Develop Reference

Winform UserControl update while not visible

I have a tabControl in a Winform application. The user is able to change settings that will impact each tab visually, and I need to get each tabs as images.
I'm trying to understand why/how some controls are updating even if not visible and some other don't.
Is there a way to force an existing UserControl to update/redraw even if not visible so that Control.DrawToBitmap(...) gets a valid image?
I created an example with a Chart and a FlowLayoutPanel to explain what I mean and to make sure I could reproduce the issue I have.
In the example below:
The image created from the FlowLayoutPanel is only correct if it was updated and visible before DrawToBitmap is called.
The image from the Chart is alway up to date even if updated when not visible.
Questions:
How does it work with one control and not the other?
How could I ensure the FlowLayoutPanel has the same behavior as the Chart?
(EDIT) I have tried a few things without success:
Suspend/Resume layout when updating
call Refresh / Update / Invalidate on the layout that do not update as expected
Here is a gif showing that the chart get updated even when not visible but not the FlowLayoutPanel:
Here is the code of this example:
using LiveChartsCore.SkiaSharpView;
using System.Collections.ObjectModel;
namespace WinFormsDrawToBitmapTest
{
public partial class Form1 : Form
{
int legendCount = 1;
ViewModel viewModel;
public Form1()
{
InitializeComponent();
viewModel = new ViewModel();
cartesianChart1.Series = viewModel.Series;
updateLegend(this.flowLayoutPanel1);
}
private async void button1_Click(object sender, EventArgs e)
{
Bitmap bitmap = await Task.Run(() => getImg3());
this.pictureBox1.Image = bitmap;
this.pictureBox1.Invoke((MethodInvoker)delegate
{ this.pictureBox1.Image = bitmap; });
}
private Bitmap getImg3()
{
Bitmap bitmap = new Bitmap(this.cartesianChart1.Width, this.cartesianChart1.Height + this.flowLayoutPanel1.Height);
Bitmap chart = new Bitmap(this.cartesianChart1.Width, this.cartesianChart1.Height);
Bitmap legend = new Bitmap(this.flowLayoutPanel1.Width, this.flowLayoutPanel1.Height);
this.cartesianChart1.Invoke((MethodInvoker)delegate
{
this.cartesianChart1.DrawToBitmap(chart, new Rectangle(new Point(0, 0), this.cartesianChart1.Size));
});
this.flowLayoutPanel1.Invoke((MethodInvoker)delegate
{
this.flowLayoutPanel1.DrawToBitmap(legend, new Rectangle(new Point(0, 0), this.flowLayoutPanel1.Size));
});
using (Graphics g = Graphics.FromImage(bitmap))
{
g.DrawImage(legend, 0, 0);
g.DrawImage(chart, 0, legend.Height);
}
return bitmap;
}
private void button2_Click(object sender, EventArgs e)
{
Random r = new Random();
viewModel.Data.Add(r.Next(0, 10));
legendCount++;
updateLegend(this.flowLayoutPanel1);
}
private void updateLegend(FlowLayoutPanel flow)
{
flow.Controls.Clear();
Color[] colorList = new Color[]
{
Color.FromArgb(15, 1, 215),
Color.FromArgb(255, 0, 0),
Color.FromArgb(0, 176, 80),
Color.FromArgb(112, 48, 160)
};
for (int i = 0; i < legendCount; i++)
{
//flow.Controls.Add(new LegendLabel($"Label {i}", colorList[i % colorList.Length]));
Button btn = new Button();
btn.Name = $"Button {i}";
btn.TabIndex = 0;
btn.Text = $"Button {i}";
flow.Controls.Add(btn);
}
}
}
public partial class ViewModel
{
public ObservableCollection<double> Data { get; set; }
public List<LineSeries<double>> Series { get; set; }
public ViewModel()
{
Data = new ObservableCollection<double>();
Data.Add(1); Data.Add(2); Data.Add(5); Data.Add(4);
Series = new List<LineSeries<double>>();
Series.Add(new LineSeries<double> { Values = Data, Fill = null });
}
}
}
With the associated .Designer.cs in case it helps
namespace WinFormsDrawToBitmapTest
{
partial class Form1
{
/// <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 Windows Form 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.panel2 = new System.Windows.Forms.Panel();
this.button2 = new System.Windows.Forms.Button();
this.button1 = new System.Windows.Forms.Button();
this.tabControl1 = new System.Windows.Forms.TabControl();
this.tabPage1 = new System.Windows.Forms.TabPage();
this.cartesianChart1 = new LiveChartsCore.SkiaSharpView.WinForms.CartesianChart();
this.flowLayoutPanel1 = new System.Windows.Forms.FlowLayoutPanel();
this.tabPage2 = new System.Windows.Forms.TabPage();
this.pictureBox1 = new System.Windows.Forms.PictureBox();
this.panel2.SuspendLayout();
this.tabControl1.SuspendLayout();
this.tabPage1.SuspendLayout();
this.tabPage2.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
this.SuspendLayout();
//
// panel2
//
this.panel2.Controls.Add(this.button2);
this.panel2.Controls.Add(this.button1);
this.panel2.Dock = System.Windows.Forms.DockStyle.Top;
this.panel2.Location = new System.Drawing.Point(0, 0);
this.panel2.Name = "panel2";
this.panel2.Size = new System.Drawing.Size(1042, 24);
this.panel2.TabIndex = 1;
//
// button2
//
this.button2.Location = new System.Drawing.Point(167, 0);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(86, 23);
this.button2.TabIndex = 1;
this.button2.Text = "Change Tab1";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button1
//
this.button1.Location = new System.Drawing.Point(0, 0);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(161, 23);
this.button1.TabIndex = 0;
this.button1.Text = "Get Tab1 as Image in Tab 2";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// tabControl1
//
this.tabControl1.Controls.Add(this.tabPage1);
this.tabControl1.Controls.Add(this.tabPage2);
this.tabControl1.Dock = System.Windows.Forms.DockStyle.Fill;
this.tabControl1.Location = new System.Drawing.Point(0, 24);
this.tabControl1.Name = "tabControl1";
this.tabControl1.SelectedIndex = 0;
this.tabControl1.Size = new System.Drawing.Size(1042, 585);
this.tabControl1.TabIndex = 2;
//
// tabPage1
//
this.tabPage1.Controls.Add(this.cartesianChart1);
this.tabPage1.Controls.Add(this.flowLayoutPanel1);
this.tabPage1.Location = new System.Drawing.Point(4, 24);
this.tabPage1.Name = "tabPage1";
this.tabPage1.Padding = new System.Windows.Forms.Padding(3);
this.tabPage1.Size = new System.Drawing.Size(1034, 557);
this.tabPage1.TabIndex = 0;
this.tabPage1.Text = "tabPage1";
this.tabPage1.UseVisualStyleBackColor = true;
//
// cartesianChart1
//
this.cartesianChart1.Location = new System.Drawing.Point(8, 116);
this.cartesianChart1.Name = "cartesianChart1";
this.cartesianChart1.Size = new System.Drawing.Size(1018, 435);
this.cartesianChart1.TabIndex = 4;
//
// flowLayoutPanel1
//
this.flowLayoutPanel1.Location = new System.Drawing.Point(8, 6);
this.flowLayoutPanel1.Name = "flowLayoutPanel1";
this.flowLayoutPanel1.Size = new System.Drawing.Size(1018, 100);
this.flowLayoutPanel1.TabIndex = 3;
//
// tabPage2
//
this.tabPage2.Controls.Add(this.pictureBox1);
this.tabPage2.Location = new System.Drawing.Point(4, 24);
this.tabPage2.Name = "tabPage2";
this.tabPage2.Padding = new System.Windows.Forms.Padding(3);
this.tabPage2.Size = new System.Drawing.Size(1034, 557);
this.tabPage2.TabIndex = 1;
this.tabPage2.Text = "tabPage2";
this.tabPage2.UseVisualStyleBackColor = true;
//
// pictureBox1
//
this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill;
this.pictureBox1.Location = new System.Drawing.Point(3, 3);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(1028, 551);
this.pictureBox1.TabIndex = 0;
this.pictureBox1.TabStop = false;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 15F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(1042, 609);
this.Controls.Add(this.tabControl1);
this.Controls.Add(this.panel2);
this.Name = "Form1";
this.Text = "Form1";
this.panel2.ResumeLayout(false);
this.tabControl1.ResumeLayout(false);
this.tabPage1.ResumeLayout(false);
this.tabPage2.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
this.ResumeLayout(false);
}
#endregion
private Panel panel2;
private Button button1;
private TabControl tabControl1;
private TabPage tabPage1;
private TabPage tabPage2;
private PictureBox pictureBox1;
private FlowLayoutPanel flowLayoutPanel1;
private LiveChartsCore.SkiaSharpView.WinForms.CartesianChart cartesianChart1;
private Button button2;
}
}
Thank you for your help with this.

