Winform中如果想模拟键盘录入可以用SendKeys类，在WPF中一样可以，只需引用WpfSendKeys.dll即可。

1.添加WpfSendKeys.dll的引用；

2.MainWindow.xaml代码如下：

<Window x:Class="WPFKey.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Loaded="Window_Loaded"  
        x:Name="mainWin" Height="301" Width="237">
    <Grid>
        <TextBox x:Name="textbox1" FontSize="20" Margin="2,10,0,219" />
        <Button x:Name="Change" Content="Button" HorizontalAlignment="Left" Margin="56,159,0,0" VerticalAlignment="Top" Width="121" Height="32" Click="Change_Click" />
    </Grid>
</Window>

using System;
using System.Threading;
using System.Windows;
using System.Windows.Input;
using System.Windows.Input.Test;
using System.Windows.Media;
using System.Windows.Threading;


namespace WPFKey
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }


        private void SendToUIThread(UIElement element, string text)
        {
            element.Dispatcher.BeginInvoke(
                new Action(() => { SendKeys.Send(element, text); }),
                DispatcherPriority.Input
            );
        }


        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            ThreadPool.QueueUserWorkItem(_ =>
            {
                SendToUIThread(textbox1, "Happy");
                Thread.Sleep(1000);


                SendToUIThread(textbox1, " N");
                Thread.Sleep(1000);


                SendToUIThread(textbox1, "e");
                Thread.Sleep(1000);


                SendToUIThread(textbox1, "w");
                Thread.Sleep(1000);


                SendToUIThread(textbox1, " Year!");
                Thread.Sleep(1000);




                SendToUIThread(Change, "{ENTER}");
            
            });
        }




        private void Change_Click(object sender, RoutedEventArgs e)
        {
            textbox1.Foreground = new SolidColorBrush(Colors.Red);       
        }
    }
}

代码下载地址

WPF 模拟UI 键盘录入