C# WPF 窗口不透明度更改错误

本文关键字：错误 不透明度 WPF 窗口 | 更新日期: 2023-09-27 18:32:00

我正在使用WPF处理一个c#项目，但我遇到了一个问题，这让我:)这就是问题所在。我正在尝试使用计时器更改新窗口的不透明度。但是当我运行该项目时，"这个。不透明度 += .1;" 代码引发异常，例如"无效操作等..."我正在从 MainWindow .cs 文件中打开一个窗口，其中包含以下代码：

private void MenuItemArchiveClick(object sender, RoutedEventArgs e)
    {
        var archiveWindow = new ArchiveWindow();
        var screenSize = System.Windows.Forms.Screen.PrimaryScreen.Bounds;
        archiveWindow.Width = (screenSize.Width * 95) / 100;
        archiveWindow.Height = (screenSize.Height * 90) / 100;
        archiveWindow.WindowStartupLocation = WindowStartupLocation.CenterScreen;
        archiveWindow.Margin = new Thickness(0, 10, 0, 0);
        archiveWindow.AllowsTransparency = true;
        archiveWindow.Opacity = 0.1;
        archiveWindow.Topmost = true;
        archiveWindow.Show();
    }

我的存档窗口代码是，

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Timers;
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.Shapes;
namespace POCentury
{
    /// <summary>
    /// Interaction logic for ArchiveWindow.xaml
    /// </summary>
    public partial class ArchiveWindow : Window
    {
        Timer timer1 = new Timer();
        public ArchiveWindow()
        {
            InitializeComponent();
            timer1.Interval = 1 * 1000;
            timer1.Elapsed += new ElapsedEventHandler(opacityChange);
            timer1.Enabled = true;
            timer1.AutoReset = false;
            timer1.Start();
        }
        private void opacityChange(object sender, EventArgs a)
        {
            if (this.Opacity == 1)
            {
                timer1.Stop();
            }
            else
            {
                this.Opacity += .1;
            }
        }
        private void ArchiveWindowClose()
        {
            timer1.Stop();
            this.Close();
        }
        private void btnArchiveWindowClose(object sender, RoutedEventArgs e)
        {
            ArchiveWindowClose();
        }
        private void imgPatternClick(object sender, MouseButtonEventArgs e)
        {
            MessageBox.Show("sd");  
        }
    }
}

你能帮我这样做吗？非常感谢！

C# WPF 窗口不透明度更改错误

基本上，您无法访问 opacityChange 事件中的计时器，因为它发生在不同的线程中。您需要调度程序来执行此操作。

Dispatcher.BeginInvoke(new Action(() =>
{
        if (this.Opacity == 1)
        {
            timer1.Stop();
        }
        else
        {
            this.Opacity += .1;
        }
}));
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