从流中获取图像时参数无效 [英] Parameter is not valid when getting image from stream

问题描述

我有这个代码:

              MemoryStream ms = new MemoryStream(newbytes, 0,
            newbytes.Length);
              ms.Position = 0;      
        ms.Write(newbytes, 0, newbytes.Length);
              Image img = Image.FromStream(ms);
            img.Save(@"C:\Users\gsira\Pictures\Blue hills5.jpg");

我在 Image.FromStream(ms) 调用中收到此错误:

I get this error at the Image.FromStream(ms) call:

System.ArgumentException:参数无效.在 System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateIma

System.ArgumentException: Parameter is not valid. at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateIma

我该如何解决这个问题?解决这个问题的几个链接(一个在 MSDN 线程上)被破坏了，所以我迷路了.

How can I resolve this? A couple of links which solve this problem (one on an MSDN thread) are broken so I am lost.

推荐答案

如果您使用字节数组(我假设 newbytes 是这样)初始化 MemoryStream，则不需要写信给它.

If you initialise a MemoryStream with a byte array (which is what I am assuming newbytes to be), you should not need to write to it.

示例中对 Write(newbytes, 0, newbytes.Length) 的调用是完全多余的.

The call to Write(newbytes, 0, newbytes.Length) in your sample is completely redundant.

var s = new MemoryStream(newbytes, 0, newbytes.Length);
var i = Image.FromStream(s);

i.Save(@"C:\Users\gsira\Pictures\Blue hills5.jpg");

以上对我有用，其中 newbytes 是我硬盘上图像文件内容的字节数组.

The above works for me where newbytes is a byte array of the contents of an image file on my hard drive.

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