SHFileOperation / SHFILEOPSTRUCT [英] SHFileOperation/SHFILEOPSTRUCT

问题描述

我试图将目录复制到新位置。所以我使用SHFileOperation / SHFILEOPSTRUCT如下：

  SHFILEOPSTRUCT sf; 
 memset（& sf，0，sizeof（sf））; 
 sf.hwnd = 0; 
 sf.wFunc = FO_COPY; 
 dirName + =\\ *。*; 
 sf.pFrom = dirName.c_str（）; 
 string copyDir = homeDir +\\CopyDir; 
 sf.pTo = copyDir.c_str（）; 
 sf.fFlags = FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_NOERRORUI; 
 
 int n = SHFileOperation（& sf）; 
 if（n！= 0）
 {
 int x = 0; 
} 
  

所以我设置了上面的值。有一个文件，我创建的文件夹（我已经关闭句柄，所以应该很好移动）。 SHFileOperation调用返回2，但我不能找到解释这些错误代码的地方。有谁知道我可以找出什么2意味着，或任何人有任何想法，为什么它可能不工作？ Cheers

解决方案

错误代码2表示系统找不到指定的文件。

请参阅 Windows系统错误代码错误描述的完整列表，或写一个函数，将获得错误代码的描述：

  std :: string error_to_string（const DWORD a_error_code）
 {
 //获取最后一个Windows错误消息。 
 char msg_buf [1025] = {0}; 
 
 //获取我们的os代码的错误信息。 
 if（FormatMessage（FORMAT_MESSAGE_FROM_SYSTEM，
 0，
 a_error_code，
 0，
 msg_buf，
 sizeof（msg_buf） -  1，
 0 ））
 {
 //删除后面的换行符。 
 char * nl_ptr = 0; 
 if（0！=（nl_ptr = strchr（msg_buf，'\\\
'）））
 {
 * nl_ptr ='\0'; 
} 
 if（0！=（nl_ptr = strchr（msg_buf，'\r'）））
 {
 * nl_ptr ='\0' 
} 
 
 return std :: string（msg_buf）; 
} 
 
 return std :: string（无法获取错误消息）; 
} 
  

从阅读 SHFileOperation 为 pTo 指定的字符串， code>和 pFrom 必须是双空终止：yours只是单终止。尝试以下操作：

  dirName.append（1，'\0'）; 
 sf.pFrom = dirName.c_str（）; 
 string copyDir = homeDir +\\CopyDir; 
 copyDir.append（1，'\0'）; 
 sf.pTo = copyDir.c_str（）; 
  




Im trying to copy a directory to a new location. So I am using SHFileOperation/SHFILEOPSTRUCT as follows:

SHFILEOPSTRUCT sf;
memset(&sf,0,sizeof(sf));
sf.hwnd = 0;
sf.wFunc = FO_COPY;
dirName += "\\*.*";
sf.pFrom = dirName.c_str();
string copyDir = homeDir + "\\CopyDir";
sf.pTo = copyDir.c_str();
sf.fFlags = FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_NOERRORUI;

int n = SHFileOperation(&sf);
if(n != 0)
{
    int x = 0;
}

So I set the values as above. There is a file I created in the folder (I have closed the Handle so it should be fine to move). The SHFileOperation call is returning 2, but I cant find anywhere where these error codes are explained. Does anyone know where I can find out what 2 means, or does anyone have any ideas why it might not be working? Cheers

解决方案

Error code 2 means The system cannot find the file specified.

See Windows System Error Codes for full listing of error descriptions, or write a function that will obtain the description for the error code:

std::string error_to_string(const DWORD a_error_code)
{
    // Get the last windows error message.
    char msg_buf[1025] = { 0 };

    // Get the error message for our os code.
    if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 
                      0,
                      a_error_code,
                      0,
                      msg_buf,
                      sizeof(msg_buf) - 1,
                      0))
    {
        // Remove trailing newline character.
        char* nl_ptr = 0;
        if (0 != (nl_ptr = strchr(msg_buf, '\n')))
        {
            *nl_ptr = '\0';
        }
        if (0 != (nl_ptr = strchr(msg_buf, '\r')))
        {
            *nl_ptr = '\0';
        }

        return std::string(msg_buf);
    }

    return std::string("Failed to get error message");
}

From reading the documentation for SHFileOperation the strings specified for pTo and pFrom must be double null terminated: yours are only singly null terminated. Try the following:

dirName.append(1, '\0');
sf.pFrom = dirName.c_str();
string copyDir = homeDir + "\\CopyDir";
copyDir.append(1, '\0');
sf.pTo = copyDir.c_str();

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