title: Bind the visibility of a TemplateField to the content of a BoundField
body: <p>The (pseudo code) expression within the "Visible"-Tag of the TemplateField is what I like to achieve, any ideas?
  I´d really love to do it declaratively. No OnRowCreated event handling, Cells[x], ...</p>
  
  <pre><code>            &lt;asp:GridView ID="GridViewTest" runat="server" AutoGenerateColumns="false"&gt;
                  &lt;Columns&gt;
                      &lt;asp:BoundField DataField="MyProperty" HeaderText="My Property" /&gt;
                      &lt;asp:TemplateField Visible="&lt;%# MyProperty == 'VisibleString' %&gt;"&gt;
                          &lt;ItemTemplate&gt;
                              &lt;asp:ImageButton ID="ImageButton1" runat="server" AlternateText="" ImageUrl="" OnClick="ImageButton1_Click" /&gt;
                          &lt;/ItemTemplate&gt;
                      &lt;/asp:TemplateField&gt;
                  &lt;/Columns&gt;
              &lt;/asp:GridView&gt;
  </code></pre>