Develop Reference

Out of memory when chaging font dynamically in C#

I try to list all available fonts in ComboBox, but with font names printed in a given font family. It works, but it also crashes from time to time, with message "Out of memory", when I move mouse over opened ComboBox. Without changing fonts, it doesn't crash. Why the message occurs? And what to do to make it works?
Code:
private void tbrFontNameComboBox_DrawItem(object sender, DrawItemEventArgs e)
{
e.DrawBackground();
if (e.Index >= 0)
{
Graphics g = e.Graphics;
Brush brush = ((e.State & DrawItemState.Selected) == DrawItemState.Selected) ?
new SolidBrush(Color.Blue) : new SolidBrush(e.BackColor);
Brush tBrush = new SolidBrush(e.ForeColor);
g.FillRectangle(brush, e.Bounds);
Font font = new Font(tbrFontName.Items[e.Index].ToString(), 10);
e.Graphics.DrawString(tbrFontName.Items[e.Index].ToString(), font,
tBrush, e.Bounds, StringFormat.GenericDefault);
brush.Dispose();
tBrush.Dispose();
font.Dispose();
}
e.DrawFocusRectangle();
}

Put Bold font in title of tab in a tabcontrol c#

I've got this tab control:
I need to put the tab name "Notes" in a bold font but I don't know how to.
I tried this code:
tabControl2.Font = new Font(this.Font, FontStyle.Bold);
However, it put all tabs in bold. Then I tried this:
tabControl2.TabPages["Notes"].Font = new Font(this.Font, FontStyle.Bold);
I also tried this :
How do I make a TabPage's title text bold?
Graphics g = e.Graphics;
Brush _TextBrush;
// Get the item from the collection.
TabPage _TabPage = tabControl2.TabPages["Notes"];
// Get the real bounds for the tab rectangle.
Rectangle _TabBounds = tabControl2.GetTabRect(1);
_TextBrush = new System.Drawing.SolidBrush(e.ForeColor);
// Use our own font. Because we CAN.
Font _TabFont = new Font(e.Font.FontFamily, (float)9, FontStyle.Bold, GraphicsUnit.Pixel);
// Draw string. Center the text.
StringFormat _StringFlags = new StringFormat();
_StringFlags.Alignment = StringAlignment.Center;
_StringFlags.LineAlignment = StringAlignment.Center;
g.DrawString(tabControl2.TabPages["Notes"].Text, _TabFont, _TextBrush, _TabBounds, new StringFormat(_StringFlags));
However, it put all the content of the tab in bold and not the title. I don't know how to put the title of this specific tabpage. Does anyone have an idea ?

I hope I can be of any help to you.　
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
tabControl.DrawMode = TabDrawMode.OwnerDrawFixed;
tabControl.DrawItem += TabControlOnDrawItem;
}
private FontStyle HasNotification(string tabText)
{
return tabText.Equals("Notes") && true
? FontStyle.Bold
: FontStyle.Regular;
}
private void TabControlOnDrawItem(object sender, DrawItemEventArgs e)
{
var tab = (TabControl) sender;
var tabText = tab.TabPages[e.Index].Text;
e.Graphics
.DrawString(tabText
, new Font(tab.Font.FontFamily
, tab.Font.Size
, HasNotification(tabText))
, Brushes.Black
, e.Bounds
, new StringFormat
{
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
});
}
}

How do you align the tabs with the tab page in c#?

Ok, so I need to align the tabs with the tab pages in c#. I tried changing the size properties of the tabs and the pages but it doesn't help. It won't let me change the size property of the tab page to match the tab property size. I have also tried changing the font of the text on the tabs themselves. There may be some padding/border/etc. that keeps it from being aligned, I'm not sure. I also went into the tab control property "collection" and manually edited the margins/padding but couldn't get it to work. How do I get it to align? See image below.
tabcontrol
Here is my code for the tab control:
{
InitializeComponent();
tabControl.DrawItem += new DrawItemEventHandler(tabControl_DrawItem);
}
private void tabControl_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
Graphics g = e.Graphics;
Brush txtBrush;
TabPage tabPage = tabControl.TabPages[e.Index];
Rectangle tabBounds = tabControl.GetTabRect(e.Index);
if (e.State == DrawItemState.Selected)
{
txtBrush = new SolidBrush(Color.White);
g.FillRectangle(Brushes.DarkGray, e.Bounds);
}
else
{
txtBrush = new System.Drawing.SolidBrush(e.ForeColor);
e.DrawBackground();
}
Font tabFont = new Font("Proggy", 15, FontStyle.Bold, GraphicsUnit.Pixel);
StringFormat strFlags = new StringFormat();
strFlags.Alignment = StringAlignment.Center;
strFlags.LineAlignment = StringAlignment.Center;
g.DrawString(tabPage.Text, tabFont, txtBrush, tabBounds, new StringFormat(strFlags));
}

