How to set value of WPF ComboBox Item from C# Code

Question

I am populating my WPF ComboBox like this

foreach (Function fx in XEGFunctions.GetAll())
{
    ComboBoxItem item = new ComboBoxItem();
    item.Content = fx.Name;
    item.ToolTip = fx.Signature;               
    //item.( some property ) = fx.FunctionValue;
    cmbBoxTransformation.Items.Add(item);
}
cmbBoxTransformation.SelectedIndex = 0;

How can I set some different value to each ComboBoxItem.

Developer · Accepted Answer · 2012-05-21 05:25:07Z

5

If the value you're looking to set is only used in the back end, and not displayed to the user, the Tag property is probably your best bet.

item.Tag = fx.FunctionValue;

answered May 21, 2012 at 5:25

Developer

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3 Comments

Abhi Over a year ago

But If I am having value with me I want to show corresponding Item selected at runtime whose value is this (some text) then i think it will not work

Developer Over a year ago

You can use a linq query to find it pretty quickly, I'm not entirely clear as to what you're trying to do from your question though

Abhi Over a year ago

Ok it's good I will iterate through a LINQ query to select a particualar Item whose value I m having at runtime

Tilak · Accepted Answer · 2012-05-21 05:27:32Z

2

Two options

You can create derived type from ComboBoxItem, and define properties in derived type.
You can create arbitrary collection of item (with your custom properties), and set ComboBox.ItemsSource to that collection, and DisplayMemberPath to the field that needs to be displayed in the Combobox.

Binding combobox to display source and binding source

How SelectedValue and DisplayMemberPath saved my life

answered May 21, 2012 at 5:27

Tilak

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Comments

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

this little tick may helps someone

<ComboBox SelectedIndex="1" SelectedValuePath="Tag"  SelectedValue="{Binding SampleDept,Mode=OneWayToSource}" >
                                <ComboBoxItem Content="8-bit" Tag="8"  ></ComboBoxItem>
                                <ComboBoxItem Content="16-bit" Tag="16" ></ComboBoxItem>
                                <ComboBoxItem Content="24-bit" Tag="24"></ComboBoxItem>
                                <ComboBoxItem Content="32-bit" Tag="32"></ComboBoxItem>
                            </ComboBox>

public class SampleModel{

   public int SampleDept{

            get { return _sampleDept; }
            set {
                
                _sampleDept = value;
            OnPropertyChanged("SampleDept");
            }
        }
}

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 10, 2014 at 15:45

zamoldar

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Comments

Mahdi Khalili · Accepted Answer · 2018-06-10 10:51:08Z

0

var listItems = val.Split('$');
DataTemplate dt = new DataTemplate();
var combo = new FrameworkElementFactory(typeof(ComboBox));
combo.SetValue(ComboBox.ItemsSourceProperty, listItems);
combo.SetValue(ComboBox.SelectedValueProperty, "Whatever");
combo.SetBinding(ComboBox.SelectedValueProperty, new Binding("Value") { Source = mkvc });
dt.VisualTree = combo;
dt.Seal();

add this to editor template of whatever you want to add combobox to it => mkvc is a class for holding my data

PropertyDefinition pd = new PropertyDefinition();
pd.EditorTemplate = dt;
//rpg =>radPropertyGrid
rpg.PropertyDefinitions.Add(pd);
rpg.Item = propertyList;

propertylist is list of myclass

edited Jun 10, 2018 at 10:51

answered Jun 10, 2018 at 10:45

Mahdi Khalili

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