（＃hdnValue）。val（eventArgs.get_value（））;

}

("#hdnValue").val(eventArgs.get_value()); }

此后，用户按下保存按钮，但是当我调试代码时，我可以检查值是

分配给客户端的隐藏字段，但是当我调试服务器端时，隐藏字段是空的

代码中有什么问题，在asp.net中访问服务器端客户端数据的方法有哪些。请帮助



aspx页

After this,User press save button,but when i debug the code , i can check the value is
assigned to the hidden field in the clientside, but when i debug server side ,the hidden field is empty
what wrong in the code,What are the different way to access client side data in server side in asp.net.Please help

aspx page

<%@ Page Title="" Language="C#" MasterPageFile="~/MasterModule/NewInnerMaster.master"
    AutoEventWireup="true"  CodeFile="LocationMaster.aspx.cs" 
    Inherits="MasterModule_Test" EnableEventValidation="false"  %>

<%@ Register Assembly="IdeaSparx.CoolControls.Web" Namespace="IdeaSparx.CoolControls.Web"
    TagPrefix="asp" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
   

  


     

    <%--validation Combobox--%>
  <%--  <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>--%>

 
    <script type="text/javascript" language="javascript">
        function CheckRecordExistBuilding(id, val) {
            gbl = "";
            if (val.trim() != "") {
                if (gblautocomplete == 0) {
                    PageMethods.CheckBuildingExist(val, onSuccessBuilding, onFailure, id);
                }
            }

        }
        // set the destination textbox value with the ContactName

        function onSuccessBuilding(result, context, methodName) {

            var Buildingid = document.getElementById(context);
            var hndblg = document.getElementById("ContentPlaceHolder1_ContentPlaceHolder1_hndblg");

            var hndBuildingID = document.getElementById("ContentPlaceHolder1_ContentPlaceHolder1_hndBuildingID");
            if (result.split("|")[0] == "1") {
                hndBuildingID.value = result.split("|")[1];
                return true
            }
            else {

                var con = confirm("This Building Doesn't Exist in the Master. Do You Want To Add a New One ?");

                if (con == true) {

                    PageMethods.InsertBuilding(Buildingid.value, onSuccededBuilding, onFailure);

                }
                else {
                    Buildingid.value = hndblg.value;
                    return false
                }
            }
        }

        function onSuccededBuilding(result) {
            // debugger
            var hndBuildingID = document.getElementById("ContentPlaceHolder1_ContentPlaceHolder1_hndBuildingID");
            // hndBuildingID.value = result;
            hndBuildingID.value = '008888'
        }

        function onFailure(error) {

        }


    </script>


     <script language="JavaScript">
         function OnItemSelectedBuilding(source, eventArgs) {

             //  debugger
             var results = eval('(' + eventArgs.get_value() + ')');
             //

get（'ContentPlaceHolder1_ContentPlaceHolder1_hndBuildingID'）。innerText = parseInt（results）;

var hndBuildingID = document.getElementById（ContentPlaceHolder1_ContentPlaceHolder1_hndBuildingID）;

// hndBuildingID.value = results

hndBuildingID.value =555555
}

<％ - 正在加载弹出 - ％GT;
< / script>






< asp：UpdatePanel ID =UpdatePanel3runat =server>
< ContentTemplate>

< div id =Div1runat =server

style =top：300px; left：600px; display：none; position：absolute;&gt ;
< img id =img1alt =src =waiting.gifstyle =display：inline; height：16px; /&GT;
< / div>



< div>

< div style =padding-removed 0px; padding-removed 10px; width：1024px;>
< asp：HiddenField ID =HiddenField1runat =server/>
< asp：UpdatePanel ID =UpdatePanel4runat =server>
< ContentTemplate>
< div style =height：329px; ID = Div2的 &GT;
< asp：CoolGridView ID =CoolGridView1runat =serverAutoGenerateColumns =FalseOnRowDataBound =GridView1_RowDataBound
OnRowCommand =GridView1_RowCommandShowFooter =falseOnRowCancelingEdit =GridView1_RowCancelingEdit
OnRowEditing =GridView1_RowEditingToolTip =点击此处进行编辑
OnPageIndexChanging =GridView1_PageIndexChangingStyle =table-layout：fixed;
Width =100％Height =100％CssClass =mGridDataKeyNames =LocationIDPagerStyle-CssClass =pgr
AlternatingRowStyle-CssClass =alt>
< AlternatingRowStyle CssClass =alt/>
< Columns>

