MissingMemberException Class
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MissingMemberException Class

 

The exception that is thrown when there is an attempt to dynamically access a class member that does not exist or that is not declared as public. If a member in a class library has been removed or renamed, recompile any assemblies that reference that library.

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

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

[SerializableAttribute]
[ComVisibleAttribute(true)]
public class MissingMemberException : MemberAccessException, 
	ISerializable

NameDescription
System_CAPS_pubmethodMissingMemberException()

Initializes a new instance of the MissingMemberException class.

System_CAPS_protmethodMissingMemberException(SerializationInfo, StreamingContext)

Initializes a new instance of the MissingMemberException class with serialized data.

System_CAPS_pubmethodMissingMemberException(String)

Initializes a new instance of the MissingMemberException class with a specified error message.

System_CAPS_pubmethodMissingMemberException(String, Exception)

Initializes a new instance of the MissingMemberException class with a specified error message and a reference to the inner exception that is the root cause of this exception.

System_CAPS_pubmethodMissingMemberException(String, String)

Initializes a new instance of the MissingMemberException class with the specified class name and member name.

NameDescription
System_CAPS_pubpropertyData

Gets a collection of key/value pairs that provide additional user-defined information about the exception.(Inherited from Exception.)

System_CAPS_pubpropertyHelpLink

Gets or sets a link to the help file associated with this exception.(Inherited from Exception.)

System_CAPS_pubpropertyHResult

Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception.(Inherited from Exception.)

System_CAPS_pubpropertyInnerException

Gets the Exception instance that caused the current exception.(Inherited from Exception.)

System_CAPS_pubpropertyMessage

Gets the text string showing the class name, the member name, and the signature of the missing member.(Overrides Exception.Message.)

System_CAPS_pubpropertySource

Gets or sets the name of the application or the object that causes the error.(Inherited from Exception.)

System_CAPS_pubpropertyStackTrace

Gets a string representation of the immediate frames on the call stack.(Inherited from Exception.)

System_CAPS_pubpropertyTargetSite

Gets the method that throws the current exception.(Inherited from Exception.)

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetBaseException()

When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions.(Inherited from Exception.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetObjectData(SerializationInfo, StreamingContext)

Sets the SerializationInfo object with the class name, the member name, the signature of the missing member, and additional exception information.(Overrides Exception.GetObjectData(SerializationInfo, StreamingContext).)

System_CAPS_pubmethodGetType()

Gets the runtime type of the current instance.(Inherited from Exception.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Creates and returns a string representation of the current exception.(Inherited from Exception.)

NameDescription
System_CAPS_protfieldClassName

Holds the class name of the missing member.

System_CAPS_protfieldMemberName

Holds the name of the missing member.

System_CAPS_protfieldSignature

Holds the signature of the missing member.

NameDescription
System_CAPS_proteventSerializeObjectState

Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.(Inherited from Exception.)

Normally a compilation error is generated if the code attempts to access a nonexistent member of a class. MissingMemberException is designed to handle cases where a field or a method is deleted or renamed in one assembly and the change is not reflected in a second assembly. At runtime, MissingMemberException will be thrown when the code in the second assembly attempts to access the missing member in the first assembly.

MissingMemberException is the base class for MissingFieldException and MissingMethodException. In general it is better to use one of the derived classes of MissingMemberException to more precisely indicate the exact nature of the error. Throw a MissingMemberException if you are only interested in capturing the general case of a missing member error.

MissingMemberException uses the HRESULT COR_E_MISSINGMEMBER, that has the value 0x80131512.

For a list of initial property values for an instance of MissingMemberException, see the MissingMemberException 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 System;
using System.Reflection;

public class App
{
    public static void Main()
    {

        try
        {
            // Attempt to call a static DoSomething method defined in the App class.
            // However, because the App class does not define this method,
            // a MissingMethodException is thrown.
            typeof(App).InvokeMember("DoSomething", BindingFlags.Static |
                BindingFlags.InvokeMethod, null, null, null);
        }
        catch (MissingMethodException e)
        {
            // Show the user that the DoSomething method cannot be called.
            Console.WriteLine("Unable to call the DoSomething method: {0}", e.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.
            typeof(App).InvokeMember("AField", BindingFlags.Static | BindingFlags.SetField,
                null, null, new Object[] { 5 });
        }
        catch (MissingFieldException e)
        {
         // Show the user that the AField field cannot be accessed.
         Console.WriteLine("Unable to access the AField field: {0}", e.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.
            typeof(App).InvokeMember("AnotherField", BindingFlags.Static |
                BindingFlags.GetField, null, null, null);
        }
        catch (MissingMemberException e)
        {
         // 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}", e.Message);
        }
    }
}
// This code example 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.

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

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

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