form1.cs

来自「Sams Teach Yourself C# Web Programming i」· CS 代码 · 共 117 行

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;

namespace Structured_Error_Handling
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class fclsErrorHandlingExample : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button btnCatchException;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public fclsErrorHandlingExample()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.btnCatchException = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// btnCatchException
			// 
			this.btnCatchException.Location = new System.Drawing.Point(104, 28);
			this.btnCatchException.Name = "btnCatchException";
			this.btnCatchException.Size = new System.Drawing.Size(96, 23);
			this.btnCatchException.TabIndex = 0;
			this.btnCatchException.Text = "Catch Exception";
			this.btnCatchException.Click += new System.EventHandler(this.btnCatchException_Click);
			// 
			// fclsErrorHandlingExample
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.btnCatchException});
			this.Name = "fclsErrorHandlingExample";
			this.Text = "Try...Catch...Finally";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new fclsErrorHandlingExample());
		}

		private void btnCatchException_Click(object sender, System.EventArgs e)
		{
			long lngNumerator = 10;
			long lngDenominator = 0;
			long lngResult;

			try
			{
				Debug.WriteLine("Try");
				lngResult = lngNumerator / lngDenominator;
			}
			catch (Exception objException)
			{
				Debug.WriteLine("Catch");
				MessageBox.Show("An error has occurred: " + objException.Message);
			}
			finally
			{
				Debug.WriteLine("Finally");
			}

			Debug.WriteLine("Done Trying");


		}
	}
}