组合框数据绑定

Question

I'm having a problem with a combobox. I use databinding to display the content of a list (guinodes). My UINode items in the list implement INotifyPropertyChanged and raise PropertyChanged on name changes. If I change the name of an item the combobox is updated, however combobox.Text remains the old value. Also please note that combobox.SelectedValue.ToString() contains only the type.

Databinding looks like that :

ItemsSource="{Binding ElementName=graphCanvas, Path=guinodes}"

Answer 1

your combobox SelectedValue or SelectedItem should be the selected UINode item, just take it and get the information you want from it. dont know why you use combobox.Text?

Answer 2

use this:

 <ComboBox x:Name="SubCategory"  ItemsSource="{Binding ElementName=graphCanvas, Path=guinodes}" DisplayMemberPath="SubCategoryName" SelectedValuePath="**SubCategoryID**" SelectedValue="{Binding SubCategoryID,ValidatesOnDataErrors=True,UpdateSourceTrigger=PropertyChanged}"  />

Good Luck