
Point location = new Point(Convert.ToInt32((Width / 2) - len.Width / 2), Convert.ToInt32((Height / 2) - len.Height / 2));
// The commented-out code will centre the text into the highlighted area only. This will centre the text regardless of the highlighted area.
// Draw the custom text
g.DrawString(text, f, Brushes.Red, location);
}
}
}
}
Sample WinForms Application
using System;
using System.Linq;
using System.Windows.Forms;
using System.Collections.Generic;
namespace ProgressBarSample
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// Set our custom Style (% or text)
customProgressBar1.DisplayStyle = ProgressBarDisplayText.CustomText;
customProgressBar1.CustomText = "Initialising";
}
private void btnReset_Click(object sender, EventArgs e)
{
customProgressBar1.Value = 0;
btnStart.Enabled = true;
}
private void btnStart_Click(object sender, EventArgs e)
{
btnReset.Enabled = false;
btnStart.Enabled = false;
for (int i = 0; i < 101; i++)
{
customProgressBar1.Value = i;
// Demo purposes only
System.Threading.Thread.Sleep(100);
// Set the custom text at different intervals for demo purposes
if (i > 30 && i < 50)
{
customProgressBar1.CustomText = "Registering Account";
}
if (i > 80)
{
customProgressBar1.CustomText = "Processing almost complete!";
}
if (i >= 99)
{
customProgressBar1.CustomText = "Complete";
}
}
btnReset.Enabled = true;
}
}
}

I have written a no blinking/flickering TextProgressBar
You can find the source code here: https://github.com/ukushu/TextProgressBar
WARNING: It's a little bit buggy! But still, I think it's better than another answers here. As I have no time for fixes, if you will do sth with them, please send me update by some way:) Thanks.
Samples:

AVOID FLICKERING TEXT
The solution provided by Barry above is excellent, but there's is the "flicker-problem".
As soon as the Value is above zero the OnPaint will be envoked repeatedly and the text will flicker.
There is a solution to this. We do not need VisualStyles for the object since we will be drawing it with our own code.
Add the following code to the custom object Barry wrote and you will avoid the flicker:
[DllImportAttribute("uxtheme.dll")]
private static extern int SetWindowTheme(IntPtr hWnd, string appname, string idlist);
protected override void OnHandleCreated(EventArgs e)
{
SetWindowTheme(this.Handle, "", "");
base.OnHandleCreated(e);
}
I did not write this myself. It found it here: https://stackoverflow.com/a/299983/1163954
I've testet it and it works.

I wold create a control named for example InfoProgresBar, that provide this functionality with a label or two (Main Job, Current Job) and ProgressBar and use it instead of that ProgressBar.

I have used this simple code, and it works!
for (int i = 0; i < N * N; i++)
{
Thread.Sleep(50);
progressBar1.BeginInvoke(new Action(() => progressBar1.Value = i));
progressBar1.CreateGraphics().DrawString(i.ToString() + "%", new Font("Arial",
(float)10.25, FontStyle.Bold),
Brushes.Red, new PointF(progressBar1.Width / 2 - 10, progressBar1.Height / 2 - 7));
}
It just has one simple problem and this is it: when progress bar start to rising, percentage some times hide, and then appear again.
I did't write it myself.I found it here:
text on progressbar in c#
I used this code, and it does work.

