Problem in cast data row

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4.00/5 (2 votes)

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Hello !
I am trying to cast a generic DataRow Object to my Typed DataRow Object

C#

dsUIContentType.UIContentTypeRow drTyped = (dsUIContentType.UIContentTypeRow)dr;

. But i get an exeption :

Unable to cast object of type 'System.Data.DataRow' to type 'UIContentTypeRow'.

when casting from a number, the value must be a number less than infinity.

What's the solution?

Posted 7-May-12 20:29pm

Saeid.Babaei86

Updated 7-May-12 21:06pm

v2

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Herman<T>.Instance 8-May-12 9:23am

How many values in the Database are NULL? I guess that is the basic of this error. You try to cast NULL to decimal or int. Better make that 'Decimal?' or 'int?'

Herman<T>.Instance 8-May-12 9:24am

Reason for my vote of 4
good question

1 solution

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Maciej Los · Answer 1 · 2012-05-12T03:47:00

Code looks fine... but does your UIContentTypeRow class derives from System.Data.DataRow

Here is a list of useful links:
http://blogs.msdn.com/b/jeff_adkins/archive/2004/03/15/89825.aspx[^]
http://msdn.microsoft.com/pl-pl/magazine/cc301565%28en-us%29.aspx[^]
How do I provide custom cast support for my class?[^]
Convert Base Type to Derived Type[^]
http://www.diaryofaninja.com/blog/2010/03/24/the-black-arts-of-custom-type-conversion-in-c[^]