asp.net怎样使用事务,请高手。。。

[gong1]

asp.net怎样使用事务,
我怎样才能在web窗体里datagrid里
当我点击有个字段名时,
实选人数增加.
当我点击另一个字段时,
实选人数减少.
我想用事务来实现,
请问怎样来作?

[wacle]

此命令映射到 BEGIN TRANSACTION 的 SQL Server 实现。

必须使用 Commit 或 Rollback 方法显式提交或回滚事务。若要确保 SQL Server .NET 数据提供程序事务管理模型正确地执行其功能，应避免使用其他事务管理模型，例如由 SQL Server 提供的模型。


public void RunSqlTransaction(string myConnString)
{
SqlConnection myConnection = new SqlConnection(myConnString);
myConnection.Open();

SqlCommand myCommand = new SqlCommand();
SqlTransaction myTrans;

// Start a local transaction
myTrans = myConnection.BeginTransaction();
// Must assign both transaction object and connection
// to Command object for a pending local transaction
myCommand.Connection = myConnection;
myCommand.Transaction = myTrans;

try
{
myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
myCommand.ExecuteNonQuery();
myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
myCommand.ExecuteNonQuery();
myTrans.Commit();
Console.WriteLine("Both records are written to database.");
}
catch(Exception e)
{
myTrans.Rollback();
Console.WriteLine("Error: {1}", e.Message);
Console.WriteLine("Error reported by {1}.", e.Source);
Console.WriteLine("Neither record was written to database.");
}
finally
{
myConnection.Close();
}
}