I tried placing a label with transparent background over a progress bar but never got it to work properly. So I found Barry's solution here very useful, although I missed the beautiful Vista style progress bar. So I merged Barry's solution with http://www.dreamincode.net/forums/topic/243621-percent-into-progress-bar/ and managed to keep the native progress bar, while displaying text percentage or custom text over it. I don't see any flickering in this solution either. Sorry to dig up and old thread but I needed this today and so others may need it too.
public enum ProgressBarDisplayText
{
Percentage,
CustomText
}
class ProgressBarWithCaption : ProgressBar
{
//Property to set to decide whether to print a % or Text
private ProgressBarDisplayText m_DisplayStyle;
public ProgressBarDisplayText DisplayStyle {
get { return m_DisplayStyle; }
set { m_DisplayStyle = value; }
}
//Property to hold the custom text
private string m_CustomText;
public string CustomText {
get { return m_CustomText; }
set {
m_CustomText = value;
this.Invalidate();
}
}
private const int WM_PAINT = 0x000F;
protected override void WndProc(ref Message m)
{
base.WndProc(m);
switch (m.Msg) {
case WM_PAINT:
int m_Percent = Convert.ToInt32((Convert.ToDouble(Value) / Convert.ToDouble(Maximum)) * 100);
dynamic flags = TextFormatFlags.VerticalCenter | TextFormatFlags.HorizontalCenter | TextFormatFlags.SingleLine | TextFormatFlags.WordEllipsis;
using (Graphics g = Graphics.FromHwnd(Handle)) {
using (Brush textBrush = new SolidBrush(ForeColor)) {
switch (DisplayStyle) {
case ProgressBarDisplayText.CustomText:
TextRenderer.DrawText(g, CustomText, new Font("Arial", Convert.ToSingle(8.25), FontStyle.Regular), new Rectangle(0, 0, this.Width, this.Height), Color.Black, flags);
break;
case ProgressBarDisplayText.Percentage:
TextRenderer.DrawText(g, string.Format("{0}%", m_Percent), new Font("Arial", Convert.ToSingle(8.25), FontStyle.Regular), new Rectangle(0, 0, this.Width, this.Height), Color.Black, flags);
break;
}
}
}
break;
}
}
}

Just want to point out something on #codingbadger answer. When using "ProgressBarRenderer" you should always check for "ProgressBarRenderer.IsSupported" before using the class. For me, this has been a nightmare with Visual Styles errors in Win7 that I couldn't fix. So, a better approach and workaround for the solution would be:
Rectangle clip = new Rectangle(rect.X, rect.Y, (int)Math.Round(((float)Value / Maximum) * rect.Width), rect.Height);
if (ProgressBarRenderer.IsSupported)
ProgressBarRenderer.DrawHorizontalChunks(g, clip);
else
g.FillRectangle(new SolidBrush(this.ForeColor), clip);
Notice that the fill will be a simple rectangle and not chunks. Chunks will be used only if ProgressBarRenderer is supported

