System.Drawing.Image.FromFile 本机正常 为什么其它机访问出错???

Question

if (fileEx == "jpg" || fileEx == "bmp" || fileEx == "gif")
                {
                    
                       System.Drawing.Image image, newimage,newimage2;
                    image = System.Drawing.Image.FromFile(filePath);  // 其他机上传时提示出现异常错误,但是本机没问题 ...  问题出在那里？？？？                    System.Drawing.Image.GetThumbnailImageAbort callb = null;
                    newimage = image.GetThumbnailImage(50, 50, callb, new System.IntPtr());
                    newimage2 = image.GetThumbnailImage(100, 100, callb, new System.IntPtr());
                    newimage.Save(serverpath);
                    newimage2.Save(serverpath2);
                    newimage.Dispose();
                    newimage2.Dispose();
                                       
                                    }
                else
                {
                }

Answer 1

以下是报错  本机访问不会出错 ................
-------------------------------------------------------------------------------------------------------说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.IO.FileNotFoundException: D:\Backup\我的文档\My Pictures\pc.jpg源错误: 
行 106:                    //image = System.Drawing.Image.FromFile(filePath);
行 107:                    ////System.Drawing.Image image = System.Drawing.Image.FromFile(filePath);
行 108:                    System.Drawing.Image image = System.Drawing.Image.FromFile(filePath);
行 109:                    //image = System.Drawing.Image.FromFile(Server.MapPath(filePath));
行 110:
 堆栈跟踪: 
[FileNotFoundException: D:\Backup\我的文档\My Pictures\pc.jpg]
   System.Drawing.Image.FromFile(String filename, Boolean useEmbeddedColorManagement) +388162
   System.Drawing.Image.FromFile(String filename) +6
   Users.UploadImage_OnClick(Object sender, EventArgs e) in f:\ASP.NET\txl\Users.aspx.cs:108
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102 

Answer 2

System.Drawing.Image.FromFile
只能获取本机文件~
不能用于上传~

Answer 3

System.Drawing.Image.FromFile();
只能是本地路径！！！

Answer 4

根据大家给的意见：
System.Drawing.Image.FromFile(); 
只能是本地路径！！！没有人给出答案的情况下 ...采取以下方法：就将上传的图片先保存，然后调用处理，处理完后就将原图删除 ...

Answer 5

System.Drawing.Image.FromFile();
只能是本地路径！！！