wpf C#.net中的组合框面临的问题 [英] Facing Problem with combobox in wpf C#.NET

问题描述

在组合框的选择更改事件中使用ComboboxName.SelectedItem代码时，i将获得先前选择的值.我用数据表绑定了组合框.

<ComboBox x:Name="ActieComboBox" Grid.Column="1" Grid.Row="4" Margin="2" ItemsSource="{Binding Source={StaticResource ProjectTaakCategorieViewSource}}" ItemTemplate="{StaticResource ProjectTakenComboBoxItemTemplate}" SelectedValuePath="TaakCategorieId" SelectedValue="{Binding CategorieId,Mode=TwoWay}" />

重要的是，selectedValue使用双向绑定

i gets previously selected value when using ComboboxName.SelectedItem code in selection changed events of the combobox. i used datatable to bind combobox.

解决方案

Since this question is rather vague I''ll post an example combobox of mine :

<ComboBox x:Name="ActieComboBox" Grid.Column="1" Grid.Row="4" Margin="2" ItemsSource="{Binding Source={StaticResource ProjectTaakCategorieViewSource}}" ItemTemplate="{StaticResource ProjectTakenComboBoxItemTemplate}" SelectedValuePath="TaakCategorieId" SelectedValue="{Binding CategorieId,Mode=TwoWay}" />

Important stuff is that the selectedValue uses twoway binding

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