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PdfViewer.RemoveService(Type) Method

Removes the service of the specified type from the service container.

Namespace: DevExpress.XtraPdfViewer

Assembly: DevExpress.XtraPdfViewer.v24.2.dll

NuGet Package: DevExpress.Win.PdfViewer

#Declaration

public void RemoveService(
    Type serviceType
)

#Parameters

Name Type Description
serviceType Type

The type of service to remove.

#Remarks

The PdfViewer control implements IServiceProvider and IServiceContainer interfaces. In addition to providing services, it also provides a mechanism for adding and removing services. To obtain a service, call the PdfViewer.GetService<T> method.

#Example

This example shows how to modify the functionality of an existing PdfViewer command.

The PdfViewer exposes the IPdfViewerCommandFactoryService interface that enables you to substitute the default command with your own custom command.

To accomplish this task:

  • Create a custom command class (for example, a CustomNextPageCommand class), inherited from the command that you wish to replace (for example, PdfNextPageCommand).
  • Override the required method of the command. The main functionality and command specifics are located in the Execute method.
  • Create a class (for example, CustomPdfViewerCommandFactoryService) that implements the IPdfViewerCommandFactoryService. You should override the IPdfViewerCommandFactoryService.CreateCommand method to create an instance of a custom command class if an identifier of a certain command is passed as a parameter. So, instead of the default command, a custom command will be used by the PdfViewer.
  • Use the created class to substitute for the default PdfViewer’s service.

View Example

using DevExpress.XtraPdfViewer;
using System;
using System.Windows.Forms;

namespace ViewerCustomCommand {
    public partial class Form1 : Form {

        void ReplacePdfViewerCommandFactoryService(PdfViewer control) {
            IPdfViewerCommandFactoryService service = control.GetService<IPdfViewerCommandFactoryService>();
            if (service == null)
                return;
            control.RemoveService(typeof(IPdfViewerCommandFactoryService));
            control.AddService(typeof(IPdfViewerCommandFactoryService), new CustomPdfViewerCommandFactoryService(control,service));
        }

        public Form1() {
            InitializeComponent();
            pdfViewer1.LoadDocument("..\\..\\Demo.pdf");
            ReplacePdfViewerCommandFactoryService(pdfViewer1);
        }     
    }
}
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Threading.Tasks
Imports System.Windows.Forms

Namespace ViewerCustomCommand
    Friend NotInheritable Class Program

        Private Sub New()
        End Sub

        ''' <summary>
        ''' The main entry point for the application.
        ''' </summary>
        <STAThread> _
        Shared Sub Main()
            Application.EnableVisualStyles()
            Application.SetCompatibleTextRenderingDefault(False)
            Application.Run(New Form1())

        End Sub
    End Class
End Namespace

The following code snippets (auto-collected from DevExpress Examples) contain references to the RemoveService(Type) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

See Also