Question

In visual studio 2008 when I drag and drop asp controlXXX on aspx page. Property page for this control, does not show event handlers button. It can reappear after switching to designer view but then disappears again. Screenshot attached.

Answer 1

Yes, that’s annoying, but it works probably only in designer.
But you can still add event handlers manually

in html add onclick property and write name of the method

<asp:ImageButton ID="btnAdd" runat="server" onclick="btnAdd_Click" />

and in code-behind add method with two parameters of types: (object, EventArgs) like this:

protected void btnAddTag_Click(object sender, ImageClickEventArgs e)
{
}

or you can also add event handler in Page_Init method

btnAdd.Click+=new ImageClickEventHandler(btnAdd_Click);

(this will also generate automatically the method, only after += press TAB twice)