I use QRCodeEncoder QRCodeEncoder=new QRCodeEncoder ();
QrCodeEncoder. QRCodeScale=4;
QrCodeEncoder. QRCodeErrorCorrect=qrCodeEncoder. ERROR_CORRECTION. M;

Bitmap bt=qrCodeEncoder. Encode (STR, Encoding. The Default);
Bt. Save (QRurl, ImageFormat. Png);
Qr code is generated after

How to make the black point inside the following dot


Or, how can directly generate dot the qr code, I use the ZXing. DLL and ThoughtWorks QRCode. Codec. The DLL is not dot,

Have drawn a great god explain? The new study

CodePudding user response:

 using System; 
using System.Collections.Generic; 
Using System.Com ponentModel; 
Using System. The Data; 
Using System. Drawing; 
Using System. Linq; 
Using System. The Text; 
Using System. The Threading. The Tasks; 
Using System. Windows. Forms; 

The namespace QRCodeTransfer 
{
Public partial class Form1: Form 
{
Private Bitmap raw_image=(Bitmap) Image. FromFile (" raw_code. PNG "); 
Private Bitmap target_image=null; 
Public _click () 
{
InitializeComponent (); 
} 

Protected override void onl oad (EventArgs e) 
{
Base. The onl oad (e); 
} 

Private void panel1_Paint (object sender, PaintEventArgs e) 
{
Um participant raphics. DrawImage (raw_image, 0, 0, panel1. Width, panel1. Height); 
} 

Private void panel2_Paint (object sender, PaintEventArgs e) 
{
If (target_image!=null) 
{
Um participant raphics. DrawImage (target_image, 0, 0, panel2. Width, panel2. Height); 
} 
} 

Private void button1_Click (object sender, EventArgs e) 
{
//1. The calculated minimum width 
Target_image=new Bitmap (raw_image. Width, raw_image. Height); 
Int x=raw_image. Width/2; 
A Rectangle center_box=new Rectangle (); 
Color center_color=raw_image. GetPixel (x, x); 
Int box_left=0; 
Int box_right=0; 
While (x> 0) 
{
If (raw_image. GetPixel (x, x)!=center_color) 
{
Box_left=x + 1; 
break; 
} 
X -; 
} 
X=raw_image. Width/2; 
While (x & lt; Raw_image. Width) 
{
If (raw_image. GetPixel (x, x)!=center_color) 
{
Box_right=x - 1; 
break; 
} 
X++; 
} 
Int a=box_right box_left + 1; 
Center_box=new Rectangle (box_left box_left, a, a); 

//2. Draw the new qr code 
Using (Graphics g=Graphics. FromImage (target_image)) 
{
Right to Lear (Color. White); 
Int box_count=raw_image. Width/center_box. Width; 
for (int i=0; I & lt; Box_count; I++) 
{
For (int j=0; J & lt; Box_count; J++) 
{
If (raw_image GetPixel (I * center_box in Width, j * center_box Height)==center_color) 
{
A Rectangle box=new Rectangle (I * center_box in Width, j * center_box Height, center_box. Width, center_box. Height); 
G.F illEllipse (Brushes. Black box); 
} 
} 
} 
} 
Target_image. Save (" target. PNG, "System. Drawing. Imaging. ImageFormat. PNG); 

//3. Update interface 
Panel2. Invalidate (); 
} 
} 
}