WPF Combobox binding with List<string>

Question

I have two properties, one which is a list of string and the other 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 a Combobox defined in XAML as such

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

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

When the user selects one or the other, I want to set SimpleStringProperty with that value. However, the 'value' im getting back from the combobox through the two way binding is not the selectedItem, but the List<String>. How can I do this right? I'm fairly new to wpf, so please excuse the amateurism.

Chris · Accepted Answer · 2015-01-21 20:40:21Z

29

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

That's untested, but it should at least be pretty close to what you need.

edited Jan 21, 2015 at 20:40

answered Feb 20, 2014 at 4:27

Chris

1,0018 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

d.moncada · Accepted Answer · 2014-02-20 04:27:04Z

4

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

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

answered Feb 20, 2014 at 4:27

d.moncada

17.5k5 gold badges56 silver badges82 bronze badges

Comments

MHN · Accepted Answer · 2019-07-15 21:42:40Z

3

What helped me:

Using SelectedItem
Adding UpdateSourceTrigger=PropertyChanged
IsSynchronizedWithCurrentItem="True" to be sure Selected item always synchronized with actual value
Mode=TwoWay if you need to update as from source as from GUI

So at the end best way, if source is

List<string>

Example:

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

Additional Info

Difference between SelectedValue and SelectedItem:
1. https://stackoverflow.com/a/4902454/2758833
2. https://stackoverflow.com/a/2883923/2758833
SelectedValuePath Documentation:
1. https://learn.microsoft.com/en-us/dotnet/api/system.windows.controls.primitives.selector.selectedvaluepath
SelectedValue updates possible bugs for .NET 4 and .NET 4.5:
1. https://stackoverflow.com/a/247482/2758833

edited Jul 15, 2019 at 21:42

MHN

1344 silver badges9 bronze badges

answered Jun 16, 2016 at 1:32

Ony

4297 silver badges18 bronze badges

3 Comments

15ee8f99-57ff-4f92-890c-b56153 Over a year ago

I recommend reading the documentation on ComboBox.SelectedValue instead of just guessing about it.

15ee8f99-57ff-4f92-890c-b56153 Over a year ago

Here's the documentation. HTH.

Jon Barker Over a year ago

This worked for me, i was missing: UpdateSourceTrigger=PropertyChanged

Collectives™ on Stack Overflow

WPF Combobox binding with List<string>

3 Answers 3

Comments

Comments

3 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related