PdfViewerControl.PrintDocumentCommand Property

Prints the document.

Namespace: DevExpress.UI.Xaml.Controls

Assembly: DevExpress.UI.Xaml.Controls.v21.2.dll

NuGet Package: DevExpress.Uwp.Controls

Declaration

C#

public ICommand PrintDocumentCommand { get; set; }

VB.NET

Public Property PrintDocumentCommand As ICommand

Property Value

Type	Description
ICommand	A command that implements the Windows.UI.Xaml.Input.ICommand interface.

Remarks

To learn more about using commands, refer to MSDN.

The example below illustrates a view model that implements the PrintDocumentCommand.

XAML

<dxpdf:PdfViewerControl ShowOpenDocumentButton="True" 
                                ShowPrintDocumentButton="True" 
                                PrintDocumentCommand="{Binding PrintDocumentCommand}"
                                PrintDocumentSource="{Binding PrintDocumentSource, Mode=TwoWay}"/>

C#

public class MainViewModel : ViewModelBase {

        public ICommand PrintDocumentCommand { get; private set; }
        public IPrintDocumentSource PrintDocumentSource { get; set; }
        CoreDispatcher dispatcher = Window.Current.Dispatcher;


        public MainViewModel() {
            if (ViewModelBase.IsInDesignMode)
                return;

            PrintDocumentCommand = new DevExpress.Mvvm.DelegateCommand(PrintDocument);
        }

        async void PrintDocument() {
            PrintManager.GetForCurrentView().PrintTaskRequested += printManager_PrintTaskRequested;
            await PrintManager.ShowPrintUIAsync();
            PrintManager.GetForCurrentView().PrintTaskRequested -= printManager_PrintTaskRequested;
        }

        void printManager_PrintTaskRequested(PrintManager sender, PrintTaskRequestedEventArgs args) {
            PrintTask printTask = null;
            printTask = args.Request.CreatePrintTask("PdfViewer Demo Print Task", sourceRequested => {
                printTask.Completed += async (s, e) => {
                    if (e.Completion == PrintTaskCompletion.Failed) {
                        await dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () => {
                            await new MessageDialog("Printing error.").ShowAsync();
                        });
                    }
                };
                sourceRequested.SetSource(PrintDocumentSource);
            });
        }

    }

VB.NET

Public Class MainViewModel
    Inherits ViewModelBase

    Public Property PrintDocumentCommand() As ICommand
    Public Property PrintDocumentSource() As IPrintDocumentSource
    Private dispatcher As CoreDispatcher = Window.Current.Dispatcher

    Public Sub New()
        If ViewModelBase.IsInDesignMode Then
            Return
        End If

        PrintDocumentCommand = New DevExpress.Mvvm.DelegateCommand(AddressOf PrintDocument)
    End Sub

    Async Sub PrintDocument()
        AddHandler PrintManager.GetForCurrentView().PrintTaskRequested, AddressOf printManager_PrintTaskRequested
        Await PrintManager.ShowPrintUIAsync()
        RemoveHandler PrintManager.GetForCurrentView().PrintTaskRequested, AddressOf printManager_PrintTaskRequested
    End Sub

    Sub printManager_PrintTaskRequested(sender As PrintManager, args As PrintTaskRequestedEventArgs)
        Dim printTask As PrintTask = Nothing
        printTask = args.Request.CreatePrintTask("PdfViewer Demo Print Task",
                                                 Sub(sourceRequested)
                                                     AddHandler(printTask.Completed), Async Sub(s, e)
                                                                                          If e.Completion = PrintTaskCompletion.Failed Then
                                                                                              Await dispatcher.RunAsync(CoreDispatcherPriority.Normal,
                                                                                                                        Async Sub()
                                                                                                                            Await New MessageDialog("Printing error.").ShowAsync()
                                                                                                                        End Sub)
                                                                                          End If
                                                                                      End Sub
                                                     sourceRequested.SetSource(PrintDocumentSource)
                                                 End Sub)
    End Sub
End Class