如何枚举控件的所有依赖属性?

时间:2011-01-25 13:30:42

标签: wpf dependency-properties

我有一些WPF控件。例如,TextBox。如何枚举该控件的所有依赖属性(如XAML编辑器那样)?

5 个答案:

答案 0 :(得分:9)

public IList<DependencyProperty> GetAttachedProperties(DependencyObject obj)
{
    List<DependencyProperty> result = new List<DependencyProperty>();

    foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(obj,
        new Attribute[] { new PropertyFilterAttribute(PropertyFilterOptions.All) }))
    {
        DependencyPropertyDescriptor dpd =
            DependencyPropertyDescriptor.FromProperty(pd);

        if (dpd != null)
        {
            result.Add(dpd.DependencyProperty);
        }
    }

    return result;
}

在此处找到:http://social.msdn.microsoft.com/Forums/en/wpf/thread/580234cb-e870-4af1-9a91-3e3ba118c89c

答案 1 :(得分:8)

不需要使用反射(以及错误的idead恕我直言),因为框架已经有了实用程序类(但它们并不明显: - )。

以下是基于这篇文章的答案:Enumerate BindingsLocalValueEnumerator Structure

    public static IEnumerable<DependencyProperty> EnumerateDependencyProperties(this DependencyObject obj)
    {
        if (obj != null)
        {
            LocalValueEnumerator lve = obj.GetLocalValueEnumerator();
            while (lve.MoveNext())
            {
                yield return lve.Current.Property;
            }
        }
    }

以下是基于另一篇文章的另一个答案:使用Getting list of all dependency/attached properties of an ObjectMarkupWriter.GetMarkupObjectFor Method

    public static IEnumerable<DependencyProperty> EnumerateDependencyProperties(object element)
    {
        if (element != null)
        {
            MarkupObject markupObject = MarkupWriter.GetMarkupObjectFor(element);
            if (markupObject != null)
            {
                foreach (MarkupProperty mp in markupObject.Properties)
                {
                    if (mp.DependencyProperty != null)
                        yield return mp.DependencyProperty;
                }
            }
        }
    }

    public static IEnumerable<DependencyProperty> EnumerateAttachedProperties(object element)
    {
        if (element != null)
        {
            MarkupObject markupObject = MarkupWriter.GetMarkupObjectFor(element);
            if (markupObject != null)
            {
                foreach (MarkupProperty mp in markupObject.Properties)
                {
                    if (mp.IsAttached)
                        yield return mp.DependencyProperty;
                }
            }
        }
    }

答案 2 :(得分:5)

您可以通过GetFields方法使用反射来查找TextBox上的所有公共静态属性。然后,您可以使用Linq Where子句将这些子句过滤为任何DependencyProperty类型:

  var flags = BindingFlags.Static |
              BindingFlags.FlattenHierarchy |
              BindingFlags.Public;
  var dependencyProperties = typeof(TextBox).GetFields(flags)
                     .Where(f => f.FieldType == typeof(DependencyProperty));

然后,您可以通过选择:

将其转换为名称列表
  var dependencyProperties = typeof(TextBox).GetFields(flags)
                     .Where(f => f.FieldType == typeof(DependencyProperty))
                     .Select(dp => dp.Name);

注意:每个名称都有一个'Property'后缀,如果您愿意,您当然可以在上面的Select子句中删除它。

答案 3 :(得分:1)

如果您想要元素的DependencyProperties的名称,那么您可以这样做:

    var results = from prop in typeof(element).GetFields() 
                  where prop.FieldType == typeof(DependencyProperty)
                  select prop.Name.Substring(0, prop.Name.Length - 8);

其中8是字符串“Property”的长度,它出现在依赖属性的末尾!

答案 4 :(得分:0)

尝试

        var fieldInfos = typeof(TextBox).GetFields( BindingFlags.Public | BindingFlags.Static).Where(x=>x.FieldType == typeof(DependencyProperty));
        foreach (var fieldInfo in fieldInfos)
        {
            Console.WriteLine(fieldInfo.Name);
        }