How do I fix broken/disappearing controls

I can only guess the problem lies within the following code, but I'm not 100% sure. The problem only occurs when I try to move the CtrlComputer object in the panel in the RoomDesigner form. The aim of the code is to get the CtrlComputer object to move as one when clicked. Unfortunately without the foreach loop, moves the label1 separately, but still makes an grey box around it when dragged. See here for a clearer picture. I'm not sure why dragging objects around would enlarge the custom control itself.
CtrlComputer
public CtrlComputer()
{
InitializeComponent();
label1.MouseMove += new MouseEventHandler(textbox_MouseMove);
CompButton.MouseMove += new MouseEventHandler(textbox_MouseMove);
this.MouseMove += new MouseEventHandler(textbox_MouseMove);
void textbox_MouseMove(object sender, MouseEventArgs e)
{
if (activeControl == null || activeControl != sender)
return;
foreach (Control control in this.Controls)
{
var location = control.Location;
location.Offset(e.Location.X - previousLocation.X, e.Location.Y - previousLocation.Y);
control.Location = location;
}
}
CtrlComputer.Designer
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.CompButton = new WindowsFormsApplication1.DoubleClickButton();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.BackColor = System.Drawing.Color.Lime;
this.label1.Location = new System.Drawing.Point(7, 20);
this.label1.Margin = new System.Windows.Forms.Padding(0);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(35, 13);
this.label1.TabIndex = 39;
this.label1.Text = "label1";
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// CompButton
//
this.CompButton.BackColor = System.Drawing.Color.Transparent;
this.CompButton.BackgroundImage = global::SchoolAdmin.Properties.Resources.memeio;
this.CompButton.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
this.CompButton.Location = new System.Drawing.Point(0, 0);
this.CompButton.Name = "CompButton";
this.CompButton.Size = new System.Drawing.Size(62, 57);
this.CompButton.TabIndex = 40;
this.CompButton.UseVisualStyleBackColor = false;
//
// CtrlComputer
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.AutoSize = true;
this.BackColor = System.Drawing.Color.Transparent;
this.Controls.Add(this.label1);
this.Controls.Add(this.CompButton);
this.Name = "CtrlComputer";
this.Size = new System.Drawing.Size(65, 60);
this.ResumeLayout(false);
this.PerformLayout();
}
CtrlComputer - http://pastebin.com/GJ3aXJFb

ObjectDisposedException when moving form

I made a custom form.
Now I'm trying to implement the feature to drag the form around while holding the titlebar. But it always throws this exception:
system.ObjectDisposedException
Has anyone an idea what the problem is?
