Can I access ext:hidden element from javascript

  1. #1

    Can I access ext:hidden element from javascript

    Hi all,

    How could I access the Ext:Hidden value from javascript? I am trying to show/hide rows according to the rowcount value that is updated during the Page_Load. Ext.getCmp('rowCount') does not help me. or is this a purely my design problem that I have to use Ext components for the table? I try to keep things simple.

    Provided a simplified version of the code as below. Thanks in advance.

    <%@ Page Language="C#" %>
    <%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
    <html xmlns="">
    <head id="Head1" runat="server">
    <script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    // read number of records from db
    // update rowCount, rowCount.Text ="2";
    // populate records    
    <script type="text/javascript">
        function DisplayRow(rowID) {
            var x = &#100;ocument.getElementById(rowID);
   = '';
    <form id="form1" runat="server">
    <ext:ScriptManager ID="ScriptManager1" runat="server"/>
    <ext:Panel ID="QualiPanel" runat="server" Title="Group1" AutoHeight="true">
        <Body >
            <ext:Hidden ID="rowCount" runat="server" Text="1" />    
                <tr id="row1" style="display:none">
                    <ext:TextField ID="txtField1" runat="server" Width="180" />
                    <td >
                    <p> Date:</p>
                    <ext:TextField ID="txtField2" runat="server" Width="60"/>
                <tr id="row2" style="display:none">
                    <td style="width:52%;">
                    <ext:TextField ID="txtField3" runat="server" Width="180" />
                    <td style="width:48%;" >
                    <p>Award Date:</p>
                    <ext:TextField ID="txtField4" runat="server" Width="60"/>
    <script type="text/javascript">
       // Ext.getCmp('rowCount'); does not do the job
       // if row count is 1, it will not show row2.
       //  eg DisplayRow('row1');
  2. #2

    RE: Can I access ext:hidden element from javascript

    it would be:


    hdnFieldNameHere.setValue('Value here');
  3. #3

    RE: Can I access ext:hidden element from javascript

    I'll add...

    *All* Field type controls can be set/get client-side using the .getValue() and .setValue(value) functions.

    Geoffrey McGill
    Founder & CEO
  4. #4

    RE: Can I access ext:hidden element from javascript

    I tried


    at the end of the code.

    but I got JScript runtime error. rowCount is undefined. I missed anything?
  5. #5

    RE: Can I access ext:hidden element from javascript


    Because you execute that code until hidden field is created. Try to wrap it with Ext.onReady(function(){your code})
    Vladimir Shcheglov
    Sr. Developer
  6. #6

    RE: Can I access ext:hidden element from javascript

    Thanks Vladimir for your quick response. It works now. Really appreciate it.

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