将long转换为Intptr会给出错误 [英] Convert long to Intptr giving an error

问题描述

在此行中，我尝试将Long转换为Intptr(它抛出类似 long无法转换为Intptr 的错误)

Marshal.Copy(byteArray, tmpBmp.Width * (tmpBmp.Height - 1 - i), DirectCast(CLng(bmpDat1.Scan0) + tmpBmp.Width * i, IntPtr), tmpBmp.Width)<br />

任何人都可以修复它吗?
谢谢

解决方案

  Dim  x  IntPtr 
 Dim  y  As  整数 =  123 
x = 新建  IntPtr (y)

编辑==============

由于您正在调用的方法(Marshal.Copy)采用的是IntPtr，因此您不应将计算结果作为long开头.

 Dim 值  as 整数= bmpDat1.Scan0 + tmpBmp.Width * i
Marshal.Copy(byteArray，tmpBmp.Width *(tmpBmp.Height- 1 -i)， new   IntPtr (值)，tmpBmp.Width)

Hi,

In this line I am trying to convert Long to Intptr (it is throwing a error like long cannot be converted to Intptr)

Marshal.Copy(byteArray, tmpBmp.Width * (tmpBmp.Height - 1 - i), DirectCast(CLng(bmpDat1.Scan0) + tmpBmp.Width * i, IntPtr), tmpBmp.Width)<br />

Can anyone please fix it?
Thank you

解决方案

Dim x As IntPtr
Dim y As Integer = 123
x = New IntPtr(y)

EDIT ==============

Since the method you''re calling (Marshal.Copy) takes an IntPtr, you shouldn''t be making the calculation result a long to begin with.

Dim value as Integer = bmpDat1.Scan0 + tmpBmp.Width * i
Marshal.Copy(byteArray, tmpBmp.Width * (tmpBmp.Height - 1 - i), new IntPtr(value), tmpBmp.Width)

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