file.copy()方法异常 [英] file.copy() method exception

问题描述

大家好
我必须将图像文件从一个文件夹复制到另一个文件夹

hi all
i have to copy an image file from one folder to another folder

if (isPath.Contains(@"\"))
                {
                    string path = System.Web.Configuration.WebConfigurationManager.AppSettings["ImgPath"].ToString();
                    DirectoryInfo di = new DirectoryInfo(path+@"\"+isPath);
                    DirectoryInfo di1 = new DirectoryInfo(path+@"\Bilder\");
                    var directories = di.GetFiles("*", SearchOption.AllDirectories);
                    foreach (FileInfo d in directories)
                    {
                        if (d.Extension == ".jpg")//Bilder
                        {
                            CreateFolder("Bilder");
                           // File.Open(d.FullName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
                            File.OpenRead(d.FullName);
                           // File.OpenWrite(@"D:\Projects\EFO\Project_Synchronizer\Synchronizer WEB\otraWebService\otraWebService\Bilder\");
                           // File.Open(di1.FullName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite);
                            System.IO.File.Copy(d.FullName, @"D:\Projects\EFO\Project_Synchronizer\Synchronizer WEB\otraWebService\otraWebService\Bilder");
                            //File.Copy(
                        }
                        else if (d.Extension == ".xml")//EFOEksport
                        {
                            CreateFolder("EFOEksport");
                            System.IO.File.Copy(d.FullName, d.Directory.Name, false); 
                        }
                        else
                        {
                            //Nothing
                        }
                    }

会引发异常
找不到路径的一部分

plz help [已消除紧急性]

it throws an exception
could not find a part of path

plz help [Removed urgency]

推荐答案

File.Copy 需要绝对路径("C:\ Users \ Desktop \ testFolder").当给定File.Copy的路径是相对路径(/testfolder)时，它将引发异常找不到路径的一部分".

在您的情况下，只需确保给出的路径是绝对的即可.这将解决您的问题.

File.Copy require absolute path("C:\Users\Desktop\testFolder"). when the path given to File.Copy is relative(/testfolder), it will throw an exception "could not find a part of path".

In your case just make sure that the path given is absolute. This will fix your issue.

我看到了几个问题...

1)File.OpenRead返回为System.IO.FileStream，现在对该文件具有锁定，直到关闭流为止，您将收到一个有关文件正在被另一个进程使用的异常.我看不到您正在阅读文件，因此请忽略.

2)System.IO.File.Copy必须同时具有两个参数的文件名，您不能使用目标目录，还必须添加目标文件名
例如

I see a couple of issues...

1) File.OpenRead returns as System.IO.FileStream and now has a lock on that file until the stream is closed, you will receive an exception about the file is in use by another process. I do not see you reading the file so ommit that.

2) The System.IO.File.Copy needs to have a file name for both parameters, you cannot use a destination directory you must add the destination filename as well
e.g.

System.IO.File.Copy(d.FullName, @"D:\Projects\EFO\Project_Synchronizer\Synchronizer WEB\otraWebService\otraWebService\Bilder\" + d.Name;);

foreach (FileInfo d in directories)
                   {
                       if (d.Extension == ".jpg")//Bilder
                       {
                           CreateFolder("Bilder");
                                                     File.OpenRead(d.FullName); 
                           //you may want to check if file exists at destination already and implement action based on that (overwrite or rename with numeric copy value file(Copy 1).ext etc. just a suggestion to avoid exceptions in future                          
                           System.IO.File.Copy(d.FullName, @"D:\Projects\EFO\Project_Synchronizer\Synchronizer WEB\otraWebService\otraWebService\Bilder\" + d.Name);
                           
                       }

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