未检测到已安装的组件元素已经是另一个元素的子元素加载 SearchBox 时出现 UWP 错误

如何解决未检测到已安装的组件元素已经是另一个元素的子元素加载 SearchBox 时出现 UWP 错误

我在加载 SearchBox 时遇到此间歇性错误，但不确定我在这里做错了什么。项目已从 Windows 8.1 应用平台迁移到 UWP。

未检测到已安装的组件。元素已经是 另一个元素。

我在 App.g.i.cs 中收到此错误。任何 CS 文件中都没有抛出异常。

这是代码。页面中有两个 SearchBox 元素，我想知道这是否可能是问题所在。

                <TextBlock 
                    Visibility="{
                        Binding ServiceReview.ServiceReviewType_Id,Converter={StaticResource ConsumerTypetoVisibleConverter},Mode=OneWay
                    }"
                    Style="{StaticResource FormTextBlock}"
                    Text="Individual's Name"/>
                <SearchBox 
                    Visibility="{
                        Binding ServiceReview.ServiceReviewType_Id,Mode=OneWay
                    }"
                    x:Name="IndividualSearchBox"
                    Style="{StaticResource FormSearchBox}"
                    PlaceholderText="Search by Individual's Name"
                    SuggestionsRequested="IndividualSearchBox_OnSuggestionsRequested"
                    ResultSuggestionChosen="IndividualSearchBox_OnResultSuggestionChosen"
                    SearchHistoryEnabled="False">
                </SearchBox>
 
                    <TextBlock
                                Style="{StaticResource FormTextBlock}"
                                Text="Search Team Members To Add"/>
                    <SearchBox
                                x:Name="UserSearchBox"
                                Style="{StaticResource FormSearchBox}"
                                PlaceholderText="Search by Team Member's Name"
                                SuggestionsRequested="UserSearchBox_OnSuggestionsRequested"
                                ResultSuggestionChosen="UserSearchBox_OnResultSuggestionChosen"
                        SearchHistoryEnabled="False">
                    </SearchBox>

用户搜索框给出了错误。

我们像这样加载数据：

 private async void UserSearchBox_OnSuggestionsRequested(SearchBox sender,SearchBoxSuggestionsRequestedEventArgs args)
    {
        try
        {

       
        if (string.IsNullOrEmpty(args.QueryText))
        {
            return;
        }

        var collection = args.Request.SearchSuggestionCollection;

        if (_oldUserQuery == args.QueryText) return;

        var deferral = args.Request.GetDeferral();

        List<Employee> employees = await _employeeService.SearchEmployees(args.QueryText);

        foreach (var employee in employees)
        {
            collection.AppendResultSuggestion(employee.FullName,string.Empty,employee.EmployeeId.ToString(),RandomAccessstreamReference.CreateFromUri(
                new Uri("http://www.dotnettoscana.org/logo.png")),string.Empty);
        }

        deferral.Complete();

        _oldUserQuery = args.QueryText;
        }
        catch (Exception ex)            {

            throw;
        }
    }

这里是与控件相关的样式。

<Style targettype="SearchBox" x:Key="FormSearchBox">
        <Setter Property="Height" Value="55"/>
        <!--<Setter Property="SearchHistoryEnabled" Value="False"/>-->
        <Setter Property="Margin" Value="20,15"/>
        <Setter Property="HorizontalAlignment" Value="Left"/>
        <Setter Property="Width" Value="380" />
        <!--Testing by moving below contents from SearchBox-->
        <Setter Property="VerticalAlignment" Value="Top"/>
        <Setter Property="Padding" Value="{StaticResource MediumThickness}"/>
        <Setter Property="BorderBrush" Value="{StaticResource BorderBrushColor}"/>
        <Setter Property="BorderThickness" Value="{StaticResource BorderThickness}"/>
        <Setter Property="FontSize" Value="{StaticResource AppFontSize}"/>
    </Style>

任何有关发现问题的指示将不胜感激。