Converting IntPtr value to Int32

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Dear All,

I am trying to convert IntPtr value to Int32 but the code is throwing exception:

"Unable to cast object of type 'System.IntPtr' to type 'System.IConvertible'"

at line:

"Point p = new Point(LoWord(Convert.ToInt32(lparam)), HiWord(Convert.ToInt32(lparam)));"

Kindly help resolve the problem.

Thanking you in advance.

IB

Posted 30-Mar-12 9:29am

Indrojeet_Bhattacharya

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3 solutions

Solution 2

public static explicit operator int (
	IntPtr value
);

http://msdn.microsoft.com/en-us/library/9a8d37fb.aspx[^]
That should do it.

Posted 30-Mar-12 9:48am

wizardzz

Updated 30-Mar-12 9:49am

v2

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pietvredeveld 30-Mar-12 16:03pm

Nice solution

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Alan N · Accepted Answer · 2012-03-30T10:10:00

Solution 3

IntPtr has the methods ToInt32() and ToInt64().

Posted 30-Mar-12 10:10am

Alan N

Comments

Sergey Alexandrovich Kryukov 30-Mar-12 21:36pm

My 5. Also, it's important to check for 64-bit instruction-set architecture. (See System.Environment.)
--SA

OriginalGriff · Accepted Answer · 2012-03-30T09:43:00

Solution 1

Cast it instead of trying to Convert it:

C#

IntPtr ip = (IntPtr) 123;
int i = Convert.ToInt32(ip);  //Will give a run time exception.
int j = (int)ip;              //Will work

Posted 30-Mar-12 9:43am

OriginalGriff

Comments

Indrojeet_Bhattacharya 30-Mar-12 16:09pm

Thank you very much. The solution worked.

OriginalGriff 31-Mar-12 3:32am

You're welcome!