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Attribute::IsDefined Method (Module^, Type^)

.NET Framework (current version)
 

Determines whether any custom attributes of a specified type are applied to a module. Parameters specify the module, and the type of the custom attribute to search for.

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

C#
C++
F#
VB
Copy 
public:
static bool IsDefined(
	Module^ element,
	Type^ attributeType
)

Parameters

element
Type: System.Reflection::Module^

An object derived from the Module class that describes a portable executable file.

attributeType
Type: System::Type^

The type, or a base type, of the custom attribute to search for.

Return Value

Type: System::Boolean

true if a custom attribute of type attributeType is applied to element; otherwise, false.

Exception Condition
ArgumentNullException

element or attributeType is null.

ArgumentException

attributeType is not derived from Attribute.

The ancestors of element are not searched for custom attributes.

The following code example illustrates the use of IsDefined, taking a Module as a parameter.

C#
C++
VB
Copy 
using namespace System;
using namespace System::Diagnostics;

// Add the Debuggable attribute to the module.
[module:Debuggable(true,false)];
namespace IsDef2CS
{
   ref class DemoClass
   {
   public:
      static void Main()
      {

         // Get the class type to access its metadata.
         Type^ clsType = DemoClass::typeid;

         // See if the Debuggable attribute is defined for this module.
         bool isDef = Attribute::IsDefined( clsType->Module, DebuggableAttribute::typeid );

         // Display the result.
         Console::WriteLine( "The Debuggable attribute {0} "
         "defined for Module {1}.", isDef ? (String^)"is" : "is not", clsType->Module->Name );

         // If the attribute is defined, display the JIT settings.
         if ( isDef )
         {

            // Retrieve the attribute itself.
            DebuggableAttribute^ dbgAttr = dynamic_cast<DebuggableAttribute^>(Attribute::GetCustomAttribute( clsType->Module, DebuggableAttribute::typeid ));
            if ( dbgAttr != nullptr )
            {
               Console::WriteLine( "JITTrackingEnabled is {0}.", dbgAttr->IsJITTrackingEnabled );
               Console::WriteLine( "JITOptimizerDisabled is {0}.", dbgAttr->IsJITOptimizerDisabled );
            }
            else
                        Console::WriteLine( "The Debuggable attribute "
            "could not be retrieved." );
         }
      }

   };

}


/*
 * Output:
 * The Debuggable attribute is defined for Module IsDef2CS.exe.
 * JITTrackingEnabled is True.
 * JITOptimizerDisabled is False.
 */

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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