How to: Find Text Using a Keyboard Shortcut

• Aug 01, 2018
• 2 minutes to read

Note

The complete sample project is available at https://github.com/DevExpress-Examples/how-to-find-text-using-a-keyboard-shortcut

This example shows how to execute the Find Next action by pressing the F3 shortcut.

To do this, handle the PdfViewerControl.KeyDown event. If the F3 key is pressed, call the PdfViewerControl.FindText method and pass the search parameters represented by the TextSearchParameter object (e.g, search text, whole words, case sensitive).

C#

using System.Windows;
using System.Windows.Input;
using DevExpress.Xpf.DocumentViewer;

namespace FindText {
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
            viewer.OpenDocument(@"..\..\Demo.pdf");
        }

        private void viewer_KeyDown(object sender, KeyEventArgs e) {
            if (e.Key == Key.F3) {
                TextSearchParameter parameters = new TextSearchParameter {
                    IsCaseSensitive = true,
                    WholeWord = true,
                    Text = "Viewer"
                };
                viewer.FindText(parameters);
            }
        }
    }
}

VB.NET

Imports System.Windows
Imports System.Windows.Input
Imports DevExpress.Xpf.DocumentViewer

Namespace FindText
    Partial Public Class MainWindow
        Inherits Window

        Public Sub New()
            InitializeComponent()
            viewer.OpenDocument("..\..\Demo.pdf")
        End Sub

        Private Sub viewer_KeyDown(ByVal sender As Object, ByVal e As KeyEventArgs)
            If e.Key = Key.F3 Then
                Dim parameters As TextSearchParameter = New TextSearchParameter With { _
                    .IsCaseSensitive = True, _
                    .WholeWord = True, _
                    .Text = "Viewer" _
                }
                viewer.FindText(parameters)
            End If
        End Sub
    End Class
End Namespace

XML

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:FindText"
        xmlns:dxpdf="http://schemas.devexpress.com/winfx/2008/xaml/pdf" x:Class="FindText.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxpdf:PdfViewerControl x:Name="viewer" KeyDown="viewer_KeyDown"/>
    </Grid>
</Window>