c#添加事物（全部执行和带保存点的执行）

protected void Button2_Click(object sender, EventArgs e)
{
// 执行事务
SqlConnection con = new SqlConnection(str);
con.Open();
SqlTransaction tran = con.BeginTransaction();

try
{
SqlCommand cmd1 = new SqlCommand("INSERT INTO Code( name ) VALUES ( 'ww1')", con);
SqlCommand cmd2 = new SqlCommand("INSERT INTO Code( name ) VALUES ( 'ww2')", con);
cmd1.Transaction = tran;
cmd2.Transaction = tran;
cmd1.ExecuteNonQuery();
cmd2.ExecuteNonQuery();
tran.Commit();
}
catch
{
tran.Rollback();
}
finally
{
con.Close();
GetData();
}
}

protected void Button3_Click(object sender, EventArgs e)
{
// 执行带保存点的事务
// 执行事务
SqlConnection con = new SqlConnection(str);
con.Open();
SqlTransaction tran = null;
tran = con.BeginTransaction();
try
{
SqlCommand cmd1 = new SqlCommand("INSERT INTO Code( name ) VALUES ( 'ww3')", con);
SqlCommand cmd2 = new SqlCommand("INSERT INTO Code( name ) VALUES ( 'ww4')", con);
cmd1.Transaction = tran;
cmd1.ExecuteNonQuery();
tran.Save("One");
cmd2.Transaction = tran;
cmd2.ExecuteNonQuery();
tran.Rollback("One");
tran.Commit();
}
catch
{
tran.Rollback();

}
finally {
con.Close();
GetData();
}
}