form1.cs

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

namespace WindowsApplication1
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox txtOrderId;
		private System.Windows.Forms.Button RollbackButton;
		private System.Windows.Forms.Button CommitButton;
		/// <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 Form Designer generated code
		/// <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.label1 = new System.Windows.Forms.Label();
			this.txtOrderId = new System.Windows.Forms.TextBox();
			this.RollbackButton = new System.Windows.Forms.Button();
			this.CommitButton = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 48);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(48, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "OrderID";
			// 
			// txtOrderId
			// 
			this.txtOrderId.Location = new System.Drawing.Point(80, 40);
			this.txtOrderId.Name = "txtOrderId";
			this.txtOrderId.Size = new System.Drawing.Size(152, 21);
			this.txtOrderId.TabIndex = 1;
			this.txtOrderId.Text = "";
			// 
			// RollbackButton
			// 
			this.RollbackButton.Location = new System.Drawing.Point(32, 112);
			this.RollbackButton.Name = "RollbackButton";
			this.RollbackButton.Size = new System.Drawing.Size(88, 32);
			this.RollbackButton.TabIndex = 2;
			this.RollbackButton.Text = "Delete Order(Rollback)";
			this.RollbackButton.Click += new System.EventHandler(this.RollbackButton_Click);
			// 
			// CommitButton
			// 
			this.CommitButton.Location = new System.Drawing.Point(160, 112);
			this.CommitButton.Name = "CommitButton";
			this.CommitButton.Size = new System.Drawing.Size(88, 32);
			this.CommitButton.TabIndex = 3;
			this.CommitButton.Text = "Delete Order(Commit)";
			this.CommitButton.Click += new System.EventHandler(this.CommitButton_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.CommitButton,
																		  this.RollbackButton,
																		  this.txtOrderId,
																		  this.label1});
			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() 
		{
			Application.Run(new Form1());
		}

		private void RollbackButton_Click(object sender, System.EventArgs e)
		{
			//Create a connection

			SqlConnection cn =  new SqlConnection(@"Data Source=(local); Integrated Security=SSPI;database=Northwind"); 					
              
			//Open the connection
			cn.Open();

			//Begin the transaction
			SqlTransaction objTrans= cn.BeginTransaction();

			try 
			{      
				//Create a command object 
				SqlCommand cmd= cn.CreateCommand();
  
				//supply values to the command's properties        
				cmd.CommandType= CommandType.Text;
				cmd.CommandText="DELETE Orders WHERE OrderId = " +
					Convert.ToString(txtOrderId.Text);
    
				//set the Transaction property of the command object  
				cmd.Transaction= objTrans;

				//Delete the order
				cmd.ExecuteNonQuery();    

				//Commit the Transaction
				objTrans.Commit();
        
				//If no exception has been raised, transaction has been committed - give message
				MessageBox.Show ("Transaction Committed"+ "\n"+ "Order and Order Details have been successfully deleted", "Commit Transaction");
			}

			catch ( System.Data.SqlClient.SqlException  e1)
			{
				//Rollback the transaction
				objTrans.Rollback();

				// Display Error Message.
				MessageBox.Show ("Error-TRANSACTION ROLLED BACK " + "\n"+  e1.Message,"Rollback Transaction");
			}

			catch ( System.Exception  e2)
			{
				// Display Error Message.
				MessageBox.Show ("System Error " + "\n"+  e2.Message,"Error");
			}

			finally
			{
				//Close the connection
				cn.Close();
			}
		}

		private void CommitButton_Click(object sender, System.EventArgs e)
		{
			//Create a connection
			SqlConnection cn = new SqlConnection(@"Data Source=(local); Integrated Security=SSPI;database=Northwind"); 					
              
			//Open the connection
			cn.Open();
  
			//Begin the transaction
			SqlTransaction objTrans= cn.BeginTransaction();

			try
			{          
				//Create a command object 
				SqlCommand cmd = cn.CreateCommand();
        
				//supply values to the command's properties        
				cmd.CommandType = CommandType.Text;
				cmd.CommandText = "DELETE [Order Details] WHERE " +
					"OrderId=" + Convert.ToString(txtOrderId.Text);
				//set the Transaction property of the command object	
				cmd.Transaction= objTrans;

				//Delete the order
				cmd.ExecuteNonQuery();		
				cmd.CommandText="DELETE Orders WHERE " +
					"OrderId=" + Convert.ToString(txtOrderId.Text);

				//Delete the order
				cmd.ExecuteNonQuery();		

				//Commit the Transaction
				objTrans.Commit();
        
				//If code comes here, transaction has been committed - give message
				MessageBox.Show ("Transaction Committed"+ "\n"+ "Order and Order Details have been successfully deleted", "Commit Transaction");
			}

			catch ( System.Data.SqlClient.SqlException  e1)
			{
				//Rollback the transaction
				objTrans.Rollback();  

				// Display Error Message.
				MessageBox.Show ("Error-TRANSACTION ROLLED BACK " + "\n"+  e1.Message,"Rollback Transaction");
			}

			catch ( System.Exception  e2)
			{
				// Display Error Message.
				MessageBox.Show ("System Error " + "\n"+  e2.Message,"Error");
			}

			finally
			{
				//Close the connection
				cn.Close();  
			}
		}
	}
}