[Sommaire] [Imprimer]

   1  <com:TContent ID="body" >
   2  
   3  <h1 id="2401">TExpression</h1>
   4  <com:DocLink ClassPath="System.Web.UI.WebControls.TExpression" />
   5  
   6  <p>
   7  <tt>TExpression</tt> evaluates a PHP expression and displays the evaluation result. To specify the expression to be evaluated, set the <tt>Expression</tt> property. Note, <tt>TExpression</tt> evaluates the expression during the rendering control lifecycle.
   8  </p>
   9  
  10  <p>
  11  The context of the expression in a <tt>TExpression</tt> control is the control itself. That is, <tt>$this</tt> represents the control object if it is present in the expression. For example, the following template tag will display the title of the page containing the <tt>TExpression</tt> control.
  12  </p>
  13  <com:TTextHighlighter Language="prado" CssClass="source">
  14  &lt;com:TExpression Expression="$this->Page->Title" /&gt;
  15  </com:TTextHighlighter>
  16  
  17  <p>
  18  Be aware, since <tt>TExpression</tt> allows execution of arbitrary PHP code, in general you should not use it to evaluate expressions submitted by your application users.
  19  </p>
  20  
  21  <com:RunBar PagePath="Controls.Samples.TExpression.Home" />
  22  
  23  </com:TContent>