用windows服务去云上面下载图片的时候报错如下

System.ArgumentException: URI formats are not supported.
at System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength)
at System.IO.Path.GetFullPath(String path)
at System.Drawing.IntSecurity.UnsafeGetFullPath(String fileName)
at System.Drawing.IntSecurity.DemandWriteFileIO(String fileName)
at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams)
请问这个是什么问题 ？

地址的问题。你怎么下载的文件？先用webclient.downloadfile下载，才能装入。

http://bbs.csdn.net/topics/260001348

查msdn吧，或者用其他方法，比如wininet或者socket