I have created a InfoProgressBar control which uses a TransparentLabel control. Testing on a form with a Timer, I get some slight glitches displaying the text every 30-40 value changes if using a timer interval of less than 250 milliseconds (probably because of the time required to update the screen is greater than the timer interval).
It would be possible to modify UpdateText method to insert all the calculated values into CustomText but it isn't something that I have needed yet. This would remove the need for the DisplayType property and enumerate.
The TransparentLabel class was created by adding a new UserControl and changing it to inheriting from Label with the following implementation:
using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
namespace Utils.GUI
{
public partial class TransparentLabel : Label
{
// hide the BackColor attribute as much as possible.
// setting the base value has no effect as drawing the
// background is disabled
[Browsable(false)]
[EditorBrowsable(EditorBrowsableState.Never)]
public override Color BackColor
{
get
{
return Color.Transparent;
}
set
{
}
}
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x20; // WS_EX_TRANSPARENT
return cp;
}
}
public override string Text
{
get
{
return base.Text;
}
set
{
base.Text = value;
if(Parent != null) Parent.Invalidate(Bounds, false);
}
}
public override ContentAlignment TextAlign
{
get
{
return base.TextAlign;
}
set
{
base.TextAlign = value;
if(Parent != null) Parent.Invalidate(Bounds, false);
}
}
public TransparentLabel()
{
InitializeComponent();
SetStyle(ControlStyles.Opaque, true);
SetStyle(ControlStyles.OptimizedDoubleBuffer, false);
base.BackColor = Color.Transparent;
}
protected override void OnMove(EventArgs e)
{
base.OnMove(e);
RecreateHandle();
}
protected override void OnPaintBackground(PaintEventArgs pevent)
{
// do nothing
}
}
}
I did not make any changes to the related designer code but here it is for completeness.
namespace Utils.GUI
{
partial class TransparentLabel
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if(disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
components = new System.ComponentModel.Container();
}
#endregion
}
}
I then created another new UserControl and changed it to derive from ProgressBar with the following implementation:
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Windows.Forms.Design.Behavior;
namespace Utils.GUI
{
[Designer(typeof(InfoProgressBarDesigner))]
public partial class InfoProgressBar : ProgressBar
{
// designer class to add font baseline snapline by copying it from the label
private class InfoProgressBarDesigner : ControlDesigner
{
public override IList SnapLines
{
get
{
IList snapLines = base.SnapLines;
InfoProgressBar control = Control as InfoProgressBar;
if(control != null)
{
using(IDesigner designer = TypeDescriptor.CreateDesigner(control.lblText, typeof(IDesigner)))
{
if(designer != null)
{
designer.Initialize(control.lblText);
ControlDesigner boxDesigner = designer as ControlDesigner;
if(boxDesigner != null)
{
foreach(SnapLine line in boxDesigner.SnapLines)
{
if(line.SnapLineType == SnapLineType.Baseline)
{
snapLines.Add(new SnapLine(SnapLineType.Baseline, line.Offset, line.Filter, line.Priority));
break;
}
}
}
}
}
}
return snapLines;
}
}
}
// enum to select the type of displayed value
public enum ProgressBarDisplayType
{
Custom = 0,
Percent = 1,
Progress = 2,
Remain = 3,
Value = 4,
}
private string _customText;
private ProgressBarDisplayType _displayType;
private int _range;
[Bindable(false)]
[Browsable(true)]
[DefaultValue("{0}")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
// {0} is replaced with the result of the selected calculation
