FieldInfo.SetValue メソッド

指定したオブジェクトのフィールドに、指定した値を設定します。

オーバーロードの一覧

指定したオブジェクトでサポートされているフィールドの値を設定します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public Sub SetValue(Object, Object)

[C#] public void SetValue(object, object);

[C++] public: void SetValue(Object*, Object*);

[JScript] public function SetValue(Object, Object);

派生クラスによってオーバーライドされた場合、指定したオブジェクトでサポートされているフィールドの値を設定します。

.NET Compact Framework でもサポート。

[Visual Basic] Overloads Public MustOverride Sub SetValue(Object, Object, BindingFlags, Binder, CultureInfo)

[C#] public abstract void SetValue(object, object, BindingFlags, Binder, CultureInfo);

[C++] public: virtual void SetValue(Object*, Object*, BindingFlags, Binder*, CultureInfo*) = 0;

[JScript] public abstract function SetValue(Object, Object, BindingFlags, Binder, CultureInfo);

使用例

[Visual Basic, C#, C++] フィールドの値を設定し、その値を取得して出力し、フィールドを変更して、その変更結果を出力する例を次に示します。

[Visual Basic, C#, C++] メモ   ここでは、SetValue のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。

 
Imports System
Imports System.Reflection
Imports System.Globalization
Imports Microsoft.VisualBasic


Public Class [MyClass]
   Private myString As String
   
   Public Sub New()
      myString = "Old value"
   End Sub 'New
   
   ReadOnly Property GetField() As String
      Get
         Return myString
      End Get
   End Property
End Class '[MyClass]


Public Class FieldInfo_SetValue
   
   Public Shared Sub Main()
      Try
         Dim myObject As New [MyClass]()
         Dim myType As Type = Type.GetType("MyClass")
         Dim myFieldInfo As FieldInfo = myType.GetField("myString", BindingFlags.NonPublic Or BindingFlags.Instance)
         ' Display the string before applying SetValue to the field.
         Console.WriteLine(ControlChars.Lf + "The field value of myString is {0}.", myFieldInfo.GetValue(myObject))
         ' Display the SetValue signature used to set the value of a field.
         Console.WriteLine("Applying SetValue(Object, Object).")
         ' Change the field value using the SetValue method. 
         myFieldInfo.SetValue(myObject, "New value")
         ' Display the string after applying SetValue to the field.
         Console.WriteLine("The field value of mystring is {0}.", myFieldInfo.GetValue(myObject))
         ' Set the field value to its old value. 
         myFieldInfo.SetValue(myObject, "Old value")
         myFieldInfo = myType.GetField("myString", BindingFlags.NonPublic Or BindingFlags.Instance)
         ' Display the string before applying SetValue to the field.
         Console.Write(ControlChars.Lf + "The field value of mystring is {0}." + ControlChars.Lf, myFieldInfo.GetValue(myObject))
         ' Display the SetValue signature used to set the value of a field.
         Console.WriteLine("Applying SetValue(Object, Object, BindingFlags, Binder, CultureInfo).")
         ' Change the field value using the SetValue method. 
         myFieldInfo.SetValue(myObject, "New value", BindingFlags.Public, Nothing, Nothing)
         ' Display the string after applying SetValue to the field.
         Console.WriteLine("The field value of mystring is {0}.", myFieldInfo.GetValue(myObject))
      Catch e As Exception
         ' Any exception generated is displayed. 
         Console.WriteLine("Exception: {0}", e.Message)
      End Try
   End Sub 'Main
End Class 'FieldInfo_SetValue

