Object reference not set to an instance of an object

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ASP.NET

Dear Sir

Object reference not set to an instance of an object in dataschema()
when i generate excel report.

Posted 8-Oct-11 3:15am

DINESH K MAURYA

Updated 9-Oct-11 21:07pm

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André Kraak 8-Oct-11 9:18am

That is a lot of code to go through. Can you narrow it down for us, in which line are you getting the error?

E.F. Nijboer 8-Oct-11 9:20am

You need to be more specific where the error is raised. Also, you can set a breakpoint at the beginning and use the debugger to step through it line by line. You can check out the variables and you'll quickly notice what's going wrong (or not as expected).

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OriginalGriff · Answer 1 · 2011-10-08T03:23:00

Solution 1

Without knowing where the error occurs it is difficult to be sure, but I would be very suspicious of any code like this:

VB

Dim columnName As String = System.Convert.ToString(drow("ColumnName"))

Are you sure you called your column "ColumnName"? It does seem a bit unlikely...

Posted 8-Oct-11 3:23am

OriginalGriff