This is my code:
[DllImportAttribute("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
[DllImportAttribute("user32.dll")]
public static extern bool ReleaseCapture();
Form form;
Button buttonCancel;
Button buttonOk;
DialogResult InputBox(string title, string promptText, ref string value)
{
form = new Form();
buttonCancel = new Button();
buttonOk = new Button();
Label label = new Label();
TextBox textBox = new TextBox();
Panel titlebar = new Panel();
Label lbltitle = new Label();
Panel pnlexit = new Panel();
Label lblexit = new Label();
form.Text = title;
label.Text = promptText;
textBox.Text = value;
buttonOk.Text = "OK";
buttonCancel.Text = "Cancel";
buttonOk.DialogResult = DialogResult.OK;
buttonCancel.DialogResult = DialogResult.Cancel;
label.SetBounds(9, 20, 372, 13);
textBox.SetBounds(12, 36, 372, 20);
buttonOk.SetBounds(228, 72, 75, 23);
buttonCancel.SetBounds(309, 72, 75, 23);
buttonCancel.Location = new Point(250, 100);
buttonCancel.Parent = form;
buttonCancel.BackColor = ColorTranslator.FromHtml("#CDDC39");
buttonCancel.FlatStyle = FlatStyle.Flat;
buttonCancel.FlatAppearance.BorderSize = 0;
buttonCancel.MouseClick += ButtonCancel_MouseClick;
buttonOk.Location = new Point(170, 100);
buttonOk.Parent = form;
buttonOk.BackColor = ColorTranslator.FromHtml("#CDDC39");
buttonOk.FlatStyle = FlatStyle.Flat;
buttonOk.FlatAppearance.BorderSize = 0;
form.Height = 150;
form.Width = 350;
form.BackColor = ColorTranslator.FromHtml("#455A64");
form.FormBorderStyle = FormBorderStyle.None;
form.AutoSize = false;
form.StartPosition = FormStartPosition.CenterScreen;
form.AcceptButton = buttonOk;
form.CancelButton = buttonCancel;
titlebar.Width = form.Width;
titlebar.Height = 25;
titlebar.BackColor = ColorTranslator.FromHtml("#37474F");
titlebar.Parent = form;
titlebar.Controls.Add(pnlexit);
titlebar.MouseDown += Titlebar_MouseDown;
lblexit.Text = "X";
lblexit.Font = new Font("Arial", 9.5f, FontStyle.Bold);
lblexit.TextAlign = ContentAlignment.MiddleCenter;
lblexit.Dock = DockStyle.Fill;
lblexit.MouseClick += lblexit_click;
pnlexit.Height = titlebar.Height - 10;
pnlexit.Width = 30;
pnlexit.BackColor = ColorTranslator.FromHtml("#CDDC39");
pnlexit.Location = new Point(titlebar.Width - 33, 0);
pnlexit.Parent = titlebar;
pnlexit.Controls.Add(lblexit);
lbltitle.Parent = titlebar;
lbltitle.Text = title;
lbltitle.ForeColor = ColorTranslator.FromHtml("#CDDC39");
lbltitle.Font = new Font("Arial", 9.5f, FontStyle.Bold);
lbltitle.Location = new Point(5, 3);
label.AutoSize = true;
label.Location = new Point(25, 50);
label.Parent = form;
label.ForeColor = Color.White;
textBox.Parent = form;
textBox.Location = new Point(25, 65);
textBox.Width = 300;
DialogResult dialogResult = form.ShowDialog();
value = textBox.Text;
Console.WriteLine("Value = " + value);
return dialogResult;
}
private void Titlebar_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
ReleaseCapture();
SendMessage(Handle, WM_NCLBUTTONDOWN, HT_CAPTION, 0);
}
}
private void ButtonCancel_MouseClick(object sender, MouseEventArgs e)
{
// throw new NotImplementedException();
}
private void lblexit_click(object sender, MouseEventArgs e)
{
form.Close();
}

How come my label is unclickable?

