按钮，该按钮将复选框动态插入到wpf中的复选框列表中。

Question

我有两个comboBoxes (m和t)，每个项目都有。根据它们的组合，我会显示一个复选框列表。

为了显示想要的复选框(取决于comboBoxes上选定的项)，我使用了一个updateList()方法。

要知道所有项目，并选择m和t，我将它们设置为全局变量。

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>

​

代码背后

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
    }
}

这样做的结果是：

​

​

但是，我希望在复选框列表的末尾包含一个按钮，所以当单击它时，它会向列表中添加其他复选框(可能是询问复选框的名称.)

如果用户决定其他、m、和t组合，然后返回，则不必记住其他添加的复选框组合。

我想要的是：

​

​

Answer 1

在使用WPF时，您确实应该使用MVVM模式。当项目变得更加复杂时，像使用Windows窗体一样使用WPF只会使其与Windows窗体一样有效。你选择了WPF，因为它与Windows窗体相比有多强大，对吗？然后使用MVVM使这个电源可用。

至于你的按钮:你已经这么做了。单击按钮时，只需添加一个项目，就像您已经做的那样：

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