[C#] 
using System;
using System.Reflection;
using System.Globalization;

public class MyClass
{
    private string myString;
    public MyClass()
    {
        myString = "Old value";
    }
    string GetField
    {
        get
        {
            return myString;
        }
    }
}

public class FieldInfo_SetValue
{
    public static void Main()
    {
        try
        {
            MyClass myObject = new MyClass();
            Type myType = Type.GetType("MyClass");
            FieldInfo myFieldInfo = myType.GetField("myString", BindingFlags.NonPublic | BindingFlags.Instance); 
            // Display the string before applying SetValue to the field.
            Console.WriteLine( "\nThe field value of myString is {0}.", myFieldInfo.GetValue(myObject)); 
            // Display the SetValue signature used to set the value of a field.
            Console.WriteLine( "Applying SetValue(Object, Object).");    
            // Change the field value using the SetValue method. 
            myFieldInfo.SetValue(myObject, "New value"); 
            // Display the string after applying SetValue to the field.
            Console.WriteLine( "The field value of mystring is {0}.", myFieldInfo.GetValue(myObject));
            // Set the field value to its old value. 
            myFieldInfo.SetValue( myObject , "Old value" ); 
            myFieldInfo = myType.GetField("myString", BindingFlags.NonPublic | BindingFlags.Instance); 
            // Display the string before applying SetValue to the field.
            Console.Write( "\nThe field value of mystring is {0}.\n", myFieldInfo.GetValue(myObject)); 
            // Display the SetValue signature used to set the value of a field.
            Console.WriteLine("Applying SetValue(Object, Object, BindingFlags, Binder, CultureInfo)."); 
            // Change the field value using the SetValue method. 
            myFieldInfo.SetValue(myObject, "New value", BindingFlags.Public, null, null);     
            // Display the string after applying SetValue to the field.
            Console.WriteLine( "The field value of mystring is {0}.", myFieldInfo.GetValue(myObject));
        }
        catch( Exception e )
        {
            // Any exception generated is displayed. 
            Console.WriteLine( "Exception: {0}", e.Message );
        }
    }
}

[C++] 
#using <mscorlib.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Globalization;

public __gc class MyClass
{
private:
   String* myString;
public:
   MyClass()
   {
      myString = S"Old value";
   }
   __property String* get_GetField()
   {
      return myString;
   }
};

int main()
{
   try {
      MyClass* myObject = new MyClass();
      Type* myType = Type::GetType(S"MyClass");
      FieldInfo* myFieldInfo = myType->GetField(S"myString", static_cast<BindingFlags>(BindingFlags::NonPublic | BindingFlags::Instance)); 
      // Display the String* before applying SetValue to the field.
      Console::WriteLine(S"\nThe field value of myString is {0}.", myFieldInfo->GetValue(myObject)); 
      // Display the SetValue signature used to set the value of a field.
      Console::WriteLine(S"Applying SetValue(Object, Object).");    
      // Change the field value using the SetValue method. 
      myFieldInfo->SetValue(myObject, S"New value"); 
      // Display the String* after applying SetValue to the field.
      Console::WriteLine(S"The field value of mystring is {0}.", myFieldInfo->GetValue(myObject));
      // Set the field value to its old value. 
      myFieldInfo->SetValue(myObject , S"Old value"); 
      myFieldInfo = myType->GetField(S"myString", static_cast<BindingFlags>(BindingFlags::NonPublic | BindingFlags::Instance)); 
      // Display the String* before applying SetValue to the field.
      Console::Write(S"\nThe field value of mystring is {0}.\n", myFieldInfo->GetValue(myObject)); 
      // Display the SetValue signature used to set the value of a field.
      Console::WriteLine(S"Applying SetValue(Object, Object, BindingFlags, Binder, CultureInfo)."); 
      // Change the field value using the SetValue method. 
      myFieldInfo->SetValue(myObject, S"New value", BindingFlags::Public, 0, 0);     
      // Display the String* after applying SetValue to the field.
      Console::WriteLine(S"The field value of mystring is {0}.", myFieldInfo->GetValue(myObject));
   } catch (Exception* e) {
      // Any exception generated is displayed. 
      Console::WriteLine(S"Exception: {0}", e->Message);
   }
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン をクリックします。

参照

FieldInfo クラス | FieldInfo メンバ | System.Reflection 名前空間