Slim ASPX: ASHX!
Aspx pages are unbeatable when you design Web forms. But if you want produce, for example, only a dynamic image, or to offer a file to download, but you need the "overhead" that the Web Forms bring (Page events, server-side tags, etc.) are not. There are Generic handler. This ASHX have the file extension: This example writes a vertical text as a jpeg, which could be used for example for a table heading.
Wednesday, September 30, 2009
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a \u0026lt;% @ Language = WebHandler "C #" Class = "sample handler %>
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using System;
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using
System.Web;
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using System.Drawing;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Drawing.Drawing2D;
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public
class
Handler : IHttpHandler
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{
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public
void ProcessRequest(HttpContext context)
12 {
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12 {
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string text = context.Request.QueryString[ "text"
];
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16 15
System.IO. MemoryStream memStream = new
System.IO.
System.IO.
MemoryStream ();
17 Bitmap bitmap = new Bitmap(100, 20, PixelFormat.Format32bppRgb);
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Graphics graphic = Graphics.FromImage(bitmap);
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21 graphic.SmoothingMode = SmoothingMode.HighSpeed;
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21 graphic.SmoothingMode = SmoothingMode.HighSpeed;
22 graphic.Clear(Color.White);
23 graphic.DrawString(text, new Font( "Arial"
, 12), Brushes.Black, 0, 0);
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bitmap.RotateFlip (RotateFlipType.Rotate270FlipNone);
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bitmap.Save (memStream, ImageFormat.Jpeg);
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28 context.Response.ContentType = "image/jpeg" ;
29 context.Response.BinaryWrite(memStream.ToArray());
30 context.Response.End();
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32 }
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public
bool
public
bool
IsReusable
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{
36 get
37 {
38 return
false ;
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false ;
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}
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} 41
} The result of the example is an image. And all this without the Events Page and the Page LifeCycle of ASPX.
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