C#剪贴板循环使用功能实现

using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;namespace Text{/// <summary>/// Form1 的摘要说明。/// </summary>public class Form1 : System.Windows.Forms.Form{private System.Windows.Forms.OpenFileDialog openFileDialog1;private System.Windows.Forms.RichTextBox richTextBox1;private System.Windows.Forms.Button button1;private System.Windows.Forms.Button button2;private System.Windows.Forms.Button button3;private System.Windows.Forms.Button button4;private System.Windows.Forms.ContextMenu contextMenu1;//存放剪贴板循环的内容private string[] MyClipBoardText=new string[]{"","","","","","","","","",""};private System.Windows.Forms.Button button5;/// <summary>/// 必需的设计器变量。/// </summary>private System.ComponentModel.Container components = null;public Form1(){//// Windows 窗体设计器支持所必需的//InitializeComponent();//// TODO: 在 InitializeComponent 调用后添加任何构造函数代码//}/// <summary>/// 清理所有正在使用的资源。/// </summary>protected override void Dispose( bool disposing ){if( disposing ){if (components != null) {components.Dispose();}}base.Dispose( disposing );}#region Windows 窗体设计器生成的代码/// <summary>/// 设计器支持所需的方法 - 不要使用代码编辑器修改/// 此方法的内容。/// </summary>private void InitializeComponent(){this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();this.richTextBox1 = new System.Windows.Forms.RichTextBox();this.button1 = new System.Windows.Forms.Button();this.button2 = new System.Windows.Forms.Button();this.button3 = new System.Windows.Forms.Button();this.button4 = new System.Windows.Forms.Button();this.contextMenu1 = new System.Windows.Forms.ContextMenu();this.button5 = new System.Windows.Forms.Button();this.SuspendLayout();// // openFileDialog1// this.openFileDialog1.Filter = "所有文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";// // richTextBox1// this.richTextBox1.Location = new System.Drawing.Point(8, 40);this.richTextBox1.Name = "richTextBox1";this.richTextBox1.Size = new System.Drawing.Size(320, 184);this.richTextBox1.TabIndex = 2;this.richTextBox1.Text = "";// // button1// this.button1.Location = new System.Drawing.Point(8, 8);this.button1.Name = "button1";this.button1.Size = new System.Drawing.Size(64, 23);this.button1.TabIndex = 3;this.button1.Text = "浏览文件";this.button1.Click = new System.EventHandler(this.button1_Click);// // button2// this.button2.Location = new System.Drawing.Point(136, 8);this.button2.Name = "button2";this.button2.Size = new System.Drawing.Size(64, 23);this.button2.TabIndex = 4;this.button2.Text = "复制文本";this.button2.Click = new System.EventHandler(this.button2_Click);// // button3// this.button3.ContextMenu = this.contextMenu1;this.button3.Location = new System.Drawing.Point(200, 8);this.button3.Name = "button3";this.button3.Size = new System.Drawing.Size(64, 23);this.button3.TabIndex = 5;this.button3.Text = "粘贴文本";this.button3.Click = new System.EventHandler(this.button3_Click);// // button4// this.button4.Location = new System.Drawing.Point(264, 8);this.button4.Name = "button4";this.button4.Size = new System.Drawing.Size(64, 23);this.button4.TabIndex = 6;this.button4.Text = "关闭程序";this.button4.Click = new System.EventHandler(this.button4_Click);// // button5// this.button5.Location = new System.Drawing.Point(72, 8);this.button5.Name = "button5";this.button5.Size = new System.Drawing.Size(64, 23);this.button5.TabIndex = 7;this.button5.Text = "剪切文本";this.button5.Click = new System.EventHandler(this.button5_Click);// // Form1// this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);this.ClientSize = new System.Drawing.Size(336, 230);this.Controls.Add(this.button5);this.Controls.Add(this.button4);this.Controls.Add(this.button3);this.Controls.Add(this.button2);this.Controls.Add(this.button1);this.Controls.Add(this.richTextBox1);this.MaximizeBox = false;this.Name = "Form1";this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;this.Text = "演示剪贴板循环";this.ResumeLayout(false);}#endregion/// <summary>/// 应用程序的主入口点。