I'm trying to create a project in c# , mainly a memory game. It was all going pretty well till i came upon an issue that i haven't seen anyone else have and that really baffles me since i don't think i'm doing anything really complicated. On my "Form" are 16 labels , all with a single method on click. When i run my program , the click part never happens. The buttons work fine and the line-by-line debug starts when they are clicked on.But on the labels it just does nothing , never calls it.Here are a few things that might be needed:
Forum1.Designer.cs*
namespace MatchingGame1
{
partial class Form1
{
/// <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 Windows Form 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.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.label5 = new System.Windows.Forms.Label();
this.label7 = new System.Windows.Forms.Label();
this.label9 = new System.Windows.Forms.Label();
this.label10 = new System.Windows.Forms.Label();
this.label11 = new System.Windows.Forms.Label();
this.label12 = new System.Windows.Forms.Label();
this.label13 = new System.Windows.Forms.Label();
this.label14 = new System.Windows.Forms.Label();
this.label15 = new System.Windows.Forms.Label();
this.label16 = new System.Windows.Forms.Label();
this.label6 = new System.Windows.Forms.Label();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.label8 = new System.Windows.Forms.Label();
this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
this.tableLayoutPanel1.SuspendLayout();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(567, 57);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(97, 69);
this.button1.TabIndex = 1;
this.button1.Text = "Start";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Enabled = false;
this.button2.Location = new System.Drawing.Point(570, 152);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(93, 81);
this.button2.TabIndex = 2;
this.button2.Text = "Hide";
this.button2.UseVisualStyleBackColor = true;
this.button2.Visible = false;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// label5
//
this.label5.Dock = System.Windows.Forms.DockStyle.Fill;
this.label5.Location = new System.Drawing.Point(5, 129);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(125, 125);
this.label5.TabIndex = 4;
this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label5.Click += new System.EventHandler(this.label1_Click);
//
// label7
//
this.label7.Dock = System.Windows.Forms.DockStyle.Fill;
this.label7.Location = new System.Drawing.Point(271, 129);
this.label7.Name = "label7";
this.label7.Size = new System.Drawing.Size(125, 125);
this.label7.TabIndex = 6;
this.label7.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label7.Click += new System.EventHandler(this.label1_Click);
//
// label9
//
this.label9.Dock = System.Windows.Forms.DockStyle.Fill;
this.label9.Location = new System.Drawing.Point(5, 256);
this.label9.Name = "label9";
this.label9.Size = new System.Drawing.Size(125, 125);
this.label9.TabIndex = 8;
this.label9.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label9.Click += new System.EventHandler(this.label1_Click);
//
// label10
//
this.label10.Dock = System.Windows.Forms.DockStyle.Fill;
this.label10.Location = new System.Drawing.Point(138, 256);
this.label10.Name = "label10";
this.label10.Size = new System.Drawing.Size(125, 125);
this.label10.TabIndex = 9;
this.label10.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label10.Click += new System.EventHandler(this.label1_Click);
//
// label11
//
this.label11.Dock = System.Windows.Forms.DockStyle.Fill;
this.label11.Location = new System.Drawing.Point(271, 256);
this.label11.Name = "label11";
this.label11.Size = new System.Drawing.Size(125, 125);
this.label11.TabIndex = 10;
this.label11.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label11.Click += new System.EventHandler(this.label1_Click);
//
// label12
//
this.label12.Dock = System.Windows.Forms.DockStyle.Fill;
this.label12.Location = new System.Drawing.Point(404, 256);
this.label12.Name = "label12";
this.label12.Size = new System.Drawing.Size(125, 125);
