System.Drawing.Bitmap.GetHicon() 上的 GDI 对象泄漏

Question

我见过类似的问题，但 none 满足我的情况。

我正在修复 C++ Windows 表单应用程序上的 GDI 对象泄漏。

这是它抛出的异常：

A generic error occurred in GDI+. at System.Drawing.Bitmap.GetHicon()

这是在发生崩溃的那一行的 GetHicon 调用：

this->notifyIcon1->Icon=Icon->FromHandle(((Bitmap^)imgsApp->Images[0])->GetHicon());

阅读此处和 https://docs.microsoft.com/en-us/dotnet/api/system.drawing.icon.fromhandle?view=net-5.0 后，我发现我需要调用 DestroyIcon() 才能释放图标句柄（不确定此处的措辞是否正确），但我由于不熟悉 Windows 表格，我无法做到这一点。

Answer 1

试试这个：

IntPtr iconHandle = ((Bitmap^)imgsApp->Images[0])->GetHicon();
Icon ^newIcon = Icon::FromHandle(iconHandle);
this->notifyIcon1->Icon = (Icon^) newIcon->Clone();
newIcon->Dispose();
DestroyIcon((HICON)iconHandle.ToPointer());

根据 :

Conclusion: After Icon.FromHandle, the field ownHandle is false, and thus Dispose / FromHandle won't call DestroyIcon

Therefore: if you create an Icon using Icon.FromHandle you'll have to Dispose() the Icon as well as call DestroyIcon, just as the remarks section says

System.Drawing.Bitmap.GetHicon() 上的 GDI 对象泄漏

GDI Object leak on System.Drawing.Bitmap.GetHicon()

c++

gdi

winforms