Csharp/C Sharp by API/System.Windows.Forms/RichTextBox
Содержание
RichTextBox.Focus()
<source lang="csharp">
using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Windows.Forms;
class Form1 : Form {
public Form1() { InitializeComponent(); } private void buttonBold_Click(object sender, EventArgs e) { Font oldFont; Font newFont; oldFont = this.richTextBoxText.SelectionFont;
if (oldFont.Bold) newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Bold); else newFont = new Font(oldFont, oldFont.Style | FontStyle.Bold);
this.richTextBoxText.SelectionFont = newFont; this.richTextBoxText.Focus(); } private void buttonUnderline_Click(object sender, EventArgs e) { Font oldFont; Font newFont;
oldFont = this.richTextBoxText.SelectionFont; if (oldFont.Underline) newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Underline); else newFont = new Font(oldFont, oldFont.Style | FontStyle.Underline); this.richTextBoxText.SelectionFont = newFont; this.richTextBoxText.Focus(); } private void buttonItalic_Click(object sender, EventArgs e) { Font oldFont; Font newFont; oldFont = this.richTextBoxText.SelectionFont; if (oldFont.Italic) newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Italic); else newFont = new Font(oldFont, oldFont.Style | FontStyle.Italic); this.richTextBoxText.SelectionFont = newFont; this.richTextBoxText.Focus(); } private void buttonCenter_Click(object sender, EventArgs e) { if (this.richTextBoxText.SelectionAlignment == HorizontalAlignment.Center) this.richTextBoxText.SelectionAlignment = HorizontalAlignment.Left; else this.richTextBoxText.SelectionAlignment = HorizontalAlignment.Center; this.richTextBoxText.Focus(); } private void textBoxSize_KeyPress(object sender, KeyPressEventArgs e) { if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8 && e.KeyChar != 13) { e.Handled = true; } else if (e.KeyChar == 13) { TextBox txt = (TextBox)sender; if (txt.Text.Length > 0) ApplyTextSize(txt.Text); e.Handled = true; this.richTextBoxText.Focus(); } } private void textBoxSize_Validating(object sender, CancelEventArgs e) { TextBox txt = (TextBox)sender; ApplyTextSize(txt.Text); this.richTextBoxText.Focus(); } private void ApplyTextSize(string textSize) { float newSize = Convert.ToSingle(textSize); FontFamily currentFontFamily; Font newFont; currentFontFamily = this.richTextBoxText.SelectionFont.FontFamily; newFont = new Font(currentFontFamily, newSize); this.richTextBoxText.SelectionFont = newFont; } private void richTextBoxText_LinkClicked(object sender, LinkClickedEventArgs e) { System.Diagnostics.Process.Start(e.LinkText); } private void buttonLoad_Click(object sender, EventArgs e) { try { richTextBoxText.LoadFile("Test.rtf"); } catch (System.IO.FileNotFoundException) { MessageBox.Show("No file to load yet"); } } private void buttonSave_Click(object sender, EventArgs e) { try { richTextBoxText.SaveFile("Test.rtf"); } catch (System.Exception err) { MessageBox.Show(err.Message); } } private void InitializeComponent() { this.buttonBold = new System.Windows.Forms.Button(); this.buttonUnderline = new System.Windows.Forms.Button(); this.buttonItalic = new System.Windows.Forms.Button(); this.buttonCenter = new System.Windows.Forms.Button(); this.buttonSave = new System.Windows.Forms.Button(); this.buttonLoad = new System.Windows.Forms.Button(); this.labelSize = new System.Windows.Forms.Label(); this.textBoxSize = new System.Windows.Forms.TextBox(); this.richTextBoxText = new System.Windows.Forms.RichTextBox(); this.SuspendLayout(); this.buttonBold.Anchor = System.Windows.Forms.AnchorStyles.Top; this.buttonBold.Location = new System.Drawing.Point(187, 13); this.buttonBold.Margin = new System.Windows.Forms.Padding(3, 3, 3, 1); this.buttonBold.Name = "buttonBold"; this.buttonBold.Size = new System.Drawing.Size(82, 23); this.buttonBold.TabIndex = 0; this.buttonBold.Text = "Bold"; this.buttonBold.Click += new System.EventHandler(this.buttonBold_Click); this.buttonUnderline.Anchor = System.Windows.Forms.AnchorStyles.Top; this.buttonUnderline.Location = new System.Drawing.Point(276, 13); this.buttonUnderline.Margin = new System.Windows.Forms.Padding(3, 3, 3, 1); this.buttonUnderline.Name = "buttonUnderline"; this.buttonUnderline.Size = new System.Drawing.Size(82, 