C# tab control left horizontal alignment with picture

I have followed the instructions in the msdn website:
https://msdn.microsoft.com/en-us/library/vstudio/ms404305%28v=vs.100%29.aspx
to display a tab control as the following picture:
And this is the code:
private void tcMain_DrawItem(Object sender, DrawItemEventArgs e)
{
Graphics g = e.Graphics;
Brush _textBrush;
TabPage _tabPage = tcMain.TabPages[e.Index];
Rectangle _tabBounds = tcMain.GetTabRect(e.Index);
if (e.State == DrawItemState.Selected)
{
_textBrush = new SolidBrush(Color.Red);
g.FillRectangle(Brushes.Gray, e.Bounds);
}
else
{
_textBrush = new System.Drawing.SolidBrush(e.ForeColor);
e.DrawBackground();
}
Font _tabFont = new Font("Times New Roman", (float)22, FontStyle.Regular, GraphicsUnit.Pixel);
StringFormat _stringFlags = new StringFormat();
_stringFlags.Alignment = StringAlignment.Near;
_stringFlags.LineAlignment = StringAlignment.Center;
g.DrawString(_tabPage.Text, _tabFont, _textBrush, _tabBounds, new StringFormat(_stringFlags));
}
Now I want to add a picture to the left of the tab control buttons? I mean, how to show a picture to the left of the word Book for example?
After trying some answers from below I ended up with the code:
private void tcMain_DrawItem(Object sender, DrawItemEventArgs e)
{
Graphics g = e.Graphics;
Brush _textBrush;
TabPage _tabPage = tcMain.TabPages[e.Index];
Rectangle _tabBounds = tcMain.GetTabRect(e.Index);
if (e.State == DrawItemState.Selected)
{
_textBrush = new SolidBrush(Color.Red);
g.FillRectangle(Brushes.Gray, e.Bounds);
}
else
{
_textBrush = new System.Drawing.SolidBrush(e.ForeColor);
e.DrawBackground();
}
tcMain.ImageList = imgList;
tcMain.TabPages[0].ImageIndex = 1;
tcMain.TabPages[1].ImageIndex = 0;
tcMain.TabPages[2].ImageIndex = 3;
tcMain.TabPages[3].ImageIndex = 2;
Rectangle tabImage = tcMain.GetTabRect(e.Index);
tabImage.Size = new Size(40, 40);
g.DrawImage(tcMain.ImageList.Images[_tabPage.ImageIndex], tabImage);
Font _tabFont = new Font("Times New Roman", (float)22, FontStyle.Regular, GraphicsUnit.Pixel);
StringFormat _stringFlags = new StringFormat();
_stringFlags.Alignment = StringAlignment.Center;
_stringFlags.LineAlignment = StringAlignment.Center;
g.DrawString(_tabPage.Text, _tabFont, _textBrush, _tabBounds, new StringFormat(_stringFlags));
}
Then when I take a snapshot to the results it comes like this:
Refreshing all the time

You could add an ImageList control to your project and add some images to it and set the ImageIndex property of your TabPages. Then just use DrawImage() method in your DrawItem event.
Rectangle tabImage = tcMain.GetTabRect(e.Index);
tabImage.Size = new Size(16, 16);
g.DrawImage(tcMain.ImageList.Images[_tabPage.ImageIndex], tabImage);
You could also use ImageKey instead of ImageIndex.
g.DrawImage(tcMain.ImageList.Images[_tabPage.ImageKey], tabImage);
If you add the ImageList and the ImageIndex programmatically take a look:
ImageList imageList = new ImageList();
imageList.Images.Add("key1", Image.FromFile("pathtofile"));
imageList.Images.Add("key2", Image.FromFile("pathtofile"));
tcMain.ImageList = imageList;
tcMain.TabPages[0].ImageIndex = 1;
tcMain.TabPages[1].ImageIndex = 0;

C# Winform: How to set the Base Color of a TabControl (not the tabpage) AND use an icon

I applied the solution provided by an user to solve the problem, but it's happening another problem. Previously I owned an icon along with the text, but after I used the code described here, my icon no longer appears. What can it be?
And how can I use the icon while using a different color other than the default on tab header?
The solution I used is:
private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
TabPage CurrentTab = tabControl1.TabPages[e.Index];
Rectangle ItemRect = tabControl1.GetTabRect(e.Index);
SolidBrush FillBrush = new SolidBrush(Color.Red);
SolidBrush TextBrush = new SolidBrush(Color.White);
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
//If we are currently painting the Selected TabItem we'll
//change the brush colors and inflate the rectangle.
if (System.Convert.ToBoolean(e.State & DrawItemState.Selected))
{
FillBrush.Color = Color.White;
TextBrush.Color = Color.Red;
ItemRect.Inflate(2, 2);
}
//Set up rotation for left and right aligned tabs
if (tabControl1.Alignment == TabAlignment.Left || tabControl1.Alignment == TabAlignment.Right)
{
float RotateAngle = 90;
if (tabControl1.Alignment == TabAlignment.Left)
RotateAngle = 270;
PointF cp = new PointF(ItemRect.Left + (ItemRect.Width / 2), ItemRect.Top + (ItemRect.Height / 2));
e.Graphics.TranslateTransform(cp.X, cp.Y);
e.Graphics.RotateTransform(RotateAngle);
ItemRect = new Rectangle(-(ItemRect.Height / 2), -(ItemRect.Width / 2), ItemRect.Height, ItemRect.Width);
}
//Next we'll paint the TabItem with our Fill Brush
e.Graphics.FillRectangle(FillBrush, ItemRect);
//Now draw the text.
e.Graphics.DrawString(CurrentTab.Text, e.Font, TextBrush, (RectangleF)ItemRect, sf);
//Reset any Graphics rotation
e.Graphics.ResetTransform();
//Finally, we should Dispose of our brushes.
FillBrush.Dispose();
TextBrush.Dispose();
}

You need to paint the Icon yourself also. An example would be to add something like the following after the painting of the tabs Background in you code (i assume that an image list was used here)
int imageLeftOffset = 4;
Point imagePos = new Point(imageLeftOffset, ItemRect.Top + (ItemRect.Height - tabControl1.ImageList.ImageSize.Height + 1) / 2);
tabControl1.ImageList.Draw(e.Graphics, imagePos, CurrentTab.ImageIndex);
You may need to reajust the drawing of the Text so that text and image aren't overlapping.