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Paradoxal Press
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Category: Programming
Level: Beginner to seasoned
900 pages
ISBN-10 097661322-0
ISBN-13 978-097661322-0
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Listing 20-7 extracted from chapter Transactions
Listing 20-6< > Listing 20-8
This listing can be compiled with the command line: csc.exe /target:exe Example_20_7.cs /r:System.Transactions.dll Errors: 0 Warnings: 1
Example_20_7.cs
using System.Data.Common;
using System.Data.SqlClient;
using System.Transactions;
class Program {
static void Main() {
string sCnx =
"server = localhost ; uid=sa ; pwd =; database = ORGANIZATION";
string sCmd1 =
"INSERT INTO DEPARTMENTS VALUES ('COM','Communication')";
string sCmd2 =
"INSERT INTO EMPLOYEES VALUES ('COM','Smith','Adam','(123) 456-7899')";
CommittableTransaction tx = new CommittableTransaction();
try {
using (SqlConnection cnx = new SqlConnection(sCnx)) {
cnx.Open();
cnx.EnlistTransaction(tx);
DbCommand cmd = new SqlCommand(sCmd1, cnx);
cmd.ExecuteNonQuery();
cmd.CommandText = sCmd2;
cmd.ExecuteNonQuery();
tx.BeginCommit(OnCommited,null);
} // end using cnx.
} catch { }
// Here, the code can be executed even though the
// transaction is not commited.
}
static void OnCommited(System.IAsyncResult asyncResult) {
CommittableTransaction tx = asyncResult as CommittableTransaction;
try {
using (tx) {
tx.EndCommit(asyncResult);
}
} catch (TransactionException e) {
// The transaction didn't commit!
}
}
}
Copyright Patrick Smacchia 2006 2007
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