C# WPF:无法将项添加到组合框

本文关键字：添加 组合 WPF | 更新日期: 2023-09-27 18:30:32

我有一个组合框，我尝试在其中添加当前进程（其窗口标题）。我的代码是：

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    List<ComboBoxItem> list = new List<ComboBoxItem>();
    ComboBoxItem item;
    Process[] _processes = Process.GetProcesses();
    foreach (Process process in _processes)
    {
        item = new ComboBoxItem();
        item.Content = process.MainWindowTitle;
        item.ToolTip = process.MainWindowTitle;
        list.Add(item)
    }
    cbProcesses.ItemsSource = list;
}

和 XAML：

<ComboBox x:Name="cbProcesses" HorizontalAlignment="Left" Margin="101,40,0,0" VerticalAlignment="Top" Width="120" SelectionChanged="comboProcesses_Selected" IsSynchronizedWithCurrentItem="True" SelectedIndex="0">
            <ComboBox.ItemContainerStyle>
                <Style TargetType="ComboBoxItem" BasedOn="{StaticResource {x:Type ComboBoxItem}}">
                    <EventSetter Event="MouseEnter" Handler="cbProcesses_MouseEnter" />
                </Style>
            </ComboBox.ItemContainerStyle>
</ComboBox>

尝试cbProcesses.ItemsSource = list时崩溃。我能做什么？

C# WPF:无法将项添加到组合框

这对我来说是完美的：

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <ComboBox x:Name="cbProcesses" HorizontalAlignment="Left" Margin="101,40,0,0" VerticalAlignment="Top" Width="120" IsSynchronizedWithCurrentItem="True" SelectedIndex="0">
            <ComboBox.ItemContainerStyle>
                <Style TargetType="ComboBoxItem" BasedOn="{StaticResource {x:Type ComboBoxItem}}">
                    <EventSetter Event="MouseEnter" Handler="cbProcesses_MouseEnter" />
                </Style>
            </ComboBox.ItemContainerStyle>
        </ComboBox>
    </Grid>
</Window>

C#：

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
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>
    /// Interaktionslogik für MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.Loaded += MainWindow_Loaded;
        }
        void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            List<ComboBoxItem> list = new List<ComboBoxItem>();
            ComboBoxItem item;
            Process[] _processes = Process.GetProcesses();
            foreach (Process process in _processes)
            {
                if (!String.IsNullOrEmpty(process.MainWindowTitle))
                {
                    item = new ComboBoxItem();
                    item.Content = process.MainWindowTitle;
                    item.ToolTip = process.MainWindowTitle;
                    list.Add(item);
                }
            }
            cbProcesses.ItemsSource = list;
        }
        private void cbProcesses_MouseEnter(object sender, MouseEventArgs e)
        {
        }
    }
}

我只是补充说：if (!String.IsNullOrEmpty(process.MainWindowTitle))

相关文章：