将 WPF 控件绑定到 class 中的对象，单独形成 class

Question

我创建了下面的 class 试图保持表格 class “干净”，因为在那里没有太多工作，主要只是引用其他 classes 做工作。当代码在 Form class 中时它起作用了，因为我相信 XAML 中的绑定 simlpy 绑定到 MainList、TypeList 等。ObservableCollection 我想如果我创建 CheckedBoxLists [=26= 的实例] 它仍然会找到那些对象并显示它们的数据，但我想这不是它的工作方式。

class CheckedBoxLists
{
    public ObservableCollection<MainFilterCheckedListClass> MainList { get; set; }
    public ObservableCollection<GroupFunctionCheckedListClass> GroupFunctionList { get; set; }
    public ObservableCollection<FormCheckedListClass> FormList { get; set; }
    public ObservableCollection<TypeFilterCheckedListClass> TypeList { get; set; }
    public ObservableCollection<ThicknessFilterCheckedListClass> ThicknessList { get; set; }

    DataTable BoughtProductsMatrix = new DataTable();
    DataTable Distinct_filter_main = new DataTable();
    DataTable Distinct_filter_groupfunction = new DataTable();
    DataTable Distinct_filter_form = new DataTable();
    DataTable Distinct_filter_type = new DataTable();
    DataTable Distinct_filter_thickness = new DataTable();
    public class MainFilterCheckedListClass
    {
        public string MainText { get; set; }
        public bool MainIsSelected { get; set; }
    }
    public class GroupFunctionCheckedListClass
    {
        public string GroupFunctionText { get; set; }
        public bool GroupFunctionIsSelected { get; set; }
    }
    public class FormCheckedListClass
    {
        public string FormText { get; set; }
        public bool FormIsSelected { get; set; }
    }
    public class TypeFilterCheckedListClass
    {
        public string TypeText { get; set; }
        public bool TypeIsSelected { get; set; }
    }
    public class ThicknessFilterCheckedListClass
    {
        public string ThicknessText { get; set; }
        public bool ThicknessIsSelected { get; set; }
    }
    public void LoadFilters(DataTable productMatrix)
    {
        BoughtProductsMatrix = productMatrix;

        int test = BoughtProductsMatrix.Columns.Count;

        DataView productsView = new DataView(BoughtProductsMatrix);
        productsView.RowFilter = "make_or_buy = 'B'";

        DataView view = new DataView(BoughtProductsMatrix);
        DataTable distinct_filter_main = view.ToTable(true, "filter_main");
        DataTable distinct_filter_groupfunction = view.ToTable(true, "filter_groupfunction");
        DataTable distinct_filter_form = view.ToTable(true, "filter_form");
        DataTable distinct_filter_type = view.ToTable(true, "filter_type");
        DataTable distinct_filter_thickness = view.ToTable(true, "filter_thickness");

        Distinct_filter_main = distinct_filter_main;
        Distinct_filter_groupfunction = distinct_filter_groupfunction;
        Distinct_filter_form = distinct_filter_form;
        Distinct_filter_type = distinct_filter_type;
        Distinct_filter_thickness = distinct_filter_thickness;


    }
    public ObservableCollection<MainFilterCheckedListClass> MainCheckedListBox()
    {
        MainList = new ObservableCollection<MainFilterCheckedListClass>();
        foreach (DataRow dr in Distinct_filter_main.Rows)
        {
            MainList.Add(new MainFilterCheckedListClass { MainIsSelected = false, MainText = dr["filter_main"].ToString() }); ;
        }

        return MainList;
    }
    public ObservableCollection<GroupFunctionCheckedListClass> GroupFunctionCheckedListBox()
    {
        GroupFunctionList = new ObservableCollection<GroupFunctionCheckedListClass>();
        foreach (DataRow dr in Distinct_filter_groupfunction.Rows)
        {
            GroupFunctionList.Add(new GroupFunctionCheckedListClass { GroupFunctionIsSelected = false, GroupFunctionText = dr["filter_groupfunction"].ToString() }); ;
        }

