Use Keyboard.Focus to set the focus to a Text Field

  


<Window 
  x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Window1" Height="600" Width="800">
  <DockPanel>
    <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
      <TextBox x:Name="tbxInsertionText" Width="200" Margin="5,0" />
      <Button DockPanel.Dock="Bottom" Content="Insert" Click="btnInsert_Click"/>
    </StackPanel>
    <RichTextBox x:Name="rtbTextContent" />
  </DockPanel>
</Window>
//File:Window.xaml.cs
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void btnInsert_Click(object sender, RoutedEventArgs e)
        {
            if (string.IsNullOrEmpty(tbxInsertionText.Text))
            {
                return;
            }
            rtbTextContent.BeginChange();
            if (rtbTextContent.Selection.Text != string.Empty)
            {
                rtbTextContent.Selection.Text = string.Empty;
            }
            TextPointer tp = rtbTextContent.CaretPosition.GetPositionAtOffset(0, LogicalDirection.Forward);
            rtbTextContent.CaretPosition.InsertTextInRun(tbxInsertionText.Text);
            rtbTextContent.CaretPosition = tp;
            rtbTextContent.EndChange();
            Keyboard.Focus(rtbTextContent);
        }
    }
}

1.	Query Left / Right control key
2.	Query Left / Right Shift key
3.	Is Key.CapsLock Toggled
4.	Keyboard.IsKeyToggled
5.	Query Number lock key
6.	Programmatically Extract an Element's Style with DefaultStyleKeyProperty
7.	Provide Quick Keyboard Access to Buttons
8.	Reading keyboard modifiers
9.	Reading individual key state with Keyboard.IsKeyDown
10.	Suppress Keyboard and Mouse Events
11.	Use KeyBinding to bind Key event to TextBox.InputBindings
12.	StackPanel PreviewTextInput and PreviewKeyDown
13.	If input is not a number do not handle the key event
14.	On Key Down Handler

Use Keyboard.Focus to set the focus to a Text Field : Key Event « Windows Presentation Foundation « C# / C Sharp

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