Csharp/CSharp Tutorial/GUI Windows Forms

• ActiveX
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• ErrorProvider
• Event System
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• FloatLayoutPanel
• Form
• Form Event
• Form Paint
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• Generic Event
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• Internationalization
• Introduction
• KeyEvent
• Label
• LinkLabel
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• OpenFileDialog
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• Print Preview Dialog
• Print PrintDocument
• PrintDialog
• ProgressBar
• RadioButton
• Resource File
• Resx
• RichTextBox
• SaveFileDialog
• Screen capture
• ScrollBar
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• StatusBar
• TabControl
• TableLayoutPanel
• TextBox
• Thread UI
• Timer
• ToolStripMenuItem
• Toolbar
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• Validation
• WebBrowser
• event

Create a font from FontFamily

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontConstructor3 : Form {

 public FontConstructor3()
 {
       Text = "Font Constructor";
   Size = new Size(350,200);
   FontFamily ff = new FontFamily("Times New Roman");
   Font fnt = new Font(ff, 12, FontStyle.Bold | FontStyle.Italic);
   Font = fnt;
   RichTextBox rtxt = new RichTextBox();
   rtxt.Text = "first line.\n" +
         "This is a second line of text.";
   rtxt.Text += "\nFont Name:\t" + Font.Name;
   rtxt.Text += "\nFont Family:\t" + Font.FontFamily;
   rtxt.Text += "\nFont Styles:\t" + Font.Style;
   rtxt.Text += "\nFont Size:\t" + Font.Size;
   rtxt.Text += "\nFont Height:\t" + Font.Height;
   rtxt.Text += "\nFont Units:\t" + Font.Unit;
   rtxt.Multiline = true;
   rtxt.Dock = DockStyle.Fill;
   rtxt.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontConstructor3());
 }

}</source>

Create a font from font name and size

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontConstructor2 : Form {

 public FontConstructor2()
 {
       Text = "Font Constructor";
   Size = new Size(350,200);
   Font fnt = new Font("Times New Roman", 10);
   fnt = new Font(fnt, FontStyle.Bold | FontStyle.Italic);
   Font = fnt;
   RichTextBox rtxt = new RichTextBox();
   rtxt.Text = "first line.\n" +
         "This is a second line of text.";
   rtxt.Text += "\nFont Name:\t" + Font.Name;
   rtxt.Text += "\nFont Family:\t" + Font.FontFamily;
   rtxt.Text += "\nFont Styles:\t" + Font.Style;
   rtxt.Text += "\nFont Size:\t" + Font.Size;
   rtxt.Text += "\nFont Height:\t" + Font.Height;
   rtxt.Text += "\nFont Units:\t" + Font.Unit;
   rtxt.Multiline = true;
   rtxt.Dock = DockStyle.Fill;
   rtxt.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontConstructor2());
 }

}</source>

Font Constructor: derive a font

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontConstructor1 : Form {

 public FontConstructor1()
 {
   Size = new Size(350,200);
   Font fnt = Font;
   fnt = new Font(fnt, FontStyle.Bold | FontStyle.Italic);
   Font = fnt;
   RichTextBox rtxt = new RichTextBox();
   rtxt.Text = "first line.\n" +
         "This is a second line of text.";
   rtxt.Text += "\nFont Name:\t" + Font.Name;
   rtxt.Text += "\nFont Family:\t" + Font.FontFamily;
   rtxt.Text += "\nFont Styles:\t" + Font.Style;
   rtxt.Text += "\nFont Size:\t" + Font.Size;
   rtxt.Text += "\nFont Height:\t" + Font.Height;
   rtxt.Text += "\nFont Units:\t" + Font.Unit;
   rtxt.Multiline = true;
   rtxt.Dock = DockStyle.Fill;
   rtxt.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontConstructor1());
 }

}</source>

FontDialog Apply event

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontDialogFontApplyEvent : Form {

 private Button btnChange;
 private Label lbl;
 private FontDialog fd;
 public FontDialogFontApplyEvent()
 {
   Size = new Size(350,200);
   btnChange = new Button();
   btnChange.Location = new Point(200,50);
   btnChange.Size = new Size(100,23);
   btnChange.Text = "Change";
   btnChange.Click += new System.EventHandler(btnChange_Click);
   btnChange.Parent = this;
   lbl = new Label();
   lbl.Text = "test";
   lbl.AutoSize = true;
   lbl.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontDialogFontApplyEvent());
 }
 private void btnChange_Click(object sender, EventArgs e)
 {
   fd = new FontDialog();
   fd.ShowHelp = false;
   fd.ShowApply = true;
   fd.Apply += new System.EventHandler(this.fd_Apply);
   
   if (fd.ShowDialog() == DialogResult.OK)
     lbl.Font = fd.Font;
 }
 private void fd_Apply(object sender, System.EventArgs e)
 {
   lbl.Font = fd.Font;
 }

