ASP.NET Master page DefaultButton override

c# asp.net imagebutton defaultbutton
Dieter G picture Dieter G · Sep 1, 2010 · Viewed 13.6k times · Source

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

Answer

Rebecca Chernoff picture Rebecca Chernoff · Sep 1, 2010

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;

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