Question

Lets start by saying that I am debugging someone else’s code 🙂
The error occurs at the code routine that is attempting to export data from a gridview to an excel file.

GridView gv = new GridView();
Table table = new Table();
int maxRow = 60000;
int gvrow = Data().Tables[0].Rows.Count;  

The error is occuring at Data().Tables[0].Rows.Count

The error in the immediate window is:
? Data().Tables[0].Rows.Count
A first chance exception of type ‘System.FormatException’ occurred in System.Data.dll
‘Data()’ is null

The error message is:
System.NullReferenceException was unhandled by user code
Message=”Object reference not set to an instance of an object.”

Any ideas what is wrong here?

Answer 1

Data() returns null. Fix that.