input string was not in correct format how to handle this error

Question

Hi all please help..... i want to handle this error input string was not in correct format using try and catch block. Thanks in advance........

Jignesh Trivedi · Answer

hi If you handle this error in try catch then use System.FormatException in catch. but it catch all type format expression error. Please refer. http://www.toplinestrategies.com/dotneters/tag/system-formatexception-was-unhandled-by-user-code/?lang=en http://www.dotnetperls.com/formatexception hope this help. http://www.toplinestrategies.com/dotneters/tag/system-formatexception-was-unhandled-by-user-code/?lang=en

Muralidharan Deenathayalan · Answer

Are you trying to convert any values then you their parse method. For example int.TryParse. //For failure conversion int i = default ( int ); if ( int .TryParse( 1h  out i)) { MessageBox .Show(i.ToString()); } else { MessageBox .Show( Unable to convert the value to Int ); } The above code will show the message box Unable to convert the value to Int message. //For success conversion int i = default ( int ); if ( int .TryParse( 1  out i)) { MessageBox .Show(i.ToString()); } else { MessageBox .Show( Unable to convert the value to Int ); } The above code will show the message box with 1 message. If the conversion is success then you'll get the value in i otherwise it will execute the else part. If you don't want to use TryParse then you can use try catch as depicted below. try { int i = 0; i = Convert .ToInt16( 1h ); } catch ( FormatException ex) { throw ex; } Hope this helps you.