没有答案证明没有直接的做法。所以,我实现了这个功能,这样一来 -
我创建了一个名为RelatedItemSourcePropertyAttribute
像这样的属性 -
/// <summary>
/// Attribute to identify the related item source property.
/// Note: Property should be of IEnumerable type
/// </summary>
[global::System.AttributeUsage(AttributeTargets.Property, Inherited = true, AllowMultiple = false)]
public sealed class RelatedItemSourcePropertyAttribute : Attribute
{
// See the attribute guidelines at
// http://go.microsoft.com/fwlink/?LinkId=85236
private string relatedPropertyName;
public static readonly RelatedItemSourcePropertyAttribute Default = new RelatedItemSourcePropertyAttribute(string.Empty);
/// <summary>
/// Initializes a new instance of the <see cref="RelatedPropertyAttribute"/> class.
/// </summary>
/// <param name="relatedPropertyName">Name of the related property.</param>
public RelatedItemSourcePropertyAttribute(string relatedPropertyName)
{
this.relatedPropertyName = relatedPropertyName;
}
/// <summary>
/// Gets a value indicating whether [related property name].
/// </summary>
/// <value><c>true</c> if [related property name]; otherwise, <c>false</c>.</value>
public string RelatedPropertyName
{
get { return relatedPropertyName; }
}
/// <summary>
/// Determines whether the specified <see cref="System.Object"/> is equal to this instance.
/// </summary>
/// <param name="obj">The <see cref="System.Object"/> to compare with this instance.</param>
/// <returns>
/// <c>true</c> if the specified <see cref="System.Object"/> is equal to this instance; otherwise, <c>false</c>.
/// </returns>
public override bool Equals(object obj)
{
if (!(obj is RelatedItemSourcePropertyAttribute))
return false;
if (obj == this)
return true;
return ((RelatedItemSourcePropertyAttribute)obj).relatedPropertyName == relatedPropertyName;
}
/// <summary>
/// Returns a hash code for this instance.
/// </summary>
/// <returns>
/// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.
/// </returns>
public override int GetHashCode()
{
return relatedPropertyName.GetHashCode();
}
/// <summary>
/// When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.
/// </summary>
/// <returns>
/// true if this instance is the default attribute for the class; otherwise, false.
/// </returns>
public override bool IsDefaultAttribute()
{
return relatedPropertyName == RelatedItemSourcePropertyAttribute.Default.relatedPropertyName;
}
}
此属性将采取相关项目源属性(其值的属性名称将被用来填补落下)。它会像这样使用 -
[RelatedItemSourceProperty("UnitNames")]
public virtual string SelectedUnit
{
get { return (string)GetValue(SelectedUnitProperty); }
set { SetValue(SelectedUnitProperty, value); }
}
public static readonly DependencyProperty SelectedUnitProperty =
DependencyProperty.Register("SelectedUnit", typeof(string), typeof(BaseControl),
new UIPropertyMetadata(string.Empty, new PropertyChangedCallback(SelectedUnitChangedCallBack)));
public virtual ObservableCollection<string> UnitNames
{
get { return (ObservableCollection<string>)GetValue(UnitNamesProperty); }
set { SetValue(UnitNamesProperty, value); }
}
public static readonly DependencyProperty UnitNamesProperty =
DependencyProperty.Register("UnitNames", typeof(ObservableCollection<string>),
typeof(BaseProperties), new PropertyMetadata(null)); //Validation
然后在属性中绑定相关的项目源属性与组合框。
希望看到更好的解决方案,然后:)
我有同样的情况。我需要为WPG添加收集支持。我实现了这个代码;但我认为还不够。 – 2010-10-22 08:30:22
@Bahadir arslan:你能否提供更多关于你所面临的具体问题/错误的细节?我在我的应用程序中实现了相同的功能,并且工作正常。 – akjoshi 2010-10-22 11:14:14
我需要显示一个属性作为列表。例如,用户可以在城市列表中选择城市。所以我找到了你的帖子;但我无法达到:)当我实现你的解决方案时,首先依赖项属性在属性网格上变得可见,其次我的属性(SelectedUnitProperty)显示为TextBox。之后,我找到了WPGTemplates.xaml并编辑了IList类型模板;所以我可以显示我的列表为组合框:) – 2010-10-22 12:00:26