表示要在 SQL Server 數據庫中處理的 Transact-SQL 事務。無法繼承此類。
應用程序通過在 SqlConnection 對象上調用 BeginTransaction 來創建 SqlTransaction 對象。對 SqlTransaction 對象執行與該事務關聯的所有後續操作（例如提交或中止該事務）。
在提交或回滾 SqlTransaction 時，應始終使用 Try/Catch 進行異常處理。如果連接終止或事務已在服務器上回滾，則 Commit 和 Rollback 都會生成 InvalidOperationException。
下面的示例創建一個 SqlConnection 和一個 SqlTransaction。此示例還演示如何使用 BeginTransaction、Commit 和 Rollback 等方法。出現任何錯誤時事務都會回滾。Try/Catch 錯誤處理用於處理嘗試提交或回滾事務時的所有錯誤。
private static
void ExecuteSqlTransaction(string connectionString)
{
using (SqlConnection connection =
new SqlConnection(connectionString))
{
connection.Open();
SqlCommand command = connection.CreateCommand();
SqlTransaction transaction;
// Start a local transaction.
transaction = connection.BeginTransaction("SampleTransaction");
// Must assign both transaction object and connection
// to Command object for a pending local transaction
command.Connection = connection;
command.Transaction = transaction;
try
{
command.CommandText =
"Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
command.ExecuteNonQuery();
command.CommandText =
"Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
command.ExecuteNonQuery();
// Attempt to commit the transaction.
transaction.Commit();
Console.WriteLine("Both records are written to database.");
}
catch (Exception ex)
{
Console.WriteLine("Commit Exception Type: {0}", ex.GetType());
Console.WriteLine(" Message: {0}", ex.Message);
// Attempt to roll back the transaction.
try
{
transaction.Rollback();
}
catch (Exception ex2)
{
// This catch block will handle any errors that may have occurred
// on the server that would cause the rollback to fail, such as
// a closed connection.
Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType());
Console.WriteLine(" Message: {0}", ex2.Message);
}
}
}
}