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Dear All,

I'm getting this error how resolve this error.

I'm using SqlHelper.cs and try to build asynchronous data access with callback method
(Fragment 5) at the time of filling data table in FillDataTable method i'm getting this error.

Reference url :Asynchronous Data Access[^]

please replay ASAP

Thanks & Regards,

The parameter needs to be a string and it's not. The message tells you that. If you posted code, we could tell you how to fix it
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Try to put the value in an object, and then check its type when in the debugger. You can also use the immediate window and do a gettype on the value returned.
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