C#（VS2017）阿里云云市场发票内容识别demo

C#(VS2017)阿里云云市场发票内容识别demo。需要自行购买（或申请）APP CODE。目前的优惠是：可免费500次。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private const String host = “https://ocrapi-invoice.taobao.com“;
        private const String path = “/ocrservice/invoice“;
        private const String method = “POST“;
        private const String appcode = “eb15f9d262474f998880361a1dbea***“;

        public string ImageTobase64（string FileName）
        {
            String img_file = FileName;
            FileStream fs = new FileStream（img_file FileMode.Open）;
            BinaryReader br = new BinaryReader（fs）;
            byte[] contentBytes = br.ReadBytes（Convert.ToInt32（fs.Length））;
            String base64 = System.Convert.Tobase64String（contentBytes）;
            GC.Collect（）;
            return base64;
        }

        private void button1_Click（object sender EventArgs e）
        {
            try
            {
                OpenFileDialog openFileDialog = new OpenFileDialog（）;
                if （openFileDialog.ShowDialog（） == DialogResult.OK）
                {
                    FileStream fileStream = new FileStream（openFileDialog.FileName FileMode.Open FileAccess.Read）;
                    pictureBox1.Image = Image.FromStream（fileStream）;
                    fileStream.Close（）;
                    fileStream.Dispose（）;

                    label2.Text = openFileDialog.FileName;
                }

                string image_base64 = ImageTobase64（this.label2.Text）;
                String querys = ““;
                String bodys = “{\“img\“:\““ + image_base64 + “\“}“;
                String url = host + path;
                HttpWebRequest httpRequest = null;
                HttpWebResponse httpResponse = null;

                if （0 < querys.Length）
                {
                    url = url + “?“ + querys;
                }

                if （host.Contains（“https://“））
                {
                    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback（CheckValidationResult）;
                    httpRequest = （HttpWebRequest）WebRequest.CreateDefault（new Uri（url））;
                }
                else
                {
                    httpRequest = （HttpWebRequest）WebRequest.Create（url）;
                }
                httpRequest.Method = method;
                httpRequest.Headers.Add（“Authorization“ “APPCODE “ + appcode）;
                //根据API的要求，定义相对应的Content-Type
                httpRequest.ContentType = “application/json; charset=UTF-8“;
  

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-04-12 11:39  WindowsFormsApp1\
     目录           0  2019-04-12 11:39  WindowsFormsApp1\.vs\
     目录           0  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\
     目录           0  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\
     文件       19968  2019-04-12 13:27  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\.suo
     目录           0  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\Server\
     目录           0  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\Server\sqlite3\
     文件           0  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\Server\sqlite3\db.lock
     文件        4096  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\Server\sqlite3\storage.ide
     文件       32768  2019-04-12 11:39  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\Server\sqlite3\storage.ide-shm
     文件     1705712  2019-04-12 13:27  WindowsFormsApp1\.vs\WindowsFormsApp1\v15\Server\sqlite3\storage.ide-wal
     目录           0  2019-04-12 13:26  WindowsFormsApp1\WindowsFormsApp1\
     文件        1146  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1.sln
     文件         189  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\App.config
     目录           0  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\bin\
     目录           0  2019-04-12 11:48  WindowsFormsApp1\WindowsFormsApp1\bin\Debug\
     文件       11776  2019-04-12 12:00  WindowsFormsApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.exe
     文件         189  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.exe.config
     文件       30208  2019-04-12 12:00  WindowsFormsApp1\WindowsFormsApp1\bin\Debug\WindowsFormsApp1.pdb
     文件        4443  2019-04-12 13:26  WindowsFormsApp1\WindowsFormsApp1\Form1.cs
     文件        4374  2019-04-12 11:44  WindowsFormsApp1\WindowsFormsApp1\Form1.Designer.cs
     文件        5817  2019-04-12 11:44  WindowsFormsApp1\WindowsFormsApp1\Form1.resx
     目录           0  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\
     目录           0  2019-04-12 11:48  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\
     文件         831  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        7276  2019-04-12 11:40  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件           0  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
     文件           0  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
     文件           0  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
     目录           0  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\TempPE\
     文件          42  2019-04-12 11:39  WindowsFormsApp1\WindowsFormsApp1\obj\Debug\WindowsFormsApp1.csproj.CoreCompileInputs.cache
............此处省略15个文件信息