23); this.buttonUnderline.TabIndex = 1; this.buttonUnderline.Text = "Underline"; this.buttonUnderline.Click += new System.EventHandler(this.buttonUnderline_Click); this.buttonItalic.Anchor = System.Windows.Forms.AnchorStyles.Top; this.buttonItalic.Location = new System.Drawing.Point(365, 13); this.buttonItalic.Name = "buttonItalic"; this.buttonItalic.Size = new System.Drawing.Size(82, 23); this.buttonItalic.TabIndex = 2; this.buttonItalic.Text = "Italic"; this.buttonItalic.Click += new System.EventHandler(this.buttonItalic_Click); this.buttonCenter.Anchor = System.Windows.Forms.AnchorStyles.Top; this.buttonCenter.Location = new System.Drawing.Point(454, 13); this.buttonCenter.Margin = new System.Windows.Forms.Padding(3, 0, 3, 3); this.buttonCenter.Name = "buttonCenter"; this.buttonCenter.Size = new System.Drawing.Size(82, 23); this.buttonCenter.TabIndex = 3; this.buttonCenter.Text = "Center"; this.buttonCenter.Click += new System.EventHandler(this.buttonCenter_Click); this.buttonSave.Anchor = System.Windows.Forms.AnchorStyles.Bottom; this.buttonSave.Location = new System.Drawing.Point(365, 309); this.buttonSave.Margin = new System.Windows.Forms.Padding(3, 0, 3, 3); this.buttonSave.Name = "buttonSave"; this.buttonSave.Size = new System.Drawing.Size(82, 23); this.buttonSave.TabIndex = 4; this.buttonSave.Text = "Save"; this.buttonSave.Click += new System.EventHandler(this.buttonSave_Click); this.buttonLoad.Anchor = System.Windows.Forms.AnchorStyles.Bottom; this.buttonLoad.Location = new System.Drawing.Point(276, 309); this.buttonLoad.Name = "buttonLoad"; this.buttonLoad.Size = new System.Drawing.Size(82, 23); this.buttonLoad.TabIndex = 5; this.buttonLoad.Text = "Load"; this.buttonLoad.Click += new System.EventHandler(this.buttonLoad_Click); this.labelSize.Anchor = System.Windows.Forms.AnchorStyles.Top; this.labelSize.AutoSize = true; this.labelSize.Location = new System.Drawing.Point(295, 46); this.labelSize.Name = "labelSize"; this.labelSize.Size = new System.Drawing.Size(26, 14); this.labelSize.TabIndex = 6; this.labelSize.Text = "Size"; this.textBoxSize.Anchor = System.Windows.Forms.AnchorStyles.Top; this.textBoxSize.Location = new System.Drawing.Point(328, 43); this.textBoxSize.Name = "textBoxSize"; this.textBoxSize.TabIndex = 7; this.textBoxSize.Text = "10"; this.textBoxSize.Validating += new System.ruponentModel.CancelEventHandler(this.textBoxSize_Validating); this.textBoxSize.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBoxSize_KeyPress); this.richTextBoxText.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.richTextBoxText.Location = new System.Drawing.Point(13, 70); this.richTextBoxText.Name = "richTextBoxText"; this.richTextBoxText.Size = new System.Drawing.Size(686, 232); this.richTextBoxText.TabIndex = 8; this.richTextBoxText.Text = ""; this.richTextBoxText.LinkClicked += new System.Windows.Forms.LinkClickedEventHandler(this.richTextBoxText_LinkClicked); this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(722, 341); this.Controls.Add(this.richTextBoxText); this.Controls.Add(this.textBoxSize); this.Controls.Add(this.labelSize); this.Controls.Add(this.buttonLoad); this.Controls.Add(this.buttonSave); this.Controls.Add(this.buttonCenter); this.Controls.Add(this.buttonItalic); this.Controls.Add(this.buttonUnderline); this.Controls.Add(this.buttonBold); this.MinimumSize = new System.Drawing.Size(730, 368); this.Name = "Form1"; this.Text = "RichTextBox Test"; this.ResumeLayout(false); this.PerformLayout(); }
private System.Windows.Forms.Button buttonBold; private System.Windows.Forms.Button buttonUnderline; private System.Windows.Forms.Button buttonItalic; private System.Windows.Forms.Button buttonCenter; private System.Windows.Forms.Button buttonSave; private System.Windows.Forms.Button buttonLoad; private System.Windows.Forms.Label labelSize; private System.Windows.Forms.TextBox textBoxSize; private System.Windows.Forms.RichTextBox richTextBoxText; [STAThread] static void Main() { Application.EnableVisualStyles(); Application.Run(new Form1()); }
}
</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>
RichTextBox.SelectionChanged
<source lang="csharp">
using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; using System.Drawing.Text; public class Form1 : Form {
