Question

我有一个枚举类型的属性。我将wpf控件的内容绑定到此属性。这将显示枚举值的名称。因此调用枚举的ToString方法。

但是我需要显示值，而不是字符串值。有谁知道怎么做？

这是我的C＃代码：

public Camera cam;

private float maxWidth;

Rigidbody2D rigidbody2D;

// Use this for initialization
void Start()
{
    rigidbody2D = GetComponent<Rigidbody2D>();

    if (cam == null)
    {
        cam = Camera.main;
    }
    Vector3 upperCorner = new Vector3(Screen.width, Screen.height, 0.0f);
    Vector3 targetWidth = cam.ScreenToWorldPoint(upperCorner);
    float SantaBagWidth = GetComponent<Renderer>().bounds.extents.x;
    maxWidth = targetWidth.x - SantaBagWidth;
}


// Update is called once per frame
void FixedUpdate()
{
    Vector3 rawPosition = cam.ScreenToWorldPoint(Input.mousePosition);
    Vector3 targetPosition = new Vector3(rawPosition.x, 0.0f, 0.0f);
    float targetWidth = Mathf.Clamp(targetPosition.x, -maxWidth, maxWidth);
    targetPosition = new Vector3(targetWidth, targetPosition.y, targetPosition.z);
    rigidbody2D.MovePosition(targetPosition);
}

这是我的XAML：

public enum Animal 
{ 
   cat = 0, 
   dog = 1, 
   mouse = 2 
}

public Animal MyAnimal { get; set; } 

void SomeMethod() { MyAnimal = dog; }

Answer 1

当您绑定到一种类型的值并希望以另一种格式显示它而不是默认的ToString（）方法时，您应该使用DataTemplate或IValueConverter。由于XAML是标记语言，因此您无法将枚举值强制转换为标记中的int，因此您应该使用转换器：

public class EnumConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        animals enumValue = (animals)value;
        return System.Convert.ToInt32(enumValue);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

<Window.Resources>
    <local:EnumConverter x:Key="conv" />
</Window.Resources>
...
<ContentControl Content="{Binding TheEnumProperty, Converter={StaticResource conv}}" />

Answer 2

我找到了一个解决方案：

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    if (!(value is Enum)) return value;

    return Enum.IsDefined(value.GetType(), value) ? value : System.Convert.ToInt32(value);
}

xaml绑定到枚举。显示值而不是“ToString”

2 个答案: