BindingBase.BindingGroupName Property

Definition

이 바인딩이 속하는 BindingGroup의 이름을 가져오거나 설정합니다.Gets or sets the name of the BindingGroup to which this binding belongs.

public:
 property System::String ^ BindingGroupName { System::String ^ get(); void set(System::String ^ value); };
public string BindingGroupName { get; set; }
member this.BindingGroupName : string with get, set
Public Property BindingGroupName As String

Property Value

String

이 바인딩이 속하는 BindingGroup의 이름입니다.The name of the BindingGroup to which this binding belongs.

Examples

다음 예제는 사용자가 값과 동일 하 게 두 개체의 속성을 설정 하는지 여부를 확인 하는 애플리케이션의 일부입니다.The following examples are part of an application that checks whether the user has set the properties of two objects to equal values. 첫 번째 예제에서는 각각 다른 소스에 데이터 바인딩된 두 개의 TextBox 컨트롤을 만듭니다. TextBoxDataContext를 상속 하 고 부모에서 BindingGroup를 상속 하기 때문에 첫 번째 TextBox의 바인딩은 BindingGroup의 일부입니다 StackPanelThe first example creates two TextBox controls, each of which is data bound to a different source: The binding of the first TextBox is part of the BindingGroup because the TextBox inherits the DataContext and BindingGroup from its parent StackPanel

두 번째 바인딩 TextBox 의 일부인 합니다 BindingGroup 때문에 NameBindingGroupBindingGroupNameBinding 로 설정 됩니다 bindingGroup합니다.The binding on the second TextBox is part of the BindingGroup because the Name of the BindingGroup and the BindingGroupName of the Binding are both set to bindingGroup.

<StackPanel Name="sp1"
            Margin="5"
            DataContext="{Binding Source={StaticResource object1}}"
            Validation.ValidationAdornerSite="{Binding ElementName=label1}"
            Orientation="Horizontal"
            HorizontalAlignment="Center">

  <StackPanel.BindingGroup>
    <BindingGroup Name="bindingGroup">
      <BindingGroup.ValidationRules>
        <src:BindingGroupValidationRule ValidatesOnTargetUpdated="True" />
      </BindingGroup.ValidationRules>
    </BindingGroup>
  </StackPanel.BindingGroup>

  <TextBlock Text="First string" />

  <TextBox Width="150"
           Text="{Binding Path=PropertyA}" />

  <TextBlock Text="Second string" />

  <TextBox Width="150"
           Text="{Binding Source={StaticResource object2}, 
    Path=PropertyB, BindingGroupName=bindingGroup, 
    TargetNullValue=please enter a string}" />

</StackPanel>
<Label Name="label1"
       Content="{Binding ElementName=sp1, Path=(Validation.Errors)[0].ErrorContent}"
       Margin="5"
       Foreground="Red"
       HorizontalAlignment="Center" />

다음 예제는 ValidationRule 앞의 예제를 사용 하는 합니다.The following example shows the ValidationRule that the previous example uses. Validate 메서드를 예제에서 각 원본 개체를 가져옵니다는 BindingGroup 개체 속성이 같은지 여부를 확인 합니다.In the Validate method, the example gets each source object from the BindingGroup and checks whether the properties of the objects are equal.

public class Type1
{
    public string PropertyA { get; set; }

    public Type1()
    {
        PropertyA = "Default Value";
    }
}

public class Type2
{
    public string PropertyB { get; set; }

    public Type2()
    {
    }
}

public class BindingGroupValidationRule : ValidationRule
{
    public override ValidationResult Validate(object value, System.Globalization.CultureInfo cultureInfo)
    {
        BindingGroup bg = value as BindingGroup;

        Type1 object1 = null;
        Type2 object2 = null;

        foreach (object item in bg.Items)
        {
            if (item is Type1)
            {
                object1 = item as Type1;
            }

            if (item is Type2)
            {
                object2 = item as Type2;
            }
        }

        if (object1 == null || object2 == null)
        {
            return new ValidationResult(false, "BindingGroup did not find source object.");
        }

        string string1 = bg.GetValue(object1, "PropertyA") as string;
        string string2 = bg.GetValue(object2, "PropertyB") as string;

        if (string1 != string2)
        {
            return new ValidationResult(false, "The two strings must be identical.");
        }

        return ValidationResult.ValidResult;
    }
}
Public Class Type1
    Public Property PropertyA() As String

    Public Sub New()
        PropertyA = "Default Value"
    End Sub
End Class

Public Class Type2
    Public Property PropertyB() As String

    Public Sub New()
    End Sub
End Class

Public Class BindingGroupValidationRule
    Inherits ValidationRule
    Public Overrides Function Validate(ByVal value As Object, ByVal cultureInfo As System.Globalization.CultureInfo) As ValidationResult
        Dim bg As BindingGroup = TryCast(value, BindingGroup)

        Dim object1 As Type1 = Nothing
        Dim object2 As Type2 = Nothing

        For Each item As Object In bg.Items
            If TypeOf item Is Type1 Then
                object1 = TryCast(item, Type1)
            End If

            If TypeOf item Is Type2 Then
                object2 = TryCast(item, Type2)
            End If
        Next item

        If object1 Is Nothing OrElse object2 Is Nothing Then
            Return New ValidationResult(False, "BindingGroup did not find source object.")
        End If

        Dim string1 As String = TryCast(bg.GetValue(object1, "PropertyA"), String)
        Dim string2 As String = TryCast(bg.GetValue(object2, "PropertyB"), String)

        If string1 <> string2 Then
            Return New ValidationResult(False, "The two strings must be identical.")
        End If

        Return ValidationResult.ValidResult

    End Function

End Class

Remarks

BindingGroupName를 설정 하지 않으면 바인딩의 소스와 BindingGroup 있는 부모 요소의 DataContext가 같은 개체인 경우에만 바인딩이 BindingGroup에 속합니다.If BindingGroupName is not set, the binding belongs to a BindingGroup only if the binding's source and the DataContext of the parent element that has the BindingGroup are the same object.

BindingGroupName이 값으로 설정 된 경우 다음 조건이 충족 되 면 바인딩이 BindingGroup에 속합니다.If BindingGroupName is set to a value, the binding belongs to a BindingGroup if the following conditions are true:

BindingGroupNamenull로 설정 하면 바인딩이 BindingGroup에 포함 되지 않습니다.If BindingGroupName is set to null, the binding is never a part of a BindingGroup.

다른 소스가 있는 바인딩을 포함할 수 있습니다는 DataContext 있는 부모 요소의 합니다 BindingGroup 설정 하 여 NameBindingGroupBindingGroupName 동일한 값에 대 한 바인딩의 속성입니다.You can include bindings that have a source that is different from the DataContext of the parent element that has the BindingGroup by setting Name of the BindingGroup and the BindingGroupName property of a binding to the same value. 동일한 소스에 있는 바인딩을 제외할 수 있습니다 DataContext 있는 부모 요소의 합니다 BindingGroup 설정 하 여 NameBindingGroupBindingGroupName 서로 다른 값에 대 한 바인딩의 속성입니다.You can exclude bindings that have the same source as DataContext of the parent element that has the BindingGroup by setting Name of the BindingGroup and the BindingGroupName property of a binding to different values.

Applies to