[C#][SAMPLE][CODE][Control]RichTextBox以及相关常见属性

[示例出处]：本示例来自《C#入门经典》第三版中文版，P355-P360
[示例涉及]：
1、RichTextBox以及相关常见属性
[示例代码]：2文件(其余默认)

Form1.Designer.cs

  1 namespace  WA_RichTextBoxTest
  2 {
  3    partial class Form1
  4    {
  5        /**//// <summary>
  6        /// 必需的设计器变量。
  7        /// </summary>
  8        private System.ComponentModel.IContainer components = null;
  9
 10        /**//// <summary>
 11        /// 清理所有正在使用的资源。
 12        /// </summary>
 13        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
 14        protected override void Dispose(bool disposing)
 15        {
 16            if (disposing && (components != null))
 17            {
 18                components.Dispose();
 19            }
 20            base.Dispose(disposing);
 21        }
 22
 23        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
 24
 25        /**//// <summary>
 26        /// 设计器支持所需的方法 - 不要
 27        /// 使用代码编辑器修改此方法的内容。
 28        /// </summary>
 29        private void InitializeComponent()
 30        {
 31            this.buttonBold = new System.Windows.Forms.Button();
 32            this.buttonUnderline = new System.Windows.Forms.Button();
 33            this.buttonItalic = new System.Windows.Forms.Button();
 34            this.buttonCenter = new System.Windows.Forms.Button();
 35            this.richTextBoxText = new System.Windows.Forms.RichTextBox();
 36            this.textBoxSize = new System.Windows.Forms.TextBox();
 37            this.labelSize = new System.Windows.Forms.Label();
 38            this.buttonLoad = new System.Windows.Forms.Button();
 39            this.buttonSave = new System.Windows.Forms.Button();
 40            this.SuspendLayout();
 41            // 
 42            // buttonBold
 43            // 
 44            this.buttonBold.Anchor = System.Windows.Forms.AnchorStyles.Top;
 45            this.buttonBold.Location = new System.Drawing.Point(12, 12);
 46            this.buttonBold.Name = "buttonBold";
 47            this.buttonBold.Size = new System.Drawing.Size(116, 23);
 48            this.buttonBold.TabIndex = 0;
 49            this.buttonBold.Text = "buttonBold";
 50            this.buttonBold.UseVisualStyleBackColor = true;
 51            this.buttonBold.Click += new System.EventHandler(this.buttonBold_Click);
 52            // 
 53            // buttonUnderline
 54            // 
 55            this.buttonUnderline.Anchor = System.Windows.Forms.AnchorStyles.Top;
 56            this.buttonUnderline.Location = new System.Drawing.Point(174, 12);
 57            this.buttonUnderline.Name = "buttonUnderline";
 58            this.buttonUnderline.Size = new System.Drawing.Size(116, 23);
 59            this.buttonUnderline.TabIndex = 1;
 60            this.buttonUnderline.Text = "buttonUnderline";
 61            this.buttonUnderline.UseVisualStyleBackColor = true;
 62            this.buttonUnderline.Click += new System.EventHandler(this.buttonUnderline_Click);
 63            // 
 64            // buttonItalic
 65            // 
 66            this.buttonItalic.Anchor = System.Windows.Forms.AnchorStyles.Top;
 67            this.buttonItalic.Location = new System.Drawing.Point(336, 12);
 68            this.buttonItalic.Name = "buttonItalic";
 69            this.buttonItalic.Size = new System.Drawing.Size(116, 23);
 70            this.buttonItalic.TabIndex = 2;
 71            this.buttonItalic.Text = "buttonItalic";
 72            this.buttonItalic.UseVisualStyleBackColor = true;
 73            this.buttonItalic.Click += new System.EventHandler(this.buttonItalic_Click);
 74            // 
 75            // buttonCenter
 76            // 
 77            this.buttonCenter.Anchor = System.Windows.Forms.AnchorStyles.Top;
 78            this.buttonCenter.Location = new System.Drawing.Point(498, 12);
 79            this.buttonCenter.Name = "buttonCenter";
 80            this.buttonCenter.Size = new System.Drawing.Size(116, 23);
 81            this.buttonCenter.TabIndex = 3;
 82            this.buttonCenter.Text = "buttonCenter";
 83            this.buttonCenter.UseVisualStyleBackColor = true;
 84            this.buttonCenter.Click += new System.EventHandler(this.buttonCenter_Click);
 85            // 
 86            // richTextBoxText
 87            // 
 88            this.richTextBoxText.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
 89                        | System.Windows.Forms.AnchorStyles.Left)
 90                        | System.Windows.Forms.AnchorStyles.Right)));
 91            this.richTextBoxText.Location = new System.Drawing.Point(12, 70);
