TypeLoadException.Message プロパティとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

TypeLoadException.Message プロパティ

この例外のエラーメッセージを取得します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Overrides ReadOnly
 Property Message As String

Visual Basic (使用法)

Dim instance As TypeLoadException
Dim value As String

value = instance.Message

public override string Message { get;
 }

C++

public:
virtual property String^ Message {
    String^ get () override;
}

/** @property */
public String get_Message ()

JScript

public override function get
 Message () : String

プロパティ値
エラーメッセージ文字列。

解説

このプロパティは Message をオーバーライドします。エラーメッセージはローカライズする必要があります。

このプロパティは読み取り専用です。

使用例

mscorlib アセンブリから存在しない型の読み込みを試みる例を次に示します。スローされる例外がキャッチされ、TypeName と Message の値が表示されます。このコード例を実行するには、アセンブリの完全限定名を指定する必要があります。アセンブリの完全限定名を取得する方法については、「アセンブリ名」を参照してください。

Visual Basic

Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic

Public Class Example
   Public Shared Sub Main()
      ' Get a reference to the assembly mscorlib.dll, which is always
      ' loaded. (System.String is defined in mscorlib.)
      Dim tString As Type = GetType(String)
      Dim mscorlib As [Assembly] = tString.Assembly

      Try
         Console.WriteLine("Attempting to load a type that does
 not exist in mscorlib.")
         ' The boolean parameter causes an exception to be thrown if
 the
         ' type is not found.
         Dim myType As Type = mscorlib.GetType("System.NonExistentType",
 True)
      Catch ex As TypeLoadException
         ' Display the name of the type that was not found, and the
 
         ' exception message.
         Console.WriteLine("TypeLoadException was caught. Type = '{0}'.",
 _
             ex.TypeName)
         Console.WriteLine("Error Message = '{0}'", ex.Message)
      End Try
   End Sub 
End Class 
'
' This example produces output similar to the following:
'
'Attempting to load a type that does not exist in mscorlib.
'TypeLoadException was caught. Type = 'System.NonExistentType'
'Error Message = 'Could not load type System.NonExistentType from assembly
 mscorl
'ib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089.'

using System;
using System.Reflection;

public class TypeLoadException_TypeName
{
   public static void Main()
 
   {
      // Get a reference to the assembly mscorlib.dll, which is always
      // loaded. (System.String is defined in mscorlib.)
      Assembly mscorlib = typeof(string).Assembly;

      try 
      {
         Console.WriteLine("Attempting to load a type that does not exist in
 mscorlib.");
         // The boolean parameter causes an exception to be thrown if
 the
         // type is not found.
         Type myType = mscorlib.GetType("System.NonExistentType", true);
      }  
      catch (TypeLoadException ex) 
      {
         // Display the name of the type that was not found, and the
 
         // exception message.
         Console.WriteLine("TypeLoadException was caught. Type = '{0}'.",
 
             ex.TypeName);
         Console.WriteLine("Error Message = '{0}'", ex.Message);
      }  
   }
}
/*
 This code example produces output similar to the following:

Attempting to load a type that does not exist in mscorlib.
TypeLoadException was caught. Type = 'System.NonExistentType'
Error Message = 'Could not load type System.NonExistentType from assembly mscorl
ib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089.'
 */

C++

// Load the mscorlib assembly and get a reference to it.
// You must supply the fully qualified assembly name for mscorlib.dll
 here.
Assembly^ myAssembly = Assembly::Load( "Assembly text name, Version, Culture,
 PublicKeyToken" );
try
{
   Console::WriteLine( "This program throws an exception upon successful run."
 );
   
   // Attempt to load a non-existent type from an assembly. 
   Type^ myType = myAssembly->GetType( "System.NonExistentType", true
 );
}
catch ( TypeLoadException^ e ) 
{
   // Display the name of the Type that was not found.
   Console::WriteLine( "TypeLoadException: \n\tError loading the type '{0}'
 from the assembly 'mscorlib'", e->TypeName );
   Console::WriteLine( "\tError Message = {0}", e->Message );
}
catch ( Exception^ e ) 
{
   Console::WriteLine( "Exception: Error Message = {0}", e->Message
 );
}