基于使用XAML的另一个ComboBox填充ComboBox [英] Populate ComboBox based on another ComboBox using XAML

问题描述

我有两个ComboBox

I have two ComboBoxes

<ComboBox Name="cmbMake" DisplayMemberPath="MakeName" SelectedValuePath="MakeID"/>
<ComboBox Name="cmbModel" DisplayMemberPath="ModelName"/>

我使用LINQ到实体填充 cmbGroup ComboBox

I use LINQ-to-Entities to populate the cmbGroup ComboBox

Dim db as myDataEntity
cmbGroup.ItemsSource = db.Makes

根据第一个ComboBox的选择（ cmbMake ）填充第二个ComboBox（ cmbModels ） ）使用XAML，以便我在第一个ComboBox中选择的任何一个都将自动过滤第二个ComboBox中的ItemsSource？

How do I populate my second ComboBox (cmbModels) based on the selection of the first ComboBox (cmbMake) using XAML so that whatever I select in the first ComboBox automatically filters the ItemsSource in the second ComboBox?

这是否可以？

推荐答案

我在这里发布完整的解决方案

I am posting the full solution here

<ComboBox Name="cmbMake" DisplayMemberPath="MakeName" SelectedValuePath="MakeID"  Width="200"/>
<ComboBox Name="cmbModel" DisplayMemberPath="ModelName" DataContext="{Binding SelectedItem, ElementName=cmbMake}" Width="200"/>

CODE-BEHIND

CODE-BEHIND

Private Sub cmbMake_SelectionChanged(ByVal sender As System.Object, ByVal e As System.Windows.Controls.SelectionChangedEventArgs) Handles cmbMake.SelectionChanged

        Dim myItem = From m In myModel
                     Where m.MakeID = cmbMake.SelectedValue

        cmbModel.ItemsSource = myItem

End Sub

只要cmbModel ComboBox中的值发生变化，它将使用LINQ重置cmbModel ComboBox的 ItemsSource 。

Whenever the value is changed in the cmbModel ComboBox it will use LINQ to reset the ItemsSource of the cmbModel ComboBox.

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