Network access for Distributed Transaction Manager (MSDTC) has been disabled

Question

error:

Network access for Distributed Transaction Manager (MSDTC) has been disabled. Please enable DTC for network access in the security configuration for MSDTC using the Component Services Administrative tool.

using (System.Transactions.TransactionScope ts = new System.Transactions.TransactionScope())   
11                 {   
12                     try  
13                     {   
14                         foreach (DataRow row in this.dt1.Rows)   
15                         {   
16                             int titleId = int.Parse(row["titleId"].ToString());   
17                             string fname = row["fname"].ToString();   
18                             string lname = row["lname"].ToString();   
19   
20                             if (cmd.Parameters.Count > 0)   
21                                 cmd.Parameters.Clear();   
22   
23                             cmd.Parameters.AddWithValue("@titleId", titleId);   
24                             cmd.Parameters.AddWithValue("@fname", fname);   
25                             cmd.Parameters.AddWithValue("@lname", lname);   
26                             cmd.ExecuteNonQuery();   
27   
28                         }   
29                         con.Close();   
30                         ts.Complete();   
31                     }   
32                     catch (Exception ex)   
33                     {   
34   
35                     }                       
36                 }   
37             }

Possible duplicate: http://stackoverflow.com/questions/794364/how-do-i-use-transactionscope-in-c — Deano, Mar 01 '11 at 09:05
wow 6 yrs ago!, in addition to this if you are using async u need to add the "TransactionScopeAsyncFlowOption.Enabled" as in using (var trans = new TransactionScope((TransactionScopeAsyncFlowOption.Enabled))) — Jin, May 11 '17 at 03:29

Sundeep · Answer 1 · 2017-01-27T21:58:26.777

To enable Network access to MSDTC on Windows Vista/7/8 Server 2008R2/2012, follow the steps below:

Click Start, click Run, type dcomcnfg and then click OK to open Component Services.
In the console tree, click to expand Component Services, click to expand Computers, click to expand My Computer, click to expand Distributed Transaction Coordinator and then click Local DTC.
Right click Local DTC and click Properties to display the Local DTC Properties dialog box.
Click the Security tab.
Check mark "Network DTC Access" checkbox.
Finally check mark "Allow Inbound" and "Allow Outbound" checkboxes.
Click Apply, OK.
A message will pop up about restarting the service.
Click OK and That's all.

what are the security risks of this? I'd rather not blindly open up network access without fully understanding what it means. — jtate, Apr 29 '21 at 18:00

score 3 · Answer 2 · edited Jan 28 '17 at 00:30

Close the connection after the transaction scope Complete method.

ts.Complete();
con.Close();

the completed code is

using (System.Transactions.TransactionScope ts = new  Sytem.Transactions.TransactionScope())   
{   
    try  
    {   
        foreach (DataRow row in this.dt1.Rows)   
        {   
            int titleId = int.Parse(row["titleId"].ToString());   
            string fname = row["fname"].ToString();   
            string lname = row["lname"].ToString();   

            if (cmd.Parameters.Count > 0)   
                cmd.Parameters.Clear();   

            cmd.Parameters.AddWithValue("@titleId", titleId);   
            cmd.Parameters.AddWithValue("@fname", fname);   
            cmd.Parameters.AddWithValue("@lname", lname);   
            cmd.ExecuteNonQuery();   
        }   
        ts.Complete(); 
        con.Close();     
    }   
    catch (Exception ex)   
    {   
    }                       
}

score 2 · Answer 3 · answered Dec 03 '21 at 23:50

2

Adding Enlist=false; at the end of the connection string helped me!

answered Dec 03 '21 at 23:50

Merin Nakarmi

3,148
3
35
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score 0 · Answer 4 · answered Oct 05 '21 at 16:26

If someone is looking at this, and using linq, then just wrap the whole transaction into a JoinScope like this:

using js = new JoinScope(false) {
    using (System.Transactions.TransactionScope ts = new Sytem.Transactions.TransactionScope()) { 
        ... 
    }
}

score -1 · Answer 5 · answered Oct 05 '18 at 02:30

InnerException = {"Network access for Distributed Transaction Manager (MSDTC) has been disabled. Please enable DTC for network access in the security configuration for MSDTC using the Component Services Administrative tool."}

I followed the below steps to resolve above issue on my local system

Enable Network DTC Access :

Run dcomcnfg in start to open the Component Services Administrative tool
Click on Local DTC and open the property window
Click on security Tab and make below security settings to enable Network DTC Access

Enabled Firewall Rules related to Distributed Transaction Coordinator (TCP-IN/TPC-

For more details @https://rajeevdotnet.blogspot.com/2018/10/wcf-exception-network-access-for.html

Network access for Distributed Transaction Manager (MSDTC) has been disabled

5 Answers5