title: Setting DefaultValue to first and last date of current month
body: <p>How can I set the <code>DefaultValue</code>'s in the following code to the start date <em>(first ControlParameter)</em> and last date <em>(second ControlParameter)</em> of the current month?</p>
  
  <pre><code>&lt;SelectParameters&gt;
      &lt;asp:ControlParameter ControlID="txtFromDate" Name="ExpenseDate" PropertyName="Text"
           Type="String" DefaultValue="01-05-2013" ConvertEmptyStringToNull="true" /&gt;
      &lt;asp:ControlParameter ControlID="txtToDate" Name="ExpenseDate2" PropertyName="Text" 
           Type="String" DefaultValue="30-05-2013" ConvertEmptyStringToNull="true" /&gt;
  &lt;/SelectParameters&gt;
  </code></pre>