判断回收站是否为空代码,CSharp代码库,德仔网

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【CSharp】判断回收站是否为空

作者:using System; / 发布于2011/7/20/ 717

C#判断回收站是否为空，是需要使用Windows API的，SHQueryRecycleBin

<div><span style="color: blue">using </span>System;
<span style="color: blue">using </span>System.Runtime.InteropServices;

<span style="color: gray">///</span><span style="color: green">C# 判断回收站是否为空
</span><span style="color: gray">///</span><span style="color: green">作者：三角猫</span><span style="color: green">
</span><span style="color: blue">namespace </span>判断回收站是否为空
{
 <span style="color: blue">class </span><span style="color: rgb(43,145,175)">Program
 </span>{
 [<span style="color: rgb(43,145,175)">StructLayout</span>(<span style="color: rgb(43,145,175)">LayoutKind</span>.Explicit, Size = 20, Pack=4)]
 <span style="color: blue">public struct </span><span style="color: rgb(43,145,175)">SHQUERYRBINFO
 </span>{
 [<span style="color: rgb(43,145,175)">FieldOffset</span>(0)]
 <span style="color: blue">public int </span>cbSize;
 [<span style="color: rgb(43,145,175)">FieldOffset</span>(4)]
 <span style="color: blue">public long </span>i64Size;
 [<span style="color: rgb(43,145,175)">FieldOffset</span>(12)]
 <span style="color: blue">public long </span>i64NumItems; <span style="color: green">//回收站中的内容数目，为0则表示为空
 </span>}

 [<span style="color: rgb(43,145,175)">DllImport</span>(<span style="color: rgb(163,21,21)">"shell32.dll"</span>)]
 <span style="color: blue">static extern int </span>SHQueryRecycleBin(<span style="color: blue">string </span>pszRootPath, <span style="color: blue">ref </span><span style="color: rgb(43,145,175)">SHQUERYRBINFO </span>pSHQueryRBInfo);

 <span style="color: blue">static void </span>Main(<span style="color: blue">string</span>[] args)
 {
 <span style="color: blue">if </span>(IsRecyleBinEmpty())
 <span style="color: rgb(43,145,175)">Console</span>.Write(<span style="color: rgb(163,21,21)">"回收站为空"</span>);
 <span style="color: blue">else
 </span><span style="color: rgb(43,145,175)">Console</span>.Write(<span style="color: rgb(163,21,21)">"回收站非空"</span>);

 <span style="color: rgb(43,145,175)">Console</span>.ReadKey();
 }

 <span style="color: blue">static </span><span style="color: rgb(43,145,175)">Boolean </span>IsRecyleBinEmpty()
 {
 <span style="color: rgb(43,145,175)">SHQUERYRBINFO </span>sqrbi = <span style="color: blue">new </span><span style="color: rgb(43,145,175)">SHQUERYRBINFO</span>();
 sqrbi.cbSize = <span style="color: rgb(43,145,175)">Marshal</span>.SizeOf(<span style="color: blue">typeof</span>(<span style="color: rgb(43,145,175)">SHQUERYRBINFO</span>));
 <span style="color: blue">int </span>hResult = SHQueryRecycleBin(<span style="color: blue">string</span>.Empty, <span style="color: blue">ref </span>sqrbi);
 <span style="color: blue">if </span>(hResult == 0)
 {
 <span style="color: blue">return</span>(sqrbi.i64NumItems <= 0);
 }

 <span style="color: blue">throw new </span><span style="color: rgb(43,145,175)">Exception</span>(<span style="color: rgb(163,21,21)">"查询回收站发生错误！"</span>);
 }
 }
}

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