利用Blob进行文件上传的完整步骤

BLOB (binary large object)，二进制大对象，是一个可以存储二进制文件的容器。下面这篇文章主要给大家介绍了关于利用Blob进行文件上传的相关资料，文中通过示例代码介绍的非常详细，需要的朋友可以参考下

转载地址：https://www.jb51.net/article/144934.htm

Blob

Blob，Binary Large Object的缩写，二进制类型的大对象，代表不可改变的原始数据

在计算机中，BLOB常常是数据库中用来存储二进制文件的字段类型。

Blob基本用法

Blob对象

Blob对象指的是字节序列，并且具有size属性，是字节序列中的字节总数，和一个type属性，它是小写的ASCII编码的字符串表示的媒体类型字节序列。

size:以字节数返回字节序列的大小。获取时，符合要求的用户代理必须返回一个FileReader或一个FileReaderSync对象可以读取的总字节数，如果Blob没有要读取的字节，则返回0 。
type:小写的ASCII编码字符串表示媒体类型Blob。在获取时，用户代理必须Blob以小写形式返回a类型的ASCII编码字符串，这样当它转换为字节序列时，它是可解析的MIME类型，或者是空字符串（0字节）如果是类型无法确定。

构造函数

创建blob对象本质上和创建一个其他对象的方式是一样的，都是使用Blob() 的构造函数来进行创建。 构造函数接受两个参数：

第一个参数为一个数据序列，格式可以是ArrayBuffer, ArrayBufferView, Blob, DOMString 
第二个参数是一个包含以下两个属性的对象

  • type: MIME的类型,
  • endings: 决定第一个参数的数据格式。默认值为"transparent"，用于指定包含行结束符n的字符串如何被写入。 它是以下两个值中的一个： "native"，表示行结束符会被更改为适合宿主操作系统文件系统的换行符； "transparent"，表示会保持blob中保存的结束符不变。

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var data1 = "a";

var blob1 = new Blob([data1]);

console.log(blob1); //输出：Blob {size: 1, type: ""}

 

var debug = {hello: "world"};

var blob = new Blob([JSON.stringify(debug, null, 2)],{type : 'application/json'});

console.log(blob) // 输出 Blob(22) {size: 22, type: "application/json"}

 

// 创建一个8字节的ArrayBuffer，在其上创建一个每个数组元素为2字节的“视图”

var abf = new ArrayBuffer(8)

var abv = new Int16Array(abf)

var bolb_ArrayBuffer = new Blob(abv, {type : 'text/plain'})

console.log(bolb_ArrayBuffer) //输出 Blob(4) {size: 4, type: "text/plain"}

slice方法

Blob对象有一个slice方法，返回一个新的 Blob对象，包含了源 Blob对象中指定范围内的数据。

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slice(start, end, contentType)

start： 可选，代表 Blob 里的下标，表示第一个会被会被拷贝进新的 Blob 的字节的起始位置。如果传入的是一个负数，那么这个偏移量将会从数据的末尾从后到前开始计算。
end： 可选，代表的是 Blob 的一个下标，这个下标-1的对应的字节将会是被拷贝进新的Blob 的最后一个字节。如果你传入了一个负数，那么这个偏移量将会从数据的末尾从后到前开始计算。
contentType： 可选，给新的 Blob 赋予一个新的文档类型。这将会把它的 type 属性设为被传入的值。它的默认值是一个空的字符串。

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var data = "abcdef";

var blob1 = new Blob([data]);

var blob2 = blob1.slice(0,3);

 

console.log(blob1); //输出：Blob {size: 6, type: ""}

console.log(blob2); //输出：Blob {size: 3, type: ""}

slice用于文件分片上传

  • 分片与并发结合，将一个大文件分割成多块，并发上传，极大地提高大文件的上传速度。
  • 当网络问题导致传输错误时，只需要重传出错分片，而不是整个文件。另外分片传输能够更加实时的跟踪上传进度。

分片上传逻辑如下：

获取要上传文件的File对象，根据chunk（每片大小）对文件进行分片
通过post方法轮循上传每片文件，其中url中拼接querystring用于描述当前上传的文件信息；post body中存放本次要上传的二进制数据片段
接口每次返回offset，用于执行下次上传

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initUpload();

 

