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   源码介绍

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选择身份证 正面 和反面，识别身份证中的 姓名、性别、民族、出生、地址、号码、签发机关、有效期等

示例中的身份证原图如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
using Tesseract;
namespace ICRS
{
    public partial class Form1 : Form
    {
        private string appKey="mfM9NFqxwxWbMcIbRnYgUMTY";
        private string appSec = "2EXBhpDZueL7kXQd1GI8PNrSb9S9q8j1";
        private string token = "24.9d44ca2865c47e0e4487f825a8488b58.2592000.1566021773.282335-16835038";
        private string pageStr = "";
        public Form1()
        {
            InitializeComponent();
            pageStr = this.Text;
            GetAcctoken();
        }

        /// <summary>
        /// 获取token
        /// </summary>
        private void GetAcctoken()
        {
            this.Text = pageStr   "（初始化...）";
            var url = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id={0}&client_secret={1}";
            url = string.Format(url, appKey, appSec);
            var res = Common.GetResponse(url);
            var obj = Common.DeserializeObject(res);
            if(obj==null)
            {
                this.Text = pageStr;
                MessageBox.Show("网络联接失败", "错误18066831920");
                return;
            }
            if(obj["access_token"] ==null)
            {
                this.Text = pageStr;
                MessageBox.Show("网络联接失败", "错误18066831920");
                return;
            }
            token = obj["access_token"].ToString();
            this.Text = pageStr;
        }

        private string ImgToBase64String(Bitmap bitMap)
        {
            var imgData = (string)null;
            using (var ms = new System.IO.MemoryStream())
            {
                //将图片对象转为内存流
                bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                //将内存流转为字节数字
                var subf = ms.GetBuffer();
                imgData = Convert.ToBase64String(subf);
            }
            return imgData;
        }

        /// <summary>
        /// 上传身份证正面照片
        /// </summary>
        private void label9_Click(object sender, EventArgs e)
        {
            try
            {
                var ofd = new OpenFileDialog();
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    this.Text = pageStr   "（处理中...）";
                    this.pictureBox1.ImageLocation = ofd.FileName;
                    this.label9.Visible = false;
                    var strbaser64 = ImgToBase64String(new Bitmap(ofd.FileName)); // 图片的base64编码
                    var host = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token="   token;
                    var res = Common.PostResponse(host, "id_card_side=front&image="   System.Web.HttpUtility.UrlEncode(strbaser64, System.Text.Encoding.UTF8));
                    var obj = Common.DeserializeObject(res);
                    if (obj == null)
                    {
                        this.Text = pageStr;
                        MessageBox.Show("处理失败", "错误18066831920");
                        return;
                    }
                    if (obj["words_result"] == null)
                    {
                        this.Text = pageStr;
                        MessageBox.Show("处理失败", "错误18066831920");
                        return;
                    }
                    if (obj["words_result"]["姓名"] != null)
                    {
                        this.txtName.Text = obj["words_result"]["姓名"]["words"].ToString();
                    }
                    if (obj["words_result"]["性别"] != null)
                    {
                        this.txtSex.Text = obj["words_result"]["性别"]["words"].ToString();
                    }
                    if (obj["words_result"]["民族"] != null)
                    {
                        this.txtNation.Text = obj["words_result"]["民族"]["words"].ToString();
                    }
                    if (obj["words_result"]["出生"] != null)
                    {
                        this.txtBirsday.Text = DateTime.ParseExact(obj["words_result"]["出生"]["words"].ToString(), "yyyyMMdd", null).ToString("yyyy年MM月dd日");
                    }
                    if (obj["words_result"]["住址"] != null)
                    {
                        this.txtAddress.Text = obj["words_result"]["住址"]["words"].ToString();
                    }
                    if (obj["words_result"]["公民身份号码"] != null)
                    {
                        this.txtCardNo.Text = obj["words_result"]["公民身份号码"]["words"].ToString();
                    }
                    this.Text = pageStr;
                }
            }
            catch
            {
                MessageBox.Show("请选择正确的照片!", "提示18066831920");
            }
        }

        /// <summary>
        /// 上传身份证背面照片
        /// </summary>
        private void label10_Click(object sender, EventArgs e)
        {
            try
            {
                var ofd = new OpenFileDialog();
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    this.Text = pageStr   "（处理中...）";
                    this.pictureBox2.ImageLocation = ofd.FileName;
                    this.label10.Visible = false;

                    var strbaser64 = ImgToBase64String(new Bitmap(ofd.FileName)); // 图片的base64编码
                    var host = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard?access_token="   token;
                    var res = Common.PostResponse(host, "id_card_side=back&image="   System.Web.HttpUtility.UrlEncode(strbaser64, System.Text.Encoding.UTF8));
                    var obj = Common.DeserializeObject(res);
                    if (obj == null)
                    {
                        this.Text = pageStr;
                        MessageBox.Show("处理失败", "错误18066831920");
                        return;
                    }
                    if (obj["words_result"] == null)
                    {
                        this.Text = pageStr;
                        MessageBox.Show("处理失败", "错误18066831920");
                        return;
                    }
                    if (obj["words_result"]["失效日期"] != null && obj["words_result"]["签发日期"] != null)
                    {
                        this.txtValidDate.Text = DateTime.ParseExact(obj["words_result"]["签发日期"]["words"].ToString(), "yyyyMMdd", null).ToString("yyyy.MM.dd")   "至"   DateTime.ParseExact(obj["words_result"]["失效日期"]["words"].ToString(), "yyyyMMdd", null).ToString("yyyy.MM.dd");
                    }
                    if (obj["words_result"]["签发机关"] != null)
                    {
                        this.txtFzjg.Text = obj["words_result"]["签发机关"]["words"].ToString();
                    }
                    this.Text = pageStr;
                }
            }
            catch
            {
                MessageBox.Show("请选择正确的照片!", "提示18066831920");
            }
        }
    }
}