Type.GetInterface Method

Definition

Namespace:

System

Assembly:

System.Runtime.dll

Gets a specific interface implemented or inherited by the current Type.

Overloads

GetInterface(String)	Searches for the interface with the specified name.
GetInterface(String, Boolean)	When overridden in a derived class, searches for the specified interface, specifying whether to do a case-insensitive search for the interface name.

GetInterface(String)

Source:

Type.cs

Searches for the interface with the specified name.

public:
 Type ^ GetInterface(System::String ^ name);

public Type? GetInterface (string name);

member this.GetInterface : string -> Type

Public Function GetInterface (name As String) As Type

Parameters

name

String

The string containing the name of the interface to get. For generic interfaces, this is the mangled name.

Returns

Type

An object representing the interface with the specified name, implemented or inherited by the current Type, if found; otherwise, null.

Exceptions

ArgumentNullException

name is null.

AmbiguousMatchException

The current Type represents a type that implements the same generic interface with different type arguments.

Examples

The following code example uses the GetInterface(String) method to search the Hashtable class for the IDeserializationCallback interface, and lists the methods of the interface.

The code example also demonstrates the GetInterface(String, Boolean) method overload and the GetInterfaceMap method.

int main()
{
   Hashtable^ hashtableObj = gcnew Hashtable;
   Type^ objType = hashtableObj->GetType();
   array<MemberInfo^>^arrayMemberInfo;
   array<MethodInfo^>^arrayMethodInfo;
   try
   {
      // Get the methods implemented in 'IDeserializationCallback' interface.
      arrayMethodInfo = objType->GetInterface( "IDeserializationCallback" )->GetMethods();
      Console::WriteLine( "\nMethods of 'IDeserializationCallback' Interface :" );
      for ( int index = 0; index < arrayMethodInfo->Length; index++ )
         Console::WriteLine( arrayMethodInfo[ index ] );
      
      // Get FullName for interface by using Ignore case search.
      Console::WriteLine( "\nMethods of 'IEnumerable' Interface" );
      arrayMethodInfo = objType->GetInterface( "ienumerable", true )->GetMethods();
      for ( int index = 0; index < arrayMethodInfo->Length; index++ )
         Console::WriteLine( arrayMethodInfo[ index ] );
      
      //Get the Interface methods for 'IDictionary*' interface
      InterfaceMapping interfaceMappingObj;
      interfaceMappingObj = objType->GetInterfaceMap( IDictionary::typeid );
      arrayMemberInfo = interfaceMappingObj.InterfaceMethods;
      Console::WriteLine( "\nHashtable class Implements the following IDictionary Interface methods :" );
      for ( int index = 0; index < arrayMemberInfo->Length; index++ )
         Console::WriteLine( arrayMemberInfo[ index ] );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception : {0}", e );
   }
}

public static void Main()
{
    Hashtable hashtableObj = new Hashtable();
    Type objType = hashtableObj.GetType();
    MethodInfo[] arrayMethodInfo;
    MemberInfo[] arrayMemberInfo;
    try
    {
        // Get the methods implemented in 'IDeserializationCallback' interface.
        arrayMethodInfo =objType.GetInterface("IDeserializationCallback").GetMethods();
        Console.WriteLine ("\nMethods of 'IDeserializationCallback' Interface :");
        foreach(MethodInfo methodInfo in arrayMethodInfo)
            Console.WriteLine (methodInfo);

        // Get FullName for interface by using Ignore case search.
        Console.WriteLine ("\nMethods of 'IEnumerable' Interface");
        arrayMethodInfo = objType.GetInterface("ienumerable",true).GetMethods();
        foreach(MethodInfo methodInfo in arrayMethodInfo)
           Console.WriteLine (methodInfo);