}</source>

Font Dialog: Display and get selected font

<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FontDialogDisplay : System.Windows.Forms.Form {

 private System.ruponentModel.Container components = null;
 private System.Windows.Forms.FontDialog fontDlg = new System.Windows.Forms.FontDialog();    
 private Font currFont = new Font("Times New Roman", 12);
 public FontDialogDisplay()
 {
   InitializeComponent();
 }
 protected override void Dispose( bool disposing )
 {
   if( disposing )
   {
     if (components != null) 
     {
       components.Dispose();
     }
   }
   base.Dispose( disposing );
 }

 private void InitializeComponent()
 {
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(292, 273);
   this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.FontDialogDisplay_MouseUp);
   this.Paint += new System.Windows.Forms.PaintEventHandler(this.FontDialogDisplay_Paint);
 }
 [STAThread]
 static void Main() 
 {
   Application.Run(new FontDialogDisplay());
 }
 private void FontDialogDisplay_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
 {
   Graphics g = e.Graphics;
   g.DrawString("Testing...", currFont, new SolidBrush(Color.Black), 0, 0);  
 }
 private void FontDialogDisplay_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
 {
   if (fontDlg.ShowDialog() != DialogResult.Cancel)
   {
     currFont = fontDlg.Font;
     Invalidate();
   }
 }

}</source>

FontDialog: set color, Apply event

<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class Form1 : System.Windows.Forms.Form {

   private System.Windows.Forms.Button button1;
   private System.Windows.Forms.Button button2;
   private System.Windows.Forms.Label label1;
   public Form1() {
       this.button1 = new System.Windows.Forms.Button();
       this.button2 = new System.Windows.Forms.Button();
       this.label1 = new System.Windows.Forms.Label();
       this.SuspendLayout();
       // 
       // button1
       // 
       this.button1.Location = new System.Drawing.Point(24, 8);
       this.button1.Name = "button1";
       this.button1.TabIndex = 0;
       this.button1.Text = "button1";
       this.button1.Click += new System.EventHandler(this.button1_Click_1);
       // 
       // button2
       // 
       this.button2.Location = new System.Drawing.Point(120, 8);
       this.button2.Name = "button2";
       this.button2.TabIndex = 1;
       this.button2.Text = "button2";
       this.button2.Click += new System.EventHandler(this.button2_Click);
       // 
       // label1
       // 
       this.label1.Location = new System.Drawing.Point(8, 48);
       this.label1.Name = "label1";
       this.label1.Size = new System.Drawing.Size(280, 48);
       this.label1.TabIndex = 2;
       this.label1.Text = "label1";
       // 
       // Form1
       // 
       this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
       this.ClientSize = new System.Drawing.Size(292, 101);
       this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                     this.label1,
                                     this.button2,
                                     this.button1});
       this.ResumeLayout(false);
       this.Text = "Font and Color Dialogs";
       this.button1.Text = "&Font";
       this.button2.Text = "&Color";
       this.label1.Text = "Change my FONT and COLOR!";
   }
   [STAThread]
   static void Main() {
       Application.Run(new Form1());
   }
   private void button2_Click(object sender, System.EventArgs e) {
       ColorDialog cd = new ColorDialog();
       cd.AllowFullOpen = true; 
       cd.FullOpen = true;   
       cd.Color = Color.DarkBlue; 
       //cd.Color = Color.Blue;   
       if (cd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
           this.label1.ForeColor = cd.Color;
   }
   private void button1_Click_1(object sender, System.EventArgs e) {
       FontDialog fd = new FontDialog();
       fd.ShowColor = true;
       fd.Color = Color.Blue;
       fd.ShowApply = true;
       fd.Apply += new EventHandler(ApplyFont);
       if (fd.ShowDialog() != System.Windows.Forms.DialogResult.Cancel)
           ChangeFont(fd);
   }
   private void ApplyFont(object o, EventArgs ea) {
       ChangeFont((FontDialog)o);
   }
   private void ChangeFont(FontDialog fd) {
       this.label1.Font = fd.Font;
       this.label1.ForeColor = fd.Color;
   }

