如果服务器上安装了RAR程序，那么可以调用RAR实现文件压缩与解压缩。
不过要注意的是，由于Web程序不能直接调用客户端的程序（除非用ActiveX，ActiveX几乎被废弃），所以如果要想实现让用户把本地文件用网页解压缩只有把文件上传到服务器上再调用服务器上的RAR压缩，同理要解压缩本地的RAR文件可以把文件上传到服务器解压再拿回来。
本文讲怎么在服务器端的目录解压缩文件！
效果图：
前台代码：
<%...@PageLanguage="C#"AutoEventWireup="true"CodeFile="Default.aspx.cs"Inherits="_Default"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="/1999/xhtml">
<headrunat="server">
<title>服务器端解压缩清清月儿/21aspnet/</title>
</head>
<body>
<formid="form1"runat="server">
<div>
<asp:ButtonID="Button1"runat="server"OnClick="Button1_Click"Text="压缩"/>
<asp:ButtonID="Button2"runat="server"OnClick="Button2_Click"Text="解压缩"/></div>
</form>
</body>
</html>
后台代码：
usingSystem;
usingSystem.Data;
usingSystem.Configuration;
usingSystem.Web;
usingSystem.Web.Security;
usingSystem.Web.UI;
usingSystem.Web.UI.WebControls;
usingSystem.Web.UI.WebControls.WebParts;
usingSystem.Web.UI.HtmlControls;
usingSystem.IO;
usingSystem.Runtime.InteropServices;
usingMicrosoft.Win32;
usingSystem.Diagnostics;
publicpartialclass_Default:System.Web.UI.Page
...{
protectedvoidPage_Load(objectsender,EventArgse)
...{
//清清月儿/21aspnet/
}
protectedvoidButton1_Click(objectsender,EventArgse)
...{
//压缩
Stringthe_rar;
RegistryKeythe_Reg;
Objectthe_Obj;
Stringthe_Info;
ProcessStartInfothe_StartInfo;
Processthe_Process;
try
...{
the_Reg=Registry.ClassesRoot.OpenSubKey("Applications\WinRAR.exe\Shell\Open\Command");
the_Obj=the_Reg.GetValue("");
the_rar=the_Obj.ToString();
the_Reg.Close();
the_rar=the_rar.Substring(1,the_rar.Length-7);
the_Info="a"+"1.rar"+""+"C:\1\1.txt";
the_StartInfo=newProcessStartInfo();
the_StartInfo.FileName=the_rar;
the_StartInfo.Arguments=the_Info;
the_StartInfo.WindowStyle=ProcessWindowStyle.Hidden;
the_StartInfo.WorkingDirectory="C:\1";//获取或设置要启动的进程的初始目录。
the_Process=newProcess();
the_Process.StartInfo=the_StartInfo;
the_Process.Start();
Response.Write("压缩成功");
}
catch(Exceptionex)
...{
Response.Write(ex.ToString());
}
}
protectedvoidButton2_Click(objectsender,EventArgse)
...{
//解压缩
Stringthe_rar;
RegistryKeythe_Reg;
Objectthe_Obj;
Stringthe_Info;
ProcessStartInfothe_StartInfo;
Processthe_Process;
try
...{
the_Reg=Registry.ClassesRoot.OpenSubKey("Applications\WinRar.exe\Shell\Open\Command");
the_Obj=the_Reg.GetValue("");
the_rar=the_Obj.ToString();
the_Reg.Close();
the_rar=the_rar.Substring(1,the_rar.Length-7);
the_Info="X"+"1.rar"+""+"C:\1";
the_StartInfo=newProcessStartInfo();
the_StartInfo.FileName=the_rar;
the_StartInfo.Arguments=the_Info;
the_StartInfo.WindowStyle=ProcessWindowStyle.Hidden;
the_Process=newProcess();
the_Process.StartInfo=the_StartInfo;
the_Process.Start();
Response.Write("解压缩成功");
}
catch(Exceptionex)
...{
Response.Write(ex.ToString());
}
}
}
服务器端目录：
客户端解压缩的变通方法：
