"FormatException was unhandled" Input string was not in a correct format

I have 开发者_Python百科an error in my website and trying to resolve: Error "format exception was unhandled" such that it work for both date time as well as with string and integer.

Please see the details and code from this link http://tinyurl.com/ydg3u7s

Thanks

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return Convert.ChangeType(IsThisObjectANull, DataTypeCode);

The conversion is probably failing due to incompatible types . You might have to debug and check when this happens .

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Perhaps some try/catch mechanism?