WPF Dispatcher {“调用线程无法访问此对象，因为另一个线程拥有它。”}

WPF Dispatcher "调用线程无法访问此对象，因为另一个线程拥有它。"

using System;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
namespace WPFDispatcherErrorExample
{
    public partial class MainWindow : Window
    {
        private TextBlock textBlock;
        public MainWindow()
        {
            InitializeComponent();
            textBlock = new TextBlock();
        }
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            Thread thread = new Thread(new ThreadStart(UpdateText));
            thread.Start();
        }
        private void UpdateText()
        {
            // 尝试直接访问UI元素，将会抛出错误
            textBlock.Text = "Hello, World!";
        }
    }
}

private void UpdateText()
{
    // 使用Dispatcher.Invoke在UI线程上更新UI元素
    Dispatcher.Invoke(() =>
    {
        textBlock.Text = "Hello, World!";
    });
}