private System.Windows.Forms.RichTextBox richTextBox1; private System.Windows.Forms.ToolStrip toolStrip1; private System.Windows.Forms.ToolStripButton cmdUnderline; private System.Windows.Forms.ToolStripButton cmdBold; private System.Windows.Forms.ToolStripButton cmdItalic; private System.Windows.Forms.ToolStripSeparator toolStripSeparator1; private System.Windows.Forms.ToolStripDropDownButton lstColors; private System.Windows.Forms.ToolStripDropDownButton lstFonts; private System.Windows.Forms.ToolStripDropDownButton lstZoom; private System.Windows.Forms.ToolStripDropDownButton lstFontSize; private System.Windows.Forms.ToolStripSeparator toolStripSeparator2; private System.Windows.Forms.Button cmdAddImage; public Form1() { InitializeComponent(); } private void richTextBox1_SelectionChanged(object sender, EventArgs e) { if (richTextBox1.SelectionFont != null) { cmdBold.Checked = richTextBox1.SelectionFont.Bold; cmdItalic.Checked = richTextBox1.SelectionFont.Italic; cmdUnderline.Checked = richTextBox1.SelectionFont.Underline; } } private void cmdBold_Click(object sender, EventArgs e) { if (richTextBox1.SelectionFont == null) { return; } FontStyle style = richTextBox1.SelectionFont.Style; if (richTextBox1.SelectionFont.Bold) { style &= ~FontStyle.Bold; } else { style |= FontStyle.Bold; } richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style); } private void cmdItalic_Click(object sender, EventArgs e) { if (richTextBox1.SelectionFont == null) { return; } FontStyle style = richTextBox1.SelectionFont.Style; if (richTextBox1.SelectionFont.Italic) { style &= ~FontStyle.Italic; } else { style |= FontStyle.Italic; } richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style); } private void cmdUnderline_Click(object sender, EventArgs e) { if (richTextBox1.SelectionFont == null) { return; } FontStyle style = richTextBox1.SelectionFont.Style; if (richTextBox1.SelectionFont.Underline) { style &= ~FontStyle.Underline; } else { style |= FontStyle.Underline; } richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style); } private void Form1_Load(object sender, EventArgs e) { lstColors.DropDown.Items.Add("Red"); lstColors.DropDown.Items.Add("Blue"); InstalledFontCollection fonts = new InstalledFontCollection(); foreach (FontFamily family in fonts.Families) { lstFonts.DropDown.Items.Add(family.Name); } lstZoom.DropDown.Items.Add("300%"); lstZoom.DropDown.Items.Add("200%"); lstZoom.DropDown.Items.Add("100%"); lstFontSize.DropDown.Items.Add("8"); lstFontSize.DropDown.Items.Add("10"); lstFontSize.DropDown.Items.Add("12"); } private void lstColors_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { KnownColor selectedColor; selectedColor = (KnownColor)System.Enum.Parse(typeof(KnownColor), e.ClickedItem.Text); richTextBox1.SelectionColor = Color.FromKnownColor(selectedColor); } private void lstFonts_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { if (richTextBox1.SelectionFont == null) { richTextBox1.SelectionFont = new Font(e.ClickedItem.Text, richTextBox1.Font.Size); } richTextBox1.SelectionFont = new Font(e.ClickedItem.Text, richTextBox1.SelectionFont.Size); } private void lstZoom_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { float zoomPercent = Convert.ToSingle(e.ClickedItem.Text.Trim("%")); richTextBox1.ZoomFactor = zoomPercent / 100; } private void lstFontSize_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { if (richTextBox1.SelectionFont == null) { return; } richTextBox1.SelectionFont =new Font(richTextBox1.SelectionFont.FontFamily, Convert.ToInt32(e.ClickedItem.Text), richTextBox1.SelectionFont.Style); } private void cmdAddImage_Click(object sender, EventArgs e) { Image img = Image.FromFile("winter.jpg"); Clipboard.SetImage(img); richTextBox1.SelectionStart = 0; richTextBox1.Paste(); Clipboard.Clear(); } private void InitializeComponent() { this.richTextBox1 = new System.Windows.Forms.RichTextBox(); this.toolStrip1 = new System.Windows.Forms.ToolStrip(); this.cmdBold = new System.Windows.Forms.ToolStripButton(); this.cmdItalic = new System.Windows.Forms.ToolStripButton(); this.cmdUnderline = new System.Windows.Forms.ToolStripButton(); this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator(); this.lstColors = new System.Windows.Forms.ToolStripDropDownButton(); this.lstFonts = new System.Windows.Forms.ToolStripDropDownButton(); this.lstFontSize = new System.Windows.Forms.ToolStripDropDownButton(); this.toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator(); this.lstZoom = new System.Windows.Forms.ToolStripDropDownButton(); this.cmdAddImage = new System.Windows.Forms.Button(); this.toolStrip1.SuspendLayout(); this.SuspendLayout(); // // richTextBox1 // this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.richTextBox1.BulletIndent = 5; this.richTextBox1.Location = new System.Drawing.Point(12, 37); this.richTextBox1.Margin = new System.Windows.Forms.Padding(5); this.richTextBox1.Name = "richTextBox1"; this.richTextBox1.Size = new System.Drawing.Size(317, 197); this.richTextBox1.TabIndex = 0; this.richTextBox1.Text = "adfasdf"; this.richTextBox1.SelectionChanged += new System.EventHandler(this.richTextBox1_SelectionChanged); // // toolStrip1 // this.toolStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] { this.cmdBold, this.cmdItalic, this.cmdUnderline, this.toolStripSeparator1, this.lstColors, this.lstFonts, this.lstFontSize, this.toolStripSeparator2, this.lstZoom}); this.toolStrip1.Location = new System.Drawing.Point(0, 0); this.toolStrip1.Name = "toolStrip1"; this.toolStrip1.Size = new System.Drawing.Size(341, 25); this.toolStrip1.TabIndex = 1; this.toolStrip1.Text = "toolStrip1"; // // cmdBold // this.cmdBold.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.cmdBold.ImageTransparentColor = System.Drawing.Color.Magenta; this.cmdBold.Name = "cmdBold"; this.cmdBold.Size = new System.Drawing.Size(31, 22); this.cmdBold.Text = "Bold"; this.cmdBold.Click += new System.EventHandler(this.cmdBold_Click); // // cmdItalic // this.cmdItalic.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.cmdItalic.ImageTransparentColor = System.Drawing.Color.Magenta; this.cmdItalic.Name = "cmdItalic"; this.cmdItalic.Size = new System.Drawing.Size(34, 22); this.cmdItalic.Text = "Italic"; this.cmdItalic.Click += new System.EventHandler(this.cmdItalic_Click); // // cmdUnderline // this.cmdUnderline.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.cmdUnderline.ImageTransparentColor = System.Drawing.Color.Magenta; this.cmdUnderline.Name = "cmdUnderline"; this.cmdUnderline.Size = new System.Drawing.Size(56, 22); this.cmdUnderline.Text = "Underline"; this.cmdUnderline.Click += new System.EventHandler(this.cmdUnderline_Click); // // toolStripSeparator1 // this.toolStripSeparator1.Name = "toolStripSeparator1"; this.toolStripSeparator1.Size = new System.Drawing.Size(6, 25); // // lstColors // this.lstColors.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstColors.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstColors.Name = "lstColors"; this.lstColors.Size = new System.Drawing.Size(45, 22); this.lstColors.Text = "Color"; this.lstColors.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstColors_DropDownItemClicked); // // lstFonts // this.lstFonts.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstFonts.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstFonts.Name = "lstFonts"; this.lstFonts.Size = new System.Drawing.Size(42, 22); this.lstFonts.Text = "Font"; this.lstFonts.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstFonts_DropDownItemClicked); // // lstFontSize // this.lstFontSize.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstFontSize.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstFontSize.Name = "lstFontSize"; this.lstFontSize.Size = new System.Drawing.Size(39, 22); this.lstFontSize.Text = "Size"; this.lstFontSize.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstFontSize_DropDownItemClicked); // // toolStripSeparator2 // this.toolStripSeparator2.Name = "toolStripSeparator2"; this.toolStripSeparator2.Size = new System.Drawing.Size(6, 25); // // lstZoom // this.lstZoom.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstZoom.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstZoom.Name = "lstZoom"; this.lstZoom.Size = new System.Drawing.Size(46, 22); this.lstZoom.Text = "Zoom"; this.lstZoom.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstZoom_DropDownItemClicked); // // cmdAddImage // this.cmdAddImage.