title: How to limit the visible items of dropdownlist, which is populated by DataSet
body: <p>I have a <code>DropdownList ASP control</code>, which is populating by <code>DataSet</code>.</p>
  
  <p>I am using <code>.net 3.5, c#.</code></p>
  
  <p>To control the height of DropDownList, i am using the following code and it is working.</p>
  
  <pre><code>&lt;asp:DropDownList size="1"
              onMouseOver="this.size=10;"             
              onMouseOut="this.size=1;"
              style="display:none; position:absolute; width:150px;" 
              runat="server"&gt;&lt;/asp:DropDownList&gt;
  </code></pre>
  
  <p><strong>But it is flickering</strong> when clicking on it, means first it shows all values and again resized for 10, provided length of the control.</p>
  
  <p>Thanks</p>