< asp：BoundField HeaderText =BuildingDataField =Bldg_NameHeaderStyle-Width =130pxHeaderStyle-Horizo​​ntalAlign =Left/>

< asp：TemplateField HeaderText =Sub LocationHeaderStyle-Width =140pxHeaderStyle-Horizo​​ntalAlign =Left>
< ItemTemplate>

< asp：HiddenField ID =hndbuildingrunat =serverValue ='<％＃Bind（bldgID）％>' /&GT;

< / ItemTemplate>
< / asp：TemplateField>

< / Columns>
< PagerStyle Font-Names =CalibriFont-Size =12pxWidth =1024pxBackColor =＃000000
Horizo​​ntalAlign =CenterForeColor =White/>
< / asp：CoolGridView>

< asp：Button ID =Button1runat =serverOnClick =GridView1_OnClickstyle =display：none; /&GT;
< / div>
< / ContentTemplate>
< / asp：UpdatePanel>
< / div>


< / div>
< div>
< div ID =Div3runat =serverBackColor =WhiteStyle =display：inline; background-color：rgba（0,0,0,0.5）; width：100％; height ：100％;顶部：0;左：0;右：0;底部：0;位置：固定;>

< div>
< div style =padding：20px;删除30％;删除38％;删除：固定;背景颜色：白色;不透明度：1;框阴影：10px 10px 10px＃5d5d5d;>



< table style =border：Solid 0px grey; background-color：#EAEAEA; width：400px; height：350px;
cellpadding =0cellspacing =0border =0>


< tr>
< td nowrap =nowrap
style =width：100px; text-align：left; padding-removed 15px; padding-removed 5px;
class =normaltd>

建立
< / td>
< td nowrap =nowrapstyle =width：300px; text-align：left; VALIGN = 顶部 &GT;




< asp：TextBox ID =TextBox7runat =server

style =width：276px;高度：19px; onkeypress事件= 测试（）; &GT;&LT; / ASP：文本框&GT;
< asp：RequiredFieldValidator ID =RequiredFieldValidator10ControlToValidate =ddlBuildingValidationGroup =S
runat =serverErrorMessage =>< / asp：RequiredFieldValidator>



< div id =div8onmouseover =setGblflag（）önmouseout=removeGblFlg（）>< / div>
< asp：AutoCompleteExtender ID =AutoCompleteExtender11runat =server
DelimiterCharacters =Enabled =TrueServiceMethod =GetBuilding
TargetControlID =ddlbuildingMinimumPrefixLength =1 FirstRowSelected =false
CompletionInterval =500onclientitemselected =OnItemSelectedBuilding
CompletionListCssClass =completionList
CompletionSetCount =20EnableCaching =true
CompletionListHighlightedItemCssClass = itemHighlighted
CompletionListItemCssClass =listItemCompletionListElementID =divbuilding>
< / asp：AutoCompleteExtender>
< asp：FilteredTextBoxExtender ID =FilteredTextBoxExtender11
runat =server
TargetControlID =ddlBuilding
FilterMode =InvalidChars
InvalidChars =+。 * / ~` _ = {[}] | \？><，>）（！@＃