        //Get the Interface methods for 'IDictionary' interface
        InterfaceMapping interfaceMappingOb = objType.GetInterfaceMap(typeof(IDictionary));
        arrayMemberInfo = interfaceMappingObj.InterfaceMethods;
        Console.WriteLine ("\nHashtable class Implements the following IDictionary Interface methods :");
        foreach(MemberInfo memberInfo in arrayMemberInfo)
           Console.WriteLine (memberInfo);
    }
    catch (Exception e)
    {
        Console.WriteLine ("Exception : " + e.ToString());
    }
}

let hashtableObj = Hashtable()
let objType = hashtableObj.GetType()
try
    // Get the methods implemented in 'IDeserializationCallback' interface.
    let arrayMethodInfo = objType.GetInterface("IDeserializationCallback").GetMethods()
    printfn "\nMethods of 'IDeserializationCallback' Interface :"
    for methodInfo in arrayMethodInfo do
        printfn $"{methodInfo}"

    // Get FullName for interface by using Ignore case search.
    printfn "\nMethods of 'IEnumerable' Interface"
    let arrayMethodInfo = objType.GetInterface("ienumerable",true).GetMethods()
    for methodInfo in arrayMethodInfo do
        printfn $"{methodInfo}"

    //Get the Interface methods for 'IDictionary' interface
    let interfaceMappingObj = objType.GetInterfaceMap typeof<IDictionary>
    let arrayMemberInfo = interfaceMappingObj.InterfaceMethods
    printfn "\nHashtable class Implements the following IDictionary Interface methods :"
    for memberInfo in arrayMemberInfo do
        printfn $"{memberInfo}"
with e ->
    printfn $"Exception : {e}"

   Public Shared Sub Main()
      Dim hashtableObj As New Hashtable()
      Dim objType As Type = hashtableObj.GetType()
      Dim arrayMemberInfo() As MemberInfo
      Dim arrayMethodInfo() As MethodInfo
      Try
         ' Get the methods implemented in 'IDeserializationCallback' interface.
         arrayMethodInfo = objType.GetInterface("IDeserializationCallback").GetMethods()
         Console.WriteLine(ControlChars.Cr + "Methods of 'IDeserializationCallback' Interface :")
         Dim index As Integer
         For index = 0 To arrayMethodInfo.Length - 1
            Console.WriteLine(arrayMethodInfo(index).ToString())
         Next index
         ' Get FullName for interface by using Ignore case search.
         Console.WriteLine(ControlChars.Cr + "Methods of 'IEnumerable' Interface")
         arrayMethodInfo = objType.GetInterface("ienumerable", True).GetMethods()
         For index = 0 To arrayMethodInfo.Length - 1
            Console.WriteLine(arrayMethodInfo(index).ToString())
         Next index
         'Get the Interface methods for 'IDictionary' interface
         Dim interfaceMappingObj As InterfaceMapping
         interfaceMappingObj = objType.GetInterfaceMap(GetType(IDictionary))
         arrayMemberInfo = interfaceMappingObj.InterfaceMethods
         Console.WriteLine(ControlChars.Cr + "Hashtable class Implements the following IDictionary Interface methods :")
         For index = 0 To arrayMemberInfo.Length - 1
            Console.WriteLine(arrayMemberInfo(index).ToString())
         Next index
      Catch e As Exception
         Console.WriteLine(("Exception : " + e.ToString()))
      End Try
   End Sub
End Class

Remarks

The search for name is case-sensitive.

If the current Type represents a constructed generic type, this method returns the Type 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 interface constraints and any interfaces inherited from class or interface constraints.

Note

For generic interfaces, the name parameter is the mangled name, ending with a grave accent (`) and the number of type parameters. This is true for both generic interface definitions and constructed generic interfaces. For example, to find IExample<T> (IExample(Of T) in Visual Basic) or IExample<string> (IExample(Of String) in Visual Basic), search for "IExample`1".

