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LookupBindingPropertiesAttribute Class

Specifies the properties that support lookup-based binding. This class cannot be inherited.

System.Object
  System.Attribute
    System.ComponentModel.LookupBindingPropertiesAttribute

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

[AttributeUsageAttribute(AttributeTargets.Class)]
public sealed class LookupBindingPropertiesAttribute : Attribute

The LookupBindingPropertiesAttribute type exposes the following members.

  NameDescription
Public methodLookupBindingPropertiesAttribute()Initializes a new instance of the LookupBindingPropertiesAttribute class using no parameters.
Public methodLookupBindingPropertiesAttribute(String, String, String, String)Initializes a new instance of the LookupBindingPropertiesAttribute class.
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  NameDescription
Public propertyDataSourceGets the name of the data source property for the component to which the LookupBindingPropertiesAttribute is bound.
Public propertyDisplayMemberGets the name of the display member property for the component to which the LookupBindingPropertiesAttribute is bound.
Public propertyLookupMemberGets the name of the lookup member for the component to which this attribute is bound.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
Public propertyValueMemberGets the name of the value member property for the component to which the LookupBindingPropertiesAttribute is bound.
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  NameDescription
Public methodEqualsDetermines whether the specified Object is equal to the current LookupBindingPropertiesAttribute instance. (Overrides Attribute.Equals(Object).)
Public methodGetHashCodeReturns the hash code for this instance. (Overrides Attribute.GetHashCode().)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberDefaultRepresents the default value for the LookupBindingPropertiesAttribute class.
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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The LookupBindingPropertiesAttribute is used to specify the properties used with lookup-based binding, particularly ListBox and ComboBox controls.

The LookupBindingPropertiesAttribute is specified at the class level. The class can be inherited and does not allow multiple attributes on the same class.

The following code example shows properties used with lookup-based binding.

// The DemoControl class shows properties  
// used with lookup-based binding.
[LookupBindingProperties(
    "DataSource", 
    "DisplayMember", 
    "ValueMember", 
    "LookupMember")]
public class DemoControl : Control
{   
}

The LookupBindingPropertiesAttribute attribute must include all four members, except when unsetting values. The following code example shows the ComboBox control.

// The DemoComboBox control shows a standard 
// combo box binding definition.
[LookupBindingProperties(
    "DataSource", 
    "DisplayMember", 
    "ValueMember", 
    "SelectedValue")]
public class DemoComboBox : Control
{
}

The following code example shows that a control can support both simple binding as well as list binding.

// The DemoComboBox2 class shows that a control can 
// support both simple binding as well as list binding.
[LookupBindingProperties(
    "DataSource", 
    "DisplayMember", 
    "ValueMember", 
    "SelectedValue")]
[DefaultBindingProperty("Text")]
public class DemoComboBox2 : Control 
{
}

The following code example shows that the LookupBindingPropertiesAttribute attribute can be unset by specifying no arguments.

// NonBindableCombo control shows how to unset the 
// LookupBindingProperties by specifying no arguments.
[LookupBindingProperties()]
public class NonBindableCombo : Control
{
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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