How to set the default button in content page using asp.net?

Question

I need to set the content page default button. My code is like this:

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent" 
defaultbutton="BtnSearch" defaultfocus="TxtSearchValue">

It is working fine, but my master page menu have one image button like chat, I can press the enter key to fire image button click event but it does not fire default button in content page.

How to handle this type of issue?

Answer 1

1) You simply have to do:

this.Form.DefaultButton = this.btnId.UniqueID;

OR

2) Using Javascript:

function clickButton(e, buttonid)
{

  var evt = e ? e : window.event;

  var bt = document.getElementById(buttonid);

  if (bt)
  {
      if (evt.keyCode == 13)
      {
            bt.click();
            return false;
      }
  }
}

And from the code behind:

ContentPage.Attributes.Add("onkeypress", "javascript:return 
clickButton(event,'" + btnSearch.ClientID + "');");