See also

• String
• GetInterfaces()
• FindInterfaces(TypeFilter, Object)

GetInterface(String, Boolean)

Source:

Type.cs

When overridden in a derived class, searches for the specified interface, specifying whether to do a case-insensitive search for the interface name.

public:
 abstract Type ^ GetInterface(System::String ^ name, bool ignoreCase);

public abstract Type? GetInterface (string name, bool ignoreCase);

abstract member GetInterface : string * bool -> Type

Public MustOverride Function GetInterface (name As String, ignoreCase As Boolean) As Type

Parameters

name

String

The string containing the name of the interface to get. For generic interfaces, this is the mangled name.

ignoreCase

Boolean

true to ignore the case of that part of name that specifies the simple interface name (the part that specifies the namespace must be correctly cased).

-or-

false to perform a case-sensitive search for all parts of name.

Returns

Type

An object representing the interface with the specified name, implemented or inherited by the current Type, if found; otherwise, null.

Exceptions

ArgumentNullException

name is null.

AmbiguousMatchException

The current Type represents a type that implements the same generic interface with different type arguments.

Examples

The following code example uses the GetInterface(String, Boolean) method to perform a case-insensitive search of the Hashtable class for the IEnumerable interface.

The code example also demonstrates the GetInterface(String) method overload and the GetInterfaceMap method.

int main()
{
   Hashtable^ hashtableObj = gcnew Hashtable;
   Type^ objType = hashtableObj->GetType();
   array<MemberInfo^>^arrayMemberInfo;
   array<MethodInfo^>^arrayMethodInfo;
   try
   {
      // Get the methods implemented in 'IDeserializationCallback' interface.
      arrayMethodInfo = objType->GetInterface( "IDeserializationCallback" )->GetMethods();
      Console::WriteLine( "\nMethods of 'IDeserializationCallback' Interface :" );
      for ( int index = 0; index < arrayMethodInfo->Length; index++ )
         Console::WriteLine( arrayMethodInfo[ index ] );
      
      // Get FullName for interface by using Ignore case search.
      Console::WriteLine( "\nMethods of 'IEnumerable' Interface" );
      arrayMethodInfo = objType->GetInterface( "ienumerable", true )->GetMethods();
      for ( int index = 0; index < arrayMethodInfo->Length; index++ )
         Console::WriteLine( arrayMethodInfo[ index ] );
      
      //Get the Interface methods for 'IDictionary*' interface
      InterfaceMapping interfaceMappingObj;
      interfaceMappingObj = objType->GetInterfaceMap( IDictionary::typeid );
      arrayMemberInfo = interfaceMappingObj.InterfaceMethods;
      Console::WriteLine( "\nHashtable class Implements the following IDictionary Interface methods :" );
      for ( int index = 0; index < arrayMemberInfo->Length; index++ )
         Console::WriteLine( arrayMemberInfo[ index ] );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception : {0}", e );
   }
}

public static void Main()
{
    Hashtable hashtableObj = new Hashtable();
    Type objType = hashtableObj.GetType();
    MethodInfo[] arrayMethodInfo;
    MemberInfo[] arrayMemberInfo;
    try
    {
        // Get the methods implemented in 'IDeserializationCallback' interface.
        arrayMethodInfo =objType.GetInterface("IDeserializationCallback").GetMethods();
        Console.WriteLine ("\nMethods of 'IDeserializationCallback' Interface :");
        foreach(MethodInfo methodInfo in arrayMethodInfo)
            Console.WriteLine (methodInfo);

        // Get FullName for interface by using Ignore case search.
        Console.WriteLine ("\nMethods of 'IEnumerable' Interface");
        arrayMethodInfo = objType.GetInterface("ienumerable",true).GetMethods();
        foreach(MethodInfo methodInfo in arrayMethodInfo)
           Console.WriteLine (methodInfo);

