You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.1 KiB
C#
41 lines
1.1 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Runtime.InteropServices;
|
|
using System.IO;
|
|
|
|
namespace demo.ClassHelper.FileOperate
|
|
{
|
|
class FileOpen
|
|
{
|
|
[DllImport("kernel32.dll")]
|
|
private static extern IntPtr _lopen(string lpPathName, int iReadWrite);
|
|
|
|
[DllImport("kernel32.dll")]
|
|
private static extern bool CloseHandle(IntPtr hObject);
|
|
|
|
public static int OF_READWRITE = 2;
|
|
public static int OF_SHARE_DENY_NONE = 0x40;
|
|
public static IntPtr HFILE_ERROR = new IntPtr(-1);
|
|
|
|
//txt文件没有handle;
|
|
|
|
public static int VerifyFileIsOpen(string strFileName)
|
|
{
|
|
if (!File.Exists(strFileName))
|
|
{
|
|
return -1;
|
|
}
|
|
IntPtr vHandle = _lopen(strFileName, OF_READWRITE | OF_SHARE_DENY_NONE);
|
|
if (vHandle == HFILE_ERROR)
|
|
{//文件已经打开
|
|
return 1;
|
|
}
|
|
CloseHandle(vHandle);
|
|
//文件未打开，并且可用
|
|
return 0;
|
|
}
|
|
}
|
|
}
|