Setting a textbox based on listbox selection.

jhoga

This should be easy but I can't get to work. I just want to set the value of a textbox when the select value in a list box changes. Here's how it works in a combobox. Category.Text = ComboBox1.Text How does it work in a list box in vb.2010 (WPF)? :confused:

Abhinav S

Have a look here. The equivalent of Category.Text = ComboBox1.Text is a little different in WPF. You need to link the CurrentItem of a listbox to your textbox. The link above might give you a better idea.

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jhoga

Thats good info, but I really do not want to databind that textbox. I'm binding back to SQl already I just want to give the user an easy way to populate/change the field value. The combo works, but a list box looks much better. I'm making it visilble from a click event. Thanhks for the info.

Jurgen Rohr

Hi, you must convert the SelectedItem of the ListBox into the string you need. You can do this by binding it to another property (of your viewmodel) and in the new property's setter, you can transfer the converted string-value to your TextBox.Text-property. Alternatively you must code the SelectionChanged-event of the ListBox. The type of the SelectedItem depends on the given Items (sounds a bit stupid, I know). If you fill the ListBox at designtime, you will probably have something like

In this case, the SelectedItem is of type ListBoxItem. If you e. g. provide a List<string> as ItemsSource, you get a string as SelectedItem. As mentioned by Abhinav S you might want to consider using the IsSynchronizedWithCurrentItem property. Cheers Jürgen