CODEWITHSUNDEEP
c#wpfcombobox
Yummy275
Yummy275

Reputation: 313

WPF Combobox how to populate with list

I'm building a budget tracking app for myself as I teach myself to program and I want to have categories of things I spend my money on. I have a combobox which I would like to be populated by the contents of a List which hold the categories. How would I go about doing that?

Upvotes: 2

Views: 3596

Answers (2)

Clemens
Clemens

Reputation: 128042

You would simply assign a collection of items to the ItemsSource property:

comboBox.ItemsSource = new List<string> { "Item 1", "Item 2", "Item 3" };

See the Remarks for the ItemsControl.ItemsSource Property on MS Docs:

Content Model: This property may be used to add items to an ItemsControl.

A common scenario is to use an ItemsControl such as a ListBox, ListView, or TreeView to display a data collection, or to bind an ItemsControl to a collection object. To bind an ItemsControl to a collection object, use the ItemsSource property. Note that the ItemsSource property supports OneWay binding by default.

When the ItemsSource property is set, the Items collection is made read-only and fixed-size.

To my understanding, the Items property mainly exists as a default collection where items are added when you assign them directly in XAML. ItemsControls are attributed with

[System.Windows.Markup.ContentProperty("Items")]

to support XAML like this:

<ComboBox>
    <sys:String>Item 1</sys:String>
    <sys:String>Item 2</sys:String>
    <sys:String>Item 3</sys:String>
</ComboBox>

Upvotes: 3

Matěj Št&#225;gl
Matěj Št&#225;gl

Reputation: 1037

To populate a combobox with contents of a list one needs to add each item of that list into items of the combobox.

A minimal example, assuming you have a comboBox1 defined: 

        List<string> myList = new List<string> { "item1", "item2", "item3" };
        myList.ForEach(x => { comboBox1.Items.Add(x); });

Upvotes: 1

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