系统错误124 - ERROR_INVALID_LEVEL与SHFileOperation

问题描述

我使用 SHFileOperation 时遇到问题：。我得到了工作，但我现在试图把它放入一个函数，因为它将在我的代码中使用几次。函数是：

  void SHFileOperationFunc（string item1，string item2，int operation）
 {
 SHFILEOPSTRUCT sf; 
 memset（& sf，0，sizeof（sf））; 
 sf.hwnd = 0; 
 sf.fFlags = FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_NOERRORUI; 
 
 switch（operation）
 {
 case 1：
 
 case 2：
 sf.wFunc = FO_COPY; 
 string files = item1 +\\ *。*; 
 files.append（1，'\0'）; 
 sf.pFrom = files.c_str（）; 
 item2.append（1，'\0'）; 
 sf.pTo = item2.c_str（）; 
} 
 
 int opOkay = SHFileOperation（& sf）; 
 if（opOkay！= 0）
 {
 // FAIL 
} 
  

}

当我有代码之外的函数，它工作正常。但现在，它是如上我得到一个错误返回opOkay。错误值为124，表示ERROR_INVALID_LEVEL - 系统调用级别不正确。我不知道这是什么意思。 Google也没有太大的帮助。

也应该使用 SHFileOperation ，否则我应该使用 IFileOperation ？

干杯。

解决方案

p>问题是文件将在开关块结束时超出作用域， sf.pFrom 悬停指针。将文件的声明移动到开关之外。

注意，您在开关块中没有 break >

I was having a problem with using SHFileOperation: SHFileOperation/SHFILEOPSTRUCT. I got that working but I am now trying to put that into a function as it will be used several times throughout my code. The functions is:

void SHFileOperationFunc(string item1, string item2, int operation)
{
    SHFILEOPSTRUCT sf;
    memset(&sf,0,sizeof(sf));
    sf.hwnd = 0;
    sf.fFlags = FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_NOERRORUI;

    switch(operation)
    {
    case 1:

    case 2:
        sf.wFunc = FO_COPY;
        string files = item1 + "\\*.*";
        files.append(1, '\0');
        sf.pFrom = files.c_str();
        item2.append(1, '\0');
        sf.pTo = item2.c_str();
    }

    int opOkay = SHFileOperation(&sf);
    if(opOkay != 0)
    {
        //FAIL
    }

}

When I had the code outside the function it worked fine. But now that it is as above i get an error returned to opOkay. The error value is 124 which means ERROR_INVALID_LEVEL - The system call level is not correct. I dont know what this means. Google hasnt been much help either. Anyone enlighten me?

Also should i be using SHFileOperation at all or should I be using IFileOperation?

Cheers.

解决方案

The problem is that files will go out of scope when the switch block ends and sf.pFrom will be a dangling pointer. Move declaration of files to outside of the switch.

Note you have no breaks in either of the switch blocks.

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