title: How to set in Report the TextBox visibility by expression in VisualStudio?
body: <p>I have a simple <em>TextBox</em> in my <em>Precision Design</em> related to a Field in Temporary Table. 
  I need to show this TextBox only If the it value under Temporary Table is pupulated : so if the value field is pupulated (is a string) I show the Text Box , otherwise I don't show the text Box.</p>
  
  <p>I need to set <em>Visibility</em> by <em>Expression</em> : </p>
  
  <p><a href="https://i.stack.imgur.com/aFkFu.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/aFkFu.jpg" alt="set visibility"></a></p>
  
  <p>Which is the best way forward over ? </p>
  
  <p>Thanks!</p>