title: Hidden/Visible display depending on C# Dropdown selection
body: <p>To be brief, I need the Textbox with ID="textComments" to only appear when the dropdown option of 'Other' is selected from the dropdown, and then disappear if another selection is made. I could do this with JS but it needs to be in C#.</p>
  
  <pre><code>&lt;asp:DropDownList runat="server" ID="dropEnquiryType" CssClass="dropdownRequestList"&gt;
      &lt;asp:ListItem Value="Customer Services" Text="Customer Services"&gt;&lt;/asp:ListItem&gt;
      &lt;asp:ListItem Value="Website" Text="Website"&gt;&lt;/asp:ListItem&gt;
      &lt;asp:ListItem Value="Contract" Text="Contract Hire"&gt;&lt;/asp:ListItem&gt;
      &lt;asp:ListItem Value="Other" Text="Other"&gt;&lt;/asp:ListItem&gt;
  &lt;/asp:DropDownList&gt;
  
  &lt;asp:label runat="server" ID="lblComments" AssociatedControlID="textComments" CssClass="textLabel"&gt;Comments:&lt;/asp:label&gt;
  &lt;asp:TextBox runat="server" MaxLength="200" TextMode="MultiLine" Columns="40" Rows="4" ID="textComments" Wrap="true" CssClass="textComments"&gt;&lt;/asp:TextBox&gt;
  </code></pre>
  
  <p>And help would be greatly appreciated. </p>