根据文件类型分别上传到各自的目录中

<P><INPUT type="file" runat="server" size="50" ID="File1" NAME="File1"></P>
<P><INPUT type="file" runat="server" size="50" ID="File2" NAME="File2"></P>
<asp:LinkButton id="LinkButton1" runat="server">上传</asp:LinkButton>  
<A href="javascript:document.forms[0].reset()" id="LinkButton2">重置</A> 
<asp:Label id="Label1" runat="server"></asp:Label>

        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            if(this.IsPostBack) 
                this.UpLoad();

        }

        private System.Boolean UpLoad() 
        {
            System.Web.HttpFileCollection _files = System.Web.HttpContext.Current.Request.Files;            
    
            try 
            {
                for(System.Int32 _iFile = 0; _iFile < _files.Count; _iFile++)
                {
                    //Check to save file to the proper directory    
                    System.Web.HttpPostedFile _postedFile = _files[_iFile]; 
                    System.String _fileName, _fileExtension; 
                    _fileName = System.IO.Path.GetFileName(_postedFile.FileName);        //文件名(包括后缀名)    
                    _fileExtension = System.IO.Path.GetExtension(_fileName);        //扩展名（包括点）

                    if(_fileExtension == ".gif" || _fileExtension == ".GIF" || _fileExtension == ".jpg" || _fileExtension == ".jpg" || _fileExtension == ".bmp" || _fileExtension == ".BMP" ) 
                    {                        
                        _postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("../uploadfiles/images/" + _fileName));
                        
                    }
                    if(_fileExtension == ".swf" || _fileExtension == ".SWF" ) 
                    {                        
                        _postedFile.SaveAs(System.Web.HttpContext.Current.Request.MapPath("../uploadfiles/flash/" + _fileName));
                            
                    }                    

                }
                Label1.Text = "上传成功~";
                return true;

            }
            catch(System.Exception Ex) 
            {
                Label1.Text = Ex.Message;
                return false;  

            }

        }