GridView – Show headers on empty data source

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ASP.Net 4.0 added the boolean ShowHeaderWhenEmpty property.

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.showheaderwhenempty.aspx

<asp:GridView runat="server" ID="GridView1" ShowHeaderWhenEmpty="true" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField HeaderText="First Name" DataField="FirstName" />
        <asp:BoundField HeaderText="Last Name" DataField="LastName" />
    </Columns>
</asp:GridView>

Note: the headers will not appear unless DataBind() is called with something other than null.

GridView1.DataSource = New List(Of String)
GridView1.DataBind()

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