        return GroupFunctionList;
    }
    public ObservableCollection<FormCheckedListClass> FormCheckedListBox()
    {
        FormList = new ObservableCollection<FormCheckedListClass>();
        foreach (DataRow dr in Distinct_filter_form.Rows)
        {
            FormList.Add(new FormCheckedListClass { FormIsSelected = false, FormText = dr["filter_form"].ToString() }); ;
        }

        return FormList;
    }
    public ObservableCollection<TypeFilterCheckedListClass> TypeCheckedListBox()
    {
        TypeList = new ObservableCollection<TypeFilterCheckedListClass>();
        foreach (DataRow dr in Distinct_filter_type.Rows)
        {
            TypeList.Add(new TypeFilterCheckedListClass { TypeIsSelected = false, TypeText = dr["filter_type"].ToString() }); ;
        }

        return TypeList;
    }
    public ObservableCollection<ThicknessFilterCheckedListClass> ThicknessCheckedListBox()
    {
        ThicknessList = new ObservableCollection<ThicknessFilterCheckedListClass>();
        foreach (DataRow dr in Distinct_filter_thickness.Rows)
        {
            ThicknessList.Add(new ThicknessFilterCheckedListClass { ThicknessIsSelected = false, ThicknessText = dr["filter_thickness"].ToString() }); ;
        }

        return ThicknessList;
    }
}

下面是我的 XAML 列表框代码：

<Label Content="Main Filter" Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="2"/>
    <ListBox Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="4" ItemsSource="{Binding MainList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox IsChecked="{Binding MainIsSelected}" Content="{Binding MainText}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
    
    <Label Content="Group/Function Filter" Grid.Row="4" Grid.Column="1" Grid.ColumnSpan="2"/>
    <ListBox Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="5" ItemsSource="{Binding GroupFunctionList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox IsChecked="{Binding GroupFunctionIsSelected}" Content="{Binding GroupFunctionText}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
    
    <Label Content="Form Filter" Grid.Row="6" Grid.Column="1" Grid.ColumnSpan="2"/>
    <ListBox Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="7" ItemsSource="{Binding FormList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox IsChecked="{Binding FormIsSelected}" Content="{Binding FormText}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
    
    <Label Content="Type Filter" Grid.Row="8" Grid.Column="1" Grid.ColumnSpan="2"/>
    <ListBox Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="9" ItemsSource="{Binding TypeList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox IsChecked="{Binding TypeIsSelected}" Content="{Binding TypeText}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
    
    <Label Content="Thickness Filter" Grid.Row="10" Grid.Column="1" Grid.ColumnSpan="2"/>
    <ListBox Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="11" ItemsSource="{Binding ThicknessList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <CheckBox IsChecked="{Binding ThicknessIsSelected}" Content="{Binding ThicknessText}"/>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

下面是我的表单代码，我在其中创建了 CheckedBoxLists class 的实例，并认为它会自动绑定到 class 中的对象，但它没有。

public Form1(DataTable productMatrix)
    {
        InitializeComponent();

        Classes.CheckedBoxLists checkedBoxLists = new Classes.CheckedBoxLists();

        checkedBoxLists.LoadFilters(productMatrix);
    }

我能想到的解决这个问题的唯一方法是将 x:Name 属性添加到每个 ListBox 并在表单 class 中执行 ListBoxName.DataContext = checkedBoxLists.MainCheckedListBox() 作为 class 中的方法应该 return Observable Collection - 这是正确的方法还是我不应该这样做？

Answer 1

我认为您只需要将 Form1 的 DataContext 设置为 CheckdBoxLists 的实例即可。

public Form1(DataTable productMatrix)
{
    InitializeComponent();

    Classes.CheckedBoxLists checkedBoxLists = new Classes.CheckedBoxLists();

    checkedBoxLists.LoadFilters(productMatrix);
    this.DataContext = checkedBoxLists;
}

查看您的 CheckedBoxLists class 您还可以考虑使用更全面的 MVVM-UI architecture

将 WPF 控件绑定到 class 中的对象，单独形成 class

Binding WPF control to objects within a class separate to form class

c#

data-binding

wpf