用户控件中的自定义方法

我有一个用户控件（ItemPairing），其中包括两个组合框和一个按钮。我知道我可以重写 ToString（） 方法，但我想做的是创建一个返回数组或字典的自定义方法。组合框项在生成控件时提供，因此这些项将作为参数传递给初始化。应用程序将添加多个 ItemPairing 控件（用户可以添加和删除 ItemPairing 控件以满足其需求），然后在用户单击"运行"按钮时循环访问所有 ItemPairing 控件。

如果有更简单的方法可以做到这一点，请告诉我。一般的想法是让用户动态构建配对的项目，然后在他们单击运行时将每对项目合并到单个字典中。

项目配对 XAML：

<UserControl x:Class="TableComparisons.ItemPairing"
         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" 
         x:Name="ItemPairingName"
         mc:Ignorable="d" 
         d:DesignHeight="24" d:DesignWidth="300">
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="24"/>
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="24"/>
    </Grid.RowDefinitions>
    <ComboBox Grid.Row="0" Grid.Column="0" x:Name="Table1_Fields" SelectionChanged="Table1_Fields_SelectionChanged">
    </ComboBox>
    <ComboBox Grid.Row="0" Grid.Column="1" x:Name="Table2_Fields" SelectionChanged="Table2_Fields_SelectionChanged">
    </ComboBox>
    <Button Grid.Row="0" Grid.Column="2" Content="X" Click="Button_Click" />
</Grid>

ItempPairing C#：

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;
namespace TableComparisons
{
public partial class ItemPairing : UserControl
{
    public string selectExpr = "None";
    public string fields1 = "";
    public string fields2 = "";
    public override string ToString()
    {
        return selectExpr;
    }
    private void updateSE()
    {
        selectExpr = this.fields1 + " = " + this.fields2;
    }
    public ItemPairing()
    {
        InitializeComponent();
        List<string> listFields_1 = new List<string>();
        listFields_1.Add("One");
        listFields_1.Add("Two");
        listFields_1.Add("Three");
        listFields_1.Add("Four");
        Table1_Fields.ItemsSource = listFields_1;
        List<string> table2Fields = new List<string>();
        table2Fields.Add("A");
        table2Fields.Add("B");
        table2Fields.Add("C");
        table2Fields.Add("D");
        Table2_Fields.ItemsSource = table2Fields;
    }
    public ItemPairing(List<string> table1Fields, List<string> table2Fields)
    {
        InitializeComponent();
        Table1_Fields.ItemsSource = table1Fields;
        Table2_Fields.ItemsSource = table2Fields;
    }
    private void Button_Click(object sender, RoutedEventArgs e)
    {
        ((Panel)this.Parent).Children.Remove(this);
    }
    private void Table1_Fields_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        fields1 = this.Table1_Fields.SelectedValue.ToString();
        updateSE();
    }
    private void Table2_Fields_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        fields2 = this.Table2_Fields.SelectedValue.ToString();
        updateSE();
    }
}
}

添加子项目配对：

UIElement pi2 = new ItemPairing(table1Fields, table2Fields);
ParingItems.Children.Add(pi2);

循环访问项目配对控件：

private void runPairing_Click(object sender, RoutedEventArgs e)
{
    int oCount = 1;
    foreach (object o in ParingItems.Children)
    {
        if (o.GetType() == typeof(ItemPairing))
        {
            MessageBox.Show(o.ToString());
            oCount++;
        }
    }
}

private Dictionary<string, string>
private void updateSE()
{
    selectExpr = this.fields1 + " = " + this.fields2;
    if (!this.dictionary.ContainsKey(this.fields1))
    {
        this.dictionary.Add(this.fields1, this.fields2);
    }
}
public Dictionary<string, string> GetPairSelections()
{
    return this.dictionary;
}

public static readonly DependencyProperty ResultsProperty = DependencyProperty.
    Register("Results", typeof(Dictionary<string, string>), 
    typeof(ItemPairing), new UIPropertyMetadata(Dictionary<string, string>.Empty));
public Dictionary<string, string> Results
{
    get { return (Dictionary<string, string>)GetValue(ResultsProperty); }
    set { SetValue(ResultsProperty, value); }
}

<YourXmlNamespace:ItemPairing Results="{Binding YourExternalResultsProperty}" />