C# 生成二维码 例子源码(DotNetBarcode)

输入随便文字或数字可生成二维码
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;namespace QRCode{ public partial class Form1 : Form { DotNetBarcode bc = new DotNetBarcode(); Image printImage; public Form1() { InitializeComponent(); } private void btnCreate_Click(object sender, EventArgs e) { this.ptQRCode.Refresh(); } private void Form1_Load(object sender, EventArgs e) { bc.Type = DotNetBarcode.Types.QRCode; bc.PrintCheckDigitChar = true; } private void ptQRCode_Paint(object sender, PaintEventArgs e) { bc.WriteBar(this.txtContent.Text.Trim(), 0, 0, this.ptQRCode.Width, this.ptQRCode.Height, e.Graphics); } private void btnSave_Click(object sender, EventArgs e) { string url = null; Bitmap b = new Bitmap(ptQRCode.Width, ptQRCode.Height); ptQRCode.DrawToBitmap(b,new Rectangle(0,0,ptQRCode.Width,ptQRCode.Height)); SaveFileDialog sfd=new SaveFileDialog (); sfd.InitialDirectory=Environment.GetFolderPath(Environment.SpecialFolder.MyPictures); sfd.Filter="jpg图片|*.jpg|bmp图片|*.bmp"; sfd.RestoreDirectory=true; sfd.Title="请选择要保存的位置"; if(sfd.ShowDialog()==DialogResult.OK) { url=sfd.FileName; } printImage=b; if(url!=null) { b.Save(url); } } }}