get('ContentPlaceHolder1_ContentPlaceHolder1_hndBuildingID').innerText = parseInt(results); var hndBuildingID = document.getElementById("ContentPlaceHolder1_ContentPlaceHolder1_hndBuildingID"); // hndBuildingID.value = results hndBuildingID.value = "555555" } <%--Loading For popup--%> </script> <asp:UpdatePanel ID="UpdatePanel3" runat="server"> <ContentTemplate> <div id="Div1" runat="server" style="top: 300px; left: 600px; display:none; position:absolute;"> <img id="img1" alt="" src="waiting.gif" style="display: inline; height: 16px;" /> </div> <div > <div style="padding-removed 0px; padding-removed 10px; width: 1024px;"> <asp:HiddenField ID="HiddenField1" runat="server" /> <asp:UpdatePanel ID="UpdatePanel4" runat="server"> <ContentTemplate> <div style=" height:329px;" id="Div2"> <asp:CoolGridView ID="CoolGridView1" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound" OnRowCommand="GridView1_RowCommand" ShowFooter="false" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowEditing="GridView1_RowEditing" ToolTip="Click Here To Edit" OnPageIndexChanging="GridView1_PageIndexChanging" Style="table-layout: fixed;" Width="100%" Height="100%" CssClass="mGrid" DataKeyNames="LocationID" PagerStyle-CssClass="pgr" AlternatingRowStyle-CssClass="alt" > <AlternatingRowStyle CssClass="alt" /> <Columns> <asp:BoundField HeaderText="Building" DataField="Bldg_Name" HeaderStyle-Width="130px" HeaderStyle-HorizontalAlign="Left" /> <asp:TemplateField HeaderText="Sub Location" HeaderStyle-Width="140px" HeaderStyle-HorizontalAlign="Left"> <ItemTemplate> <asp:HiddenField ID="hndbuilding" runat="server" Value='<%# Bind("bldgID") %>' /> </ItemTemplate> </asp:TemplateField> </Columns> <PagerStyle Font-Names="Calibri" Font-Size="12px" Width="1024px" BackColor="#000000" HorizontalAlign="Center" ForeColor="White" /> </asp:CoolGridView> <asp:Button ID="Button1" runat="server" OnClick="GridView1_OnClick" style="display:none;" /> </div> </ContentTemplate> </asp:UpdatePanel> </div> </div> <div > <div ID="Div3" runat="server" BackColor="White" Style="display:inline; background-color :rgba(0,0,0,0.5); width:100%;height:100%; top:0; left:0; right:0;bottom:0;position:fixed;"> <div> <div style="padding:20px; removed 30%; removed 38%; removed:fixed; background-color: white; opacity:1; box-shadow: 10px 10px 10px #5d5d5d;"> <table style="border: Solid 0px gray; background-color: #EAEAEA; width: 400px; height: 350px;" cellpadding="0" cellspacing="0" border="0"> <tr> <td nowrap="nowrap" style="width: 100px; text-align: left; padding-removed 15px; padding-removed 5px;" class="normaltd"> Building </td> <td nowrap="nowrap" style="width: 300px; text-align: left;" valign="top"> <asp:TextBox ID="TextBox7" runat="server" style="width:276px; height:19px;" onkeypress="test();"></asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator10" ControlToValidate="ddlBuilding" ValidationGroup="S" runat="server" ErrorMessage=""></asp:RequiredFieldValidator> <div id="div8" onmouseover="setGblflag()" önmouseout="removeGblFlg()" ></div> <asp:AutoCompleteExtender ID="AutoCompleteExtender11" runat="server" DelimiterCharacters="" Enabled="True" ServiceMethod="GetBuilding" TargetControlID="ddlbuilding" MinimumPrefixLength="1" FirstRowSelected="false" CompletionInterval="500" onclientitemselected="OnItemSelectedBuilding" CompletionListCssClass = "completionList" CompletionSetCount="20" EnableCaching="true" CompletionListHighlightedItemCssClass="itemHighlighted" CompletionListItemCssClass="listItem" CompletionListElementID="divbuilding"> </asp:AutoCompleteExtender> <asp:FilteredTextBoxExtender ID="FilteredTextBoxExtender11" runat="server" TargetControlID="ddlBuilding" FilterMode="InvalidChars" InvalidChars="+.*/~`_={[}]|\?><,>)(!@#

％^&：;'>
< / asp：FilteredTextBoxExtender>

< / td>
< / tr>


< tr>
< td nowrap =nowrapcolspan =2style =width：400px; padding-removed5px; padding-removed5px;>
< table style =width：400px; height：40px; background -color：#EAEAEA;border =0 &GT;
< tr>
< td style =text-align：left; width：198px; padding-removed 3px; padding-removed 18px;>
< asp：Button ID =Button4runat =serverstyle =display：none/>
<asp:Button ID=\"Button5\" runat=\"server\" Text=\"Cancel\" OnClientClick=\"closePopUp(); return false;\"
Width=\"120px\" Height=\"35px\" ToolTip=\"Don't Save & Exit\"
CssClass=\"areapopupbtncancel\" BorderColor=\"#FF9900\" ValidationGroup=\"lS\" />


</td>
<td style=\"width: 300px; height: 50px; text-align: right; padding-removed 22px;\">
<asp:Button ID=\"Button6\" CommandName=\"Update\" Height=\"35px\" Width=\"150px\" runat=\"server\"
Text=\"Done\" OnClick=\"btnUpdate_Click\" CssClass=\"areapopupbtndone\"
BorderColor=\"#ED7D31\" ValidationGroup=\"S\" ToolTip=\"Save Data\" />
<asp:Button ID=\"Button7\" CommandName=\"New\" Height=\"35px\" Width=\"150px\" runat=\"server\"
Text=\"Done\" OnClick=\"btnNew_Click\" CssClass=\"areapopupbtndone\"
BorderColor=\"#ED7D31\" ValidationGroup=\"S\" ToolTip=\"Save Data\" />
</td>
</tr>
</table>
</td>
</tr>
</table>
< / div>
< / div>
< / div>
< / div>



<div align=\"center\"
style=\" display:none; padding:20px; removed 39%; removed 48%; removed:fixed; z-index: 105;\" id=\"Div10\" class=\"modalPopup\" >
<img alt=\"loading..\" src=\"waiting.gif\" /><div>
< / div>
</div>
<div align=\"center\"
style=\" display:none; padding:20px; removed 64%; removed 57%; removed:fixed; z-index: 105;\" id=\"Div11\" >
<img alt=\"loading..\" src=\"button.gif\" />



<div>
< / div>
</div>



</ContentTemplate>
< / asp：UpdatePanel>

</asp:Content>

%^&:;'" > </asp:FilteredTextBoxExtender> </td> </tr> <tr> <td nowrap="nowrap" colspan="2" style="width: 400px; padding-removed5px;padding-removed5px;"> <table style="width: 400px; height: 40px; background-color: #EAEAEA;" border="0"> <tr> <td style="text-align: left; width: 198px; padding-removed 3px; padding-removed 18px;"> <asp:Button ID="Button4" runat="server" style="display:none"/> <asp:Button ID="Button5" runat="server" Text="Cancel" OnClientClick="closePopUp(); return false;" Width="120px" Height="35px" ToolTip="Don't Save & Exit" CssClass="areapopupbtncancel" BorderColor="#FF9900" ValidationGroup="lS" /> </td> <td style="width: 300px; height: 50px; text-align: right; padding-removed 22px;"> <asp:Button ID="Button6" CommandName="Update" Height="35px" Width="150px" runat="server" Text="Done" OnClick="btnUpdate_Click" CssClass="areapopupbtndone" BorderColor="#ED7D31" ValidationGroup="S" ToolTip="Save Data" /> <asp:Button ID="Button7" CommandName="New" Height="35px" Width="150px" runat="server" Text="Done" OnClick="btnNew_Click" CssClass="areapopupbtndone" BorderColor="#ED7D31" ValidationGroup="S" ToolTip="Save Data" /> </td> </tr> </table> </td> </tr> </table> </div> </div> </div> </div> <div align="center" style=" display:none; padding:20px; removed 39%; removed 48%; removed:fixed; z-index: 105;" id="Div10" class="modalPopup" > <img alt="loading.." src="waiting.gif" /><div> </div> </div> <div align="center" style=" display:none; padding:20px; removed 64%; removed 57%; removed:fixed; z-index: 105;" id="Div11" > <img alt="loading.." src="button.gif" /> <div> </div> </div> </ContentTemplate> </asp:UpdatePanel> </asp:Content>

protected void Page_Load(object sender, EventArgs e)
   {

       if (pnlpopup.Visible == false)
       {
           pnlpopup.Visible = false;
       }
       else
       {
           pnlpopup.Visible = true;
       }

