＆QUOT;参数无效＆QUOT;从System.Drawing.Image.FromStream异常（）方法 [英] "Parameter is not valid" exception from System.Drawing.Image.FromStream() method

问题描述

我有一个困难时期，在我的网站上Image.FromStream方法。下面的code完美的作品在我的电脑上。但是，当我上传到测试服务器，它总是给我参数无效的异常。

I got a hard time with the Image.FromStream method in my website. The code below works perfect on my computer. But when I uploaded it to the test server, it always gives me "Parameter not valid" exception.

if (!afuImageFile.IsUploading && afuImageFile.HasFile)
{
    System.Drawing.Image imgFile = System.Drawing.Image.FromStream(afuImageFile.FileContent);
}

在Ajax工具包的 afuImageFile 是 AsynFileUploader 控制。 afuImageFile.FileContent 是 HttpInputStream 。我想我需要一些权限添加到某个文件夹。谁能帮我？

the afuImageFile is an AsynFileUploader control in Ajax Tool Kits. afuImageFile.FileContent is a HttpInputStream. I guess I need to add some permission to some folder. Can anyone help me?

推荐答案

请确保您的 FileContent 流作为其位置设置为0。

Please ensure that your FileContent stream as its position set to 0.

否则，你可能要通过更改电话停用图像验证：

Otherwise, you might want to deactivate image validation by changing the call from:

System.Drawing.Image imgFile = System.Drawing.Image.FromStream(afuImageFile.FileContent);

到

System.Drawing.Image imgFile = System.Drawing.Image.FromStream(afuImageFile.FileContent, true, false);

请参阅 图像。 FromStream 以检查其他重载。

See Image.FromStream to check on the other overloads.

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