use try and catch in c#

Question

1.00/5 (1 vote)

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how to define

C#

try
{
    Label_0125:
}

catch (object obj1) 
{
    Microsoft.VisualBasic.CompilerServices.ProjectData.SetProjectError((Exception) obj1);
    goto Label_0125;
}

if i define

Exception

in

catch(Exception obj1)

then error that " No such label 'Label_0125' within the scope of the goto statement "

what i do wrong ?

please help

thanks in advance

Posted 11-Aug-11 19:20pm

raj_raje

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Comments

Kim Togo 12-Aug-11 1:57am

If you find yourself needing to use the goto statement. Reconsider.

Philippe Mori 12-Aug-11 18:52pm

At first, it does not make much sense to loop back on an exception. And if you do need to loop, the your try/catch block should just around the code that might fail.

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Prerak Patel · Answer 1 · 2011-08-11T19:35:00

Solution 1

Seriously!! Why goto?! You can put the label out of Try. (Ref:http://msdn.microsoft.com/en-us/library/13940fs2(v=vs.71).aspx[^])
But try to rearrange your code so that you can avoid goto.

C#

while(true) // or limit the iterations as per your wish
{
try
{
  //your task
  break;//exit loop
}
 
catch (Exception obj1) 
{
  Microsoft.VisualBasic.CompilerServices.ProjectData.SetProjectError(obj1);
}
}

Posted 11-Aug-11 19:35pm

Prerak Patel

Comments

Philippe Mori 12-Aug-11 18:54pm

Effectively the code should look like that. Maybe with some code before the try like getting next item to process as if the failure occurs in that code, you do not want to execute again wihich might result in an infinite loop.

Prerak Patel 12-Aug-11 22:59pm

I agree. But OP use labels and goto to try it until success. Keeping that in mind I suggested a loop like this.