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Old November 21st, 2004, 04:03 PM
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Default "Specified cast is not valid" help

Could anyone tell me why this does NOT work...

if (((int) Data.ExecuteAggregate(sqlUserAuth)) == 1)
Data.ExecuteAggregate is a function that will return an object. I cast it to an int but errors out with "System.InvalidCastException: Specified cast is not valid."

The altered code below DOES work though...

if (Convert.ToInt32(Data.ExecuteAggregate(sqlUserAuth)) == 1)
I've tried to look for limitations with casting but have not found any.

Thanks in advance for your help!
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Old November 22nd, 2004, 09:21 AM
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When you use Convert.Toxxx it coverts it to a .NET datatype. (int) converts it to an Integer datatype in C# if I have read correctly.

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Old November 23rd, 2004, 12:12 PM
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From what I have experienced... You can cast from similar types. So in this case you could cast from a double, single, float, etc to an int. But if you want to convert (note the keyword) you need to use the Convert class methods like you have found.

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