Artikel
11/18/2011

Type.GetMethodImpl Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

When overridden in a derived class, searches for the specified method whose parameters match the specified argument types and modifiers, using the specified binding constraints and the specified calling convention.

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

Syntax

'Declaration
Protected MustOverride Function GetMethodImpl ( _
    name As String, _
    bindingAttr As BindingFlags, _
    binder As Binder, _
    callConvention As CallingConventions, _
    types As Type(), _
    modifiers As ParameterModifier() _
) As MethodInfo

protected abstract MethodInfo GetMethodImpl(
    string name,
    BindingFlags bindingAttr,
    Binder binder,
    CallingConventions callConvention,
    Type[] types,
    ParameterModifier[] modifiers
)

Parameters

name
Type: System.String
The String containing the name of the method to get.

bindingAttr
Type: System.Reflection.BindingFlags
A bitmask comprised of one or more BindingFlags that specify how the search is conducted.
-or-
Zero, to return nulla null reference (Nothing in Visual Basic).

binder
Type: System.Reflection.Binder
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.
-or-
A null reference (Nothing in Visual Basic), to use the DefaultBinder.

callConvention
Type: System.Reflection.CallingConventions
The CallingConventions object that specifies the set of rules to use regarding the order and layout of arguments, how the return value is passed, what registers are used for arguments, and what process cleans up the stack.

types
Type: array<System.Type[]
An array of Type objects representing the number, order, and type of the parameters for the method to get.
-or-
An empty array of the type Type (that is, Type[] types = new Type[0]) to get a method that takes no parameters.
-or-
A null reference (Nothing in Visual Basic). If types is nulla null reference (Nothing in Visual Basic), arguments are not matched.

modifiers
Type: array<System.Reflection.ParameterModifier[]
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.

Return Value

Type: System.Reflection.MethodInfo
A MethodInfo object representing the method that matches the specified requirements, if found; otherwise, nulla null reference (Nothing in Visual Basic).

Exceptions

Exception	Condition
AmbiguousMatchException	More than one method is found with the specified name and matching the specified binding constraints.
ArgumentNullException	name is nulla null reference (Nothing in Visual Basic).
ArgumentException	types is multidimensional. -or- modifiers is multidimensional. -or- types and modifiers do not have the same length.
NotSupportedException	The current type is a TypeBuilder or GenericTypeParameterBuilder.

Remarks

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.

If types is nulla null reference (Nothing in Visual Basic), arguments are not matched.

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 methods 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 methods in the search.
Specify BindingFlags.NonPublic to include non-public methods (that is, private and protected methods) in the search.
Specify BindingFlags.FlattenHierarchy to include public and protected static members up the hierarchy; private static members in inherited classes are not included.

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 methods declared on the Type, not methods that were simply inherited.

See System.Reflection.BindingFlags for more information.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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