Exception handling with threads in Asp.net

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My code has a thread inside thread. I used try catch block, so when an exception occurs, it will be shown in label like...

C#

ThreadStart threadstartprint = () => CreatePDF();
Thread threadprint = new Thread(threadstartprint);

CreatePDF()
{
     try
     {
     }
     catch(Exception ex)
     {
          lbl.text=ex.message;
     }
}

My problem is that even if an exception is occurred, but it is not showed.
Is there any way to catch exception in thread and show that exception ?

Posted 28-Aug-12 0:22am

Pratika05

Updated 28-Aug-12 1:08am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v3

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Tejas Vaishnav 28-Aug-12 6:46am

try to put break point to your thread catch part and find out it will stops there or not. if it will there then try to debug that and check what was the lbl.text after it will executed.

1 solution

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Sunil Kumar Pandab · Answer 1 · 2012-08-28T01:09:00

Solution 1

You have not started your thread so control is not invoking CreatePDF() method Which i am getting by your given code.

Your updated code should be like below :- Try this one may help...

C#

ThreadStart threadstartprint = () => CreatePDF();
Thread threadprint = new Thread(threadstartprint);
threadprint.Start();

CreatePDF()
{
     try
     {
     }
     catch(Exception ex)
     {
          lbl.text=ex.message;
     }
}

Posted 28-Aug-12 1:09am

Sunil Kumar Pandab

Updated 28-Aug-12 1:15am

v2

Comments

Pratika05 28-Aug-12 7:19am

i have started it but not included that line here but again exception is not printed in label

Sunil Kumar Pandab 29-Aug-12 3:40am

Whatever data you have given, I have tested in my system it works. Check this below:-
ThreadStart threadstartprint = () => CreatePDF();
Thread threadprint = new Thread(threadstartprint);
threadprint.Start();

public void CreatePDF()
{
try
{
throw new IndexOutOfRangeException("Exception Occurs");
}
catch(Exception ex)
{
lbl.Text=ex.Message;
}
}

Your code is working fine. If you are not sucseeding then let us know your actually code.