        //Get the Interface methods for 'IDictionary' interface
        InterfaceMapping interfaceMappingOb = objType.GetInterfaceMap(typeof(IDictionary));
        arrayMemberInfo = interfaceMappingObj.InterfaceMethods;
        Console.WriteLine ("\nHashtable class Implements the following IDictionary Interface methods :");
        foreach(MemberInfo memberInfo in arrayMemberInfo)
           Console.WriteLine (memberInfo);
    }
    catch (Exception e)
    {
        Console.WriteLine ("Exception : " + e.ToString());
    }
}

let hashtableObj = Hashtable()
let objType = hashtableObj.GetType()
try
    // Get the methods implemented in 'IDeserializationCallback' interface.
    let arrayMethodInfo = objType.GetInterface("IDeserializationCallback").GetMethods()
    printfn "\nMethods of 'IDeserializationCallback' Interface :"
    for methodInfo in arrayMethodInfo do
        printfn $"{methodInfo}"

    // Get FullName for interface by using Ignore case search.
    printfn "\nMethods of 'IEnumerable' Interface"
    let arrayMethodInfo = objType.GetInterface("ienumerable",true).GetMethods()
    for methodInfo in arrayMethodInfo do
        printfn $"{methodInfo}"

    //Get the Interface methods for 'IDictionary' interface
    let interfaceMappingObj = objType.GetInterfaceMap typeof<IDictionary>
    let arrayMemberInfo = interfaceMappingObj.InterfaceMethods
    printfn "\nHashtable class Implements the following IDictionary Interface methods :"
    for memberInfo in arrayMemberInfo do
        printfn $"{memberInfo}"
with e ->
    printfn $"Exception : {e}"

   Public Shared Sub Main()
      Dim hashtableObj As New Hashtable()
      Dim objType As Type = hashtableObj.GetType()
      Dim arrayMemberInfo() As MemberInfo
      Dim arrayMethodInfo() As MethodInfo
      Try
         ' Get the methods implemented in 'IDeserializationCallback' interface.
         arrayMethodInfo = objType.GetInterface("IDeserializationCallback").GetMethods()
         Console.WriteLine(ControlChars.Cr + "Methods of 'IDeserializationCallback' Interface :")
         Dim index As Integer
         For index = 0 To arrayMethodInfo.Length - 1
            Console.WriteLine(arrayMethodInfo(index).ToString())
         Next index
         ' Get FullName for interface by using Ignore case search.
         Console.WriteLine(ControlChars.Cr + "Methods of 'IEnumerable' Interface")
         arrayMethodInfo = objType.GetInterface("ienumerable", True).GetMethods()
         For index = 0 To arrayMethodInfo.Length - 1
            Console.WriteLine(arrayMethodInfo(index).ToString())
         Next index
         'Get the Interface methods for 'IDictionary' interface
         Dim interfaceMappingObj As InterfaceMapping
         interfaceMappingObj = objType.GetInterfaceMap(GetType(IDictionary))
         arrayMemberInfo = interfaceMappingObj.InterfaceMethods
         Console.WriteLine(ControlChars.Cr + "Hashtable class Implements the following IDictionary Interface methods :")
         For index = 0 To arrayMemberInfo.Length - 1
            Console.WriteLine(arrayMemberInfo(index).ToString())
         Next index
      Catch e As Exception
         Console.WriteLine(("Exception : " + e.ToString()))
      End Try
   End Sub
End Class

Remarks

The ignoreCase parameter applies only to the simple interface name, not to the namespace. The portion of name that specifies the namespace must have the correct case, or the interface will not be found. For example, the string "System.icomparable" finds the IComparable interface, but the string "system.icomparable" does not.

If the current Type represents a constructed generic type, this method returns the Type 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 interface constraints and any interfaces inherited from class or interface constraints.

Note

For generic interfaces, the name parameter is the mangled name, ending with a grave accent (`) and the number of type parameters. This is true for both generic interface definitions and constructed generic interfaces. For example, to find IExample<T> (IExample(Of T) in Visual Basic) or IExample<string> (IExample(Of String) in Visual Basic), search for "IExample`1".

See also

• String
• GetInterfaces()
• FindInterfaces(TypeFilter, Object)