this.label12.TabIndex = 11;
this.label12.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label12.Click += new System.EventHandler(this.label1_Click);
//
// label13
//
this.label13.Dock = System.Windows.Forms.DockStyle.Fill;
this.label13.Location = new System.Drawing.Point(5, 383);
this.label13.Name = "label13";
this.label13.Size = new System.Drawing.Size(125, 127);
this.label13.TabIndex = 12;
this.label13.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label13.Click += new System.EventHandler(this.label1_Click);
//
// label14
//
this.label14.Dock = System.Windows.Forms.DockStyle.Fill;
this.label14.Location = new System.Drawing.Point(138, 383);
this.label14.Name = "label14";
this.label14.Size = new System.Drawing.Size(125, 127);
this.label14.TabIndex = 13;
this.label14.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label14.Click += new System.EventHandler(this.label1_Click);
//
// label15
//
this.label15.Dock = System.Windows.Forms.DockStyle.Fill;
this.label15.Location = new System.Drawing.Point(271, 383);
this.label15.Name = "label15";
this.label15.Size = new System.Drawing.Size(125, 127);
this.label15.TabIndex = 14;
this.label15.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label15.Click += new System.EventHandler(this.label1_Click);
//
// label16
//
this.label16.Dock = System.Windows.Forms.DockStyle.Fill;
this.label16.Location = new System.Drawing.Point(404, 383);
this.label16.Name = "label16";
this.label16.Size = new System.Drawing.Size(125, 127);
this.label16.TabIndex = 15;
this.label16.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label16.Click += new System.EventHandler(this.label1_Click);
//
// label6
//
this.label6.Dock = System.Windows.Forms.DockStyle.Fill;
this.label6.Location = new System.Drawing.Point(138, 129);
this.label6.Name = "label6";
this.label6.Size = new System.Drawing.Size(125, 125);
this.label6.TabIndex = 5;
this.label6.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label6.Click += new System.EventHandler(this.label1_Click);
//
// label1
//
this.label1.Dock = System.Windows.Forms.DockStyle.Fill;
this.label1.Location = new System.Drawing.Point(5, 2);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(125, 125);
this.label1.TabIndex = 0;
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label1.Click += new System.EventHandler(this.label1_Click);
//
// label2
//
this.label2.Dock = System.Windows.Forms.DockStyle.Fill;
this.label2.Location = new System.Drawing.Point(138, 2);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(125, 125);
this.label2.TabIndex = 1;
this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label2.Click += new System.EventHandler(this.label1_Click);
//
// label3
//
this.label3.Dock = System.Windows.Forms.DockStyle.Fill;
this.label3.Location = new System.Drawing.Point(271, 2);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(125, 125);
this.label3.TabIndex = 2;
this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label3.Click += new System.EventHandler(this.label1_Click);
//
// label4
//
this.label4.Dock = System.Windows.Forms.DockStyle.Fill;
this.label4.Location = new System.Drawing.Point(404, 2);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(125, 125);
this.label4.TabIndex = 3;
this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label4.Click += new System.EventHandler(this.label1_Click);
//
// label8
//
this.label8.Dock = System.Windows.Forms.DockStyle.Fill;
this.label8.Location = new System.Drawing.Point(404, 129);
this.label8.Name = "label8";
this.label8.Size = new System.Drawing.Size(125, 125);
this.label8.TabIndex = 7;
this.label8.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
this.label8.Click += new System.EventHandler(this.label1_Click);
//
// tableLayoutPanel1
//
this.tableLayoutPanel1.AccessibleRole = System.Windows.Forms.AccessibleRole.None;
this.tableLayoutPanel1.BackColor = System.Drawing.SystemColors.HotTrack;
this.tableLayoutPanel1.CellBorderStyle = System.Windows.Forms.TableLayoutPanelCellBorderStyle.Inset;
this.tableLayoutPanel1.ColumnCount = 4;
this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.Controls.Add(this.label8, 3, 1);
