Type::GetTypeFromProgID Method (String^, Boolean)

 

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

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

public:
[SecurityCriticalAttribute]
static Type^ GetTypeFromProgID(
	String^ progID,
	bool throwOnError
)

Parameters

progID
Type: System::String^

The ProgID of the type to get.

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, null.

Exception Condition
ArgumentException

progID is null.

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 Program IDs are not used in Microsoft .NET Framework because they have been superseded by the concept of namespace.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, specifying whether to throw an exception if the ProgID is invalid. The example then displays the ClassID related to the ProgID, along with any applicable exception message.

using namespace System;
int main()
{
   try
   {

      // Use the ProgID HKEY_CLASSES_ROOT\DirControl.DirList.1.
      String^ myString1 = "DIRECT.ddPalette.3";

      // Use a nonexistent ProgID WrongProgID.
      String^ myString2 = "WrongProgID";

      // Make a call to the method to get the type information of the given ProgID.
      Type^ myType1 = Type::GetTypeFromProgID( myString1, true );
      Console::WriteLine( "GUID for ProgID DirControl.DirList.1 is {0}.", myType1->GUID );

      // Throw an exception because the ProgID is invalid and the throwOnError
      // parameter is set to True.
      Type^ myType2 = Type::GetTypeFromProgID( myString2, true );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "An exception occurred." );
      Console::WriteLine( "Source: {0}", e->Source );
      Console::WriteLine( "Message: {0}", e->Message );
   }

}

SecurityCriticalAttribute

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

.NET Framework
Available since 1.1
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