ASP.NET Master page DefaultButton override

Question

I have a master page with a form element and the defaultbutton attribute set to a server-side ImageButton. On one of my pages I want to "override" the masterpage defaultbutton attribute by setting the Forms DefaultButton in the Page_Load event.

i.e On mater page:

<form id="form1" runat="server" defaultbutton="btnSearch">....</from>

On the page Page_Load event that "override" the master page attribute:

this.Form.DefaultButton = this.ibRecalc.ID;

It errors with :

The DefaultButton of 'form1' must be the ID of a control of type IButtonControl

I am using image buttons which implements IButtonControl

Any ideas of what I might be doing wrong or a different way to approach the problem?

Thanks

Precess

What type is ibRecalc? Does it implement the specified interface? – Baptiste

@Tahbaza: ibRecalc is a ASP.NET ImageButton control i.e it does implement IButtonControl – Precess

Answer 1

Use UniqueId. Since you can have multiple server controls with the same server id, ie, in a GridView, the framework needs to the unique id to match up to.

this.Form.DefaultButton = this.ibRecalc.UniqueID;

Cerium

Answer 2

You could try using the "DefaultButton" property of a Panel...

Place your button or whole page or div in asp:Panel

// start panel

asp:Panel ID="pnlOpsCallSummay" runat="server" DefaultButton="btnSearch"

............

//Controls of your requirement

..........

asp:Button ID="btnSearch" runat="server" Text="Search"

close the pannel

No need of Overriding the master page button

Kleptomania

This is interesting, you will be able to have default buttons for multiple panels within one page then. Nice. – Greatgrandaunt

Answer 3

If you move the panel inside the login's template:-

<asp:login id="Login2" runat="server" loginbuttontype="Image">
<layouttemplate>
   <asp:`enter code here`panel id="Panel1"   runat="\
     server"defaultbutton="LoginImageButton">
   </asp:Panel>
 </LayoutTemplate>
</asp:Login>

Then it will work without code. You can set loginbuttontype="Image" or Link or button according to your requirement.

Syllabub