An unhandled exception of type 'System.InvalidCastException' occurred in system.windows.forms.dll

  • Thread starter Thread starter Ben
  • Start date Start date
B

Ben

Hi

I have a program that has just been developed on a machine running VS .NET
2003, we installed VS6 on the same machine and now we receive the below
error on click event.

The on click event doesent even seem to fire?

An unhandled exception of type 'System.InvalidCastException' occurred in
system.windows.forms.dll

Additional information: Operator is not valid for type 'DBNull' and
'Nothing'

Any help would be much appreciated

Thanks
B
 
Ben said:
Hi

I have a program that has just been developed on a machine running VS .NET
2003, we installed VS6 on the same machine and now we receive the below
error on click event.

The on click event doesent even seem to fire?

An unhandled exception of type 'System.InvalidCastException' occurred in
system.windows.forms.dll

Additional information: Operator is not valid for type 'DBNull' and
'Nothing'

Any help would be much appreciated

Thanks
B
Click to expand...

I would bet you are reading data from a database. One field you are
pulling from the database is set to null and you are trying to do some
operation on it.

Chris
 

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