}</source>

Font list form

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; using System.Drawing.Text; using System.Collections.Generic; public class FontListForm : Form {

   public FontListForm()
   {
       InitializeComponent();
   }
   private void FontListForm_Load(object sender, EventArgs e)
   {
       using (InstalledFontCollection fontFamilies = new InstalledFontCollection())
       {
           int offset = 10;
           foreach (FontFamily family in fontFamilies.Families)
           {
               try
               {
                   Label fontLabel = new Label();
                   fontLabel.Text = family.Name;
                   fontLabel.Font = new Font(family, 14);
                   fontLabel.Left = 10;
                   fontLabel.Width = pnlFonts.Width;
                   fontLabel.Top = offset;
                   pnlFonts.Controls.Add(fontLabel);
                   offset += 30;
               }catch{}
           }
       }
   }
   private System.ruponentModel.IContainer components = null;
   protected override void Dispose(bool disposing)
   {
       if (disposing && (components != null))
       {
           components.Dispose();
       }
       base.Dispose(disposing);
   }
   private void InitializeComponent()
   {
       this.pnlFonts = new System.Windows.Forms.Panel();
       this.SuspendLayout();
       this.pnlFonts.AutoScroll = true;
       this.pnlFonts.Dock = System.Windows.Forms.DockStyle.Fill;
       this.pnlFonts.Location = new System.Drawing.Point(0, 0);
       this.pnlFonts.Name = "pnlFonts";
       this.pnlFonts.Size = new System.Drawing.Size(299, 276);
       this.pnlFonts.TabIndex = 0;
       this.ClientSize = new System.Drawing.Size(299, 276);
       this.Controls.Add(this.pnlFonts);
       this.Name = "FontListForm";
       this.Text = "List of Installed Fonts";
       this.Load += new System.EventHandler(this.FontListForm_Load);
       this.ResumeLayout(false);
   }
   private System.Windows.Forms.Panel pnlFonts;
   [STAThread]
   static void Main()
   {
       Application.EnableVisualStyles();
       Application.SetCompatibleTextRenderingDefault(false);
       Application.Run(new FontListForm());
   }
   

}</source>

Font Properties

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontProperties : Form {

 private Button btnChange;
 private Label lbl;
 private FontDialog fd;
 public FontProperties()
 {
   Size = new Size(350,200);
   btnChange = new Button();
   btnChange.Location = new Point(200,50);
   btnChange.Size = new Size(100,23);
   btnChange.Text = "Change";
   btnChange.Click += new System.EventHandler(btnChange_Click);
   btnChange.Parent = this;
   lbl = new Label();
   lbl.Text = "test";
   lbl.AutoSize = true;
   lbl.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontProperties());
 }
 private void btnChange_Click(object sender, EventArgs e)
 {
   fd = new FontDialog();
   fd.ShowHelp = false;
   fd.ShowApply = true;
   fd.Apply += new System.EventHandler(this.fd_Apply);
   
   if (fd.ShowDialog() == DialogResult.OK)
     lbl.Font = fd.Font;
   MessageBox.Show("Label Font:\t" + lbl.Font.ToString() + "\n" +
     "Label Font Family:\t" + lbl.Font.FontFamily.ToString() + "\n" + 
     "Label Font Style:\t" + lbl.Font.Style.ToString() + "\n" + 
     "Label Font Unit:\t" + lbl.Font.Unit.ToString() + "\n" +
     "Label Font Height:\t" + lbl.Font.Height.ToString() + "\n",
     "Font Properties");
 }
 private void fd_Apply(object sender, System.EventArgs e)
 {
   lbl.Font = fd.Font;
 }

}</source>

List all Font Families

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontFamilies : Form {

 public FontFamilies()
 {
   Size = new Size(350,200);
   RichTextBox rtxt = new RichTextBox();
   rtxt.Multiline = true;
   rtxt.Dock = DockStyle.Fill;
   rtxt.Parent = this;
   FontFamily[] ffArray = FontFamily.Families;
   foreach( FontFamily ff in ffArray )
   {
     if (ff.IsStyleAvailable(FontStyle.Regular))
     {
       rtxt.Text += ff.Name + "\n"; 
     }
   }
 }
 static void Main() 
 {
   Application.Run(new FontFamilies());
 }

