Question

194

ASP .net get hidden value from code behind in page_load function

rated 0 times [ 199] [ 5] / answers: 1 / hits: 8990 / 11 Years ago, thu, february 13, 2014, 12:00:00

I have a hidden field that I set in my javascript code:

   <script type=text/javascript>



    function start() {            

        document.getElementById('Hidden1').value = somme value;

     }

   </script>



 <body>



 <form id=form1 runat=server>

   <div>

      <input type=text id=Hidden1 name=Hidden1 runat=server/>

  <div>    

 </form>

In my code behind I want to get the input value in my page_load function:

  protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.ClientScript.IsClientScriptBlockRegistered(start) && !IsPostBack)

        {



            Page.ClientScript.RegisterStartupScript(typeof(Page), start, start();, true);



        }

        string message =Hidden1.Value;

    }

The message is empty, how can'I get the hidden value in my page_load?

Thanks.

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kendellc

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2 Years ago

answered 11 Years ago monetm · Accepted Answer

You are not submitting the page back to the server, you won't be able to get page variables unless you are doing a POST.

change this:

<form id=form1 runat=server>

 <div>

   <input type=text id=Hidden1 name=Hidden1 runat=server/>

 <div>    

</form>

to this: (EDIT: changed the type=hidden too)

<form id=form1 runat=server>

 <div>

   <input type=hidden id=Hidden1 name=Hidden1 runat=server/>

 <div>    

 <input type=submit value=submit />

</form>

Then click the submit button