title: Set focus to a column filter in an Infragistics WebDataGrid
body: <p>I am using an Infragistics NetAdvantage WebDataGrid with filtering set. </p>
  
  <p>On page load, I would like to open the first filter’s textbox, and set the focus there, so that it is ready for the user to start typing the text with which to filter.  </p>
  
  <p><img src="https://i.stack.imgur.com/sxuAx.png" alt="enter image description here"></p>
  
  <p>I have seen an example online of how to do this for the jQuery grid, but not for the WebDataGrid  </p>
  
  <p>I want something along the lines of: </p>
  
  <pre><code>         myWebDataGrid.Behaviors.Filtering.ColumnFilters[2].RuleTextNode.focus; 
  </code></pre>
  
  <p>I am using  Infragistics35.Web.v11.2, Version=11.2.20112.2025  </p>