我收到链接器错误：错误LNK2020：未解析的令牌（060001A9）getthumbnailimage [英] I am getting linker error as : error LNK2020: unresolved token (060001A9) getthumbnailimage

问题描述

我正在使用Drawing GetThumbnailImage为我的工具提示控件创建一个图像缩略图图像作为背景图像。我还包含了与我的文件相关的多个.h文件。



我尝试了什么：



我试过了

  public ：
 Image ^ GetThumbnailImage（
  int  thumbWidth，
  int  thumbHeight，
 Image :: GetThumbnailImageAbort ^ callback，
  IntPtr  callbackData）; 
 
 Image :: GetThumbnailImageAbort ^ callback =  gcnew  Image :: GetThumbnailImageAbort（ThumbnailCallback）; 
位图^ myBitmap =  gcnew 位图（  image.jpg的）; 
 System :: Drawing :: Image ^ pThumbnail = 
 myBitmap-> GetThumbnailImage（ 50 ， 50 ，回调， IntPtr  :: Zero）; 
 e-> Graphics-> DrawImage（pThumbnail， 96 ， 96 ）; 

解决方案

您必须在代码中实现annonced ThumbnailCallback 功能。

< pre lang =c ++> Image :: GetThumbnailImageAbort ^ callback = gcnew Image :: GetThumbnailImageAbort（ThumbnailCallback）; // 你需要实现这个功能!!!

看其他了解详情。这些函数必须返回一个bool。 False意味着不中止。

I am creating an image Thumbnail Image for my tooltip control as background image using Drawing GetThumbnailImage.Also i have included multiple .h files related to my file.

What I have tried:

I have tried

public:
	Image^ GetThumbnailImage(
	int thumbWidth,
	int thumbHeight,
	Image::GetThumbnailImageAbort^ callback,
	IntPtr callbackData);

Image::GetThumbnailImageAbort^ callback =  gcnew Image::GetThumbnailImageAbort(ThumbnailCallback);
Bitmap^ myBitmap = gcnew Bitmap("image.jpg");
System::Drawing::Image^ pThumbnail =
 myBitmap->GetThumbnailImage(50,50,callback,IntPtr::Zero);
e->Graphics->DrawImage(pThumbnail,96,96);

解决方案

You must implement the annonced ThumbnailCallback function in your code.

Image::GetThumbnailImageAbort^ callback =  gcnew Image::GetThumbnailImageAbort(ThumbnailCallback);//you need to implement the function!!!

Look here for the details. The functions must return a bool. False means not to abort.

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