WPF多线程有关问题求教大神解答，

WPF多线程问题求教大神解答，在线等！
小白才开始用WPF，要做一个点击当前图片然后出现一个新窗体，因为新窗体加载数据有点多，想在新窗体没有出现之前做一个loading的效果。但是对多线程了解不多也不知道WPF中的这种多线程该怎么处理。求大神指教啊啊啊啊啊啊啊啊啊啊啊啊啊啊
 private void gameImage1_MouseDown(object sender, MouseButtonEventArgs e)
{ 
  try{
    ShowLoading(true);
  if (image.MakerId != null)
  { 
     string[] str=new string[]{image.MakerId,image.Banner};
     thread = new Thread(new ParameterizedThreadStart(gameLaunch));
     thread.SetApartmentState(ApartmentState.STA);
     thread.IsBackground = true;
     thread.Start(str);
   }

}catch{}
finally
{
   ShowLoading(false);
} 
}

 private void gameLaunch(object obj)
{
   string[] str = obj as string[];
   int game = int.Parse(str[0]);
   string brandName = str[1];
  WindXLive wind = new WindXLive();
  wind.Show();
  System.Windows.Threading.Dispatcher.Run();
  return; 
}

private void ShowLoading(bool isShow)
        {
            if (isShow)
            {
                loading.Visibility = Visibility.Visible;
            }
            else
            {
                loading.Visibility = Visibility.Collapsed;
            }
        }


我现在是loading做了个用户控件，放在别的地方loading可以转动，但是放在这里可能是加载数据占用了线程，loading一直卡住不动 
[解决办法]
例如
前台，后面记得给和夸全部的，为了显示挡住全屏的效果

<Window x:Class="WPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        
        <Grid x:Name="aaa" Grid.RowSpan="4" Visibility="Collapsed">
            
        </Grid>
    </Grid>
</Window>

<UserControl x:Class="WPF.UC"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid Height="200" Width="300">
        <Label>Loding......</Label>
    </Grid>
</UserControl>


在第一个页面的后台代码

[code=csharp]using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data; 
 
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WPF
{
    
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        Thread t;

        public MainWindow()
        {
            InitializeComponent();
            this.Loaded += MainWindow_Loaded;
        }

        void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            t = new Thread(new ThreadStart(show));
            t.Start();
        }

        void show()
        {
            this.aaa.Dispatcher.Invoke(new Action(() =>
            {
                this.aaa.Children.Add(new UC());
                this.aaa.Visibility = Visibility.Visible;
            }));
            
            //相当于做其他的事情
            Thread.Sleep(3000);
            this.aaa.Dispatcher.Invoke(new Action(() =>
            {
                this.aaa.Visibility = Visibility.Collapsed;
            }));
            
            t.Abort();
        }
    }
}