Question

我有一个收藏集：

public static readonly DependencyProperty UserAutoCalculationTemplatesProperty = DependencyProperty.Register("UserAutoCalculationTemplates", typeof(ObservableCollection<AutoCalculationTemplate>), typeof(Options));
public ObservableCollection<AutoCalculationTemplate> UserAutoCalculationTemplates
{
    get => (ObservableCollection<AutoCalculationTemplate>)GetValue(UserAutoCalculationTemplatesProperty);
    set => SetValue(UserAutoCalculationTemplatesProperty, value);
}

AutoCalculationTemplate类：

public class AutoCalculationTemplate : INotifyPropertyChanged
{
    private CalculationVariants _templateType;

    public CalculationVariants TemplateType
    {
        get
        {
            return _templateType;

        }
        set
        {
            _templateType = value;
            OnPropertyChanged(new PropertyChangedEventArgs("TemplateType"));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        PropertyChanged?.Invoke(this, e);
    }
}

我的XAML。

<DataGrid ItemsSource="{Binding UserAutoCalculationTemplates, ElementName=OptionsWindow,Mode=TwoWay,NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" Name="AutoCalculaionTemplates">
                        <DataGrid.Columns>
                            <DataGridTemplateColumn Header="">
                                <DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <ComboBox
                                            x:Name="AutoCalculationTypeCombo"
                                            ItemsSource="{Binding Source={enum:Enumeration {x:Type options:CalculationVariants}}}"
                                            DisplayMemberPath="Description"
                                            SelectedValue="{Binding UserAutoCalculationTemplates.TemplateType, ElementName=OptionsWindow,Mode=TwoWay,NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}"
                                            SelectedValuePath="Value"
                                            DropDownClosed="AutoCalculationTypeCombo_OnDropDownClosed"/>
                                    </DataTemplate>
                                </DataGridTemplateColumn.CellTemplate>
                        </DataGrid.Columns>
                    </DataGrid>

组合框通过以下主题的扩展名绑定到枚举：Databinding an enum property to a ComboBox in WPF：

枚举：

public enum CalculationVariants
{
    [Description("Внутренний")]
    CalculateWithCSharp,
    [Description("Внешний скрипт")]
    CalculateWithPython,
    [Description("Общий")]
    Common
}

我希望Combobox做两件事：

在单击时显示所有可能的枚举值（它们的描述）；
显示UserAutoCalculationTemplatesProperty集合（空闲）中各项的TemplateType属性的当前值。

目前它只做第一件事，而不是第二件事，我该如何解决？

Answer 1

以下示例将ComboBox.SelectedValue绑定到您的OptionsWindow的属性：

public static readonly DependencyProperty SelectedCalculationVariantsProperty = DependencyProperty.Register(
  "SelectedCalculationVariants", 
  typeof(CalculationVariants), 
  typeof(Options));

public CalculationVariants SelectedCalculationVariants
{
    get => (CalculationVariants) GetValue(SelectedCalculationVariantsProperty);
    set => SetValue(SelectedCalculationVariantsProperty, value);
}

<DataGrid.Columns>
  <DataGridTemplateColumn Header="">
    <DataGridTemplateColumn.CellTemplate>
      <DataTemplate>
        <ComboBox x:Name="AutoCalculationTypeCombo"
                  ItemsSource="{Binding Source={enum:Enumeration {x:Type options:CalculationVariants}}}"
                  DisplayMemberPath="Description"
                  SelectedValue="{Binding SelectedCalculationVariants, ElementName=OptionsWindow, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}"
                  SelectedValuePath="Value"
                  DropDownClosed="AutoCalculationTypeCombo_OnDropDownClosed"/>
    </DataTemplate>
  </DataGridTemplateColumn.CellTemplate>
</DataGrid.Columns>

将组合框绑定到枚举和具有该枚举的类的集合

1 个答案: