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Set hidden value from JS codebhind not working?

  1. #1
    Nov 18, 2009, 11:24 PM

    Set hidden value from JS codebhind not working?

    I am trying to set a hidden value from code behind JS... Using it as I am trying to get the a value fron a control in an iFrame parent - when I run the below - everything fires but the hdnProCheck in the last lines value is not showing?

    


this.ScriptManager1.AddScript("alert(parent.rb1.checked);if (parent.rb1.checked){hdnProCheck.setValue('1')};alert(hdnProCheck.getValue());");


int result;


result = String.Compare(hdnProCheck.Value.ToString(), "1");


this.ScriptManager1.AddScript("alert('" + hdnProCheck.Value.ToString() + "');");
  2. #2
    Nov 19, 2009, 3:28 AM

    RE: Set hidden value from JS codebhind not working?

    Hi Tbaseflug,

    Your code appears fine at first glance.


    Can you post a simplified .aspx sample demonstrating the full scenario.


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  3. #3
    Nov 19, 2009, 12:10 PM

    RE: Set hidden value from JS codebhind not working?

    Sure - it is just really strange - I kept it simple here and still when I try the second alert from the code-behind... nothing

    here is the aspx:
    


<body>


<form id="form1" runat="server">


<ext:ScriptManager ID="ScriptManager1" runat="server">


</ext:ScriptManager>





<ext:Hidden runat="server" ID="hdnProCheck" />






</form>


</body>
    and here is the simple code-behind
    



protected void Page_Load(object sender, EventArgs e)


{


this.ScriptManager1.AddScript(hdnProCheck.ClientID + ".setValue('1');alert(" + hdnProCheck.ClientID + ".getValue());");


this.ScriptManager1.AddScript("alert('" + hdnProCheck.Value + "');");


}
  4. #4
    Nov 19, 2009, 12:23 PM

    RE: Set hidden value from JS codebhind not working?

    so - in summary - this works:



    this.ScriptManager1.AddScript("alert(" + hdnProCheck.ClientID + ".getValue());");

    But this does not?
    this.ScriptManager1.AddScript("alert('" + hdnProCheck.Value + "');");

    So - when I try and check the hidden value from my code behind -it is coming up blank/null
  5. #5
    Nov 19, 2009, 12:25 PM

    RE: Set hidden value from JS codebhind not working?

    Hi,

    What you expect with second alert if Value of hidden field is empty?
    You build script until it's execution.


    Here is a list registered script
    hdnProCheck.setValue('1');alert(hdnProCheck.getValue());

    alert('')

    setValue('1') executted on client side after any script building on server side (on server side hdnProCheck.Value is empty)
  6. #6
    Nov 19, 2009, 12:31 PM

    RE: Set hidden value from JS codebhind not working?

    So - I am an idiot - is there a way to set the hidden value from server side - in the JS? Reason I was trying trying to do here is - I have a tab panel - from tab1 - I am trying to check the value of a radio button - and set the hidden field on tab1 iframe to that value - so am checking it with "parent.rb1.checked' - not sure if I can do that in the code behind...
  7. #7
    Nov 19, 2009, 12:54 PM

    RE: Set hidden value from JS codebhind not working?

    For now - went the querystring route - thanks

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