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.cmdAddImage.Location = new System.Drawing.Point(12, 237); this.cmdAddImage.Name = "cmdAddImage"; this.cmdAddImage.Size = new System.Drawing.Size(154, 23); this.cmdAddImage.TabIndex = 2; this.cmdAddImage.Text = "Insert Image"; this.cmdAddImage.UseVisualStyleBackColor = true; this.cmdAddImage.Click += new System.EventHandler(this.cmdAddImage_Click); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(341, 266); this.Controls.Add(this.cmdAddImage); this.Controls.Add(this.toolStrip1); this.Controls.Add(this.richTextBox1); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Name = "Form1"; this.Text = "RichTextBox Test"; this.Load += new System.EventHandler(this.Form1_Load); this.toolStrip1.ResumeLayout(false); this.toolStrip1.PerformLayout(); this.ResumeLayout(false); this.PerformLayout(); } [STAThread] static void Main() { Application.EnableVisualStyles(); Application.Run(new Form1()); }
}
</source>
RichTextBox.SelectionFont
<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; using System.Drawing.Text; public class Form1 : Form {
private System.Windows.Forms.RichTextBox richTextBox1; private System.Windows.Forms.ToolStrip toolStrip1; private System.Windows.Forms.ToolStripButton cmdUnderline; private System.Windows.Forms.ToolStripButton cmdBold; private System.Windows.Forms.ToolStripButton cmdItalic; private System.Windows.Forms.ToolStripSeparator toolStripSeparator1; private System.Windows.Forms.ToolStripDropDownButton lstColors; private System.Windows.Forms.ToolStripDropDownButton lstFonts; private System.Windows.Forms.ToolStripDropDownButton lstZoom; private System.Windows.Forms.ToolStripDropDownButton lstFontSize; private System.Windows.Forms.ToolStripSeparator toolStripSeparator2; private System.Windows.Forms.Button cmdAddImage; public Form1() { InitializeComponent(); } private void richTextBox1_SelectionChanged(object sender, EventArgs e) { if (richTextBox1.SelectionFont != null) { cmdBold.Checked = richTextBox1.SelectionFont.Bold; cmdItalic.Checked = richTextBox1.SelectionFont.Italic; cmdUnderline.Checked = richTextBox1.SelectionFont.Underline; } } private void cmdBold_Click(object sender, EventArgs e) { if (richTextBox1.SelectionFont == null) { return; } FontStyle style = richTextBox1.SelectionFont.Style; if (richTextBox1.SelectionFont.Bold) { style &= ~FontStyle.Bold; } else { style |= FontStyle.Bold; } richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style); } private void cmdItalic_Click(object sender, EventArgs e) { if (richTextBox1.SelectionFont == null) { return; } FontStyle style = richTextBox1.SelectionFont.Style; if (richTextBox1.SelectionFont.Italic) { style &= ~FontStyle.Italic; } else { style |= FontStyle.Italic; } richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style); } private void cmdUnderline_Click(object sender, EventArgs e) { if (richTextBox1.SelectionFont == null) { return; } FontStyle style = richTextBox1.SelectionFont.Style; if (richTextBox1.SelectionFont.Underline) { style &= ~FontStyle.Underline; } else { style |= FontStyle.Underline; } richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style); } private void Form1_Load(object sender, EventArgs e) { lstColors.DropDown.Items.Add("Red"); lstColors.DropDown.Items.Add("Blue"); InstalledFontCollection fonts = new InstalledFontCollection(); foreach (FontFamily family in fonts.Families) { lstFonts.DropDown.Items.Add(family.Name); } lstZoom.DropDown.Items.Add("300%"); lstZoom.DropDown.Items.Add("200%"); lstZoom.DropDown.Items.Add("100%"); lstFontSize.DropDown.Items.Add("8"); lstFontSize.DropDown.Items.Add("10"); lstFontSize.DropDown.Items.Add("12"); } private void lstColors_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { KnownColor selectedColor; selectedColor = (KnownColor)System.Enum.Parse(typeof(KnownColor), e.ClickedItem.Text); richTextBox1.SelectionColor = Color.FromKnownColor(selectedColor); } private void lstFonts_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { if (richTextBox1.SelectionFont == null) { richTextBox1.SelectionFont = new Font(e.ClickedItem.Text, richTextBox1.Font.Size); } richTextBox1.SelectionFont = new Font(e.ClickedItem.Text, richTextBox1.SelectionFont.Size); } private