错误：文件路径太长 [英] Error: File Path is Too Long

问题描述

我想使用C＃中的各种文件的功能，如 File.GetLastWriteTime 上放置在路径大于在Windows上最大允许路径7即：该文件，复制命令260.它给我的长路径名称的错误。在MSDN上支持我，他们问的路径之前，使用 \\ \？。我也一样，但我仍然得到了同样的错误，现在看来，这不作任何改变。下面是我的代码。请让我知道如果我使用它正确，或者我需要添加任何东西：

这些所有的lib我使用的代码是有其他的事情也：

i am trying to use the various file functions in C# like File.GetLastWriteTime, copy command on the file placed at the path greater than maximum allowed path on windows 7 i.e 260. Its giving me an error on long path name. On MSDN support i they have asked to use the \\?\ before the path. I did the same but still i got the same error, it seems it doesn't make any change. Below is my code. Please let me know if i am using it correct or i need to add any thing:
These all lib i am using as the code is having other things also:

下面是相应的代码：

filesToBeCopied = Directory.GetFiles(path,"*",SearchOption.AllDirectories);
for (int j = 0; j < filesToBeCopied.Length; j++)
{
    try
    {
        String filepath = @"\\?\" + filesToBeCopied[j];
        File.GetLastWriteTime(filepath);
    }
    catch (Exception ex)
    {
        MessageBox.Show("Error Inside the single file iteration for the path:" +
            filesToBeCopied[j] + " . The exception is :" + ex.Message);
    }
}

其中，作为路径是在Windows的文件夹机器开始驱动器号。为前： D：\abc\bcd\cd\cdc\dc\ ..........

推荐答案

下面是至少您的要求的复制部分的解决方案（谢谢你的pinvoke.net ）：

Here's a solution for at least the copying portion of your request (thank you pinvoke.net):

[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
static extern bool CopyFile(string lpExistingFileName, string lpNewFileName, bool bFailIfExists);

然后到实际拷贝文件：

And then to actually copy your file:

// Don't forget the '\\?\' for long paths
string reallyLongPath = @"\\?\d:\abc\bcd\cd\cdc\dc\..........";
string destination = @"C:\some\other\path\filename.txt";
CopyFile(reallyLongPath , destination, false);

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