asp.net 使用事务

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Data; 
using System.Data.SqlClient; 
using System.Transactions; 
public partial class swstudy : System.Web.UI.Page 
{ 
private SqlConnection conn; 
protected void Page_Load(object sender, EventArgs e) 
{ 
} 
private SqlConnection GetConnection() 
{ 
if (conn!=null&&conn.State == ConnectionState.Open) 
{ 
return conn; 
} 
else 
{ 
return conn= new SqlConnection("server=PC-200911131211;database=test;uid=sa;pwd=sa123456"); 
} 
} 
//提交 
protected void Button1_Click(object sender, EventArgs e) 
{ 
string str1 = this.TextBox1.Text; 
string str2 = this.TextBox2.Text; 
using (GetConnection()) 
{ 
conn.Open(); 
//事务 
SqlTransaction tran; 
tran = conn.BeginTransaction(); 
//提交一 
SqlCommand cmd1 = new SqlCommand("insert into m1(m1,m2)values('" + str1 + "','" + str2 + "')", conn); 
cmd1.Transaction = tran; 
//提交二 
SqlCommand cmd2 = new SqlCommand("insert into messages(msg)values('" + str1 + "')", conn); 
cmd2.Transaction = tran; 
try 
{ 
cmd1.ExecuteNonQuery(); 
cmd2.ExecuteNonQuery(); 
tran.Commit();//提交事物 
Response.Write("<script>alert('全部提交OK')</script>"); 
} 
catch 
{ 
tran.Rollback();//回滚操作 
Response.Write("<script>alert('事务回滚')</script>"); 
} 
finally 
{ 
conn.Close(); 
} 
} 
} 
}