Autocomplete 填充xlabs自动完成视图的建议列表

我在填充和显示XLabs.Forms.Control的建议列表时遇到困难：AutoCompleteView。我已经将ViewModel中的observable集合绑定到autocompleteview xaml的Suggestions属性

根据我的调试代码（即，只是一个将查询返回的内容写入调试输出的循环），我的查询返回的是项，因此我认为问题在于只显示所述项

下面是Xaml和ViewModel的代码（Store类有一个StoreName属性/字段）

XAML

<ContentPage.Resources>
        <ResourceDictionary>
            <DataTemplate x:Key="SugestionItemTemplate">
                    <ViewCell Height="60">
                            <ViewCell.View>
                                <StackLayout VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
                                        <Label Text="{Binding StoreName}" VerticalOptions="Center" HorizontalOptions="Start" />
                                </StackLayout>
                            </ViewCell.View>
                        </ViewCell>
            </DataTemplate>
        </ResourceDictionary>
    </ContentPage.Resources>
  <StackLayout HorizontalOptions="Center" Spacing="10">
    <StackLayout.BindingContext>
      <vm:CreateSaleViewModel />
    </StackLayout.BindingContext>
    <Label Text="Store" />
    <controls:AutoCompleteView Placeholder="Type a store"
                               SuggestionItemDataTemplate="{StaticResource SugestionItemTemplate}"
                               Text="{Binding StoreQuery}"
                               ShowSearchButton="True"
                               SearchBackgroundColor = "White"
                               SearchCommand ="{Binding SearchCmd}" 
                               Suggestions="{Binding StoreSuggestions}" />
  </StackLayout>

<controls:AutoCompleteView
        x:Name="MyAutoComplete"
                        SuggestionItemDataTemplate="{StaticResource SuggestionItemTemplate}"
                        Placeholder="Type Product Here"
                        ShowSearchButton="True"
                        SearchBackgroundColor="White"
                        SearchTextColor = "Black"
                        SearchBorderColor = "Yellow"
                        SuggestionBackgroundColor="White"
                        SearchCommand="{Binding SearchCommand}"
                        Suggestions="{Binding Items, Mode=TwoWay}"
                        SelectedItem ="{Binding SelectedItem}"
                        SelectedCommand = "{Binding CellSelectedCommand}"/>

视图模型

 class CreateSaleViewModel
    {
        // Query Variables
        public string StoreQuery { get; set; }

        // Query Suggestions
        public ObservableCollection<Store> StoreSuggestions { get; private set; }

        public ICommand SearchCmd { get; set; }

        public CreateSaleViewModel()
        {
            SearchCmd = new Command(Search);
        }

        private async void Search()
        {
            StoreSuggestions = await App.AzureDataStore.SearchStoresAsync(StoreQuery);
        }
    }

class CreateSaleViewModel
{
//查询变量
公共字符串存储查询{get；set；}
//查询建议
public observeCollection存储建议{get；private set；}
公共ICommand SearchCmd{get；set；}
公共CreateSaleViewModel（）
{
SearchCmd=新命令（搜索）；
}
专用异步无效搜索（）
{
StoreSuggestions=wait App.AzureDataStore.SearchStoresSync（StoreQuery）；
}
}

我刚刚遇到了同样的事情。我完全忽略了Search命令，并挂接到代码隐藏中的AutoCompleteView TextChanged事件，从而解决了这个问题

XAML

<ContentPage.Resources>
        <ResourceDictionary>
            <DataTemplate x:Key="SugestionItemTemplate">
                    <ViewCell Height="60">
                            <ViewCell.View>
                                <StackLayout VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
                                        <Label Text="{Binding StoreName}" VerticalOptions="Center" HorizontalOptions="Start" />
                                </StackLayout>
                            </ViewCell.View>
                        </ViewCell>
            </DataTemplate>
        </ResourceDictionary>
    </ContentPage.Resources>
  <StackLayout HorizontalOptions="Center" Spacing="10">
    <StackLayout.BindingContext>
      <vm:CreateSaleViewModel />
    </StackLayout.BindingContext>
    <Label Text="Store" />
    <controls:AutoCompleteView Placeholder="Type a store"
                               SuggestionItemDataTemplate="{StaticResource SugestionItemTemplate}"
                               Text="{Binding StoreQuery}"
                               ShowSearchButton="True"
                               SearchBackgroundColor = "White"
                               SearchCommand ="{Binding SearchCmd}" 
                               Suggestions="{Binding StoreSuggestions}" />
  </StackLayout>

<controls:AutoCompleteView
        x:Name="MyAutoComplete"
                        SuggestionItemDataTemplate="{StaticResource SuggestionItemTemplate}"
                        Placeholder="Type Product Here"
                        ShowSearchButton="True"
                        SearchBackgroundColor="White"
                        SearchTextColor = "Black"
                        SearchBorderColor = "Yellow"
                        SuggestionBackgroundColor="White"
                        SearchCommand="{Binding SearchCommand}"
                        Suggestions="{Binding Items, Mode=TwoWay}"
                        SelectedItem ="{Binding SelectedItem}"
                        SelectedCommand = "{Binding CellSelectedCommand}"/>

查看模型搜索图标命令 什么都不做

public Command<string> SearchCommand
    {
        get
        {
            return _searchCommand ?? (_searchCommand = new Command<string>(
                obj =>{},
                obj => !string.IsNullOrEmpty(obj.ToString())));
        }
    }

public命令SearchCommand
{
得到
{
返回\u searchCommand？？？（\u searchCommand=new命令(
obj=>{}，
obj=>！string.IsNullOrEmpty（obj.ToString（））；
}
}

ViewModel LoadProducts 在网络调用后更新ObservableCollection

public async Task LoadProducts(string term)
    {
        var items = await service.GetProducts(term);
        Items=new ObservableCollection<string>(items);
        OnPropertyChanged("Items");

    }

公共异步任务LoadProducts（字符串术语）
{
var项目=等待服务。获取产品（期限）；
项目=新的可观测集合（项目）；
不动产变更（“项目”）；
}

您找到解决方案了吗？我也在寻找解决办法。thanksI刚刚认识到这里缺少Suggestions=“{Binding StoreSuggestions}”/>Mode=Twoway。应该是这样的，Suggestions=“{Binding StoreSuggestions，Mode=TwoWay}”还没有尝试Michael Davis的答案。我们的团队决定使用一种不同的技术，而不是xamarin.forms。您知道为什么SearchCommand不会触发而不是textchange事件吗？这是干什么的？