 92            this.richTextBoxText.Name = "richTextBoxText";
 93            this.richTextBoxText.Size = new System.Drawing.Size(604, 185);
 94            this.richTextBoxText.TabIndex = 4;
 95            this.richTextBoxText.Text = "";
 96            this.richTextBoxText.LinkClicked += new System.Windows.Forms.LinkClickedEventHandler(this.richTextBoxText_LinkClicked);
 97            // 
 98            // textBoxSize
 99            // 
100            this.textBoxSize.Anchor = System.Windows.Forms.AnchorStyles.Top;
101            this.textBoxSize.Location = new System.Drawing.Point(288, 41);
102            this.textBoxSize.Name = "textBoxSize";
103            this.textBoxSize.Size = new System.Drawing.Size(148, 21);
104            this.textBoxSize.TabIndex = 5;
105            this.textBoxSize.Text = "10";
106            this.textBoxSize.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
107            this.textBoxSize.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBoxSize_KeyPress);
108            this.textBoxSize.Validating += new System.ComponentModel.CancelEventHandler(this.textBoxSize_Validating);
109            // 
110            // labelSize
111            // 
112            this.labelSize.Anchor = System.Windows.Forms.AnchorStyles.Top;
113            this.labelSize.AutoSize = true;
114            this.labelSize.Location = new System.Drawing.Point(203, 44);
115            this.labelSize.Name = "labelSize";
116            this.labelSize.Size = new System.Drawing.Size(59, 12);
117            this.labelSize.TabIndex = 6;
118            this.labelSize.Text = "labelSize";
119            // 
120            // buttonLoad
121            // 
122            this.buttonLoad.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
123            this.buttonLoad.Location = new System.Drawing.Point(174, 266);
124            this.buttonLoad.Name = "buttonLoad";
125            this.buttonLoad.Size = new System.Drawing.Size(116, 23);
126            this.buttonLoad.TabIndex = 7;
127            this.buttonLoad.Text = "buttonLoad";
128            this.buttonLoad.UseVisualStyleBackColor = true;
129            this.buttonLoad.Click += new System.EventHandler(this.buttonLoad_Click);
130            // 
131            // buttonSave
132            // 
133            this.buttonSave.Anchor = System.Windows.Forms.AnchorStyles.Bottom;
134            this.buttonSave.Location = new System.Drawing.Point(336, 266);
135            this.buttonSave.Name = "buttonSave";
136            this.buttonSave.Size = new System.Drawing.Size(116, 23);
137            this.buttonSave.TabIndex = 8;
138            this.buttonSave.Text = "buttonSave";
139            this.buttonSave.UseVisualStyleBackColor = true;
140            this.buttonSave.Click += new System.EventHandler(this.buttonSave_Click);
141            // 
142            // Form1
143            // 
144            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
145            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
146            this.ClientSize = new System.Drawing.Size(628, 295);
147            this.Controls.Add(this.buttonSave);
148            this.Controls.Add(this.buttonLoad);
149            this.Controls.Add(this.labelSize);
150            this.Controls.Add(this.textBoxSize);
151            this.Controls.Add(this.richTextBoxText);
152            this.Controls.Add(this.buttonCenter);
153            this.Controls.Add(this.buttonItalic);
154            this.Controls.Add(this.buttonUnderline);
155            this.Controls.Add(this.buttonBold);
156            this.MinimumSize = new System.Drawing.Size(636, 329);
157            this.Name = "Form1";
158            this.Text = "Form1";
159            this.DragDrop += new System.Windows.Forms.DragEventHandler(this.Form1_DragDrop);
160            this.DragEnter += new System.Windows.Forms.DragEventHandler(this.Form1_DragEnter);
161            this.ResumeLayout(false);
162            this.PerformLayout();
163
164        }
165
166        #endregion
167
168        private System.Windows.Forms.Button buttonBold;
169        private System.Windows.Forms.Button buttonUnderline;
170        private System.Windows.Forms.Button buttonItalic;
171        private System.Windows.Forms.Button buttonCenter;
172        private System.Windows.Forms.RichTextBox richTextBoxText;
173        private System.Windows.Forms.TextBox textBoxSize;
174        private System.Windows.Forms.Label labelSize;
175        private System.Windows.Forms.Button buttonLoad;
176        private System.Windows.Forms.Button buttonSave;
177    }
178}
179
180

Form1.cs

  1 using  System;
  2 using  System.Collections.Generic;
  3 using  System.ComponentModel;
  4 using  System.Data;
  5 using  System.Drawing;
  6 using  System.Text;
  7 using  System.Windows.Forms;
  8
  9 namespace  WA_RichTextBoxTest
 10 {
 11    public partial class Form1 : Form
 12    {
 13        public Form1()
 14        {
 15            InitializeComponent();
 16        }
 17
 18        private void buttonBold_Click(object sender, EventArgs e)
 19        {
 20            Font oldFont;
 21            Font newFont;
 22
 23            //获取选定字的字体
 24            oldFont = this.richTextBoxText.SelectionFont;
 25
 26            //如果字体是粗体，我们就将它的粗体格式移除
 27            if (oldFont.Bold)
 28                newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Bold);
 29            else
 30                newFont = new Font(oldFont, oldFont.Style | FontStyle.Bold);
 31
 32            //插入新字体并对RichTextBoxText设置输入焦点
 33            this.richTextBoxText.SelectionFont = newFont;
 34            this.richTextBoxText.Focus();
 35        }
 36
 37        private void buttonUnderline_Click(object sender, EventArgs e)
 38        {
 39            Font oldFont;
 40            Font newFont;
 41
 42            //获取选定字的字体
 43            oldFont = this.richTextBoxText.SelectionFont;
 44
 45            //如果有下划线，我们就将它的下划线格式移除
 46            if (oldFont.Underline)
 47                newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Underline);
 48            else
 49                newFont = new Font(oldFont, oldFont.Style | FontStyle.Underline);
 50
 51            //插入新字体并对RichTextBoxText设置输入焦点
 52            this.richTextBoxText.SelectionFont = newFont;
 53            this.richTextBoxText.Focus();
 54        }
 55
 56        private void buttonItalic_Click(object sender, EventArgs e)
 57        {
 58            Font oldFont;
 59            Font newFont;
 60
 61            //获取选定字的字体
 62            oldFont = this.richTextBoxText.SelectionFont;
 63
 64            //如果字体是斜体，我们就将它的斜体格式移除
 65            if (oldFont.Italic)
 66                newFont = new Font(oldFont, oldFont.Style & ~FontStyle.Italic);
 67            else
 68                newFont = new Font(oldFont, oldFont.Style | FontStyle.Italic);
 69
 70            //插入新字体并对RichTextBoxText设置输入焦点
 71            this.richTextBoxText.SelectionFont = newFont;
 72            this.richTextBoxText.Focus();
 73        }
 74
 75        private void buttonCenter_Click(object sender, EventArgs e)
 76        {
 77            if (this.richTextBoxText.SelectionAlignment == HorizontalAlignment.Center)
 78                this.richTextBoxText.SelectionAlignment = HorizontalAlignment.Left;
 79            else
 80                this.richTextBoxText.SelectionAlignment = HorizontalAlignment.Center;
 81
 82            this.richTextBoxText.Focus();
 83        }
 84
 85        private void textBoxSize_KeyPress(object sender, KeyPressEventArgs e)
 86        {
 87            //移除所有的非数字，退格，回车字符
 88            if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8 && e.KeyChar != 13)
 89                e.Handled = true;
 90            else if (e.KeyChar == 13)
 91            { 
 92                //如果用户键入回车就设置字号
 93                TextBox txt = (TextBox)sender;
 94
 95                if (txt.Text.Length > 0)
 96                    ApplyTextSize(txt.Text);
 97                e.Handled = true;
 98                this.richTextBoxText.Focus();
 99            }
100        }
101
102        private void textBoxSize_Validating(object sender, CancelEventArgs e)
103        {
104            TextBox txt = (TextBox)sender;
105            ApplyTextSize(txt.Text);
106            this.richTextBoxText.Focus();
107        }
108
109        private void ApplyTextSize(string textSize)
110        { 
111            //因为我们将需要一个浮点型，所以我们转换text到float
112            float newSize = Convert.ToSingle(textSize);
113            FontFamily currentFontFamily;
114            Font newFont;
115
116            //创建一个新的字体其他的family属性相同，除了新的尺寸
117            currentFontFamily = this.richTextBoxText.SelectionFont.FontFamily;
118            newFont = new Font(currentFontFamily, newSize);
119
120            //设置选择文字的字号
121            this.richTextBoxText.SelectionFont = newFont;
122        }
123
124        private void richTextBoxText_LinkClicked(object sender, LinkClickedEventArgs e)
125        {
126            System.Diagnostics.Process.Start(e.LinkText);
127        }
128
129        private void buttonLoad_Click(object sender, EventArgs e)
130        {
131            //将文件载入到RichTextBox中
132            try
133            {
134                richTextBoxText.LoadFile("Test.rtf");
135            }
136            catch (System.IO.FileNotFoundException)
137            {
138                MessageBox.Show("文件不存在！");
139            }
140        }
141
142        private void buttonSave_Click(object sender, EventArgs e)
143        {
144            //保存文件
145            try
146            {
147                richTextBoxText.SaveFile("Test.rtf");
148            }
149            catch (System.Exception err)
150            {
151                MessageBox.Show(err.Message);
152            }
153        }
154
155        private void Form1_DragDrop(object sender, DragEventArgs e)
156        {
157            buttonSave_Click(sender, e);
158        }
159
160        private void Form1_DragEnter(object sender, DragEventArgs e)
161        {
162            this.Focus();
163        }
164    }
165}

[示例说明]：
1、开发语言：C#
2、开发环境：Visual Studio.Net 2005 Team suite
3、开发模板：C#.net项目->Windows应用程序