//初始化上传

function initUpload() {

 var chunk = 100 * 1024; //每片大小

 var input = document.getElementById("file"); //input file

 input.onchange = function (e) {

  var file = this.files[0];

  var query = {};

  var chunks = [];

  if (!!file) {

   var start = 0;

   //文件分片

   for (var i = 0; i < Math.ceil(file.size / chunk); i++) {

    var end = start + chunk;

    chunks[i] = file.slice(start , end);

    start = end;

   }

    

   // 采用post方法上传文件

   // url query上拼接以下参数，用于记录上传偏移

   // post body中存放本次要上传的二进制数据

   query = {

    fileSize: file.size,

    dataSize: chunk,

    nextOffset: 0

   }

 

   upload(chunks, query, successPerUpload);

  }

 }

}

 

// 执行上传

function upload(chunks, query, cb) {

 var queryStr = Object.getOwnPropertyNames(query).map(key => {

  return key + "=" + query[key];

 }).join("&");

 var xhr = new XMLHttpRequest();

 xhr.open("POST", "http://xxxx/opload?" + queryStr);

 xhr.overrideMimeType("application/octet-stream");

  

 //获取post body中二进制数据

 var index = Math.floor(query.nextOffset / query.dataSize);

 getFileBinary(chunks[index], function (binary) {

  if (xhr.sendAsBinary) {

   xhr.sendAsBinary(binary);

  } else {

   xhr.send(binary);

  }

 

 });

 

 xhr.onreadystatechange = function (e) {

  if (xhr.readyState === 4) {

   if (xhr.status === 200) {

    var resp = JSON.parse(xhr.responseText);

    // 接口返回nextoffset

    // resp = {

    //  isFinish:false,

    //  offset:100*1024

    // }

    if (typeof cb === "function") {

     cb.call(this, resp, chunks, query)

    }

   }

  }

 }

}

 

// 每片上传成功后执行

function successPerUpload(resp, chunks, query) {

 if (resp.isFinish === true) {

  alert("上传成功");

 } else {

  //未上传完毕

  query.offset = resp.offset;

  upload(chunks, query, successPerUpload);

 }

}

 

// 获取文件二进制数据

function getFileBinary(file, cb) {

 var reader = new FileReader();

 reader.readAsArrayBuffer(file);

 reader.onload = function (e) {

  if (typeof cb === "function") {

   cb.call(this, this.result);

  }

 }

}

Blob URL

blob协议的url使用时就像平时使用的url一样，可以作为图片请求地址，也可以作为文件请求地址。格式：

blob:http://XXX

  • URL.createObjectURL(blob) 创建链接
  • URL.revokeObjectURL(url)

下面是一个下载文件的示例，直接调用即可实现文件下载

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// file是要下载的文件（blob对象）

downloadHandler: function (file, fileName) {

 let link = document.createElement('a')

 link.href = window.URL.createObjectURL(file)

 link.download = fileName

 link.click()

 window.URL.revokeObjectURL(link.href)

 if (navigator.userAgent.indexOf('Firefox') > -1) {

 const a = document.createElement('a')

 a.addEventListener('click', function (e) {

  a.download = fileName

  a.href = URL.createObjectURL(file)

 })

 let e = document.createEvent('MouseEvents')

 e.initEvent('click', false, false)

 a.dispatchEvent(e)

 }

}

在从后台获取的数据接口中把返回类型设置为blob

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var x = new XMLHttpRequest();

x.responseType = 'blob';  // 返回一个blob对象

Blob URL和Data URL的区别

Blob URL

Data URL

  • Blob URL的长度一般比较短，但Data URL因为直接存储图片base64编码后的数据，往往很长，如上图所示，浏览器在显示Data URL时使用了省略号（…）。当显式大图片时，使用Blob URL能获取更好的可能性。
  • Blob URL可以方便的使用XMLHttpRequest获取源数据,比如设置XMLHttpRequest返回的数据类型为blob
  • Blob URL 只能在当前应用内部使用，把Blob URL复制到浏览器的地址栏中，是无法获取数据的。Data URL相比之下，就有很好的移植性，可以在任意浏览器中使用。
> >

