Azure从blob中提取文件图标 [英] Azure extract the file icon from blob

问题描述

我再次提出问题..



我想从存储在azure blob存储中的文件中提取图标。



行动：

Once again I'm here with a question..

I want to extract the icon from a file that is stored in azure blob storage.

Action:

public FileResult GetUploadedFileIcon(string blobname)
{
    string SASURI = GetUploadedFileIconSASURL(blobname);

    Icon stream = System.Drawing.Icon.ExtractAssociatedIcon(SASURI);
    Bitmap pngIcon = stream.ToBitmap();

    MemoryStream ms = new MemoryStream();
    pngIcon.Save(ms, ImageFormat.Png);

    ms.Position = 0;

    return new FileStreamResult(ms, "image/png");
}

查看：

View:

<img src="@Url.Action("GetUploadedFileIcon", "Home", new { blobname = file.BlobName })" />

问题：



它告诉我图标流为空。 SASURI没有任何问题。我尝试完全删除它并使用公共容器，但这没有帮助。我也尝试从本地存储的文件中获取图标，如下所示：

The problem:

It's telling me icon stream is null. Nothing is wrong with the SASURI. I tried removing it completely and go with public container but that did not help. I also tried getting the icon from a locally stored file, like this:

Icon stream = System.Drawing.Icon.ExtractAssociatedIcon(@"C:\WINDOWS\system32\notepad.exe");

这样有用..



所有blob的内容类型都是正确的，textfiles是text / plain等。



当我尝试从blob中提取图标时，为什么我的图标会显示空值？



我一如既往地感谢所有帮助！



谢谢

And that worked..

The content type for all the blobs are correct, textfiles are text/plain etc.

Why am i getting null value on my icon when I try to extract the icon from a blob?

And as always i appreciate all the help I can get!!

Thanks

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