WPF组合框结合 [英] wpf combobox binding

问题描述

嗨我正尝试一个List＆LT结合;>到组合框

Hi I´m trying to bind a List<> to a combobox.

<ComboBox Margin="131,242,275,33" x:Name="customer" Width="194" Height="25"/>

public OfferEditPage()
    {
        InitializeComponent();
        cusmo = new CustomerViewModel();
        DataContext = this;
        Cusco = cusmo.Customer.ToList<Customer>();
        customer.ItemsSource = Cusco;
        customer.DisplayMemberPath = "name";
        customer.SelectedValuePath = "customerID";
        customer.SelectedValue = "1";
    }

我变得没有错误，但组合框总是空空的。
库斯科是我列出的财产。
我不知道什么是错与此code。
你能帮助我吗？

I become no Error but the Combobox is always empty. Cusco is the Property of my List. I have no idea whats wrong with this code. Can you help me?

问候

 public class Customer
{
    public int customerID { get; set; }
    public string name { get; set; }
    public string surname { get; set; }
    public string telnr { get; set; }
    public string email { get; set; }
    public string adress { get; set; }
}

这是客户类，这是我的模型。

this is the Customer Class which is my model.

public class CustomerViewModel
{
    private ObservableCollection<Customer> _customer;

    public ObservableCollection<Customer> Customer
    {
        get { return _customer; }
        set { _customer = value; }
    }

    public CustomerViewModel()
    {
        GetCustomerCollection();
    }

    private void GetCustomerCollection()
    {
        Customer = new ObservableCollection<Customer>(BusinessLayer.getCustomerDataSet());
    }

}

这就是视图模型。

and this is the ViewModel.

推荐答案

试着用一个实际的绑定对象设置ItemsSource属性

Try setting the ItemsSource property with an actual Binding object

XAML方法（推荐）：

XAML Method (recommended):

<ComboBox
    ItemsSource="{Binding Customer}"
    SelectedValue="{Binding someViewModelProperty}"
    DisplayMemberPath="name"
    SelectedValuePath="customerID"/>

编程方法：

Binding myBinding = new Binding("Name");
myBinding.Source = cusmo.Customer; // data source from your example

customer.DisplayMemberPath = "name";
customer.SelectedValuePath = "customerID";
customer.SetBinding(ComboBox.ItemsSourceProperty, myBinding);

此外，在您的客户属性的setter应提高PropertyChanged事件

Also, the setter on your Customer property should raise the PropertyChanged event

public ObservableCollection<Customer> Customer
{
    get { return _customer; }
    set
    {
        _customer = value;
        RaisePropertyChanged("Customer");
    }
}

如果上述方法不工作，尝试从构造函数的结合部分移动到OnLoaded重写方法。在加载页面时，它可能会重置值。

If the above does not work, try moving the binding portion from the constructor to the OnLoaded override method. When the page loads, it may be resetting your values.

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