WPF绑定:无法解析静态资源

Question

我试图运行这个例子,但我遇到了绑定问题.

Designer会突出显示错误 The resource "monthCollection" could not be resolved

如何使用Utility.MonthCollection作为本地资源？

XAML部分:

<Window x:Class="FaceReport.WindowMain"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Rapor" Height="402" Width="600" WindowState="Normal">
<Grid Name="gridMain" x:Uid="uidGridMain">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <ComboBox SelectedIndex="0" 
              DisplayMemberPath="Value" SelectedValuePath="Key" Margin="132,9,200,0"
              Grid.Row="3" Height="24" VerticalAlignment="Top" Name="cbBind" 

              ItemsSource="{Binding Source={StaticResource Utility.ReportForCollection},
                Path=Utility.ReportForCollection}"                   
              />
 </Grid>
 </Window>

C#部分:

namespace FaceReport
{
internal class Utility
{
    public enum ReportFor
    {
        Choose,
        All,
        Group,
        Person
    }

    private static Dictionary<ReportFor, string> _dictReportFor;
    public static Dictionary<ReportFor, string> ReportForCollection
    {
        get
        {
            return _dictReportFor;
        }
    }

    static Utility()
    {
        //initialize the collection with user friendly strings for each enum
        _dictReportFor = new Dictionary<ReportFor, string>(){
            {ReportFor.Choose, "Lütfen seçiniz..."},        
            {ReportFor.All, "Herkes"},
            {ReportFor.Group, "Grup"},
            {ReportFor.Person, "?ah?s"}};
    }
}

/// <summary>
/// Application's main form
/// </summary>
public partial class WindowMain : Window
{
    /// <summary>
    /// Constructor
    /// </summary>
    public WindowMain()
    {
        InitializeComponent();
    }
}

Answer 1

你错过了这一点:

- >此Utility类可以实例化为资源< - 然后在ComboBox创建中引用.

它看起来像这样:

<Application.Resources>
    <local:Utility x:Key="monthCollection"/>
</Application.Resources>

这一位:{Binding Source={StaticResource monthCollection}, Path=MonthCollection 说找到静态资源monthCollection并在其上使用该属性,MonthCollection因此您首先必须实例化具有`MonthCollection作为属性的对象,然后引用该静态资源.

您可能还需要在文件顶部添加类似这样的语句:

xmlns:local="clr-namespace:YourNamespaceHere"

未经测试的代码如下:

<Window x:Class="FaceReport.WindowMain"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:FaceReport"

 Title="Rapor" Height="402" Width="600" WindowState="Normal">

<Application.Resources>
    <local:Utility x:Key="reportCollection"/>
</Application.Resources>

 <Grid Name="gridMain" x:Uid="uidGridMain">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <ComboBox SelectedIndex="0" DisplayMemberPath="Value" SelectedValuePath="Key"  Margin="132,9,200,0" Grid.Row="3" Height="24" VerticalAlignment="Top" Name="cbBind" 
     ItemsSource="{Binding Source={StaticResource reportCollection}, Path=ReportForCollection}" />
 </Grid>
</Window>