当错误WPF组合框的ItemsSource绑定到字符串数组 [英] Error when binding WPF combobox ItemsSource to an Array of Strings

问题描述

我不能设置一个组合框的的ItemsSource为数组。我曾尝试在DataContext设置为此处数组中发现的类，然后设置在XAML绑定

I could not set a combobox's ItemsSource to an Array. I have tried setting the DataContext to the class where the Array is found, and then setting the bindings in XAML

 class Car
{
    public string[] makes;
}

...

public MainWindow()
{
    Car _Car = new Car();
    _Car.makes = new string[]
        {
            "Toyota",
            "Mitsubishi",
            "Audi",
            "BMW"           
        };

    this.DataContext = _Car;
}

，然后在XAML

and then in XAML

<ComboBox Name="cars" Grid.Column="0" 
              Grid.Row="0" Margin="5" 
              ItemsSource="{Binding Path=makes}"/>

这似乎并没有做任何事情。我的汽车组合框不会有任何项目。

It doesn't seem to do anything. My cars combobox won't have any items.

我也试了明确分配

cars.ItemsSource= new string[]{
                "Toyota",
                "Mitsubishi",
                "Audi",
                "BMW"           
            };

但后来我收到此错误信息：

But then I get this error message:

异常已被调用的目标引发异常。

Exception has been thrown by the target of an invocation.

有什么我错过了吗？

推荐答案

WPF绑定不支持领域。使其具有getter和属性setter

WPF binding doesn't support fields. Make it a property that has a getter and setter

class Car
{
    public string[] makes { get; set; }
}

无论如何，你不必明确说明路径，所以这应该足够了。

<ComboBox Name="cars" Grid.Column="0" 
          Grid.Row="0" Margin="5" 
          ItemsSource="{Binding makes}"/>

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