Associate WPF Combobox with a <string> List

Question

I have two properties, one of which is a list of strings, and the other is just a string.

private List<String> _property; public List<String> Property get { return new List<string>(){"string1", "string2"}; } set{_property = value } public String SimpleStringProperty{get;set;} 

I also have Combobox defined in XAML as such

 <Combobox ItemsSource="{Binding Property , Mode="TwoWay"}" Text="Select Option" /> 

Now combobox correctly displays two options: "string1" and "string2"

When the user selects one or the other, I want to set SimpleStringProperty with this value. However, the "value" im returning from combobox via a two-way binding is not a select, but a List<String> . How can I do it right? I am new to wpf, so please excuse my amateurism.

Answer 1

 <Combobox ItemsSource="{Binding Property}" SelectedItem="{Binding SimpleStringProperty, Mode=TwoWay}" Text="Select Option" /> 

This is untested, but it should be at least close to what you need.

Answer 2

You need to bind the String property using the SelectedItem combobox property.

 <Combobox ItemsSource="{Binding Property}" SelectedItem="{Binding SimpleStringProperty}" IsSynchronizedWithCurrentItem="True" Text="Select Option" /> 

Answer 3

What helped me:

1. Using SelectedItem
2. Adding UpdateSourceTrigger = PropertyChanged
3. IsSynchronizedWithCurrentItem = "True" to ensure that the selected item is always in sync with the actual value
4. Mode = TwoWay, if you need to update both from the source and from the GUI

So in the end the best way is if the source

 List<string> 

Example:

  <ComboBox IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding SomeBindingPropertyList}" SelectedItem="{Binding SomeBindingPropertySelectedCurrently, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" /> 

Additional Information

• Difference between SelectedValue and SelectedItem:
  1. stack overflow
  2. stack overflow
• SelectedValuePath Documentation:
  1. https://docs.microsoft.com/en-us/dotnet/api/system.windows.controls.primitives.selector.selectedvaluepath
• SelectedValue updates possible errors for .NET 4 and .NET 4.5:
  1. stack overflow