HttpWebRequest.UserAgent プロパティ

.NET Framework クラス ライブラリ リファレンス

HttpWebRequest.UserAgent プロパティ

User-agent HTTP ヘッダーの値を取得または設定します。

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

Visual Basic (宣言)

Public Property UserAgent As
 String

Visual Basic (使用法)

Dim instance As HttpWebRequest
Dim value As String

value = instance.UserAgent

instance.UserAgent = value

C#

public string UserAgent { get;
 set; }

C++

public:
property String^ UserAgent {
    String^ get ();
    void set (String^ value);
}

J#

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

/** @property */
public void set_UserAgent (String value)

JScript

public function get UserAgent
 () : String

public function set UserAgent
 (value : String)

プロパティ値
User-agent HTTP ヘッダーの値。既定値は null 参照 (Visual Basic では Nothing) です。

メモ
このプロパティの値は WebHeaderCollection に格納されます。WebHeaderCollection が設定されている場合、プロパティ値は失われます。

使用例

UserAgent プロパティを設定するコード例を次に示します。

Visual Basic

 ' Create a new 'HttpWebRequest' object to the mentioned URL.
  Dim myHttpWebRequest As HttpWebRequest =
 CType(WebRequest.Create("http://www.contoso.com"),
 HttpWebRequest)
  myHttpWebRequest.UserAgent= ".NET Framework Test Client"
  ' The response object of 'HttpWebRequest' is assigned to a 'HttpWebResponse'
 variable.
  Dim myHttpWebResponse As HttpWebResponse
 = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
  ' Display the contents of the page to the console.
  Dim streamResponse As Stream = myHttpWebResponse.GetResponseStream()
  Dim streamRead As New
 StreamReader(streamResponse)
  Dim readBuff(256) As [Char]
  Dim count As Integer =
 streamRead.Read(readBuff, 0, 256)
  Console.WriteLine(ControlChars.Cr + "The contents of HTML Page
 are :" + ControlChars.Cr)
  While count > 0
      Dim outputData As New
 [String](readBuff, 0, count)
      Console.Write(outputData)
      count = streamRead.Read(readBuff, 0, 256)
  End While
  streamRead.Close()
   streamResponse.Close()    
' Release the response object resources.
   myHttpWebResponse.Close()

C#

// Create a new 'HttpWebRequest' object to the mentioned URL.
HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
myHttpWebRequest.UserAgent=".NET Framework Test Client";
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse'
 variable.
HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();
// Display the contents of the page to the console.
Stream streamResponse=myHttpWebResponse.GetResponseStream();
StreamReader streamRead = new StreamReader( streamResponse );
Char[] readBuff = new Char[256];
int count = streamRead.Read( readBuff, 0, 256 );
Console.WriteLine("\nThe contents of HTML Page are :\n");    
while (count > 0) 
{
    String outputData = new String(readBuff, 0, count);
    Console.Write(outputData);
    count = streamRead.Read(readBuff, 0, 256);
}
// Release the response object resources.
streamRead.Close();
streamResponse.Close();
myHttpWebResponse.Close();

C++

// Create a new 'HttpWebRequest' object to the mentioned URL.
HttpWebRequest^ myHttpWebRequest = (HttpWebRequest^)( WebRequest::Create( "http://www.contoso.com"
 ) );
myHttpWebRequest->UserAgent = ".NET Framework Test Client";
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse'
 variable.
HttpWebResponse^ myHttpWebResponse = (HttpWebResponse^)( myHttpWebRequest->GetResponse()
 );
// Display the contents of the page to the console.
Stream^ streamResponse = myHttpWebResponse->GetResponseStream();
StreamReader^ streamRead = gcnew StreamReader( streamResponse );
array<Char>^ readBuff = gcnew array<Char>(256);
int count = streamRead->Read( readBuff, 0, 256 );
Console::WriteLine( "\nThe contents of HTML Page are :\n" );
while ( count > 0 )
{
   String^ outputData = gcnew String( readBuff,0,count );
   Console::Write( outputData );
   count = streamRead->Read( readBuff, 0, 256 );
}
streamRead->Close();
streamResponse->Close();
myHttpWebResponse->Close();

J#

// Create a new 'HttpWebRequest' object to the mentioned URL.
HttpWebRequest myHttpWebRequest = ((HttpWebRequest)
    WebRequest.Create("http://www.contoso.com"));
myHttpWebRequest.set_UserAgent(".NET Framework Test Client");
// Assign the response object of 'HttpWebRequest' to a 
//'HttpWebResponse' variable.
HttpWebResponse myHttpWebResponse = (HttpWebResponse)
    myHttpWebRequest.GetResponse();
// Display the contents of the page to the console.
Stream streamResponse = myHttpWebResponse.GetResponseStream();
StreamReader streamRead = new StreamReader(streamResponse);
char readBuff[] = new char[256];
int count = streamRead.Read(readBuff, 0, 256);

Console.WriteLine("\nThe contents of HTML Page are :\n");
while (count > 0) {
    String outputData = new String(readBuff, 0, count);
    Console.Write(outputData);
    count = streamRead.Read(readBuff, 0, 256);
}

// Release the response object resources.
streamRead.Close();
streamResponse.Close();
myHttpWebResponse.Close();

プラットフォーム

Windows 98, Windows 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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0、1.0

参照

関連項目
HttpWebRequest クラス
HttpWebRequest メンバ
System.Net 名前空間