Represents a SQL transaction to be made in the PostgreSQL database.
The following example creates a
PgSqlConnection and a
PgSqlTransaction. It also demonstrates how to use the
PgSqlConnection.BeginTransaction,
Commit, and
Rollback methods.
public static void RunPgSqlTransaction(string myConnString) {
using (PgSqlConnection pgConnection = new PgSqlConnection(myConnString)) {
pgConnection.Open();
// Start a local transaction
PgSqlTransaction myTrans = pgConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
PgSqlCommand pgCommand = pgConnection.CreateCommand();
try {
pgCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(52, 'DEVELOPMENT')";
pgCommand.ExecuteNonQuery();
pgCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(62, 'PRODUCTION')";
pgCommand.ExecuteNonQuery();
myTrans.Commit();
Console.WriteLine("Both records are written to database.");
}
catch (Exception e) {
myTrans.Rollback();
Console.WriteLine(e.ToString());
Console.WriteLine("Neither record was written to database.");
}
finally {
pgCommand.Dispose();
myTrans.Dispose();
}
}
}
Public Shared Sub RunPgSqlTransaction(myConnString As String)
Using pgConnection As New PgSqlConnection(myConnString)
pgConnection.Open()
' Start a local transaction
Dim myTrans As PgSqlTransaction = pgConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted)
Dim pgCommand As PgSqlCommand = pgConnection.CreateCommand()
Try
pgCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(52, 'DEVELOPMENT')"
pgCommand.ExecuteNonQuery()
pgCommand.CommandText = "INSERT INTO Dept(DeptNo, DName) Values(62, 'PRODUCTION')"
pgCommand.ExecuteNonQuery()
myTrans.Commit()
Console.WriteLine("Both records are written to database.")
Catch e As Exception
myTrans.Rollback()
Console.WriteLine(e.ToString())
Console.WriteLine("Neither record was written to database.")
Finally
pgCommand.Dispose()
myTrans.Dispose()
End Try
End Using
End Sub