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MissingFieldException Class

The exception that is thrown when there is an attempt to dynamically access a field that does not exist.

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

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
public ref class MissingFieldException : public MissingMemberException, ISerializable
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
public class MissingFieldException extends MissingMemberException implements ISerializable
SerializableAttribute 
ComVisibleAttribute(true) 
public class MissingFieldException extends MissingMemberException implements ISerializable
Not applicable.

Normally a compilation error is generated if code attempts to access a nonexistent member of a class. MissingFieldException is designed to handle cases where an attempt is made to dynamically access a renamed or deleted field of an assembly that is not referenced by its strong name. The MissingFieldException is thrown when code in a dependent assembly attempts to access a missing field in an assembly that was modified.

MissingFieldException uses the HRESULT COR_E_MISSINGFIELD, that has the value 0x80131511.

For a list of initial property values for an instance of MissingFieldException, see the MissingFieldException constructors.

This example shows what happens if you attempt to use reflection to call a method that does not exist and access a field that does not exist. The application recovers by catching the MissingMethodException, MissingFieldException, and MissingMemberException.

using namespace System;
using namespace System::Reflection;

ref class App 
{       
};

int main()
{
    try 
    {
        // Attempt to call a static DoSomething method defined in the App class.
        // However, because the App class does not define this field, 
        // a MissingFieldException is thrown.
        App::typeid->InvokeMember("DoSomething", BindingFlags::Static | 
            BindingFlags::InvokeMethod, nullptr, nullptr, nullptr);
    }
    catch (MissingMethodException^ ex) 
    {
        // Show the user that the DoSomething method cannot be called.
        Console::WriteLine("Unable to call the DoSomething method: {0}", 
            ex->Message);
    }

    try 
    {
        // Attempt to access a static AField field defined in the App class.
        // However, because the App class does not define this field, 
        // a MissingFieldException is thrown.
        App::typeid->InvokeMember("AField", BindingFlags::Static | 
            BindingFlags::SetField, nullptr, nullptr, gcnew array<Object^>{5});
    }
    catch (MissingFieldException^ ex) 
    {
        // Show the user that the AField field cannot be accessed.
        Console::WriteLine("Unable to access the AField field: {0}", 
            ex->Message);
    }

    try 
    {
        // Attempt to access a static AnotherField field defined in the App class.
        // However, because the App class does not define this field, 
        // a MissingFieldException is thrown.
        App::typeid->InvokeMember("AnotherField", BindingFlags::Static | 
            BindingFlags::GetField, nullptr, nullptr, nullptr);
    }        
    catch (MissingMemberException^ ex) 
    {
        // Notice that this code is catching MissingMemberException which is the  
        // base class of MissingMethodException and MissingFieldException.
        // Show the user that the AnotherField field cannot be accessed.
        Console::WriteLine("Unable to access the AnotherField field: {0}", 
            ex->Message);
    }
}
// This code produces the following output.
//
// Unable to call the DoSomething method: Method 'App.DoSomething' not found.
// Unable to access the AField field: Field 'App.AField' not found.
// Unable to access the AnotherField field: Field 'App.AnotherField' not found.

System.Object
   System.Exception
     System.SystemException
       System.MemberAccessException
         System.MissingMemberException
          System.MissingFieldException

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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