MVVM自定义ComboBox绑定 [英] MVVM Custom ComboBox Binding

问题描述

大家好，

我的StocjkQueryView.xaml中具有以下组合框:

I have the following ComboBox in my StocjkQueryView.xaml:

<ComboBox Grid.Column="1" Grid.Row="0" ItemsSource="{Binding allActions}">
                    <ComboBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <CheckBox IsChecked="{Binding IsSelected}"
                                    Width="20" />
                                <TextBlock Text="{Binding Action}"
                       Width="100" />
                            </StackPanel>
                        </DataTemplate>
                    </ComboBox.ItemTemplate>
                </ComboBox>

我的Resources.xaml中也有以下代码:

I also have this code in my Resources.xaml:

<DataTemplate DataType="{x:Type vm:StockQueryViewModel}">
        <vw:StockQueryView />
    </DataTemplate>

然后我有一个ObservableCollection类，其中包含一个IsSelected布尔值和一个用于从服务调用进行绑定的字符串Action:

I then have an ObservableCollection class that contains an IsSelected bool and a string Action for binding from a service call:

class ObservableActions : ObservableCollection<SelectableAction>
    {
        public ObservableActions()
        {
            foreach (var item in WCF_Actions.scs.getListOfActions(false))
            {
                Add(new SelectableAction(false, item.ActionDescription));
            }
        }


    }

    class SelectableAction
    {
        public SelectableAction(bool sel, string act)
        {
            this.isSelected = sel;
            this.action = act;
        }

        private bool isSelected;
        public bool IsSelected
        {
            get { return isSelected; }
            set { isSelected = value; }
        }

        private string action;
        public string Action
        {
            get { return action; }
            set { action = value; }
        }
    }

然后，我尝试绑定到以下列表，该列表包含我希望在ComboBox中呈现的动作:

I'm then trying to bind to the following list that contains the actions I wish to present in the ComboBox:

public ObservableActions allActions = new ObservableActions();

此绑定如何/为什么不起作用?我在这里不明白什么?

How/Why is this binding not working? What am I not understanding here?

谢谢，

臂架

推荐答案

嘿臂架，

您能为您的UserControl容器发布XAML吗?如果我不得不猜测，我想说您需要使用Relative绑定将ComboBox绑定到包含它的UserControl的DataContext上. 很难猜测.

Can you please post the XAML for the container of your UserControl?  If I had to guess, I'd say you need to bind your ComboBox to the DataContext of the UserControl that contains it using a Relative binding...that said, without seeing your code it's tough to guess.

Aj

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