将PictureControl的内容保存到BitMap文件中 [英] Save the content of PictureControl to a BitMap file

问题描述

大家好，

我如何保存Picture控件中存在的图像的内容，我尝试了以下代码，但无法保存正确的图像.我只得到了黑色图像.

Hi all,

How can i save the content of the image present in the Picture control, i tried the following code but not able to save correct image.i am getting only Black image.

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CWnd* pWnd = GetDlgItem(IDC_PICTURE);<br />
<br />
HWND hWnd = pWnd->GetSafeHwnd();<br />
<br />
HDC hdc= ::GetDC(hWnd);<br />
<br />
cdc.Attach(hdc);<br />
<br />
MemDC.CreateCompatibleDC(&cdc);<br />
<br />
CBitmap Bmp;<br />
<br />
Bmp.CreateCompatibleBitmap(&cdc,w,b);<br />
<br />
CBitmap *pOldBitmap = MemDC.SelectObject(&Bmp);<br />
<br />
cdc.BitBlt(0,0,w,b,&MemDC,0,0,SRCCOPY);<br />
<br />
MemDC.SelectObject(pOldBitmap);<br />
<br />
CImage Image;<br />
<br />
Image.Attach((HBITMAP)Bmp.Detach());<br />
<br />
Image.Save(L"C:\\image.bmp");<br />
<br />

谢谢
Karthik

Thanks
Karthik

推荐答案

看起来像是在以错误的方式发li.

Looks like you are blitting the wrong way.

MemDC.BitBlt(0,0,w,b,&cdc,0,0,SRCCOPY);

此外，您还需要进行一些清理，但也许您已经这样做了.

Also you need some cleaning up, but maybe you already do that.

尼克拉斯，

我更改了blitting，但是没有用，是的，清理工作已经进行了，但没有在示例代码中进行.

Hi Niklas,

I changed the blitting but no use, Yes the cleanup has been taken care, but not in the sample code.

这是为您提供的替代解决方案:

Here is an alternate solution for you:

CStatic *pStatic = static_cast<CStatic*>(GetDlgItem(IDC_PICTURE));
CImage image;
image.Attach(pStatic->GetBitmap());
image.Save("C:\\image.bmp");
image.Detach();

假设您的控件中有一个位图.您可能需要验证GetBitmap()调用.

assuming you have a bitmap in your control. You might need to verify the GetBitmap() call.

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