ASP.NET Master page DefaultButton override

问题:

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

回答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;

回答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

回答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.