発信 HTTP コンテンツ本体へのバイナリ出力を有効にします。
名前空間: System.Web
アセンブリ: System.Web (system.web.dll 内)
構文
'宣言
Public ReadOnly Property OutputStream As Stream
'使用
Dim instance As HttpResponse
Dim value As Stream
value = instance.OutputStream
public Stream OutputStream { get; }
public:
property Stream^ OutputStream {
Stream^ get ();
}
/** @property */
public Stream get_OutputStream ()
public function get OutputStream () : Stream
適用できません。
プロパティ値
発信 HTTP コンテンツ本体の生の内容を表す IO Stream。
例外
| 例外の種類 | 条件 |
|---|---|
OutputStream が使用できません。 |
使用例
このコード例では、Save メソッドを呼び出して、Bitmap オブジェクトを OutputStream プロパティに保存し、イメージを JPEG 形式に変換します。次に、Dispose メソッドを Bitmap オブジェクトと Graphics オブジェクトについて呼び出し、それらのオブジェクトが使用していたリソースを解放します。続いて、Flush メソッドを呼び出し、応答の内容を要求元のクライアントに送信します。
詳細については、HttpResponse クラスのトピックを参照してください。
<%@ Page Language="VB" %>
<%@ import Namespace="System.Drawing" %>
<%@ import Namespace="System.Drawing.Imaging" %>
<%@ import Namespace="System.Drawing.Drawing2D" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Private Sub Page_Load(sender As Object, e As EventArgs)
' Set the page's content type to JPEG files
' and clear all response headers.
Response.ContentType = "image/jpeg"
Response.Clear()
' Buffer response so that page is sent
' after processing is complete.
Response.BufferOutput = True
' Create a font style.
Dim rectangleFont As New Font( _
"Arial", 10, FontStyle.Bold)
' Create integer variables.
Dim height As Integer = 100
Dim width As Integer = 200
' Create a random number generator and create
' variable values based on it.
Dim r As New Random()
Dim x As Integer = r.Next(75)
Dim a As Integer = r.Next(155)
Dim x1 As Integer = r.Next(100)
' Create a bitmap and use it to create a
' Graphics object.
Dim bmp As New Bitmap( _
width, height, PixelFormat.Format24bppRgb)
Dim g As Graphics = Graphics.FromImage(bmp)
g.SmoothingMode = SmoothingMode.AntiAlias
g.Clear(Color.LightGray)
' Use the Graphics object to draw three rectangles.
g.DrawRectangle(Pens.White, 1, 1, width - 3, height - 3)
g.DrawRectangle(Pens.Aquamarine, 2, 2, width - 3, height - 3)
g.DrawRectangle(Pens.Black, 0, 0, width, height)
' Use the Graphics object to write a string
' on the rectangles.
g.DrawString("ASP.NET Samples", rectangleFont, SystemBrushes.WindowText, New PointF(10, 40))
' Apply color to two of the rectangles.
g.FillRectangle( _
New SolidBrush( _
Color.FromArgb(a, 255, 128, 255)), _
x, 20, 100, 50)
g.FillRectangle( _
New LinearGradientBrush( _
New Point(x, 10), _
New Point(x1 + 75, 50 + 30), _
Color.FromArgb(128, 0, 0, 128), _
Color.FromArgb(255, 255, 255, 240)), _
x1, 50, 75, 30)
' Save the bitmap to the response stream and
' convert it to JPEG format.
bmp.Save(Response.OutputStream, ImageFormat.Jpeg)
' Release memory used by the Graphics object
' and the bitmap.
g.Dispose()
bmp.Dispose()
' Send the output to the client.
Response.Flush()
End Sub 'Page_Load
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
</form>
</body>
</html>
<%@ Page Language="C#" %>
<%@ import Namespace="System.Drawing" %>
<%@ import Namespace="System.Drawing.Imaging" %>
<%@ import Namespace="System.Drawing.Drawing2D" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
private void Page_Load(object sender, EventArgs e)
{
// Set the page's content type to JPEG files
// and clear all response headers.
Response.ContentType = "image/jpeg";
Response.Clear();
// Buffer response so that page is sent
// after processing is complete.
Response.BufferOutput = true;
// Create a font style.
Font rectangleFont = new Font(
"Arial", 10, FontStyle.Bold);
// Create integer variables.
int height = 100;
int width = 200;
// Create a random number generator and create
// variable values based on it.
Random r = new Random();
int x = r.Next(75);
int a = r.Next(155);
int x1 = r.Next(100);
// Create a bitmap and use it to create a
// Graphics object.
Bitmap bmp = new Bitmap(
width, height, PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(bmp);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.Clear(Color.LightGray);
// Use the Graphics object to draw three rectangles.
g.DrawRectangle(Pens.White, 1, 1, width-3, height-3);
g.DrawRectangle(Pens.Aquamarine, 2, 2, width-3, height-3);
g.DrawRectangle(Pens.Black, 0, 0, width, height);
// Use the Graphics object to write a string
// on the rectangles.
g.DrawString(
"ASP.NET Samples", rectangleFont,
SystemBrushes.WindowText, new PointF(10, 40));
// Apply color to two of the rectangles.
g.FillRectangle(
new SolidBrush(
Color.FromArgb(a, 255, 128, 255)),
x, 20, 100, 50);
g.FillRectangle(
new LinearGradientBrush(
new Point(x, 10),
new Point(x1 + 75, 50 + 30),
Color.FromArgb(128, 0, 0, 128),
Color.FromArgb(255, 255, 255, 240)),
x1, 50, 75, 30);
// Save the bitmap to the response stream and
// convert it to JPEG format.
bmp.Save(Response.OutputStream, ImageFormat.Jpeg);
// Release memory used by the Graphics object
// and the bitmap.
g.Dispose();
bmp.Dispose();
// Send the output to the client.
Response.Flush();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>ASP.NET Example</title>
</head>
<body>
<form id="form1" runat="server">
</form>
</body>
</html>
プラットフォーム
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
Microsoft .NET Framework 3.0 は Windows Vista,Microsoft Windows XP SP2,および Windows Server 2003 SP1 でサポートされています。
バージョン情報
.NET Framework
サポート対象 : 3.0,2.0,1.1,1.0