I want a person to click on purchase, which triggers code in the code-behind开发者_高级运维.

This works fine with a Button, but I would prefer a text hyperlink?

    <asp:Button runat="server" ID="purchase" Text="Purchase" />

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How about a LinkButton? A LinkButton basically gives you an asp:Button styled as a hyperlink.

<asp:LinkButton runat="server" ID="purchase" Text="Purchase" />

See MSDN for more information.

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Use a LinkButton instead of a Hyperlink control. It looks like a text hyperlink, but acts like a button.

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LinkButton

Markup:

<asp:LinkButton runat="server" Text="Purchase" ID="purchase"  />

In your code-behind

Private Sub purchase_ServerClick(sender As Object, e As System.EventArgs) Handles purchase.Click            
  'process order
End Sub

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HtmlAnchor

Markup:

<a runat="server" id="purchase">Purchase</a>

In your code-behind

 Private Sub purchase_ServerClick(sender As Object, e As System.EventArgs) Handles purchase.ServerClick
        'process order
 End Sub

HtmlAnchor ServerClick Event