public string CustomText
{
get
{
return _customText;
}
set
{
_customText = value;
UpdateText();
}
}
[Bindable(false)]
[Browsable(true)]
[DefaultValue(ProgressBarDisplayType.Percent)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
public ProgressBarDisplayType DisplayType
{
get
{
return _displayType;
}
set
{
_displayType = value;
UpdateText();
}
}
[Bindable(false)]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
// don't use the lblText font as if it is null, it checks the parent font (i.e. this property) and gives an infinite loop
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
}
}
[Bindable(false)]
[Browsable(true)]
[DefaultValue(100)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
public new int Maximum
{
get
{
return base.Maximum;
}
set
{
base.Maximum = value;
_range = base.Maximum - base.Minimum;
UpdateText();
}
}
[Bindable(false)]
[Browsable(true)]
[DefaultValue(0)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
public new int Minimum
{
get
{
return base.Minimum;
}
set
{
base.Minimum = value;
_range = base.Maximum - base.Minimum;
UpdateText();
}
}
[Bindable(false)]
[Browsable(true)]
[DefaultValue(ContentAlignment.MiddleLeft)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
public ContentAlignment TextAlign
{
get
{
return lblText.TextAlign;
}
set
{
lblText.TextAlign = value;
}
}
[Bindable(false)]
[Browsable(true)]
[DefaultValue(typeof(Color), "0x000000")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
public Color TextColor
{
get
{
return lblText.ForeColor;
}
set
{
lblText.ForeColor = value;
}
}
[Bindable(false)]
[Browsable(true)]
[DefaultValue(0)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
public new int Value
{
get
{
return base.Value;
}
set
{
base.Value = value;
UpdateText();
}
}
public InfoProgressBar()
{
InitializeComponent();
CustomText = "{0}";
DisplayType = ProgressBarDisplayType.Percent;
Maximum = 100;
Minimum = 0;
TextAlign = ContentAlignment.MiddleLeft;
TextColor = Color.Black;
Value = 0;
// means the label gets drawn in front of the progress bar
lblText.Parent = this;
_range = base.Maximum - base.Minimum;
}
protected void UpdateText()
{
switch(DisplayType)
{
case ProgressBarDisplayType.Custom:
{
lblText.Text = _customText;
break;
}
case ProgressBarDisplayType.Percent:
{
if(_range > 0)
{
lblText.Text = string.Format(_customText, string.Format("{0}%", (int)((Value * 100) / _range)));
}
else
{
lblText.Text = "100%";
}
break;
}
case ProgressBarDisplayType.Progress:
{
lblText.Text = string.Format(_customText, (Value - Minimum));
break;
}
case ProgressBarDisplayType.Remain:
{
lblText.Text = string.Format(_customText, (Maximum - Value));
break;
}
case ProgressBarDisplayType.Value:
{
lblText.Text = string.Format(_customText, Value);
break;
}
}
}
public new void Increment(int value)
{
base.Increment(value);
UpdateText();
}
public new void PerformStep()
{
base.PerformStep();
UpdateText();
}
}
}
And the designer code:
namespace Utils.GUI
{
partial class InfoProgressBar
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if(disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.lblText = new Utils.GUI.TransparentLabel();
this.SuspendLayout();
//
// lblText
//
this.lblText.BackColor = System.Drawing.Color.Transparent;
this.lblText.Dock = System.Windows.Forms.DockStyle.Fill;
this.lblText.Location = new System.Drawing.Point(0, 0);
this.lblText.Name = "lblText";
this.lblText.Padding = new System.Windows.Forms.Padding(3, 0, 3, 0);
this.lblText.Size = new System.Drawing.Size(100, 23);
this.lblText.TabIndex = 0;
this.lblText.Text = "transparentLabel1";
this.ResumeLayout(false);
}
#endregion
private TransparentLabel lblText;
}
}

