Found it myself finally:
The other SqlConnection must be initialized with "Enlist=false", then the connection will not be enlisted in the same transaction:
using (var db = new SqlConnection(constring + ";Enlist=false")) {
...
Question
is it possible to open a new SqlConnection inside TransactionScope, without referencing the other connection in the transaction? Inside transaction, I need to run another command which should not take part in the transaction.
void test() {
using (var t = new TransactionScope())
using (var c = new SqlConnection(constring))
{
c.Open();
try
{
using (var s = new SqlCommand("Update table SET column1 = 1");
{
s.ExecuteScalar(); // If this fails
}
t.Complete();
}
catch (Exception ex)
{
SaveErrorToDB(ex); // I don't want to run this in the same transaction
}
}
}
// I don't want this to get involved in the transaction, because it would generate
// a Distributed transaction, which I don't want. I Just want the error to go to the
// db not caring about it is run inside the TransactionScope of the previous function.
void SaveErrorToDB(Exception ex) {
using (var db = new SqlConnection(constring)) {
db.Open();
using (var cmd = new SqlCommand("INSERT INTO ErrorLog (msg) VALUES (" + ex.Message + "))
{
cmd.ExecuteNonQuery();
}
}
}
Solution
Found it myself finally:
The other SqlConnection must be initialized with "Enlist=false", then the connection will not be enlisted in the same transaction:
using (var db = new SqlConnection(constring + ";Enlist=false")) {
...
OTHER TIPS
Alternatively your SaveErrorToDB
method could take a connection:
void test() {
using (var t = new TransactionScope())
using (var c = new SqlConnection(constring))
{
c.Open();
try
{
using (var s = new SqlCommand("Update table SET column1 = 1");
{
s.ExecuteScalar(); // If this fails
}
t.Complete();
}
catch (Exception ex)
{
SaveErrorToDB(ex, c); // I don't want to run this in the same transaction
}
}
}
void SaveErrorToDB(Exception ex, SqlConnection c) {
using (var cmd = new SqlCommand("INSERT INTO ErrorLog (msg) VALUES (" + ex.Message + ", c))
{
cmd.ExecuteNonQuery();
}
}