why not ????

Question

int Credits = Convert.ToInt32(datatbl5.Rows[0][0].ToString());

when i pass it nothings it gives error "input string was not in correct format" ?

Answer 1

This error indicates that the value "datatbl5.Rows[0][0]" is null or is not a string that contains the number to convert.
For example, you can't convert the "abc" to int by using the Convert.ToInt32 method.
You can use Int32.TryParse method, and it returns a value that indicates whether the operation succeeded.
Here is a simple code example.

int Credits;
bool s = Int32.TryParse(table.Rows[0][0].ToString(), out Credits);

Best Regards,
Daniel Zhang

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MSDN Community Support
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Answer 2

To add to Daniel's reply, if it can't Parse the data (and so it returns a false), the value in Credits will be set to zero.

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~~Bonnie DeWitt [C# MVP]

http://geek-goddess-bonnie.blogspot.com

Answer 3

Hi,
Has your problem been solved? If it is resolved, we suggest that you mark it as the answer. So it can help other people who have the same problem find a solution quickly.
Best Regards,
Daniel Zhang

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MSDN Community Support
Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to MSDN Support, feel free to contact [e-mail].