# C1.WPF.Word.C1WordDocument.DrawingElement ## Content

DrawingElement Event

Occurs when the C1WordDocument is about to render a FrameworkElement.

Namespace: C1.WPF.Word
Assembly: C1.WPF.Word.4.6.2.dll
Syntax
public event EventHandler<DrawingElementEventArgs> DrawingElement
Returns
Type Description
EventHandler<DrawingElementEventArgs> Occurs when the is about to render a .
Remarks
<p>This event fires once for each <xref href="System.Windows.FrameworkElement" data-throw-if-not-resolved="false"></xref> rendered after calls to the

DrawElement(FrameworkElement, Rect, Rect) method. The event allows you to override the built-in rendering behavior and to render custom content for specific elements.

If you handle this event, then remember to set the Handled property to true so the control will not render the element over your custom content.

Examples
<p>The example below shows how you can use the <xref href="C1.WPF.Word.C1WordDocument.DrawingElement" data-throw-if-not-resolved="false"></xref> event to provide custom

rendering for elements of type 'RichTextBox'. The code checks the type of element being rendered. If the element is a 'RichTextBox', the code creates a WriteableBitmap to represent the object, then renders the image into the PDF document.

This example is quite general. You can use it to render any elements that do not expose their child elements as primitives such as TextBlock, Border, rectangle, etc.

The drawback associated with rendering elements as images is that the output will contain raster images, which can be quite large and may look rough when you zoom in on the PDF.

<pre><code class="lang-csharp">// create C1WordDocument
var rtf = new C1WordDocument(PaperKind.Letter);

// use DrawingElement event to render RichTextBox elements
pdf.DrawingElement += (s, e) =>
  {
    if (e.Element is RichTextBox)
    {
      // get element image
      #if SILVERLIGHT
      var bmp = new WriteableBitmap(e.Element, e.DocumentTransform);
      #else // WPF
      var sz = e.Element.RenderSize;
      var rtBmp = new RenderTargetBitmap((int)sz.Width, (int)sz.Height, 96, 96, PixelFormats.Pbgra32);
      rtBmp.Render(e.Element);
      var bmp = new WriteableBitmap(rtBmp);
      #endif

      // render it into the document
      rtf.DrawImage(bmp, e.Bounds);

      // done rendering this element
      e.Handled = true;
    }
  };

// render LayoutRoot element into C1PdfDocument
var rc = pdf.PageRectangle;
rc.Inflate(-20, -20);
pdf.DrawElement(LayoutRoot, rc, ContentAlignment.TopLeft, Stretch.None);</code></pre>