Alliteratively you can try placing a Label control and placing it on top of the progress bar control. Then you can set whatever the text you want to the label. I haven't done this my self. If it works it should be a simpler solution than overriding onpaint.

RichTextBoxAppender using log4net

Is there a way to programatically create a RichTextBoxAppender using log4net?
In other words no xml app.config?

using System;
using System.Windows.Forms;
using System.Drawing;
using log4net;
using log4net.Core;
using log4net.Appender;
using log4net.Util;
namespace Vip.Logging
{
/// <summary>
/// Description of RichTextBoxAppender.
/// </summary>
public class RichTextBoxAppender : AppenderSkeleton
{
#region Private Instance Fields
private RichTextBox richTextBox = null;
private Form containerForm = null;
private LevelMapping levelMapping = new LevelMapping();
private int maxTextLength = 100000;
#endregion
private delegate void UpdateControlDelegate(LoggingEvent loggingEvent);
#region Constructor
public RichTextBoxAppender(RichTextBox myRichTextBox) : base()
{
richTextBox = myRichTextBox;
containerForm = (Form)richTextBox.Parent;
}
#endregion
private void UpdateControl(LoggingEvent loggingEvent)
{
// There may be performance issues if the buffer gets too long
// So periodically clear the buffer
if (richTextBox.TextLength > maxTextLength)
{
richTextBox.Clear();
richTextBox.AppendText(string.Format("(Cleared log length max: {0})\n", maxTextLength));
}
// look for a style mapping
LevelTextStyle selectedStyle = levelMapping.Lookup(loggingEvent.Level) as LevelTextStyle;
if (selectedStyle != null)
{
// set the colors of the text about to be appended
richTextBox.SelectionBackColor = selectedStyle.BackColor;
richTextBox.SelectionColor = selectedStyle.TextColor;
// alter selection font as much as necessary
// missing settings are replaced by the font settings on the control
if (selectedStyle.Font != null)
{
// set Font Family, size and styles
richTextBox.SelectionFont = selectedStyle.Font;
}
else if (selectedStyle.PointSize > 0 && richTextBox.Font.SizeInPoints != selectedStyle.PointSize)
{
// use control's font family, set size and styles
float size = selectedStyle.PointSize > 0.0f ? selectedStyle.PointSize : richTextBox.Font.SizeInPoints;
richTextBox.SelectionFont = new Font(richTextBox.Font.FontFamily.Name, size, selectedStyle.FontStyle);
}
else if (richTextBox.Font.Style != selectedStyle.FontStyle)
{
// use control's font family and size, set styles
richTextBox.SelectionFont = new Font(richTextBox.Font, selectedStyle.FontStyle);
}
}
richTextBox.AppendText(RenderLoggingEvent(loggingEvent));
}
protected override void Append(LoggingEvent LoggingEvent)
{
if (richTextBox.InvokeRequired)
{
richTextBox.Invoke(
new UpdateControlDelegate(UpdateControl),
new object[] { LoggingEvent });
}
else
{
UpdateControl(LoggingEvent);
}
}
public void AddMapping(LevelTextStyle mapping)
{
levelMapping.Add(mapping);
}
public override void ActivateOptions()
{
base.ActivateOptions();
levelMapping.ActivateOptions();
}
protected override bool RequiresLayout { get { return true; } }
}
public class LevelTextStyle : LevelMappingEntry
{
private Color textColor;
private Color backColor;
private FontStyle fontStyle = FontStyle.Regular;
private float pointSize = 0.0f;
private bool bold = false;
private bool italic = false;
private string fontFamilyName = null;
private Font font = null;
public bool Bold { get { return bold; } set { bold = value; } }
public bool Italic { get { return italic; } set { italic = value; } }
public float PointSize { get { return pointSize; } set { pointSize = value; } }
/// <summary>
/// Initialize the options for the object
/// </summary>
/// <remarks>Parse the properties</remarks>
public override void ActivateOptions()
{
base.ActivateOptions();
if (bold) fontStyle |= FontStyle.Bold;
if (italic) fontStyle |= FontStyle.Italic;
if (fontFamilyName != null)
{
float size = pointSize > 0.0f ? pointSize : 8.25f;
try
{
font = new Font(fontFamilyName, size, fontStyle);
}
catch (Exception)
{
font = new Font("Arial", 8.25f, FontStyle.Regular);
}
}
}
public Color TextColor { get { return textColor; } set { textColor = value; } }
public Color BackColor { get { return backColor; } set { backColor = value; } }
public FontStyle FontStyle { get { return fontStyle; } set { fontStyle = value; } }
public Font Font { get { return font; } set { font = value; } }
}
}
public partial class MainForm : Form
{
private static string locPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
private static string dskPath = Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory);
private RichTextBoxAppender rba;
private MessageBoxAppender mba;
public MainForm()
{
InitializeComponent();
if (!Global.logger.Logger.Repository.Configured)
{
rba = new RichTextBoxAppender(richTextBoxLog);
rba.Threshold = Level.All;
rba.Layout = new PatternLayout("%date{dd-MM-yyyy HH:mm:ss.fff} %5level %message %n");
LevelTextStyle ilts = new LevelTextStyle();
ilts.Level = Level.Info;
ilts.TextColor = Color.Yellow;
ilts.PointSize = 10.0f;
rba.AddMapping(ilts);
LevelTextStyle dlts = new LevelTextStyle();
dlts.Level = Level.Debug;
dlts.TextColor = Color.LightBlue;
dlts.PointSize = 10.0f;
rba.AddMapping(dlts);
LevelTextStyle wlts = new LevelTextStyle();
wlts.Level = Level.Warn;
wlts.TextColor = Color.Chartreuse;
wlts.PointSize = 10.0f;
rba.AddMapping(wlts);
LevelTextStyle elts = new LevelTextStyle();
elts.Level = Level.Error;
elts.TextColor = Color.Crimson;
elts.BackColor = Color.Cornsilk;
elts.PointSize = 10.0f;
rba.AddMapping(elts);
BasicConfigurator.Configure(rba);
rba.ActivateOptions();
mba = new MessageBoxAppender();
mba.Layout = new PatternLayout("%date{dd-MM-yyyy HH:mm:ss.fff} %5level %message %n");
mba.Threshold = Level.Error;
BasicConfigurator.Configure(mba);
mba.ActivateOptions();
RollingFileAppender fa = new RollingFileAppender();
fa.AppendToFile = true;
fa.Threshold = log4net.Core.Level.All;
fa.RollingStyle = RollingFileAppender.RollingMode.Size;
fa.MaxFileSize = 100000;
fa.MaxSizeRollBackups = 3;
fa.File = dskPath + #"\FgPleoraLog.txt";
fa.Layout = new log4net.Layout.PatternLayout("%date{dd-MM-yyyy HH:mm:ss.fff} %5level %message (%logger{1}:%line)%n");
log4net.Config.BasicConfigurator.Configure(fa);
fa.ActivateOptions();
}
}

#GMAN 's answer is correct, but Invoke => BeginInvoke can be thread-safe. you can look my thread Why my log4net is deadlocked?