C# 如何通过 ObjectDataProvider 将 ComboBox 绑定到通用字典
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How to bind a ComboBox to generic dictionary via ObjectDataProvider
提问by Edward Tanguay
I want to fill a ComboBox with key/value data in code behind, I have this:
我想在后面的代码中用键/值数据填充 ComboBox，我有这个：
XAML:
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:
背后的代码：
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;
}
}
}
What do I have to change so that the key is the int and the value is the string?
我必须更改什么才能使键是 int 而值是字符串？
采纳答案by Bryan Anderson
To your ComboBox add
到您的 ComboBox 添加
SelectedValuePath="Key" DisplayMemberPath="Value"
回答by Jim
There's an easier way.
有一个更简单的方法。
Convert the enumeration to a Generic.Dictionary object. For example let say you wanted a combo box with the weekday ( just convert the VB to C#)
将枚举转换为 Generic.Dictionary 对象。例如，假设您想要一个带有工作日的组合框（只需将 VB 转换为 C#）
Dim colWeekdays As New Generic.Dictionary(Of FirstDayOfWeek, String)
For intWeekday As FirstDayOfWeek = vbSunday To vbSaturday
colWeekdays.Add(intWeekday, WeekdayName(intWeekday))
Next
RadComboBox_Weekdays.ItemsSource = colWeekdays
In your XAML you only need to set the following to bind to an object:
在您的 XAML 中，您只需要设置以下内容即可绑定到一个对象：
SelectedValue="{Binding Path= StartDayNumberOfWeeek}" SelectedValuePath="Key"
DisplayMemberPath="Value" />
The code above can easily be generalized using reflection to handle any enumerations.
上面的代码可以很容易地使用反射来泛化来处理任何枚举。
hope this helps
希望这可以帮助
回答by juagicre
The way DevExpress 17.1.7handles this is setting those properties: DisplayMemberand ValueMember, in case of a dictionary it would be something like this:
DevExpress 17.1.7处理这个的方式是设置这些属性：DisplayMember并且ValueMember，如果是字典，它会是这样的：
DisplayMember="Value"
ValueMember="Key"
