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Type.GetTypeFromProgID Method (String, String, Boolean)

Gets the type associated with the specified program identifier (progID) from the specified server, specifying whether to throw an exception if an error occurs while loading the type.

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

'Declaration
Public Shared Function GetTypeFromProgID ( _
	progID As String, _
	server As String, _
	throwOnError As Boolean _
) As Type

Parameters

progID
Type: System.String
The progID of the Type to get.
server
Type: System.String
The server from which to load the type. If the server name is Nothing, this method automatically reverts to the local machine.
throwOnError
Type: System.Boolean
true to throw any exception that occurs.
-or-
false to ignore any exception that occurs.

Return Value

Type: System.Type
The type associated with the specified program identifier (progID), if progID is a valid entry in the registry and a type is associated with it; otherwise, Nothing.

ExceptionCondition
ArgumentException

progID is Nothing.

COMException

The specified progID is not registered.

This method is provided for COM support. Program IDs are not used in Microsoft .NET Framework because they have been superseded by the concept of namespace.

The following example retrieves a type by passing a ProgID and server name. The example then displays the ClassID related to the ProgID, specifying whether to throw an exception if the ProgID or the server name is invalid.


Imports System
Class MainApp
    Public Shared Sub Main()
        Try
            ' Use Server localhost.
            Dim theServer As String = "localhost"
            ' Use  ProgID HKEY_CLASSES_ROOT\DirControl.DirList.1.
            Dim myString1 As String = "DirControl.DirList.1"
            ' Use a wrong ProgID WrongProgID.
            Dim myString2 As String = "WrongProgID"
            ' Make a call to the method to get the type information for the given ProgID.
            Dim myType1 As Type = Type.GetTypeFromProgID(myString1, theServer, True)
            Console.WriteLine("GUID for ProgID DirControl.DirList.1 is {0}.", myType1.GUID.ToString())
            ' Throw an exception because the ProgID is invalid and the throwOnError 
            ' parameter is set to True.
            Dim myType2 As Type = Type.GetTypeFromProgID(myString2, theServer, True)
        Catch e As Exception
            Console.WriteLine("An exception occurred. The ProgID is wrong.")
            Console.WriteLine("Source: {0}", e.Source.ToString())
            Console.WriteLine("Message: {0}", e.Message.ToString())
        End Try
    End Sub 'Main 
End Class 'MainApp


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

    Requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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