Access HiddenField when using Update Panel RSS

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  y_great2002

  Member

  1 Points

  7 Posts

  Access HiddenField when using Update Panel

  Jun 06, 2007 10:42 PM|LINK

  Hello,

  I have a page that using update panel. I register hiddenfield using ScriptManager.Registerhiddenfield. I want to get the value, but it always failed.

  This is the code :

       protected void Page_Load(object sender, EventArgs e)
      {
              Label1.Text = this.Request.Form["__vsKey"];
      }
  
      protected void Button1_Click(object sender, EventArgs e)
      {
          ScriptManager.RegisterHiddenField(this, "__vsKey", "myValue");
      }

   

  When I don't use update panel, it's working properly. Do anyone know how to access the value? 

  Thanks before
  

  RegisterHiddenField

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  chetan.sarode

  All-Star

  53389 Points

  9034 Posts

  Re: Access HiddenField when using Update Panel

  Jun 07, 2007 04:38 AM|LINK

  What kind of error you are getting ?

  To register a hidden field for a control that is inside an UpdatePanel control so that the field is registered only when the panel is updated, use the RegisterHiddenField(Control, String, String) overload of this method. If you are registering a hidden field that does not pertain to partial-page updates and you want to register a hidden field only one time during initial page rendering, use the RegisterHiddenField(String, String) method of the ClientScriptManager class.

  Chetan Sarode
  Senior Software Engineer,
  Approva Systems Pvt Ltd, Pune, India.
  
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  y_great2002

  Member

  1 Points

  7 Posts

  Re: Access HiddenField when using Update Panel

  Jun 07, 2007 08:53 AM|LINK

  The problem is I don't get the value from this hiddenfield when using UpdatePanel. It always return null value.

  I'm using a button to register the hiddenfield

      protected void Button1_Click(object sender, EventArgs e)
      {
          ScriptManager.RegisterHiddenField(this, "__vsKey", "myValue");
      }

   

  And when the page load, a label display the hiddenfield value

      protected void Page_Load(object sender, EventArgs e)
      {
              Label1.Text = this.Request.Form["__vsKey"];
       }

   

  But, the label display nothing when I use UpdatePanel.