使用WIA Automation示例时出错 [英] Error Using WIA Automation Samples

问题描述

我将我的机器中的WIA图层示例用于教育目的.但这给了我以下Visual Basic 2008中的错误.此代码中显示的错误

I''m Using WIA Layer Sample in my machine for a educational purpose. But it gives me following Error In Visual Basic 2008. Error Shown on this code

Picture1.BackgroundImage = img.ARGBData.Picture(w, h)

错误是这

Error Is this

Unable to cast COM object of type 'System.__ComObject' to class type 'System.Drawing.Image'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.

推荐答案

您显然有一个错误在img.ARGBData.Picture(w，h)调用中.您确定返回System.Drawing.Image吗?如果不是，则可能需要弄清楚此方法返回的内容，然后弄清楚如何将此返回值强制转换为System.Drawing.Image.
如果您的问题中没有任何更多信息，您将找不到更好的答案.

You obviously have an error in the img.ARGBData.Picture(w, h) call. Are you sure it returns a System.Drawing.Image? If not, perhaps you need to figure out what this method returns and then figure out how to cast this return value to a System.Drawing.Image.
Without any more information in your question, you won''t get a much better answer.

比Marcus 这对我有帮助

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