How To: Easy print and print preview with RadGridView for WPF

Using FixedDocument, DocumentViewer and PrintDialog you can easily create your own print and/or print preview for RadGridView for WPF.

I’ve made two extension methods Print() and PrintPreview() to illustrate how to turn the grid into a print friendly document in few lines of code:
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public static void PrintPreview(this GridViewDataControl source)
{
    var window = new Window()
    {
        Title = "Print Preview",
        Content = new DocumentViewer()
        {
            Document = ToFixedDocument(ToPrintFriendlyGrid(source), new PrintDialog())
        }
    };

    window.ShowDialog();
}

public static void Print(this GridViewDataControl source, bool showDialog)
{
    var dialog = new PrintDialog();
    var dialogResult = showDialog ? dialog.ShowDialog() : true;

    if (dialogResult == true)
    {
        var viewer = new DocumentViewer();
        viewer.Document = ToFixedDocument(ToPrintFriendlyGrid(source), dialog);
        dialog.PrintDocument(viewer.Document.DocumentPaginator, "");
    }
}
…