Winfrom writing QR code (can upload images)

Write a personal information QR code:

First download a ThoughtWorks.QRCode.dll that generates a QR code (note: Add a reference to the project after downloading it)

Then design a form:

Using System;
Using System.Collections.Generic;
Using System.ComponentModel;
Using System.Data;
Using System.Drawing;
Using System.Linq;
Using System.Text;
Using System.Windows.Forms;
Using ThoughtWorks.QRCode.Codec;

Namespace Two_dimensioncode
{
public partial class Myselfinfo:form
{
Public Myselfinfo ()
{
InitializeComponent ();
}

<summary>
/Get QR Code
</summary>
<param name= "Write" ></param>
<returns></returns>
Public Bitmap GetCode (string write)
{
StringBuilder builder = new StringBuilder ();
Builder. Append ("Name:" + this.txtname);
Qrcodeencoder code = new Qrcodeencoder ();
Code. Qrcodeencodemode = Qrcodeencoder.encode_mode. BYTE;
Code. Qrcodescale = 4;
Code. Qrcodeversion = 8;
Code. Qrcodeerrorcorrect = qrcodeencoder.error_correction. M
Bitmap image = code. Encode (write);
return image;
}

<summary>
Get logo
</summary>
<returns></returns>
Public Bitmap Getlogo ()
{
Bitmap newbmp = new Bitmap ("logo.jpg");//Get Picture Object
Bitmap bmp = New Bitmap (newbmp, 30, 30);//Zoom
return BMP;
}

Private object logoimg;//for storing logo images

<summary>
Generated
</summary>
<param name= "Sender" ></param>
<param name= "E" ></param>
private void Btngenerate_click (object sender, EventArgs e)
{
if (This.txtName.Text.Trim () = "")//Verify that the generated content entered is empty
{
Bitmap Bcode = GetCode (This.txtName.Text);//Get two-dimensional code picture
if (logoimg = = null)
{
Pbcode.image = Bcode;
}
Else
{
Bitmap Blogo = logoimg as bitmap;//get logo image Object
Blogo = new Bitmap (Blogo, 30, 30);//change the size of the picture here we set to 30
int Y = Bcode.height;
int X = Bcode.width;
Point, X/2, Y/2,//logo the image is drawn to the QR code, where the coordinates of the logo are simply calculated.
Graphics g = graphics.fromimage (Bcode);//Create a canvas
G.drawimage (Blogo, point);//Map the logo image to a QR code image
Pbcode.image = Bcode;
}
}
Else
{
MessageBox.Show ("Input generated content! ");
}
}

<summary>
Save
</summary>
<param name= "Sender" ></param>
<param name= "E" ></param>
private void Btnsave_click (object sender, EventArgs e)
{
SaveFileDialog SaveFile = new SaveFileDialog ();//Create Save dialog box
Savefile.filter = "Jpeg|*.jpeg;*.jpg| bitmap file |*.bmp| all Files |*.*";//Set the saved picture format
if (pbcode.image! = null)
{
if (savefile.showdialog () = = DialogResult.OK)
{
string sfilepathname = Savefile.filename;
Image img = pbcode.image;
Img. Save (Sfilepathname);
}
}
Else
{
MessageBox.Show ("Please Sir into two-dimensional code!") ");
}
}

<summary>
Upload logo
</summary>
<param name= "Sender" ></param>
<param name= "E" ></param>
private void Btnlogo_click (object sender, EventArgs e)
{
OpenFileDialog OpenFileDialog = new OpenFileDialog ();//File Open dialog box
Openfiledialog.filter = "Jpeg|*.jpeg;*.jpg| bitmap file |*.bmp| all Files |*.*";//Only open these types of files that we set
if (openfiledialog.showdialog () = = DialogResult.OK)
{
string fileName = Openfiledialog.filename;
Bitmap newbmp = new Bitmap (fileName);
Bitmap bmp = new Bitmap (newbmp);
Pbcode.image = BMP;
logoimg = BMP;
}
}
}
}

Next, create a QRCodeBuilder.cs class:

The code is as follows:

Using System;
Using System.Collections.Generic;
Using System.Linq;
Using System.Text;
Using System.Drawing;
Using System.IO;
Using System.Windows.Forms;
Using ThoughtWorks.QRCode.Codec;

Namespace Tianqrcode
{
public class Qrcodebuilder
{
<summary>
Create two-dimensional code images
</summary>
<param name= "Codestr" > string to generate a QR code </param>
<returns> returns the generated image</returns>
Public Image Createqrcode (string codestr)
{
Qrcodeencoder encoder = new Qrcodeencoder ();
Encoder. Qrcodeencodemode = Qrcodeencoder.encode_mode. byte;//Encoding method
Encoder. Qrcodescale = 4;//Size
Encoder. Qrcodeversion = 8;//Version
Encoder. Qrcodeerrorcorrect = qrcodeencoder.error_correction. M
System.Drawing.Bitmap BP = encoder. Encode (Codestr, encoding.getencoding ("GB2312"));
Image image = BP;

Save two-dimensional code image:
SaveFileDialog SF = new SaveFileDialog ();
sf. Title = "Choose Save File Location";
sf. Filter = "Save Picture (*.jpg) |*.jpg| All Files (*. *) |*.*";
Set default file type display order
sf. FilterIndex = 1;
Save dialog box remembers the last Open Directory
sf. Restoredirectory = true;
if (SF. ShowDialog () = = DialogResult.OK)
{
Get file path
String Localfilepath = SF. Filename.tostring ();
Image. Save (Localfilepath);
}
return image;
}
}
}

Winfrom writing QR code (can upload images)