void lstZoom_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { float zoomPercent = Convert.ToSingle(e.ClickedItem.Text.Trim("%")); richTextBox1.ZoomFactor = zoomPercent / 100; } private void lstFontSize_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e) { if (richTextBox1.SelectionFont == null) { return; } richTextBox1.SelectionFont =new Font(richTextBox1.SelectionFont.FontFamily, Convert.ToInt32(e.ClickedItem.Text), richTextBox1.SelectionFont.Style); } private void cmdAddImage_Click(object sender, EventArgs e) { Image img = Image.FromFile("winter.jpg"); Clipboard.SetImage(img); richTextBox1.SelectionStart = 0; richTextBox1.Paste(); Clipboard.Clear(); } private void InitializeComponent() { this.richTextBox1 = new System.Windows.Forms.RichTextBox(); this.toolStrip1 = new System.Windows.Forms.ToolStrip(); this.cmdBold = new System.Windows.Forms.ToolStripButton(); this.cmdItalic = new System.Windows.Forms.ToolStripButton(); this.cmdUnderline = new System.Windows.Forms.ToolStripButton(); this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator(); this.lstColors = new System.Windows.Forms.ToolStripDropDownButton(); this.lstFonts = new System.Windows.Forms.ToolStripDropDownButton(); this.lstFontSize = new System.Windows.Forms.ToolStripDropDownButton(); this.toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator(); this.lstZoom = new System.Windows.Forms.ToolStripDropDownButton(); this.cmdAddImage = new System.Windows.Forms.Button(); this.toolStrip1.SuspendLayout(); this.SuspendLayout(); // // richTextBox1 // this.richTextBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.richTextBox1.BulletIndent = 5; this.richTextBox1.Location = new System.Drawing.Point(12, 37); this.richTextBox1.Margin = new System.Windows.Forms.Padding(5); this.richTextBox1.Name = "richTextBox1"; this.richTextBox1.Size = new System.Drawing.Size(317, 197); this.richTextBox1.TabIndex = 0; this.richTextBox1.Text = "adfasdf"; this.richTextBox1.SelectionChanged += new System.EventHandler(this.richTextBox1_SelectionChanged); // // toolStrip1 // this.toolStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] { this.cmdBold, this.cmdItalic, this.cmdUnderline, this.toolStripSeparator1, this.lstColors, this.lstFonts, this.lstFontSize, this.toolStripSeparator2, this.lstZoom}); this.toolStrip1.Location = new System.Drawing.Point(0, 0); this.toolStrip1.Name = "toolStrip1"; this.toolStrip1.Size = new System.Drawing.Size(341, 25); this.toolStrip1.TabIndex = 1; this.toolStrip1.Text = "toolStrip1"; // // cmdBold // this.cmdBold.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.cmdBold.ImageTransparentColor = System.Drawing.Color.Magenta; this.cmdBold.Name = "cmdBold"; this.cmdBold.Size = new System.Drawing.Size(31, 22); this.cmdBold.Text = "Bold"; this.cmdBold.Click += new System.EventHandler(this.cmdBold_Click); // // cmdItalic // this.cmdItalic.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.cmdItalic.ImageTransparentColor = System.Drawing.Color.Magenta; this.cmdItalic.Name = "cmdItalic"; this.cmdItalic.Size = new System.Drawing.Size(34, 22); this.cmdItalic.Text = "Italic"; this.cmdItalic.Click += new System.EventHandler(this.cmdItalic_Click); // // cmdUnderline // this.cmdUnderline.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.cmdUnderline.ImageTransparentColor = System.Drawing.Color.Magenta; this.cmdUnderline.Name = "cmdUnderline"; this.cmdUnderline.Size = new System.Drawing.Size(56, 22); this.cmdUnderline.Text = "Underline"; this.cmdUnderline.Click += new System.EventHandler(this.cmdUnderline_Click); // // toolStripSeparator1 // this.toolStripSeparator1.Name = "toolStripSeparator1"; this.toolStripSeparator1.Size = new System.Drawing.Size(6, 25); // // lstColors // this.lstColors.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstColors.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstColors.Name = "lstColors"; this.lstColors.Size = new System.Drawing.Size(45, 22); this.lstColors.Text = "Color"; this.lstColors.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstColors_DropDownItemClicked); // // lstFonts // this.lstFonts.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstFonts.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstFonts.Name = "lstFonts"; this.lstFonts.Size = new System.Drawing.Size(42, 22); this.lstFonts.Text = "Font"; this.lstFonts.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstFonts_DropDownItemClicked); // // lstFontSize // this.lstFontSize.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstFontSize.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstFontSize.Name = "lstFontSize"; this.lstFontSize.Size = new System.Drawing.Size(39, 22); this.lstFontSize.Text = "Size"; this.lstFontSize.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstFontSize_DropDownItemClicked); // // toolStripSeparator2 // this.toolStripSeparator2.Name = "toolStripSeparator2"; this.toolStripSeparator2.Size = new System.Drawing.Size(6, 25); // // lstZoom // this.lstZoom.DisplayStyle = System.Windows.Forms.ToolStripItemDisplayStyle.Text; this.lstZoom.ImageTransparentColor = System.Drawing.Color.Magenta; this.lstZoom.Name = "lstZoom"; this.lstZoom.Size = new System.Drawing.Size(46, 22); this.lstZoom.Text = "Zoom"; this.lstZoom.DropDownItemClicked += new System.Windows.Forms.ToolStripItemClickedEventHandler(this.lstZoom_DropDownItemClicked); // // cmdAddImage // this.cmdAddImage.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.cmdAddImage.Location = new System.Drawing.Point(12, 237); this.cmdAddImage.Name = "cmdAddImage"; this.cmdAddImage.Size = new System.Drawing.Size(154, 23); this.cmdAddImage.TabIndex = 2; this.cmdAddImage.Text = "Insert Image"; this.cmdAddImage.UseVisualStyleBackColor = true; this.cmdAddImage.Click += new System.EventHandler(this.cmdAddImage_Click); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(341, 266); this.Controls.Add(this.cmdAddImage); this.Controls.Add(this.toolStrip1); this.Controls.Add(this.richTextBox1); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Name = "Form1"; this.Text = "RichTextBox Test"; this.Load += new System.EventHandler(this.Form1_Load); this.toolStrip1.ResumeLayout(false); this.toolStrip1.PerformLayout(); this.ResumeLayout(false); this.PerformLayout(); } [STAThread] static void Main() { Application.EnableVisualStyles(); Application.Run(new Form1()); }
}
</source>
RichTextBox.SelectionLength
<source lang="csharp"> using System; using System.Drawing; using System.Windows.Forms; using System.IO; public class RichTextBoxes : Form {
RichTextBox rtxt; public RichTextBoxes() { Size = new Size(400, 500); rtxt = new RichTextBox(); rtxt.Parent = this; rtxt.Text = "Enter text here."; rtxt.Multiline = true; rtxt.BorderStyle = BorderStyle.Fixed3D; rtxt.ScrollBars = RichTextBoxScrollBars.ForcedBoth; rtxt.Dock = DockStyle.Fill; rtxt.DetectUrls = true; rtxt.AutoWordSelection = true; rtxt.BulletIndent = 10; rtxt.ShowSelectionMargin = true; MenuItem mnuImport = new MenuItem("&Import",new EventHandler(mnuImport_Click)); MenuItem mnuFile = new MenuItem("&File",new MenuItem[] {mnuImport}); MenuItem mnuDash1 = new MenuItem("-"); MenuItem mnuDash2 = new MenuItem("-"); MenuItem mnuUndo = new MenuItem("&Undo",new EventHandler(mnuUndo_Click),Shortcut.CtrlZ); MenuItem mnuCut = new MenuItem("Cu&t", new EventHandler(mnuCut_Click), Shortcut.CtrlX); MenuItem mnuCopy = new MenuItem("&Copy",new EventHandler(mnuCopy_Click),Shortcut.CtrlC); MenuItem mnuCopyRtf = new MenuItem("Copy &Rtf", new EventHandler(mnuCopyRtf_Click)); MenuItem mnuPaste = new MenuItem("&Paste",new EventHandler(mnuPaste_Click),Shortcut.CtrlV); MenuItem mnuDelete = new MenuItem("&Delete",new EventHandler(mnuDelete_Click)); MenuItem mnuSelectAll = new MenuItem("Select &All", new EventHandler(mnuSelectAll_Click),Shortcut.CtrlA); MenuItem mnuSelect5 = new MenuItem("Select First &5",new EventHandler(mnuSelect5_Click),Shortcut.Ctrl5); MenuItem mnuClear = new MenuItem("Clea&r",new EventHandler(mnuClear_Click)); MenuItem mnuEdit = new MenuItem("&Edit",new MenuItem[] {mnuUndo, mnuDash1, mnuCut, mnuCopy, mnuCopyRtf, mnuPaste, mnuDelete, mnuDash2, mnuSelectAll, mnuSelect5, mnuClear}); MenuItem mnuScrollToCaret = new MenuItem("&Scroll to Caret",new EventHandler(mnuScrollToCaret_Click)); MenuItem mnuView = new MenuItem("&View",new MenuItem[] {mnuScrollToCaret}); MenuItem mnuAlignLeft = new MenuItem("Align&Left",new EventHandler(mnuAlignLeft_Click)); MenuItem mnuAlignRight = new