利用委托机制处理.NET中的异常
转自 terrylee.cnblogs.com
/// <summary>/// 应用程序的主入口点。/// </summary>[STAThread]static void Main(){ ///添加主线程的全局异常处理 Application.ThreadException += new ThreadExceptionEventHandler( MainUIThreadExceptionHandler); Application.Run(new Form1());}?处理程序：
public static void MainUIThreadExceptionHandler(Exception ex){ MainUIThreadExceptionHandler(null, new ThreadExceptionEventArgs(ex));}/// <summary>/// 主线程全局异常信息的处理/// </summary>/// <param name="sender"></param>/// <param name="t"></param>public static void MainUIThreadExceptionHandler(object sender, ThreadExceptionEventArgs e){ MessageBox.Show( "应用程序发生了如下的异常信息" + "：" + (char) 13 + (char) 13 + e.Exception.Message + (char) 13 + (char) 13 + "请于系统管理员取得联系！" + (char) 13 + (char) 13 , "异常信息" , MessageBoxButtons.OK , MessageBoxIcon.Error , MessageBoxDefaultButton.Button1 , MessageBoxOptions.ServiceNotification);}?/// <summary>/// 在线程的入口点加入try-catch块/// </summary>private void DataSave(){ try { CreateException(); } catch (Exception e) { ///通过delegate转向工作线程的异常处理 new WorkerThreadExceptionHandlerDelegate( WorkerThreadExceptionHandler).BeginInvoke(e , null , null); }}?工作线程异常的处理：/// <summary>/// 声明工作线程的delegate/// </summary>public delegate void WorkerThreadExceptionHandlerDelegate(Exception e);/// <summary>/// 工作线程的异常处理/// </summary>/// <param name="e"></param>public void WorkerThreadExceptionHandler(Exception e){ ///添加其他的处理代码 ///通知全局异常处理程序 MainUIThreadExceptionHandler(this, new ThreadExceptionEventArgs(e));}?using System;using System.Threading;using System.Windows.Forms;namespace UseDelegateException{ /// <summary> /// 功能：利用Delegate实现异常的全局处理 /// 编写：Terrylee /// 日期：2005年12月10日 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button btnMainUIThread; private System.Windows.Forms.Button btnWorkThread; /// <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.btnMainUIThread = new System.Windows.Forms.Button(); this.btnWorkThread = new System.Windows.Forms.Button(); this.SuspendLayout(); // // btnMainUIThread // this.btnMainUIThread.Location = new System.Drawing.Point(40, 72); this.btnMainUIThread.Name = "btnMainUIThread"; this.btnMainUIThread.Size = new System.Drawing.Size(112, 48); this.btnMainUIThread.TabIndex = 0; this.btnMainUIThread.Text = "主线程异常"; this.btnMainUIThread.Click += new System.EventHandler(this.btnMainUIThread_Click); // // btnWorkThread // this.btnWorkThread.Location = new System.Drawing.Point(240, 72); this.btnWorkThread.Name = "btnWorkThread"; this.btnWorkThread.Size = new System.Drawing.Size(112, 48); this.btnWorkThread.TabIndex = 1; this.btnWorkThread.Text = "工作线程异常"; this.btnWorkThread.Click += new System.EventHandler(this.btnWorkThread_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(392, 197); this.Controls.Add(this.btnWorkThread); this.Controls.Add(this.btnMainUIThread); this.MaximizeBox = false; this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { ///添加主线程的全局异常处理 Application.ThreadException += new ThreadExceptionEventHandler( MainUIThreadExceptionHandler); Application.Run(new Form1()); } public static void MainUIThreadExceptionHandler(Exception ex) { MainUIThreadExceptionHandler(null, new ThreadExceptionEventArgs(ex)); } /// <summary> /// 主线程全局异常信息的处理 /// </summary> /// <param name="sender"></param> /// <param name="t"></param> public static void MainUIThreadExceptionHandler(object sender, ThreadExceptionEventArgs e) { MessageBox.Show( "应用程序发生了如下的异常信息" + "：" + (char) 13 + (char) 13 + e.Exception.Message + (char) 13 + (char) 13 + "请于系统管理员取得联系！" + (char) 13 + (char) 13 , "异常信息" , MessageBoxButtons.OK , MessageBoxIcon.Error , MessageBoxDefaultButton.Button1 , MessageBoxOptions.ServiceNotification); } /// <summary> /// 声明工作线程的delegate /// </summary> public delegate void WorkerThreadExceptionHandlerDelegate(Exception e); /// <summary> /// 工作线程的异常处理 /// </summary> /// <param name="e"></param> public void WorkerThreadExceptionHandler(Exception e) { ///添加其他的处理代码 ///通知全局异常处理程序 MainUIThreadExceptionHandler(this, new ThreadExceptionEventArgs(e)); } /// <summary> /// 制造异常信息，这里抛出一个除0的异常 /// </summary> private void CreateException() { int a = 1; int b = 0; int c; c = a / b; } /// <summary> /// 在线程的入口点加入try-catch块 /// </summary> private void DataSave() { try { CreateException(); } catch (Exception e) { ///通过delegate转向工作线程的异常处理 new WorkerThreadExceptionHandlerDelegate( WorkerThreadExceptionHandler).BeginInvoke(e , null , null); } } /// <summary> /// 发生主线程异常 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnMainUIThread_Click(object sender, System.EventArgs e) { ///这里出现一个异常，我们不予捕获，交由全局处理函数 CreateException(); } /// <summary> /// 发生工作线程异常 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnWorkThread_Click(object sender, System.EventArgs e) { Thread t = new Thread(new ThreadStart(DataSave)); t.Start(); } }}?