Set Selected Item of WPF Combobox to User Setting

问题

I have a combo box with an item source set as a collection of 'Category'. The SelectedValuePath is the CategoryID property. I have a user setting 'DefaultCategory' that is an integer of which should set the CategoryID. I want the combo box to have a selection of the DefaultCategory user setting.

xmlns:my="clr-namespace:MyApp"

<ComboBox x:Name="cmbCategory" DisplayMemberPath="Category" SelectedValuePath="CategoryID" SelectedValue="{Binding Source={x:Static my:MySettings.Default}, Path=DefaultCategory, Mode=TwoWay}"/>

回答1:

You could create an additional application setting called DefaultCategory_Selected of type int and scope of User, and then binding the SelectedIndex property to the setting.

<ComboBox SelectedIndex="{Binding Path=DefaultCategory_Selected, Mode=TwoWay}" ... />

来源：https://stackoverflow.com/questions/4946167/set-selected-item-of-wpf-combobox-to-user-setting