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Silverlight的DataInput中：标签和DataInput中：DescriptionViewer控制通过其结合到一个TextBox能力提供有用的功能。我不想用System.ComponentModel.DataAnnotations.DisplayAttribute对标签和描述的文本内容进行硬编码，而宁愿将这些属性绑定到包含管理可编辑文本的类的属性。这适用于Label，但不适用于DescriptionViewer。结合Silverlight 3中描述属性：DescriptionViewer
具体来说，这个标签的工作原理：
<dataInput:Label Grid.Row="00" Grid.Column="0"
Target="{Binding ElementName=inpStatus}"
Content="{Binding StatusLabel}" IsRequired="true" />
但这DescriptionViewer是无形的：
<dataInput:DescriptionViewer Grid.Row="00" Grid.Column="3"
Target="{Binding ElementName=inpStatus}"
Name="dvBound2" Description="{Binding Path=StatusDescription}" />
当我删除绑定到我的文本框，在DescriptionViewer所示：
<dataInput:DescriptionViewer Grid.Row="00" Grid.Column="2"
Name="dvBound1" Description="{Binding Path=StatusDescription}" />
应该可以将描述查看器绑定到文本框和替代描述来源？
在此先感谢！
MainPage.xaml中：
<UserControl x:Class="DataInputDemo.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:controlsToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"
xmlns:dataInput="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input"
xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"
mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">
<Grid x:Name="LayoutRoot">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="142"></ColumnDefinition>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="24"></ColumnDefinition>
<ColumnDefinition Width="24"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"></RowDefinition>
<RowDefinition Height="30"></RowDefinition>
</Grid.RowDefinitions>
<dataInput:Label Grid.Row="00" Grid.Column="0"
Target="{Binding ElementName=inpStatus}"
Content="{Binding StatusLabel}" IsRequired="true" />
<TextBox Grid.Row="00" Grid.Column="1"
Text="{Binding Mode=TwoWay, NotifyOnValidationError=True, ValidatesOnExceptions=True, Path=Status}"
Name="inpStatus" MaxLength="025"
BindingValidationError="_BindingValidationError" />
<dataInput:DescriptionViewer Grid.Row="00" Grid.Column="2"
Name="dvBound1" Description="{Binding Path=StatusDescription}" />
<!-- Following DescriptionViewer is not shown. -->
<dataInput:DescriptionViewer Grid.Row="00" Grid.Column="3"
Target="{Binding ElementName=inpStatus}"
Name="dvBound2" Description="{Binding Path=StatusDescription}" />
<dataInput:ValidationSummary Grid.Row="01" Grid.Column="0"
Grid.ColumnSpan="4" Name="VS1" />
</Grid>
</UserControl>
MainPage.xaml.vb：
Partial Public Class MainPage
Inherits UserControl
Public myDataClass = New DataClass
Public Sub New()
InitializeComponent()
myDataClass.status = "Default Status"
myDataClass.StatusLabel = "Status Label"
myDataClass.StatusDescription = "Status Description"
LayoutRoot.DataContext = myDataClass
End Sub
Private Sub _BindingValidationError(ByVal sender As Object, ByVal e As ValidationErrorEventArgs)
End Sub
End Class
DataClass.vb：
Imports System.Collections.ObjectModel
Imports System.ComponentModel
Imports System.Runtime.Serialization
Imports System.ComponentModel.DataAnnotations
Imports System.Windows.Controls
Public Class DataClass
Implements INotifyPropertyChanged
Public Event PropertyChanged As PropertyChangedEventHandler _
Implements INotifyPropertyChanged.PropertyChanged
Private Sub NotifyPropertyChanged(ByVal info As String)
RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
End Sub
Function ValidateEntry(ByVal fieldname As String, ByRef value As Object) As Object
Dim ctx As New ValidationContext(Me, Nothing, Nothing)
ctx.MemberName = fieldname
Validator.ValidateProperty(value, ctx)
Return value
End Function
<DataMember()> _
<Required()> _
<StringLength(100)> _
Public Property Status() As String
Get
Return _Status
End Get
Set(ByVal value As String)
_Status = ValidateEntry("Status", value)
NotifyPropertyChanged("")
End Set
End Property
Private _Status As String
<DataMember()> _
Public Property StatusLabel() As String
Get
Return _StatusLabel
End Get
Set(ByVal value As String)
_StatusLabel = value
NotifyPropertyChanged("")
End Set
End Property
Private _StatusLabel As String
<DataMember()> _
Public Property StatusDescription() As String
Get
Return _StatusDescription
End Get
Set(ByVal value As String)
_StatusDescription = value
NotifyPropertyChanged("")
End Set
End Property
Private _StatusDescription As String
End Class