/// </summary>[STAThread]static void Main() {Application.Run(new Form1());}private void button1_Click(object sender, System.EventArgs e){//浏览文件if(this.openFileDialog1.ShowDialog()==DialogResult.OK){string MyFileName=this.openFileDialog1.FileName;string MyShortFileName=MyFileName.Substring(MyFileName.LastIndexOf("\\") 1);this.Text="演示剪贴板循环-" MyShortFileName;this.richTextBox1.LoadFile(MyFileName,RichTextBoxStreamType.PlainText);}}private void button4_Click(object sender, System.EventArgs e){//关闭程序 this.Close();}private void button2_Click(object sender, System.EventArgs e){//复制文本string MySelectedText=this.richTextBox1.SelectedText;if(MySelectedText.Length<1){MessageBox.Show("请首先选择文本！","信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);return;}//复制文本到系统剪贴板Clipboard.SetDataObject(MySelectedText);if(this.contextMenu1!=null){ //取得菜单项数量int i=this.contextMenu1.MenuItems.Count;//粘贴文本限于十个菜单if(i<10){//添加新菜单项MenuItem NewItem=new MenuItem("粘贴文本：" MySelectedText);if(MySelectedText.Length>10){NewItem.Text="粘贴文本：" MySelectedText.Substring(0,10) "...";}//处理菜单单击事件NewItem.Click =new EventHandler(MyMenuItemClickEvent);this.contextMenu1.MenuItems.Add(NewItem);this.MyClipBoardText[i]=MySelectedText;}else{//如果菜单数大于10，则清空第一个菜单，其余的向后递推string TempText=this.MyClipBoardText[0];MenuItem NewItem=new MenuItem("粘贴文本：" MySelectedText);if(MySelectedText.Length>10){NewItem.Text="粘贴文本：" MySelectedText.Substring(0,10) "...";}//处理菜单单击事件NewItem.Click =new EventHandler(MyMenuItemClickEvent);//递推原来命令0-9项菜单项成为新命令的2-10项this.MyClipBoardText[0]=MySelectedText;for(int j=0;j<9;j ){string NewText=this.MyClipBoardText[j 1];this.MyClipBoardText[j 1]=TempText;this.contextMenu1.MenuItems[j 1].Text="粘贴文本：" TempText;TempText=NewText;}}}else{//添加新菜单项MenuItem NewItem=new MenuItem("粘贴文本：" MySelectedText);if(MySelectedText.Length>10){NewItem.Text="粘贴文本：" MySelectedText.Substring(0,10) "...";}//处理菜单单击事件NewItem.Click =new EventHandler(MyMenuItemClickEvent);this.contextMenu1.MenuItems.Add(NewItem);this.contextMenu1.MenuItems[0].Text="粘贴文本：" MySelectedText;this.MyClipBoardText[0]=MySelectedText;}}private void button5_Click(object sender, System.EventArgs e){//剪切文本this.button2_Click(null,null);this.richTextBox1.SelectedText="";}private void button3_Click(object sender, System.EventArgs e){//粘贴文本，加载剪贴板循环菜单try{IDataObject MyData=Clipboard.GetDataObject();if(MyData!=null&&this.contextMenu1.MenuItems.Count==0){if(MessageBox.Show("剪贴板中的数据不是本程序复制的数据，是否粘贴？","信息提示",MessageBoxButtons.YesNo,MessageBoxIcon.Question)==DialogResult.Yes){this.richTextBox1.Paste();}else return;}}catch(Exception Err){//读取剪贴板出错MessageBox.Show("错误信息是：" Err.Message,"信息提示",MessageBoxButtons.OK,MessageBoxIcon.Error);}this.contextMenu1.Show(this.button3,new Point(0,20));}private void MyMenuItemClickEvent(object sender,System.EventArgs e){//根据选择粘贴菜单粘贴文本//获取发出消息的命令MenuItem MyItem=(MenuItem)sender;//获得命令索引int i=MyItem.Index;//设置剪贴板数据Clipboard.SetDataObject(this.MyClipBoardText[i]);//粘贴到文本文档中this.richTextBox1.Paste();}}}