求救，这个怎么获取文件名？？

[我说我行就是行]

我这个是上传视频的一个代码！期间，我要判断视频格式，如果是avi的可以通过，否则，弹出一个警告，只能上传avi的
前台代码

  <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"
         codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0"
         width="550" height="100" id="fileUpload" align="middle">
            <param name="allowScriptAccess" value="sameDomain" />
            <param name="movie" value="fileUpload.swf" />
            <param name="quality" value="high" />
            <param name="wmode" value="transparent">
            <PARAM NAME=FlashVars VALUE='uploadPage=Upload.axd<%=GetFlashVars()%>&completeFunction=UploadComplete()'>
            <embed src="fileUpload.swf"
             FlashVars='uploadPage=Upload.axd<%=GetFlashVars()%>&completeFunction=UploadComplete()'
             quality="high" wmode="transparent" width="550" height="100" 
             name="fileUpload" align="middle" allowScriptAccess="sameDomain" 
             type="application/x-shockwave-flash" 
             pluginspage="http://www.macromedia.com/go/getflashplayer" />
        </object>
     
        <asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click"></asp:LinkButton>

后台：

 protected void Page_Load(object sender, EventArgs e)
    {


        string jscript = "function UploadComplete(){";
        jscript += string.Format("__doPostBack('{0}','');", LinkButton1.ClientID.Replace("_", "$"));

        jscript += "};";
        Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "FileCompleteUpload", jscript, true);
    }
    protected string GetFlashVars()
    {

        return "?" + Server.UrlEncode(Request.QueryString.ToString());
    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {
       //这里面不知道怎么写，就是获取上传的文件名或者在这里面判断，如果获取cc.rmvb的话，
//我就可以这样写了
string avi = "cc.rmvb";
               
                string c = avi.Substring(avi.LastIndexOf("."));
if(c!=".avi")
{
弹出警告
}else
{
弹出上传成功
}


现在的问题，就是怎么获取？？？请各位大侠帮个忙撒！


    }
   

UpLoad.cs

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.IO;

public class Upload : IHttpHandler
{
    public Upload()
    {
    }

    #region IHttpHandler Members

    public bool IsReusable
    {
        get { return true; }
    }

    public void ProcessRequest(HttpContext context)
    {
        if (context.Request.Files.Count > 0)
        {
            string tempFile = context.Request.PhysicalApplicationPath;
            for (int j = 0; j < context.Request.Files.Count; j++)
            {
                HttpPostedFile uploadFile = context.Request.Files[j];
                string avi = uploadFile.FileName;
               
                string c = avi.Substring(avi.LastIndexOf("."));
                if (c!= ".avi")
                {
                    //在这里面写了，可不弹出这句话，但这句话进入了
                    HttpContext.Current.Response.Write("<Script>alert('上传视频格式只能是avi！');</Script>");
                   // return;
                }
                else
                {
                    if (uploadFile.ContentLength > 0)
                    {
                        uploadFile.SaveAs(string.Format("{0}{1}{2}", tempFile, "images/video\\", uploadFile.FileName));
                    }
                }
            }
        }

        HttpContext.Current.Response.Write(" ");
    }

    #endregion
}

[我说我行就是行]

搞定！
完整版上传代码！
前台一样，后台

 protected void Page_Load(object sender, EventArgs e)
    {


        string jscript = "function UploadComplete(){";
        jscript += string.Format("__doPostBack('{0}','');", LinkButton1.ClientID.Replace("_", "$"));

        jscript += "};";
        Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "FileCompleteUpload", jscript, true);
    }
    protected string GetFlashVars()
    {

        return "?" + Server.UrlEncode(Request.QueryString.ToString());
    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {

        string filename = Upload.msgs;
        string format = filename.Substring(filename.LastIndexOf("."));
        if (format != ".flv")
        {
            this.lblMes.Text = "只支持flv格式的视频！";
           // Response.Write("<script>alert('只支持flv格式的视频！');</script>");
        }
        else
        {
            this.lblMes.Text = "上传成功！";
            //Response.Write("<script>alert('上传成功！');</script>");
        }
    }

UpLoad.cs类

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.IO;

public class Upload : IHttpHandler
{
    public Upload()
    {
    }

    #region IHttpHandler Members

    public bool IsReusable
    {
        get { return true; }
    }
    public static string msgs = string.Empty;
    public void ProcessRequest(HttpContext context)
    {
        string c = string.Empty;
        HttpPostedFile uploadFile = null;
        string filename=null;
        string tempFile = null;
        if (context.Request.Files.Count > 0)
        {
            tempFile = context.Request.PhysicalApplicationPath;
            for (int j = 0; j < context.Request.Files.Count; j++)
            {
                uploadFile = context.Request.Files[j];
                filename= uploadFile.FileName;


                c = filename.Substring(filename.LastIndexOf("."));
                
            }
        }
        string str = string.Empty;
        msgs = filename;
        if (c != ".flv")
        {
            return;
        }
        else
        {
            if (uploadFile.ContentLength > 0)
            {
              uploadFile.SaveAs(string.Format("{0}{1}{2}", tempFile, "images/video\\", uploadFile.FileName));
               
            }
        }
        HttpContext.Current.Response.Write(" ");
    }

    #endregion
}

欢迎接分！

[isjoe]

接分。。。。。。。

[老毕]

我可耻地伸手了……

[IT0329]

这个给他一个字段，然后通过字段来接受这个url地址，然后前台输出下不就可以获取到了么？我就这么干的！

[小阳]

接分！

[我说我行就是行]

没人会吗？？我就是想在LinkBtton当中获取上传的文件名！怎么获取？？？