由于您没有显示完整的BackgroundWorker代码，所以我无法确定您是否正确实现了它。这样，我所能做的就是向您展示一个更新ProgressBar控件的简单工作示例：
UserControl XAML：
<UserControl x:Class="WpfApplication1.Views.TestView"
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" Loaded="UserControl_Loaded">
<ProgressBar x:Name="progressBar" Height="25" Margin="20" Minimum="0"
Maximum="50" />
</UserControl>
MainWindow XAML：
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Views="clr-namespace:WpfApplication1.Views"
Title="MainWindow" Height="350" Width="525">
<Views:TestView />
</Window>
UserControl 后面的代码：
using System.ComponentModel;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
namespace WpfApplication1.Views
{
public partial class TestView : UserControl
{
private BackgroundWorker backgroundWorker = new BackgroundWorker();
public TestView()
{
InitializeComponent();
backgroundWorker.WorkerReportsProgress = true;
backgroundWorker.ProgressChanged += ProgressChanged;
backgroundWorker.DoWork += DoWork;
// not required for this question, but is a helpful event to handle
backgroundWorker.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;
}
private void UserControl_Loaded(object sender, RoutedEventArgs e)
{
backgroundWorker.RunWorkerAsync();
}
private void DoWork(object sender, DoWorkEventArgs e)
{
for (int i = 0; i <= 100; i++)
{
// Simulate long running work
Thread.Sleep(100);
backgroundWorker.ReportProgress(i);
}
}
private void ProgressChanged(object sender, ProgressChangedEventArgs e)
{
// This is called on the UI thread when ReportProgress method is called
progressBar.Value = e.ProgressPercentage;
}
private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// This is called on the UI thread when the DoWork method completes
// so it's a good place to hide busy indicators, or put clean up code
}
}
}
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