Type.GetProperty Method (String, BindingFlags, Binder, Type, Type, ParameterModifier)
Searches for the specified property whose parameters match the specified argument types and modifiers, using the specified binding constraints.
[Visual Basic] Overloads Public Overridable Function GetProperty( _ ByVal name As String, _ ByVal bindingAttr As BindingFlags, _ ByVal binder As Binder, _ ByVal returnType As Type, _ ByVal types() As Type, _ ByVal modifiers() As ParameterModifier _ ) As PropertyInfo Implements IReflect.GetProperty [C#] public virtual PropertyInfo GetProperty( string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type types, ParameterModifier modifiers ); [C++] public: virtual PropertyInfo* GetProperty( String* name, BindingFlags bindingAttr, Binder* binder, Type* returnType, Type* types, ParameterModifier modifiers ); [JScript] public function GetProperty( name : String, bindingAttr : BindingFlags, binder : Binder, returnType : Type, types : Type, modifiers : ParameterModifier ) : PropertyInfo;
- The String containing the name of the property to get.
- A bitmask comprised of one or more BindingFlags that specify how the search is conducted.
Zero, to return a null reference (Nothing in Visual Basic).
- A Binder object that defines a set of properties and enables binding, which can involve selection of an overloaded method, coercion of argument types, and invocation of a member through reflection.
A null reference (Nothing in Visual Basic), to use the DefaultBinder.
- The return type of the property.
- An array of Type objects representing the number, order, and type of the parameters for the indexed property to get.
An empty array of the type Type (that is, Type types = new Type) to get a property that is not indexed.
- An array of ParameterModifier objects representing the attributes associated with the corresponding element in the types array. The default binder does not process this parameter.
A PropertyInfo object representing the property that matches the specified requirements, if found; otherwise, a null reference (Nothing in Visual Basic).
|AmbiguousMatchException||More than one property is found with the specified name and matching the specified binding constraints.|
|ArgumentNullException||name is a null reference (Nothing in Visual Basic).
types is a null reference (Nothing).
One of the elements in types is a null reference (Nothing).
|ArgumentException||types is multidimensional.
modifiers is multidimensional.
types and modifiers do not have the same length.
Although the default binder does not process ParameterModifier (the modifiers parameter), you can use the abstract System.Reflection.Binder class to write a custom binder that does process modifiers. ParameterModifier is only used when calling through COM interop, and only parameters that are passed by reference are handled.
The following table shows what members of a base class are returned by the Get methods when reflecting on a type.
|Field||No||Yes. A field is always hide-by-name-and-signature.|
|Event||Not applicable||The common type system rule is that the inheritance is the same as that of the methods that implement the property. Reflection treats properties as hide-by-name-and-signature. See note 2 below.|
|Method||No||Yes. A method (both virtual and non-virtual) can be hide-by-name or hide-by-name-and-signature.|
|Property||Not applicable||The common type system rule is that the inheritance is the same as that of the methods that implement the property. Reflection treats properties as hide-by-name-and-signature. See note 2 below.|
- Hide-by-name-and-signature considers all of the parts of the signature, including custom modifiers, return types, parameter types, sentinels, and unmanaged calling conventions. This is a binary comparison.
- For reflection, properties and events are hide-by-name-and-signature. If you have a property with both a get and a set accessor in the base class, but the derived class has only a get accessor, the derived class property hides the base class property, and you will not be able to access the setter on the base class.
- Custom attributes are not part of the common type system.
The types array and the modifiers array have the same length. A parameter specified in the types array can have the following attributes, which are specified in the modifiers array: pdIn, pdOut, pdLcid, pdRetval, pdOptional, and pdHasDefault, which represent [In], [Out], [lcid], [retval], [optional], and a value specifying whether the parameter has a default value. A parameter's associated attributes are stored in the metadata and enhance interoperability.
The following BindingFlags filter flags can be used to define which properties to include in the search:
- You must specify either BindingFlags.Instance or BindingFlags.Static in order to get a return.
- Specify BindingFlags.Public to include public properties in the search.
- Specify BindingFlags.NonPublic to include non-public properties (that is, private and protected properties) in the search.
- Specify BindingFlags.FlattenHierarchy to include static properties up the hierarchy.
The following BindingFlags modifier flags can be used to change how the search works:
- BindingFlags.IgnoreCase to ignore the case of name.
- BindingFlags.DeclaredOnly to search only the properties declared on the Type, not properties that were simply inherited.
See System.Reflection.BindingFlags for more information.
If the requested type is non-public and the caller does not have ReflectionPermission to reflect non-public objects outside the current assembly, this method returns a null reference (Nothing in Visual Basic).
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard
Type Class | Type Members | System Namespace | Type.GetProperty Overload List | PropertyInfo | String | BindingFlags | Binder | DefaultBinder | ParameterModifier | ReflectionPermission | GetPropertyImpl | GetProperties