Two-dimensional code generation based on Gma.QrCodeNet.Encoding

Reference: http://www.cnblogs.com/vmyspace/archive/2012/04/05/2433233.html

Today, project needs, references wrote a QR code generation background based on Gma.QrCodeNet.Encoding

Front desk HTML directly request address, fixed image aspect can be used.

Using System;
Using System.Collections.Generic;
Using System.Web;
Using Gma.QrCodeNet.Encoding;
Using System.IO;
Using System.Text;
Using System.Drawing;
Using System.Drawing.Drawing2D;

Namespace Testweb.erweima_test
{
<summary>
Summary description of Handler2
</summary>
public class Handler2:ihttphandler
{

public void ProcessRequest (HttpContext context)
{
if (!string. IsNullOrEmpty (context. request["Qrdata"]. ToString ()))
{
CREATEQR (context);
}

}

public void Createqr (HttpContext context)
{
Qrencoder Qrencoder = new Qrencoder (ErrorCorrectionLevel.H);
QRCode QRCode = new QRCode ();
String data = "0150204whxtl/?type=invate";
String data = context. request["Qrdata"]. ToString ();
String data = context. request.querystring["Qrdata"]. ToString ();
System.Drawing.Bitmap image;
QRCode = Qrencoder.encode (data);
Image = New Bitmap (QrCode.Matrix.Width * 5, QrCode.Matrix.Height * 5);
Image. Setresolution (180f, 180f);
Graphics gdiobj = graphics.fromimage (image);
gdiobj.compositingquality = compositingquality.highquality;
Gdiobj. SmoothingMode = smoothingmode.highquality;
Gdiobj. Interpolationmode = Interpolationmode.highqualitybicubic;
Gdiobj. Pixeloffsetmode = pixeloffsetmode.highquality;

for (Int32 i = 0; i < qrCode.Matrix.Height; i++)
{
for (Int32 j = 0; J < QrCode.Matrix.Width; J + +)
{
if (Qrcode.matrix.internalarray[i, J])
{
Gdiobj. FillRectangle (New SolidBrush (color.black), I * 5, J * 5, 5, 5);
}
}
}

System.Drawing.Imaging.EncoderParameters EP = new System.Drawing.Imaging.EncoderParameters (1);
Ep. Param[0] = new System.Drawing.Imaging.EncoderParameter (System.Drawing.Imaging.Encoder.Quality, 800L);

System.IO.MemoryStream mstream = new System.IO.MemoryStream ();
Image. Save (Mstream, System.Drawing.Imaging.ImageFormat.Png);
Image. Save (Mstream, NULL, EP);
Context. Response.clearcontent ();
Context. Response.ContentType = "Image/png";
Context. Response.BinaryWrite (Mstream.toarray ());


}

public bool IsReusable
{
Get
{
return false;
}
}
}
}

Two-dimensional code generation based on Gma.QrCodeNet.Encoding