如何通过ObjectDataProvider将ComboBox绑定到通用字典 [英] How to bind a ComboBox to generic dictionary via ObjectDataProvider

问题描述

我想填写一个带有代码背后的键/值数据的ComboBox，我有这样的：

XAML：

 < Window x：Class =TestCombo234.Window1
 xmlns =http://schemas.microsoft.com/winfx / 2006 / xaml / presentation
 xmlns：x =http://schemas.microsoft.com/winfx/2006/xaml
 xmlns：local =clr-namespace：TestCombo234
 Title =Window1Height =300Width =300> 
< Window.Resources> 
< ObjectDataProvider x：Key =ChoicesObjectType ={x：Type local：CollectionData}MethodName =GetChoices/> 
< /Window.Resources> 
< StackPanel Horizo​​ntalAlignment =Left> 
< ComboBox ItemsSource ={Binding Source = {StaticResource Choices}}/> 
< / StackPanel> 
< / Window> 
  

代码背后：

 使用System.Windows; 
使用System.Collections.Generic; 
 
命名空间TestCombo234 
 {
 public partial class Window1：Window 
 {
 public Window1（）
 {
 InitializeComponent（） ; 
} 
} 
 
 public static class CollectionData 
 {
 public static Dictionary< int，string> GetChoices（）
 {
字典< int，string> choices = new Dictionary< int，string>（）; 
 choices.Add（1，monthly）; 
 choices.Add（2，quarterly）; 
 choices.Add（3，每半年）; 
 choices.Add（4，yearly）; 
返回选项; 
} 
} 
} 
  

但这给了我这个：

alt text http://img193.imageshack.us /img193/9218/choices.png

我需要更改什么，以便键是int，值是字符串？

解决方案

到您的ComboBox添加

  SelectedValuePath =KeyDisplayMemberPath =Value
  

I want to fill a ComboBox with key/value data in code behind, I have this:

XAML:

<Window x:Class="TestCombo234.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:TestCombo234"
    Title="Window1" Height="300" Width="300">
    <Window.Resources>
        <ObjectDataProvider x:Key="Choices" ObjectType="{x:Type local:CollectionData}" MethodName="GetChoices"/>
    </Window.Resources>
    <StackPanel HorizontalAlignment="Left">
        <ComboBox ItemsSource="{Binding Source={StaticResource Choices}}"/>
    </StackPanel>
</Window>

Code Behind:

using System.Windows;
using System.Collections.Generic;

namespace TestCombo234
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
    }

    public static class CollectionData
    {
        public static Dictionary<int, string> GetChoices()
        {
            Dictionary<int, string> choices = new Dictionary<int, string>();
            choices.Add(1, "monthly");
            choices.Add(2, "quarterly");
            choices.Add(3, "biannually");
            choices.Add(4, "yearly");
            return choices;
        }
    }
}

But this gives me this:

alt text http://img193.imageshack.us/img193/9218/choices.png

What do I have to change so that the key is the int and the value is the string?

解决方案

To your ComboBox add

SelectedValuePath="Key" DisplayMemberPath="Value"

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