The WPF does not have a native "PrintPreview" dialog as it is there in Winforms. In this blog we will discuss how we can use DocumentViewer control for print previewing WPF Flexgrid. The process involves creation of an XpsDocument and loads that document using DocumentViewer. For this we will modify the PrintingWPF product sample.

Design MainWindow.xaml

Open the PrintingWPF sample available at the location C:\Users\\Documents\ComponentOne Samples\Studio for WPF\C1.WPF.FlexGrid\CS\PrintingWPF. Add 'Print Preview...' button along with the 'Advanced...' button on the Main Window. Double click on the button subscribe Click event.

Add References

In the Solution Explorer, add reference to the following class libraries :

• ReachFramework.dll
• System.Printing.dll

In the Main.Window.cs add the following using directive to code. using System.Windows.Xps; using System.Windows.Xps.Packaging;

Adding code for Print Preview

In the Preview button click event, use the following code in which we create an XpsDocument containing the WPF Flexgrid and view the document DocumentViewer, the DocumentViewer is then added to a Window object which serves as the PrintPreview Dialog :

// printing with Preview  
void \_btnPreview\_Click(object sender, RoutedEventArgs e)  
{  
 var pd = new PrintDialog();  

 // calculate page size  
 var sz = new Size(pd.PrintableAreaWidth, pd.PrintableAreaHeight);  

 // create paginator  
 var paginator = new FlexPaginator(_flex, ScaleMode.PageWidth, sz, new Thickness(96 / 4), 100);  
 string tempFileName = System.IO.Path.GetTempFileName();  

 File.Delete(tempFileName);  

 using (XpsDocument xpsDocument = new XpsDocument(tempFileName, FileAccess.ReadWrite))  
 {  
 XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(xpsDocument);  
 writer.Write(paginator);  
 DocumentViewer previewWindow = new DocumentViewer  
 {  
 Document = xpsDocument.GetFixedDocumentSequence()  
 };  

 Window printpriview = new Window();  
 printpriview.Content = previewWindow;  
 printpriview.Title = "C1FlexGrid: Print Preview";  
 printpriview.Show();  
 }  
}

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