this.tableLayoutPanel1.Controls.Add(this.label13, 0, 3);
this.tableLayoutPanel1.Controls.Add(this.label14, 1, 3);
this.tableLayoutPanel1.Controls.Add(this.label15, 2, 3);
this.tableLayoutPanel1.Controls.Add(this.label16, 3, 3);
this.tableLayoutPanel1.Controls.Add(this.label12, 3, 2);
this.tableLayoutPanel1.Controls.Add(this.label11, 2, 2);
this.tableLayoutPanel1.Controls.Add(this.label10, 1, 2);
this.tableLayoutPanel1.Controls.Add(this.label9, 0, 2);
this.tableLayoutPanel1.Controls.Add(this.label5, 0, 1);
this.tableLayoutPanel1.Controls.Add(this.label6, 1, 1);
this.tableLayoutPanel1.Controls.Add(this.label7, 2, 1);
this.tableLayoutPanel1.Controls.Add(this.label4, 3, 0);
this.tableLayoutPanel1.Controls.Add(this.label3, 2, 0);
this.tableLayoutPanel1.Controls.Add(this.label1, 0, 0);
this.tableLayoutPanel1.Controls.Add(this.label2, 1, 0);
this.tableLayoutPanel1.Location = new System.Drawing.Point(0, 0);
this.tableLayoutPanel1.Name = "tableLayoutPanel1";
this.tableLayoutPanel1.RowCount = 4;
this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
this.tableLayoutPanel1.Size = new System.Drawing.Size(534, 512);
this.tableLayoutPanel1.TabIndex = 0;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(255)))), ((int)(((byte)(128)))), ((int)(((byte)(0)))));
this.ClientSize = new System.Drawing.Size(671, 512);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.tableLayoutPanel1);
this.Name = "Form1";
this.Text = "Matching Game";
this.tableLayoutPanel1.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.Label label7;
private System.Windows.Forms.Label label9;
private System.Windows.Forms.Label label10;
private System.Windows.Forms.Label label11;
private System.Windows.Forms.Label label12;
private System.Windows.Forms.Label label13;
private System.Windows.Forms.Label label14;
private System.Windows.Forms.Label label15;
private System.Windows.Forms.Label label16;
private System.Windows.Forms.Label label6;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Label label8;
private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
}
}
Form1.cs
using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MatchingGame1
{
public partial class Form1 : Form
{
Random random = new Random();
private List<Image> takeIm()
{
string directory = #".\";
List<Image> ImageList = new List<Image>();
foreach (string myFile in Directory.GetFiles(directory, "*.jpg", SearchOption.AllDirectories))
{
ImageList.Add(Image.FromFile(myFile));
ImageList.Add(Image.FromFile(myFile));
}
return ImageList;
}
private void AssignImagesToSquares(List<Image> a)
{
foreach (Control control in tableLayoutPanel1.Controls)
{
Label imageLabel = control as Label;
if (imageLabel != null)
{
int randomNumber = random.Next(a.Count);
imageLabel.Image = a[randomNumber];
a.RemoveAt(randomNumber);
}
}
}
public Form1()
{
InitializeComponent();
}
private void label1_Click(object sender, EventArgs e)
{
Label clickedLabel = sender as Label;
clickedLabel.Visible = true;
}
private void button1_Click(object sender, EventArgs e)
{
List<Image> a = new List<Image>();
a = takeIm();
AssignImagesToSquares(a);
button2.Visible = true;
button2.Enabled = true;
button1.Visible = false;
button1.Enabled = false;
}
private void button2_Click(object sender, EventArgs e)
{
button2.Enabled = false;
button2.Visible = false;
foreach (Control control in tableLayoutPanel1.Controls)
{
Label imageLabel = control as Label;
imageLabel.Visible = false;
}
}
}
}

I assume your labels was hidden before you try click on it
Control will not fire event Click if property Visible set to false.
If you want show/hidden control by clicking on it, then try to play with background color or picture in the control.
Hidden - no picture/transparent
Visible - picture or some background color will be shown

C# Buttons not repositioning themselves

I have included 4 buttons inside a panel. The panel is docked to the main window.
When I resize the main window, it doesn't reposition the 4 buttons with respect to the newly modified window size. I am using VS 2010 Designer view to accomplish this.
