Display certain variable of each object into a Combobox

问题

Quick question..

I have a List of objects of this class:

public class Whatever
{
    public string Name { get; set; }
    public List<blaBla> m_blaBla { get; set; }
    // ..
}

And I want to link the List<Whatever> to a ComboxBox, where the user sees the Name of each Whatever object. How can I do that?

回答1:

You could either use ComboBox.ItemTemplate like this:

C#:

List<Whatever> lst = new List<Whatever>();
public MainWindow()
{
    InitializeComponent();
    cmb.ItemsSource = lst;
}

XAML:

<ComboBox Name="cmb">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Name}" />
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

Or use DisplayMemberPath:

<ComboBox Name="cmb" DisplayMemberPath="Name">            
</ComboBox>

回答2:

Or just override the ToString() function and it will do the job for you:

public class Whatever
{
    public string Name { get; set; }
    public List<blaBla> m_blaBla { get; set; }
    // ..
    public override string ToString()
    {
       return Name;
    }
}

And then:

List<Whatever> MyList = new List<Whatever>();
public MainWindow()
{
    InitializeComponent();
    MyComboBox.ItemsSource = MyList;
}

回答3:

Create a Viewmodel:

public ObservableCollection<Whatever> WhCol
{
    get { return this.Name; }
    set { }
}

And then a Matching View

<ComboBox DisplayMemberPath="Name" ItemsSource="{Binding WhCol}" />

According to Model-View-Modelview Pattern

This is more suited if you wan't to make changes based on user input. (Which is kinda rare for a combobox).

来源：https://stackoverflow.com/questions/37752103/display-certain-variable-of-each-object-into-a-combobox

标签

wpf

combobox