使用rar.exe压缩的例子

需要保证rar.exe在网站目录下

<form id="form1" runat="server">
    <div>
        <asp:FileUpload ID="FileUpload1" runat="server" />
        加密密码<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div>
    </form>

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Diagnostics;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string filename = "test.rar";
        //FileUpload1.SaveAs(Server.MapPath("test.xls"));
        //if (System.IO.File.Exists(Server.MapPath(filename)))
        //   System.IO.File.Delete(Server.MapPath(filename));
        System.Diagnostics.Process Process1 = new System.Diagnostics.Process();
        Process1.StartInfo.UseShellExecute = false;
        Process1.StartInfo.RedirectStandardInput = true;
        Process1.StartInfo.RedirectStandardOutput = true;
        Process1.StartInfo.RedirectStandardError = true;
        Process1.StartInfo.CreateNoWindow = true;
        Process1.StartInfo.FileName = Server.MapPath("rar.exe");
        Process1.StartInfo.Arguments = "a -p" + this.TextBox1.Text + " -ep \"" + Server.MapPath("test.rar") + "\" \"" + Server.MapPath("test.xls") + "\"";

        Process1.Start();

        while (!Process1.HasExited)
        {

            //Response.Write(Process1.StandardOutput.ReadToEnd());

        }

        Process1.Close();

        Response.Clear();
        Response.AddHeader("Content-Disposition", "inline; filename=" + Server.UrlEncode(filename));
        Response.ContentType = "application/x-tar";
        if (System.IO.File.Exists(Server.MapPath(filename)))
            Response.WriteFile(filename);
    }
}