[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Specifies flags that control binding and the way in which the search for members and types is conducted by reflection.
This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
|Reflection should create an instance of the specified type. This flag calls the constructor that matches the given arguments. The supplied member name is ignored. If the type of lookup is not specified, (Instance | Public) will apply. It is not possible to call a type initializer.|
|Only members declared at the level of the supplied type's hierarchy should be considered. Inherited members are not considered.|
|No binding flag.|
|Types of the supplied arguments must exactly match the types of the corresponding formal parameters. Reflection throws an exception if the caller supplies a non-null Binder object, because that implies that the caller is supplying BindToXXX implementations that will pick the appropriate method. The default binder ignores this flag, whereas custom binders can implement the semantics of this flag.|
|Public and protected static members up the hierarchy should be returned. Private static members in inherited classes are not returned. Static members include fields, methods, events, and properties. Nested types are not returned.|
|The value of the specified field should be returned.|
|The value of the specified property should be returned.|
|The case of the member name should not be considered when binding.|
|Used in COM interop to specify that the return value of the member can be ignored.|
|Instance members should be included in the search.|
|A method is to be invoked. This must not be a constructor or a type initializer.|
|Non-public members should be included in the search.|
|The set of members whose parameter count matches the number of supplied arguments should be returned. This binding flag is used for methods with parameters that have default values and methods with variable arguments (varargs). This flag should only be used with the Type.InvokeMember method. Parameters with default values are used only in calls where trailing arguments are omitted. They must be the last arguments.|
|Public members should be included in the search.|
|The PROPPUT member on a COM object should be invoked. PROPPUT specifies a property-setting function that uses a value. Use PutDispProperty if a property has both PROPPUT and PROPPUTREF and you need to distinguish which one is called.|
|The PROPPUTREF member on a COM object should be invoked. PROPPUTREF specifies a property-setting function that uses a reference instead of a value. Use PutRefDispProperty if a property has both PROPPUT and PROPPUTREF and you need to distinguish which one is called.|
|The value of the specified field should be set.|
|The value of the specified property should be set. For COM properties, specifying this binding flag is equivalent to specifying PutDispProperty and PutRefDispProperty.|
|Static members should be included in the search.|
The flags specified by the enumeration control binding for many operations performed by classes in the System and System.Reflection namespaces. Under the general heading of reflection, these operations invoke, create, get, set, and find members and types. For example, binding flags are used in overloads of the following methods of Type, Activator, and MethodBase:
InvokeMember and GetMethod are especially important.
The binding flags can be categorized by how they identify a type member, as listed in the following table.
Identified by accessibility
Identified by binding argument
Identified by operation
You must specify Instance or Static along with Public or NonPublic. Otherwise, no members will be returned.
The following table lists the coercions performed by the default Binder.ChangeType method. This table applies especially to the ExactBinding binding flag.
Its base type.
The interface it implements.
UInt16, UInt32, Int32, UInt64, Int64, Single, Double
Char, UInt16, Int16, UInt32, Int32, UInt64, Int64, Single, Double
Int16, Int32, Int64, Single, Double
UInt32, Int32, UInt64, Int64, Single, Double
Int32, Int64, Single, Double
UInt64, Int64, Single, Double
Int64, Single, Double