Here is the entire code generated from designer.cs
private void InitializeComponent()
{
this.statusStrip1 = new System.Windows.Forms.StatusStrip();
this.toolStripStatusLabel1 = new System.Windows.Forms.ToolStripStatusLabel();
this.TreeDDC = new System.Windows.Forms.TreeView();
this.BtnPointCtrl = new System.Windows.Forms.Button();
this.BtnLogic = new System.Windows.Forms.Button();
this.BtnComm = new System.Windows.Forms.Button();
this.BtnSystem = new System.Windows.Forms.Button();
this.panel1 = new System.Windows.Forms.Panel();
this.statusStrip1.SuspendLayout();
this.panel1.SuspendLayout();
this.SuspendLayout();
//
// statusStrip1
//
this.statusStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.toolStripStatusLabel1});
this.statusStrip1.Location = new System.Drawing.Point(0, 445);
this.statusStrip1.Name = "statusStrip1";
this.statusStrip1.Size = new System.Drawing.Size(639, 22);
this.statusStrip1.TabIndex = 0;
this.statusStrip1.Text = "statusBar";
//
// toolStripStatusLabel1
//
this.toolStripStatusLabel1.Name = "toolStripStatusLabel1";
this.toolStripStatusLabel1.Size = new System.Drawing.Size(61, 17);
this.toolStripStatusLabel1.Text = "Status Bar";
//
// TreeDDC
//
this.TreeDDC.Dock = System.Windows.Forms.DockStyle.Left;
this.TreeDDC.Location = new System.Drawing.Point(0, 0);
this.TreeDDC.Name = "TreeDDC";
this.TreeDDC.Size = new System.Drawing.Size(97, 445);
this.TreeDDC.TabIndex = 1;
//
// BtnPointCtrl
//
this.BtnPointCtrl.Location = new System.Drawing.Point(28, 93);
this.BtnPointCtrl.Name = "BtnPointCtrl";
this.BtnPointCtrl.Size = new System.Drawing.Size(202, 86);
this.BtnPointCtrl.TabIndex = 2;
this.BtnPointCtrl.Text = "???";
this.BtnPointCtrl.UseVisualStyleBackColor = true;
//
// BtnLogic
//
this.BtnLogic.Location = new System.Drawing.Point(28, 282);
this.BtnLogic.Name = "BtnLogic";
this.BtnLogic.Size = new System.Drawing.Size(202, 86);
this.BtnLogic.TabIndex = 4;
this.BtnLogic.Text = "??";
this.BtnLogic.UseVisualStyleBackColor = true;
//
// BtnComm
//
this.BtnComm.Location = new System.Drawing.Point(307, 93);
this.BtnComm.Name = "BtnComm";
this.BtnComm.Size = new System.Drawing.Size(202, 86);
this.BtnComm.TabIndex = 3;
this.BtnComm.Text = "??";
this.BtnComm.UseVisualStyleBackColor = true;
//
// BtnSystem
//
this.BtnSystem.Location = new System.Drawing.Point(307, 282);
this.BtnSystem.Name = "BtnSystem";
this.BtnSystem.Size = new System.Drawing.Size(202, 86);
this.BtnSystem.TabIndex = 5;
this.BtnSystem.Text = "???";
this.BtnSystem.UseVisualStyleBackColor = true;
//
// panel1
//
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.panel1.Controls.Add(this.BtnSystem);
this.panel1.Controls.Add(this.BtnComm);
this.panel1.Controls.Add(this.BtnPointCtrl);
this.panel1.Controls.Add(this.BtnLogic);
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Location = new System.Drawing.Point(97, 0);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(542, 445);
this.panel1.TabIndex = 6;
//
// MainForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(639, 467);
this.Controls.Add(this.panel1);
this.Controls.Add(this.TreeDDC);
this.Controls.Add(this.statusStrip1);
this.Name = "MainForm";
this.Text = "MainForm";
this.statusStrip1.ResumeLayout(false);
this.statusStrip1.PerformLayout();
this.panel1.ResumeLayout(false);
this.ResumeLayout(false);
this.PerformLayout();
}
But I believe the only code of interest will be the following:
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Controls.Add(this.BtnSystem);
this.panel1.Controls.Add(this.BtnComm);
this.panel1.Controls.Add(this.BtnPointCtrl);
this.panel1.Controls.Add(this.BtnLogic);
Any help will be greatly appreciated.

Use the Anchor property of the buttons...
Read it Working with Anchoring and Docking
The Panel does not itself repositioning the controls when it resizing, Use the Anchor (Top, Bottom, Left, Right) property that the controls reposition when parent Panel resizes...
Or Use TableLayOutPanel.

Docking the panel will only resize the panel iteelf, not reposition the controls within the panel. To have elements within a container change their position after resizing the container, look into the Anchor property. There is also TableLayoutPanel which can, as its name suggests, layout controls in a table format.

Please Dock a FlowLayoutPanel inside your panel and palce the buttons inside that FlowLayoutPanel. Set the Layout Direction property. Now when you resize the main window your buttons will also be resized.