}</source>

RichTextBox: Multiline

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontConstructor1 : Form {

 public FontConstructor1()
 {
   Size = new Size(350,200);
   Font fnt = Font;
   fnt = new Font(fnt, FontStyle.Bold | FontStyle.Italic);
   Font = fnt;
   RichTextBox rtxt = new RichTextBox();
   rtxt.Text = "first line.\n" +
         "This is a second line of text.";
   rtxt.Text += "\nFont Name:\t" + Font.Name;
   rtxt.Text += "\nFont Family:\t" + Font.FontFamily;
   rtxt.Text += "\nFont Styles:\t" + Font.Style;
   rtxt.Text += "\nFont Size:\t" + Font.Size;
   rtxt.Text += "\nFont Height:\t" + Font.Height;
   rtxt.Text += "\nFont Units:\t" + Font.Unit;
   rtxt.Multiline = true;
   rtxt.Dock = DockStyle.Fill;
   rtxt.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontConstructor1());
 }

}</source>

Set the label font to a font selected from a FontDialog

<source lang="csharp">using System; using System.ruponentModel; using System.Drawing; using System.Windows.Forms; public class FontPickerDemo  : Form {

   Button b;
   Label l;
   void OnApply(Object sender,System.EventArgs e)
   {
       FontDialog dlg = (FontDialog)sender;
       l.Font=dlg.Font;
   }
   void OnClickedb(Object sender,EventArgs e)
   {
       FontDialog dlg=new FontDialog();
       dlg.Font = l.Font;
       dlg.ShowApply = true;
       dlg.Apply += new EventHandler(OnApply);
       if(dlg.ShowDialog() != DialogResult.Cancel)
       {
           l.Font = dlg.Font;
       }
   }
   public FontPickerDemo()
   {
       this.Size=new Size(416,320);
       l=new Label();
       l.Location = new Point(8,8);
       l.Size = new Size(400,200);
       l.Text = "nabcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ";
       l.Font = new Font("Microsoft Sans Serif", 18f);
       this.Controls.Add(l);
       b=new Button();
       b.Text = "Choose Font";
       b.Click += new EventHandler(OnClickedb);
       b.Location = new Point(8,250);
       b.Size = new Size(400,32);
       this.Controls.Add(b);
   }
   static void Main()
   {
       Application.Run(new FontPickerDemo());
   }

}</source>

Show Font Dialog Help

<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class FontDialogDisplayHelp : System.Windows.Forms.Form {

 private System.ruponentModel.Container components = null;
 private System.Windows.Forms.FontDialog fontDlg = new System.Windows.Forms.FontDialog();    
 private Font currFont = new Font("Times New Roman", 12);
 public FontDialogDisplayHelp()
 {
   InitializeComponent();
   fontDlg.ShowHelp = true;    
 }
 protected override void Dispose( bool disposing )
 {
   if( disposing )
   {
     if (components != null) 
     {
       components.Dispose();
     }
   }
   base.Dispose( disposing );
 }

 private void InitializeComponent()
 {
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(292, 273);
   this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.FontDialogDisplayHelp_MouseUp);
   this.Paint += new System.Windows.Forms.PaintEventHandler(this.FontDialogDisplayHelp_Paint);
 }
 [STAThread]
 static void Main() 
 {
   Application.Run(new FontDialogDisplayHelp());
 }
 private void FontDialogDisplayHelp_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
 {
   Graphics g = e.Graphics;
   g.DrawString("Testing...", currFont, new SolidBrush(Color.Black), 0, 0);  
 }
 private void FontDialogDisplayHelp_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
 {
   if (fontDlg.ShowDialog() != DialogResult.Cancel)
   {
     currFont = fontDlg.Font;
     Invalidate();
   }
 }

}</source>

Use GraphicsUnit to create font

<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FontConstructor4 : Form {

 public FontConstructor4()
 {
   Size = new Size(350,200);
   FontFamily ff = new FontFamily("Times New Roman");
   Font fnt = new Font(ff, .25f, GraphicsUnit.Inch);
   Font = fnt;
   RichTextBox rtxt = new RichTextBox();
   rtxt.Text = "first line.\n" +
         "This is a second line of text.";
   rtxt.Text += "\nFont Name:\t" + Font.Name;
   rtxt.Text += "\nFont Family:\t" + Font.FontFamily;
   rtxt.Text += "\nFont Styles:\t" + Font.Style;
   rtxt.Text += "\nFont Size:\t" + Font.Size;
   rtxt.Text += "\nFont Height:\t" + Font.Height;
   rtxt.Text += "\nFont Units:\t" + Font.Unit;
   rtxt.Multiline = true;
   rtxt.Dock = DockStyle.Fill;
   rtxt.Parent = this;
 }
 static void Main() 
 {
   Application.Run(new FontConstructor4());
 }

}</source>