使用場景:
導出文件,在相同路徑下有同名文件已經被打開,文件被佔用,crash;
檢測導出的文件是否已被佔用在決定文件是否允許導出。
[DllImport("kernel32.dll")]
public static extern IntPtr _lopen(string lpPathName, int iReadWrite);
[DllImport("kernel32.dll")]
public static extern bool CloseHandle(IntPtr hObject);
public const int OF_READWRITE = 2;
public const int OF_SHARE_DENY_NONE = 0x40;
public readonly IntPtr HFILE_ERROR = new IntPtr(-1);
/// <summary>
/// 檢測文件被佔用
/// </summary>
/// <param name="FileNames">要檢測的文件路徑</param>
/// <returns></returns>
public bool CheckFiles(string FileNames)
{
if (!File.Exists(FileNames))
{
//文件不存在
return true;
}
IntPtr vHandle = _lopen(FileNames, OF_READWRITE | OF_SHARE_DENY_NONE);
if (vHandle == HFILE_ERROR)
{
//文件被佔用
return false;
}
//文件沒被佔用
CloseHandle(vHandle);
return true;
}