From a75e7c15ca217e88532bdb87a21afd058d2f6f4f Mon Sep 17 00:00:00 2001
From: falcon <9504402@qq.com>
Date: Thu, 2 Mar 2023 10:40:29 +0800
Subject: [PATCH] =?UTF-8?q?=E7=B3=BB=E7=BB=9F=E6=96=B9=E6=B3=95=EF=BC=8C?=
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---
 Falcon.SugarApi.Windows/FileExtend.cs | 36 +++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Falcon.SugarApi.Windows/FileExtend.cs

diff --git a/Falcon.SugarApi.Windows/FileExtend.cs b/Falcon.SugarApi.Windows/FileExtend.cs
new file mode 100644
index 0000000..b67047c
--- /dev/null
+++ b/Falcon.SugarApi.Windows/FileExtend.cs
@@ -0,0 +1,36 @@
+using System.Runtime.InteropServices;
+
+namespace Falcon.SugarApi.Windows
+{
+    /// <summary>
+    /// 文件操作扩展
+    /// </summary>
+    public static class FileExtend
+    {
+        [DllImport("kernel32.dll")]
+        private static extern IntPtr _lopen(string lpPathName,int iReadWrite);
+
+        [DllImport("kernel32.dll")]
+        private static extern bool CloseHandle(IntPtr hObject);
+
+        /// <summary>
+        /// 判断文件是否打开，并可选是否关闭
+        /// </summary>
+        /// <param name="path">文件路径</param>
+        /// <param name="close">True关闭文件，不关闭。默认不关闭</param>
+        /// <returns>True文件打开，False文件没有打开</returns>
+        public static bool IsOpen(this string path,bool close = false) {
+            if(!File.Exists(path)) {
+                return false;
+            }
+            var handle = _lopen(path,2|0x40);
+            if(handle==new IntPtr(-1)) {
+                return true;
+            }
+            if(close) {
+                CloseHandle(handle);
+            }
+            return false;
+        }
+    }
+}