title: Finding a control on Dropdownlist SelectedIndexChanged in Repeater
body: <p>I have a repeater control which has a <code>DropDownlist</code> and a <code>TextBox</code>.</p>
  
  <p>On <code>selectedIndexChanged</code> event of the dropdown, I need to enable or disable the textbox based on the dropdown selected value.</p>
  
  <p>I am able to trigger the <code>SelectedIndexChanged</code> event but not able to find the <code>TextBox</code> control inside this event. </p>
  
  <p>Below is my SelectedIndexChanged event handler in codebehind.</p>
  
  <pre><code>    protected void ddl_userType_SelectedIndex(object sender, EventArgs e)
      {
          var ddl = (DropDownList)sender;           
      }
  </code></pre>
  
  <p>Could someone please help me achieve what I need.</p>