Artykuł
11/18/2011

Type.GetMember Method (String, MemberTypes, BindingFlags)

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

Searches for the specified members of the specified member type, using the specified binding constraints.

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

Syntax

'Declaration
Public Overridable Function GetMember ( _
    name As String, _
    type As MemberTypes, _
    bindingAttr As BindingFlags _
) As MemberInfo()

public virtual MemberInfo[] GetMember(
    string name,
    MemberTypes type,
    BindingFlags bindingAttr
)

Parameters

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

type
Type: System.Reflection.MemberTypes
The MemberTypes value to search for.

bindingAttr
Type: System.Reflection.BindingFlags
A bitmask comprised of one or more BindingFlags that specify how the search is conducted.
-or-
Zero, to return an empty array.

Return Value

Type: array<System.Reflection.MemberInfo[]
An array of MemberInfo objects representing the public members with the specified name, if found; otherwise, an empty array.

Exceptions

Exception	Condition
ArgumentNullException	name is nulla null reference (Nothing in Visual Basic).
NotSupportedException	A derived class must provide an implementation.

Remarks

Members include properties, methods, fields, events, and so on.

The GetMember method does not return members in a particular order, such as alphabetical or declaration order. Your code must not depend on the order in which members are returned, because that order varies.

The following BindingFlags filter flags can be used to define which members 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 members in the search.
Specify BindingFlags.NonPublic to include non-public members (that is, private and protected members) 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 members declared on the Type, not members that were simply inherited.

See System.Reflection.BindingFlags for more information.

To get the class initializer (.cctor) using this method overload, you must specify ".cctor" for name, MemberTypes.Constructor for type, and BindingFlags.Static | BindingFlags.NonPublic (BindingFlags.StaticOrBindingFlags.NonPublic in Visual Basic) for bindingAttr.

If the current Type represents a constructed generic type, this method returns the MemberInfo with the type parameters replaced by the appropriate type arguments.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the members of the class constraint, or the members of Object if there is no class constraint.

Note:
For generic methods, do not include the type arguments in name. For example, the C# code GetMember("MyMethod<int>") searches for a member with the text name "MyMethod<int>", rather than for a method named MyMethod that has one generic argument of type int.

Platform Notes

Silverlight for Windows Phone

GetMember does not return any public members with the specified name if the name string is a regular expression.

Examples

The following example displays all the methods of the myString class that start with the letter C.

This code is part of a larger example provided for the GetMember(String) method overload.

Public Sub GetPublicInstanceMethodMemberInfo(ByVal outputBlock As System.Windows.Controls.TextBlock)
   Dim myString As [String] = "GetMember_String_MemberType_BindingFlag"

   Dim myType As Type = myString.GetType()
   ' Get the public instance methods for myString starting with the letter C.
   Dim myMembers As MemberInfo() = myType.GetMember("C*", MemberTypes.Method, BindingFlags.Public Or BindingFlags.Instance)
   If myMembers.Length > 0 Then
      outputBlock.Text += String.Format(ControlChars.Cr + "The public instance method(s) starting with the letter C for type {0}:", myType) & vbCrLf
      Dim index As Integer
      For index = 0 To myMembers.Length - 1
         outputBlock.Text += String.Format("Member {0}: {1}", index + 1, myMembers(index).ToString()) & vbCrLf
      Next index
   Else
      outputBlock.Text &= "No members match the search criteria." & vbCrLf
   End If
End Sub 'GetPublicInstanceMethodMemberInfo

public void GetPublicInstanceMethodMemberInfo(System.Windows.Controls.TextBlock outputBlock)
{
   String myString = "GetMember_String_MemberType_BindingFlag";
   Type myType = myString.GetType();
   // Get the public instance methods for myString starting with the letter C.
   MemberInfo[] myMembers = myType.GetMember("C*", MemberTypes.Method,
       BindingFlags.Public | BindingFlags.Instance);
   if (myMembers.Length > 0)
   {
      outputBlock.Text += String.Format("\nThe public instance method(s) starting with the letter C for type {0}:", myType) + "\n";
      for (int index = 0; index < myMembers.Length; index++)
         outputBlock.Text += String.Format("Member {0}: {1}", index + 1, myMembers[index].ToString()) + "\n";
   }
   else
      outputBlock.Text += "No members match the search criteria." + "\n";
}

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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