利用C#编写一段读写TXT文本的小程序

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.IO;using System.Windows.Forms;namespace WindowsApplication2{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } ///

/// 当某个选项卡被取消选中时 ///

private void tabControl1_Deselected(object sender, TabControlEventArgs e) { e.TabPage.Text = e.TabPage.Text.TrimStart('*'); } ///

/// 当某个选项卡被选中时 /桐老//

private void tabControl1_Selected(object sender, TabControlEventArgs e) { e.TabPage.Text = "*" + e.TabPage.Text; } ///

/// 打开文件 ///

private void button1_Click(object sender, EventArgs e) { if (openFileDialog1.ShowDialog() == DialogResult.OK) { //取得当前的选项卡数目 int tabPageCount = this.tabControl1.TabPages.Count; //取晌腔得欲打开的文件路径 string filePath = this.openFileDialog1.FileName; //取得欲打开的文件名 string fileName = Path.GetFileName(filePath); //分析是否为txt格式的文件 if (Path.GetExtension(filePath).ToLower() != ".txt") { MessageBox.Show("非法文件格式!","打开文件失败",MessageBoxButtons.OK,MessageBoxIcon.Stop); return; } //采用"page"加上当前的选项卡局谨升数目加1做为选项卡的名称 string currentPageName = "page" + (tabPageCount + 1).ToString(); //采用"richTextBox"加上当前的选项卡数目加1做为选项卡中包含RichTextBox的名称 string currentTxtName = "richTextBox" + (tabPageCount + 1).ToString(); //添加一个新的选项卡,并指定其选项卡显示文字为当前打开的文件名 this.tabControl1.TabPages.Add(currentPageName,fileName); //实例化一个新的RichTextBox RichTextBox ricTxt = new RichTextBox(); //设置其名称,布局等属性 ricTxt.Name = currentTxtName; ricTxt.Dock = DockStyle.Fill; //ricTxt.TextChanged += //将新这个新的RichTextBox对象添加到当前新建的选项卡中 this.tabControl1.TabPages[currentPageName].Controls.Add(ricTxt); //将文件加载到当前的RichTextBox ricTxt.LoadFile(filePath,RichTextBoxStreamType.PlainText); } } private void changePageText(string currentPageName) { this.tabControl1.TabPages[currentPageName].Text = "*" + currentPageName; } }}namespace WindowsApplication2{ partial class Form1 { ///

/// 必需的设计器变量。 ///

private System.ComponentModel.IContainer components = null; ///

/// 清理所有正在使用的资源。 ///

/// 如果应释放托管资源，为 true；否则为 false。 protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 ///

/// 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。 ///

private void InitializeComponent() { this.tabControl1 = new System.Windows.Forms.TabControl(); this.button1 = new System.Windows.Forms.Button(); this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); this.SuspendLayout(); // // tabControl1 // this.tabControl1.Location = new System.Drawing.Point(0, -3); this.tabControl1.Name = "tabControl1"; this.tabControl1.SelectedIndex = 0; this.tabControl1.Size = new System.Drawing.Size(540, 510); this.tabControl1.TabIndex = 0; this.tabControl1.Selected += new System.Windows.Forms.TabControlEventHandler(this.tabControl1_Selected); this.tabControl1.Deselected += new System.Windows.Forms.TabControlEventHandler(this.tabControl1_Deselected); // // button1 // this.button1.Location = new System.Drawing.Point(22, 509); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(75, 23); this.button1.TabIndex = 1; this.button1.Text = "浏览"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // openFileDialog1 // this.openFileDialog1.FileName = "openFileDialog1"; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(539, 540); this.Controls.Add(this.button1); this.Controls.Add(this.tabControl1); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion private System.Windows.Forms.TabControl tabControl1; private System.Windows.Forms.Button button1; private System.Windows.Forms.OpenFileDialog openFileDialog1; }}