mahapps ShowProgressAsync 不显示加载程序异步 - WPF (C#)

本文关键字：WPF 异步 程序 ShowProgressAsync 显示 加载 mahapps | 更新日期: 2023-09-27 18:34:50

我对mahapps有问题，显示ShowProgressAsync方法，但没有在底部显示加载颗粒。我认为渲染保持同步是一个问题。

谁能给我一个解决方案？我很难找到问题.

Xaml： 

<controls:MetroWindow x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApplication1"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button Content="Clicca" Width="150" Click="Button_Click" Height="50"></Button>
    </Grid>
</controls:MetroWindow>

代码隐藏：

using MahApps.Metro.Controls;
using MahApps.Metro.Controls.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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 WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : MetroWindow
    {
        ProgressDialogController x;
        public MainWindow()
        {
            InitializeComponent();
        }
        private async void Button_Click(object sender, RoutedEventArgs e)
        {
            x = await this.ShowProgressAsync("test","loading", false) as ProgressDialogController;
        }
    }
}

他们应该在流动的镜头底部出来，但仍然被阻挡

mahapps ShowProgressAsync 不显示加载程序异步 - WPF (C#)

您的意思是要将进度条设置为不确定吗？如果是这种情况，您将在 ShowProgressAsync 之后立即丢失方法调用

private async void Button_Click(object sender, RoutedEventArgs e)
    {
        x = await this.ShowProgressAsync("test", "loading", false) as ProgressDialogController;
        x.SetIndeterminate();
    }

如果要显示实际进度，则应使用 x 的方法SetProgress来报告进度，值从 0 到 1。

您的工作代码不应阻止 UI 线程，以便让 ProgressWindow 显示

var controller = await this.ShowProgressAsync("Please wait", "Doing Something...");
// Your code here
await controller.CloseAsync();

如果代码将阻止 UI 线程，请将其包装在新任务中

var controller = await this.ShowProgressAsync("Please wait", "Doing Something...")
await Task.Run(() =>
{
    // Your code here
}
await controller.CloseAsync();

我一直用来结束异步操作的一些代码是这样的......

var x = await this.ShowProgressAsync("Please wait", "Doing Something...");
// Your Code Here.
await x.CloseAsync().ConfigureAwait(false);

如果您只想让它出现 1 秒钟，那么您可以使用...

var x = await this.ShowProgressAsync("Please wait", "Waiting for 1 second.");
await Task.Delay(1000);
await x.CloseAsync().ConfigureAwait(false);
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