в 15:31, 26 мая 2010

2010-05-26T15:31:35Z

Admin: 1 версия

2010-05-26T12:10:57Z

1 версия

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==SqlTransaction.Rollback==

<source lang="csharp">

using System;
using System.Data;
using System.Data.SqlClient;
class Savepoint {
public static void Main() {
SqlConnection mySqlConnection =
new SqlConnection(
"server=localhost;database=Northwind;uid=sa;pwd=sa"
);
mySqlConnection.Open();
SqlTransaction mySqlTransaction = mySqlConnection.BeginTransaction();
SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
mySqlCommand.Transaction = mySqlTransaction;
mySqlCommand.rumandText =
"INSERT INTO Customers ( " +
" CustomerID, CompanyName " +
") VALUES ( " +
" "J8COM", "J8 Company" " +
")";
int numberOfRows = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("Number of rows inserted = " + numberOfRows);
mySqlTransaction.Save("SaveCustomer");
mySqlCommand.rumandText = "INSERT INTO Orders (CustomerID ) VALUES ( "J8COM" )";
numberOfRows = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("Number of rows inserted = " + numberOfRows);
mySqlTransaction.Rollback("SaveCustomer");
mySqlCommand.rumandText =
"SELECT CustomerID, CompanyName " +
"FROM Customers " +
"WHERE CustomerID = "J8COM"";
SqlDataReader mySqlDataReader = mySqlCommand.ExecuteReader();
while (mySqlDataReader.Read()) {
Console.WriteLine("mySqlDataReader[\" CustomerID\"] = " +
mySqlDataReader["CustomerID"]);
Console.WriteLine("mySqlDataReader[\" CompanyName\"] = " +
mySqlDataReader["CompanyName"]);
}
mySqlDataReader.Close();
mySqlCommand.rumandText = "DELETE FROM Customers WHERE CustomerID = "J8COM"";
numberOfRows = mySqlCommand.ExecuteNonQuery();
Console.WriteLine("Number of rows deleted = " + numberOfRows);
mySqlTransaction.rumit();
mySqlConnection.Close();
}
}

</source>

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в 15:31, 26 мая 2010

Admin: 1 версия