将IntPtr值转换为Int32 [英] Converting IntPtr value to Int32

问题描述

亲爱的所有人，

我正在尝试将IntPtr值转换为Int32，但是代码抛出异常:

无法将类型为"System.IntPtr"的对象强制转换为类型为"System.IConvertible"的对象"

在线:

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


请帮助解决问题.

提前谢谢您.

IB

解决方案

IntPtr具有ToInt32()和ToInt64()方法.

  IntPtr  ip =( IntPtr ) int  i = Convert.ToInt32(ip); // 将给出运行时异常.
 int  j =( int )ip; // 会工作 

public static explicit operator int (
	IntPtr value
);

http://msdn.microsoft.com/en-us/library/9a8d37fb.aspx [ ^ ]
那应该做.

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

解决方案

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

Cast it instead of trying to Convert it:

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

public static explicit operator int (
	IntPtr value
);

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

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