MenuItem("Align&Right",new EventHandler(mnuAlignRight_Click)); MenuItem mnuAlignCenter = new MenuItem("Align&Center",new EventHandler(mnuAlignCenter_Click)); MenuItem mnuBullet = new MenuItem("&Bullet",new EventHandler(mnuBullet_Click)); MenuItem mnuAlign = new MenuItem("&Align",new MenuItem[] {mnuAlignLeft, mnuAlignRight, mnuAlignCenter}); MenuItem mnuRed = new MenuItem("&Red",new EventHandler(mnuRed_Click)); MenuItem mnuBold = new MenuItem("Bo&ld",new EventHandler(mnuBold_Click)); MenuItem mnuHang = new MenuItem("&Hanging Indent",new EventHandler(mnuHang_Click)); MenuItem mnuIndent = new MenuItem("&Indent",new EventHandler(mnuIndent_Click)); MenuItem mnuRightIndent = new MenuItem("&Right Indent", new EventHandler(mnuRightIndent_Click)); MenuItem mnuFormat = new MenuItem("For&mat",new MenuItem[] {mnuBullet, mnuAlign, mnuRed, mnuBold, mnuHang, mnuIndent, mnuRightIndent}); Menu = new MainMenu(new MenuItem[] {mnuFile, mnuEdit, mnuView, mnuFormat}); } static void Main() { Application.Run(new RichTextBoxes()); } private void mnuImport_Click(object sender, EventArgs e) { OpenFileDialog ofd = new OpenFileDialog(); ofd.InitialDirectory = @"c:\"; ofd.Filter = "RTF files (*.rtf)|*.rtf|" + "All files (*.*)|*.*"; ofd.FilterIndex = 1; // 1 based index if (ofd.ShowDialog() == DialogResult.OK) { try { StreamReader reader = new StreamReader(ofd.FileName); rtxt.Rtf = reader.ReadToEnd(); reader.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message); return; } } } private void mnuUndo_Click(object sender, EventArgs e) { if (rtxt.CanUndo == true) { rtxt.Undo(); rtxt.ClearUndo(); } } private void mnuCut_Click(object sender, EventArgs e) { if (rtxt.SelectedText != "") rtxt.Cut(); } private void mnuCopy_Click(object sender, EventArgs e) { if (rtxt.SelectionLength > 0) rtxt.Copy(); } private void mnuCopyRtf_Click(object sender, EventArgs e) { if (rtxt.SelectionLength > 0) { Clipboard.SetDataObject(rtxt.SelectedRtf); } } private void mnuPaste_Click(object sender, EventArgs e) { if (Clipboard.GetDataObject().GetDataPresent(DataFormats.Text) == true) { if (rtxt.CanUndo == true) { if (rtxt.SelectionLength > 0) { if (MessageBox.Show( "Do you want to overwrite the currently selected text?", "Cut & Paste", MessageBoxButtons.YesNo) == DialogResult.No) rtxt.SelectionStart = rtxt.SelectionStart + rtxt.SelectionLength; } rtxt.Paste(); } } } private void mnuDelete_Click(object sender, EventArgs e) { if (rtxt.SelectionLength > 0) rtxt.SelectedText = ""; } private void mnuClear_Click(object sender, EventArgs e) { rtxt.Clear(); }
private void mnuSelect5_Click(object sender, EventArgs e) { if (rtxt.Text.Length >= 5) { rtxt.Select(0,5); } else { rtxt.Select(0,rtxt.Text.Length); } } private void mnuSelectAll_Click(object sender, EventArgs e) { rtxt.SelectAll(); } private void mnuScrollToCaret_Click(object sender, EventArgs e) { rtxt.ScrollToCaret(); } private void mnuBullet_Click(object sender, EventArgs e) { rtxt.SelectionBullet = !rtxt.SelectionBullet; } private void mnuAlignLeft_Click(object sender, EventArgs e) { rtxt.SelectionAlignment = HorizontalAlignment.Left; } private void mnuAlignRight_Click(object sender, EventArgs e) { rtxt.SelectionAlignment = HorizontalAlignment.Right; } private void mnuAlignCenter_Click(object sender, EventArgs e) { rtxt.SelectionAlignment = HorizontalAlignment.Center; } private void mnuRed_Click(object sender, EventArgs e) { if (rtxt.SelectionColor == Color.Red) rtxt.SelectionColor = Color.Black; else rtxt.SelectionColor = Color.Red; } private void mnuBold_Click(object sender, EventArgs e) { if (rtxt.SelectionFont.Bold ) rtxt.SelectionFont = new Font(rtxt.SelectionFont, FontStyle.Regular); else rtxt.SelectionFont = new Font(rtxt.SelectionFont, FontStyle.Bold); } private void mnuHang_Click(object sender, EventArgs e) { if (rtxt.SelectionHangingIndent == 10 ) rtxt.SelectionHangingIndent = 0; else rtxt.SelectionHangingIndent = 10; } private void mnuIndent_Click(object sender, EventArgs e) { if (rtxt.SelectionIndent == 10 ) rtxt.SelectionIndent = 0; else rtxt.SelectionIndent = 10; } private void mnuRightIndent_Click(object sender, EventArgs e) { if (rtxt.SelectionRightIndent == 50 ) rtxt.SelectionRightIndent = 0; else rtxt.SelectionRightIndent = 50; }
}
</source>