LookupBindingPropertiesAttribute Class

 

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

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

System.Object
  System.Attribute
    System.ComponentModel.LookupBindingPropertiesAttribute

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

NameDescription
System_CAPS_pubmethodLookupBindingPropertiesAttribute()

Initializes a new instance of the LookupBindingPropertiesAttribute class using no parameters.

System_CAPS_pubmethodLookupBindingPropertiesAttribute(String, String, String, String)

Initializes a new instance of the LookupBindingPropertiesAttribute class.

NameDescription
System_CAPS_pubpropertyDataSource

Gets the name of the data source property for the component to which the LookupBindingPropertiesAttribute is bound.

System_CAPS_pubpropertyDisplayMember

Gets the name of the display member property for the component to which the LookupBindingPropertiesAttribute is bound.

System_CAPS_pubpropertyLookupMember

Gets the name of the lookup member for the component to which this attribute is bound.

System_CAPS_pubpropertyTypeId

When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)

System_CAPS_pubpropertyValueMember

Gets the name of the value member property for the component to which the LookupBindingPropertiesAttribute is bound.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified Object is equal to the current LookupBindingPropertiesAttribute instance. (Overrides Attribute.Equals(Object).)

System_CAPS_pubmethodGetHashCode()

Returns the hash code for this instance.(Overrides Attribute.GetHashCode().)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIsDefaultAttribute()

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)

System_CAPS_pubmethodMatch(Object)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubfieldSystem_CAPS_staticDefault

Represents the default value for the LookupBindingPropertiesAttribute class.

NameDescription
System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfoCount(UInt32)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

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
Available since 2.0
Silverlight
Available since 4.0

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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