       ScriptManager.RegisterStartupScript(this, this.GetType(), "starScript", "HideScroll();", true);


       ddlCompany.Attributes.Add("onBlur", "CheckRecordExist(this.id,this.value);");
       ddlCity.Attributes.Add("onBlur", "CheckRecordExistCity(this.id,this.value);");
       ddlarea.Attributes.Add("onBlur", "CheckRecordExistArea(this.id,this.value);");
       ddlBuilding.Attributes.Add("onBlur", "CheckRecordExistBuilding(this.id,this.value);");
       ddlfloor.Attributes.Add("onBlur", "CheckRecordExistFloor(this.id,this.value);");
       ddlsubcategory.Attributes.Add("onBlur", "CheckRecordExistSubLocation(this.id,this.value);");

       if (!IsPostBack)
       {
           GetData();
           pnlpopup.Visible = false;

       }


   }

protected void btnUpdate_Click(object sender, EventArgs e)
   {

       LocationDTO objdto = new LocationDTO();
       //Update the record here
       UpdateLocation();
       // this.ModalPopupExtender1.Hide();
       pnlpopup.Visible = false;
       GetData();
   }
   public void UpdateLocation()
   {
       try
       {

           LocationBLL objbll = new LocationBLL();
           LocationDTO objdto = new LocationDTO();


           objdto.LocationID = HFLDlocationID.Value;
           objdto.LocationHeading = txtLocationHeading.Text;

           objdto.CompanyID = hndCompanyID.Value.ToString() == "" ? ddlCompany.Text : hndCompanyID.Value;



           objdto.CityID = hndCityID.Value.ToString() == "" ? ddlCity.Text : hndCityID.Value;

           objdto.Areaid = hndAreaID.Value.ToString() == "" ? ddlarea.Text : hndAreaID.Value;

           objdto.BldgID = hndBuildingID.Value.ToString() == "" ? ddlBuilding.Text : hndBuildingID.Value.Replace(" ", "");

           //if (ddlfloor.Text == "")
           //{
           //    hndFloorID.Value = "";

           //}
           //objdto.FloorID = hndFloorID.Value.ToString() == "" ? ddlfloor.Text : hndSubLocationID.Value.Replace(" ", "");

           if (ddlfloor.Text == "")
           {
               hndFloorID.Value = "";

           }
           objdto.FloorID = hndFloorID.Value.ToString() == "" ? ddlfloor.Text : hndFloorID.Value.Replace(" ", "");




           if (ddlsubcategory.Text == "")
           {
               hndSubLocationID.Value = "";

           }
           objdto.SubLocationID = hndSubLocationID.Value.ToString() == "" ? ddlsubcategory.Text : hndSubLocationID.Value.Replace(" ", "");


           int objupdto = objbll.updateLocationMaster(objdto);
           clearAllField();

       }
       catch (Exception ex)
       {
           throw ex;
       }



   }

 protected void GridView1_OnClick(object sender, EventArgs e)
   {

       btnNew.Visible = false;
       btnUpdate.Visible = true;
       Button buttonSender = sender as Button;
       int index;
       GridViewRow row = null;
       if (int.TryParse(Request.Params.Get("__EVENTARGUMENT"), out index))
       {
           row = GridView1.Rows[index];
           Label area = (Label)GridView1.Rows[index].FindControl("lblarea");



           ddlBuilding.Text = row.Cells[6].Text.Replace(" ", "");


           HiddenField hndbuilding = (HiddenField)GridView1.Rows[index].FindControl("hndbuilding");
           hndbuilding.Value.ToString();


           hndblg.Value = row.Cells[6].Text;


           pnlpopup.Visible = true;

       }






   }