WPF 如何在基础控件上显示 Loading 等待动画
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框架使用
.NET4 至 .NET6； -
Visual Studio 2022; -
使用方式需引入命名空间后设置控件的附加属性
wd:Loading.IsShow="true"，即可显示默认等待动画效果如下：
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如需自定义
Loading一定要 先设置wd:Loading.Child在设置IsShow="true"。 -
显示不同
Loading内容需wd:Loading.Child ={x:Static wd:NormalLoading.Default}进行复赋值显示NormalLoading效果如下：
实现代码
1）创建 BasicControlsExample.xaml 代码如下:
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<UserControl x:Class="WPFDevelopers.Samples.ExampleViews.BasicControlsExample" 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" xmlns:local="clr-namespace:WPFDevelopers.Samples.ExampleViews" xmlns:wpfdev="https://github.com/WPFDevelopersOrg/WPFDevelopers" xmlns:controls="clr-namespace:WPFDevelopers.Samples.Controls" mc:Ignorable="d" Background="{DynamicResource BackgroundSolidColorBrush}" d:DesignHeight="450" d:DesignWidth="800" Name="MyBasicControls"><TextBlock Text="Loading" FontSize="20" Margin="0,20,0,0"/> <WrapPanel Margin="0,10"> <Button Content="Loading" Click="Loading_Click" Style="{DynamicResource PrimaryButton}"/> <Button Name="btnLoadingTask" Content="LoadingTask" Click="LoadingTask_Click" Style="{DynamicResource SuccessPrimaryButton}" Margin="10,0"/> <Button Name="btnLoading" Click="BtnLoading_Click" Content="AddLoading" wpfdev:Loading.Child="{x:Static wpfdev:NormalLoading.Default}" Style="{DynamicResource WarningPrimaryButton}"/> <Button Name="btnOffTask" Click="BtnOffTask_Click" Margin="10,0" Content="Off Task" Style="{DynamicResource DangerPrimaryButton}"/> </WrapPanel> </UserControl> |
2）逻辑 BasicControlsExample.xaml.cs 代码如下:
对控件进行等待动画。
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private void Loading_Click(object sender, RoutedEventArgs e) { var task = new Task(() => { Thread.Sleep(5000); }); task.ContinueWith(previousTask => { Loading.SetIsShow(MyBasicControls, false); }, TaskScheduler.FromCurrentSynchronizationContext()); Loading.SetIsShow(MyBasicControls, true); task.Start(); } |
基础控件上添加等待动画。
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private void BtnLoading_Click(object sender, RoutedEventArgs e) { var task = new Task(() => { Thread.Sleep(5000); }); task.ContinueWith(previousTask => { Loading.SetIsShow(btnLoading, false); }, TaskScheduler.FromCurrentSynchronizationContext()); Loading.SetIsShow(btnLoading, true); task.Start(); } |
关闭基础控件的等待动画。
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private void BtnOffTask_Click(object sender, RoutedEventArgs e) { if (tokenSource == null) return; tokenSource.Cancel(); Loading.SetIsShow(btnLoadingTask, false); } private CancellationTokenSource tokenSource; private void LoadingTask_Click(object sender, RoutedEventArgs e) { tokenSource = new CancellationTokenSource(); var cancellationToken = tokenSource.Token; var task = new Task(() => { for (int i = 0; i < 10; i++) { //这里做自己的事情 if (tokenSource.IsCancellationRequested) return; Thread.Sleep(1000); } }, cancellationToken); task.ContinueWith(previousTask => { if (tokenSource.IsCancellationRequested) return; Loading.SetIsShow(btnLoadingTask, false); }, TaskScheduler.FromCurrentSynchronizationContext()); Loading.SetIsShow(btnLoadingTask, true); task.Start(); } |
效果图
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原文链接：https://mp.weixin.qq.com/s/n9zStOH25f0jh6rfUxqnvA
