WPF 按钮事件，非UI堵塞

实例：按钮异步事件，非UI堵塞

// 按钮事件，异步事件，获取结果，非UI堵塞
private async void WindowTask_Click(object sender, EventArgs e)
{
    string getstr = await Task.Run<string>(() =>
    {
        return HttpPost("");
    });
}
public string HttpPost(string Url, string postDataStr = "")
{
    Thread.Sleep(100000);
    return "";
}

　　或者

/// <summary>
/// 按钮事件，异步事件，获取结果，非UI堵塞
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void WindowTask_Click(object sender, EventArgs e)
{
    string getstr = await GetHttpPostStringAsync(this.textBox1.Text);
}

/// <summary>
/// 异步请求，返回请求结果
/// </summary>
/// <param name="Url">请求地址</param>
/// <returns>参数列表</returns>
public async Task<string> GetHttpPostStringAsync(string Url)
{
    return await Task.Run<string>(() =>
    {
        return HttpPost(Url);
    });
}

/// <summary>
/// HTTP POST请求
/// </summary>
/// <param name="Url">URL地址</param>
/// <param name="postDataStr">参数字符串</param>
/// <returns>返回结果</returns>
public string HttpPost(string Url, string postDataStr = "")
{
    string responseData = "";
    
    return responseData;
}

　　MVVM模式

<Button Content="非阻塞" Width="100" Height="50">
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="Click">
            <i:InvokeCommandAction Command="{Binding CommandClcikAsync}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>
</Button>

　　

private DelegateCommand commandClcikAsync;
public DelegateCommand CommandClcikAsync => commandClcikAsync ?? (commandClcikAsync = new DelegateCommand(async () => await ClcikAsync()));
       
private async Task ClcikAsync()
{
    await Task.Run<string>(() =>
    {
        return HttpPost("Url");
    });
}
public string HttpPost(string Url)
{
    Thread.Sleep(100000);
    return "";
}

　　

阻塞模式

阻塞1

System.Windows.Application.Current.Dispatcher.Invoke(() =>
{
   阻塞时间 
});

　　

阻塞2

System.Windows.Application.Current.Dispatcher.BeginInvoke((Action)delegate()
{
    Thread.Sleep(100000);
});

　

阻塞3

private DelegateCommand commandClcik;
public DelegateCommand CommandClcik => commandClcik ?? (commandClcik = new DelegateCommand(() => {
    Thread.Sleep(100000);
}));