c# - 将复选框动态插入到wpf中的复选框列表的按钮

Question

我有两个组合框(m 和t)，每个组合框都有一些项目。根据它们的组合，我显示了一个复选框列表。

为了根据组合框上的选定项目显示想要的复选框，我使用了 updateList() 方法。

为了知道所有项目，并选择了m和t，我把它们设为全局变量

xaml

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>

    <ComboBox
    HorizontalAlignment="Left"
    Margin="93,12,0,0"
    VerticalAlignment="Top"
    Width="120"
    Loaded="ComboBoxModulo_Loaded"
    SelectionChanged="ComboBoxModulo_SelectionChanged"/>

    <ComboBox
    HorizontalAlignment="Left"
    Margin="93,80,0,0"
    VerticalAlignment="Top"
    Width="120"
    Loaded="ComboBoxTipo_Loaded"
    SelectionChanged="ComboBoxTipo_SelectionChanged"/>

    <ListBox ItemsSource="{Binding List}" Margin="318,12,12,22">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox IsChecked="{Binding Selected}" Content="{Binding Texto}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

    <Button Margin="318,5,5,5" Padding="3" Content="GET SELECTED INFO"
   Grid.Row="1" Click="Button_Click"/>
    <Label Content="M" Height="28" HorizontalAlignment="Left" Margin="12,12,0,0" Name="labelModulo" VerticalAlignment="Top" />
    <Label Content="T" Height="28" HorizontalAlignment="Left" Margin="12,74,0,0" Name="labelTipo" VerticalAlignment="Top" />
</Grid>

代码隐藏

using System;
using System.Collections.Generic;
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;
using System.Collections.ObjectModel;
using System.ComponentModel;

namespace mt
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        /*public MainWindow()
        {
            InitializeComponent();
        }*/

        public ObservableCollection<BoolStringClass> List { get; set; }
        public string m;
        public string t;

        private void ComboBoxModulo_Loaded(object sender, RoutedEventArgs e)
        {
            List<string> mList = new List<string>();
            mList.Add("m1");
            mList.Add("m2");
            var comboBox = sender as ComboBox;
            comboBox.ItemsSource = mList;
            comboBox.SelectedIndex = 0;
        }
        private void ComboBoxModulo_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var comboBox = sender as ComboBox;
            string mSelect = comboBox.SelectedItem as string;
            m = mSelect;
            updateList();
        }

         private void ComboBoxTipo_Loaded(object sender, RoutedEventArgs e)
        {
            List<string> tList = new List<string>();
            tList.Add("t1");
            tList.Add("t2");
            var comboBox = sender as ComboBox;
            comboBox.ItemsSource = tList;
            comboBox.SelectedIndex = 0;            
        }
        private void ComboBoxTipo_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var comboBox = sender as ComboBox;
            string tSelect = comboBox.SelectedItem as string;
            t = tSelect;
            updateList();
        }

        void updateList()
        {
            List.Clear();
            if (m == "m1" && t == "t1")
            {
                List.Add(new BoolStringClass { Selected = true, Texto = "m1 t1" });
                List.Add(new BoolStringClass { Selected = true, Texto = "m1 t1" });
            }
            else if (m == "m1" && t == "t2")
            {
                List.Add(new BoolStringClass { Selected = true, Texto = "m1 t2" });
                List.Add(new BoolStringClass { Selected = true, Texto = "m1 t2" });
            }
            else if (m == "m2" && t == "t1")
            {
                List.Add(new BoolStringClass { Selected = true, Texto = "m2 t1" });
                List.Add(new BoolStringClass { Selected = true, Texto = "m2 t1" });
            }
            else if (m == "m2" && t == "t2")
            {
                List.Add(new BoolStringClass { Selected = true, Texto = "m1 t2" });
                List.Add(new BoolStringClass { Selected = true, Texto = "m1 t2" });
            }
            this.DataContext = this;       
        }




        public MainWindow()
        {

            InitializeComponent();
            List = new ObservableCollection<BoolStringClass>();


        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            //Get a List<BoolStringClass> that contains all selected items:
            var res = (
                    from item in List
                    where item.Selected == true
                    select item
                ).ToList<BoolStringClass>();

            //Convert all items to a concatenated string:
            var res2 =
                    from item in List
                    select item.Texto + (item.Selected ? " selected." : " NOT selected.");
            MessageBox.Show("title:\r\n\r\n" +
                string.Join("\r\n" + "m: "+m + " t:" + t, new List<string>(res2).ToArray()));
        }

    }

    public class BoolStringClass : INotifyPropertyChanged
    {
        public string Texto { get; set; }

        //Provide change-notification for Selected
        private bool _fIsSelected = false;
        public bool Selected
        {
            get { return _fIsSelected; }
            set
            {
                _fIsSelected = value;
                this.OnPropertyChanged("Selected");
            }
        }

        #region INotifyPropertyChanged

        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged(string strPropertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(strPropertyName));
        }

        #endregion
    }
}

结果:

但是我想在复选框列表的末尾包含一个按钮，所以当它被点击时它会添加其他复选框到列表中(可能会询问复选框的名称......)

如果用户决定其他 m 和 t 组合然后返回，则无需记住其他添加的复选框组合。

我想要这样的东西:

Answer 1

在使用 WPF 时，您应该真正使用 MVVM 模式。当您的项目变得更加复杂时，像使用 Windows 窗体一样使用 WPF 将使其仅与 Windows 窗体一样有效。与 Windows 窗体相比，您选择 WPF 是因为它具有所有强大功能，对吗？然后使用 MVVM 来获得这种能力。

至于您的按钮:您已经这样做了。单击该按钮时，只需像您已经做的那样添加一个项目:

List.Add(new BoolStringClass { Selected = true, Texto = "NEW ENTRY" });