ASP.NET2.0中创建模态对话框提交按钮不起作用，什么原因？

 

using  System; using  System.Data; using  System.Configuration; using  System.Collections; using  System.Web; using  System.Data.SqlClient; using  System.Web.Security; using  System.Web.UI; using  System.Web.UI.WebControls; using  System.Web.UI.WebControls.WebParts; using  System.Web.UI.HtmlControls; public   partial   class  Admin_Links_AddEditLinks : System.Web.UI.Page ... {    DBUtility.TSqlDB Db = new DBUtility.TSqlDB();    JSModel.TJavaScript JS = new JSModel.TJavaScript();    FileModel.UpLoadFile upFile = new FileModel.UpLoadFile();    protected void Page_Load(object sender, EventArgs e)    ...{        Response.Expires = 0;        Response.Cache.SetNoStore();        Response.AppendHeader("Pragma", "no-cache");        new CheckUser();        if (Request["LId"] != null)        ...{            SqlDataReader Dr = Db.ExecuteReader(Db.myCon, CommandType.Text, "select * from tb_HyperLink where dc_Id="+Request["LId"], null);            if (Dr.Read())            ...{                txtLinkName.Text = Dr["vc_LinkName"].ToString();                txtLinkUrl.Text = Dr["vc_LinkUrl"].ToString();                HWhere.Value = Dr["vc_LogoUrl"].ToString();            }            Dr.Close();        }    }    protected void btnAdd_Click(object sender, EventArgs e)    ...{        if (FileUpload1.HasFile && FileUpload1.PostedFile.ContentLength > 2)        ...{            string[] arr =...{ ".jpg", ".gif" };            HWhere.Value = upFile.UploadFile(FileUpload1, "/Uploads/Link/", 1024, arr, HWhere.Value == "", HWhere.Value);            if (HWhere.Value == "")            ...{                return;            }        }        SqlParameter[] prams = new SqlParameter[]...{            new SqlParameter("@dc_Id",SqlDbType.Decimal),            new SqlParameter("@vc_LinkName",SqlDbType.VarChar,50),            new SqlParameter("@vc_LinkUrl",SqlDbType.VarChar,200),            new SqlParameter("@vc_LogoUrl",SqlDbType.VarChar,200),            new SqlParameter("@i_Mid",SqlDbType.Int),            new SqlParameter("@AdminId",SqlDbType.VarChar,200),            new SqlParameter("@i_Ret",SqlDbType.Int)        };        prams[0].Value = Request["LId"] == null ? "0" : Request["LId"];        prams[1].Value = txtLinkName.Text;        prams[2].Value = txtLinkUrl.Text;        prams[3].Value = HWhere.Value;        prams[4].Value = Request["Mid"];        prams[5].Value = Request.Cookies["AdminId"].Value;        prams[6].Direction = ParameterDirection.Output;        Db.ExecuteNonQuery(Db.myCon, CommandType.StoredProcedure, "Pap_HyperLink", prams);        if (prams[6].Value.ToString() == "1")        ...{            if (Request["LId"] == null)            ...{                JS.MsgBox("提示：链接信息添加成功！");            }            else            ...{                JS.MsgBox("提示：链接信息编辑成功！");            }            JS.ReloadWindow();        }        JS.Redirect(Request.RawUrl);    }} <% ... @ Page Language="C#" AutoEventWireup="true" CodeFile="AddEditLinks.aspx.cs" Theme="StyleThemes"    Inherits="Admin_Links_AddEditLinks"  %> <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > < html  xmlns ="http://www.w3.org/1999/xhtml" > < head  runat ="server" >      < title > 编辑友情链接信息 </ title >      < meta  http-equiv ="Expires"  content ="0"   />          < link  href ="../Style/Style.css"  rel ="stylesheet"  type ="text/css"   />      < script  language ="javascript"  src ="../../JSBlock/UseCheck.js"  type ="text/javascript" ></ script >      < script  language ="javascript"  type ="text/javascript" > ...         function Check()        ...{            if(document.form1.txtLinkName.value=="")            ...{                alert("提示：请输入网站名称！");                document.form1.txtLinkName.focus();                return false;            }            if(document.form1.txtLinkUrl.value=="")            ...{                alert("提示：请输入网站链接地址！");                document.form1.txtLinkUrl.focus();                return false;            }            if(TestReg(document.form1.txtLinkUrl.value)==false)            ...{                alert("提示：请输入合法的链接地址！");                document.form1.txtLinkUrl.select();                return false;            }        }     </ script > </ head > < body >      < form  id ="form1"  method ="post"  runat ="server" >          < div  class ="divA" >              < table  border ="0"  cellpadding ="0"  cellspacing ="8"  width ="100%" >                  < tr >                      < td >                         网站名称： < asp:TextBox  ID ="txtLinkName"  runat ="server"  Width ="173px" ></ asp:TextBox >                      </ td >                  </ tr >                  < tr >                      < td >                         链接地址： < asp:TextBox  ID ="txtLinkUrl"  runat ="server"  Width ="237px" ></ asp:TextBox >                      </ td >                  </ tr >                  < tr >                      < td >                         图片地址： < asp:FileUpload  ID ="FileUpload1"  CssClass ="btnA"  runat ="server"   />                      </ td >                  </ tr >                  < tr >                      < td  align ="center"  style ="height: 50px;" >                          < asp:Button  ID ="btnAdd"  OnClientClick ="return Check();"  runat ="server"  Text ="确定"                             OnClick ="btnAdd_Click"   />                                                                 < input  id ="Reset1"  class ="btnA"  type ="reset"  value ="重置"   />                                                                 < input  type ="button"  class ="btnA"  value ="关闭"  onclick ="javascript:window.close();"   />                      </ td >                  </ tr >              </ table >              < input  type ="hidden"  id ="HWhere"  name ="HWhere"  runat ="server"   />          </ div >      </ form > </ body > </ html >

ASP.NET2.0中创建模态对话框（showModalDialog）用来向数据库中添加信息，点击提交按钮怎么不起作用？反而把这个网页在浏览器中显示出来添加信息即可成功！请高手指点我该怎么设计？