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官网

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二、开发完整流程

  • 开通智能化服务
  • 申请创建开发者密钥
  • 创建C#项目编写代码集成Demo

2.1 开通智能化结构服务

首先需要使用自己的账户登录腾讯云官网，然后进入文字识别服务控制台，开通服务。

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2.2 创建开发者密钥

因为需要本地调用接口集成开发，需要申请开发者密钥，然后创建开发者密钥，当然如果之前创建过的话可以忽略该步骤。创建成功之后如下：

特点注意：一定要妥善保护后自己的开发密钥，避免泄露，造成重大财产损失。

2.3 创建项目编写代码集成

首先从网络上找到一张送货单单据，具体如下图：

本次实现的是通过该单据识别图片中的：

收货单位、送货单号、客户地址、送货日期、合计 五个字段

首先打开VS2022创建一个WinForm项目，

项目名称为DeliveryNoteRecognitionDemo，具体创建如下图：

然后点击创建按钮来初始化项目。项目初始化如下：

安装腾讯云文字识别的依赖包依赖包搜索TencentCloudSDK.Ocr

安装成功后如下

接着创建一个送货单识别工具类DeliveryNoteRecognitionUtils.cs

具体代码如下：

  1.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1">
class="hljs-ln-code"> class="hljs-ln-line">using Newtonsoft.Json;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2">
    • class="hljs-ln-code"> class="hljs-ln-line">using Newtonsoft.Json.Linq;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line">using System;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line">using System.Collections.Generic;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">using System.Linq;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line">using System.Text;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line">using System.Threading.Tasks;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="8"> class="hljs-ln-code"> class="hljs-ln-line">using TencentCloud.Common;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="9"> class="hljs-ln-code"> class="hljs-ln-line">using TencentCloud.Common.Profile;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="10"> class="hljs-ln-code"> class="hljs-ln-line">using TencentCloud.Ocr.V20181119;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="11"> class="hljs-ln-code"> class="hljs-ln-line">using TencentCloud.Ocr.V20181119.Models;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="12"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="13"> class="hljs-ln-code"> class="hljs-ln-line">namespace DeliveryNoteRecognitionDemo
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="14"> class="hljs-ln-code"> class="hljs-ln-line">{
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="15"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="16"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="17"> class="hljs-ln-code"> class="hljs-ln-line"> /// <summary>
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="18"> class="hljs-ln-code"> class="hljs-ln-line"> /// 送货单识别工具类
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="19"> class="hljs-ln-code"> class="hljs-ln-line"> /// </summary>
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="20"> class="hljs-ln-code"> class="hljs-ln-line"> public class DeliveryNoteRecognitionUtils
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="21"> class="hljs-ln-code"> class="hljs-ln-line"> {
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="22"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="23"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="24"> class="hljs-ln-code"> class="hljs-ln-line"> /// <summary>
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="25"> class="hljs-ln-code"> class="hljs-ln-line"> ///
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="26"> class="hljs-ln-code"> class="hljs-ln-line"> /// </summary>
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="27"> class="hljs-ln-code"> class="hljs-ln-line"> /// <param name="imageUrl">图片URL</param>
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="28"> class="hljs-ln-code"> class="hljs-ln-line"> /// <returns></returns>
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="29"> class="hljs-ln-code"> class="hljs-ln-line"> public static DeliveryNoteRecognitionModel Get(string imageUrl)
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="30"> class="hljs-ln-code"> class="hljs-ln-line"> {
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="31"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="32"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="33"> class="hljs-ln-code"> class="hljs-ln-line"> // 注意密钥妥善保存，避免泄露，可以放入配置文件或者数据库中
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="34"> class="hljs-ln-code"> class="hljs-ln-line"> Credential cred = new Credential
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="35"> class="hljs-ln-code"> class="hljs-ln-line"> {
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="36"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="37"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="38"> class="hljs-ln-code"> class="hljs-ln-line"> SecretId = "",
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="39"> class="hljs-ln-code"> class="hljs-ln-line"> SecretKey = ""
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="40"> class="hljs-ln-code"> class="hljs-ln-line"> };
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="41"> class="hljs-ln-code"> class="hljs-ln-line"> // 实例化一个client选项，可选的，没有特殊需求可以跳过
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="42"> class="hljs-ln-code"> class="hljs-ln-line"> ClientProfile clientProfile = new ClientProfile();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="43"> class="hljs-ln-code"> class="hljs-ln-line"> // 实例化一个http选项，可选的，没有特殊需求可以跳过
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="44"> class="hljs-ln-code"> class="hljs-ln-line"> HttpProfile httpProfile = new HttpProfile();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="45"> class="hljs-ln-code"> class="hljs-ln-line"> httpProfile.Endpoint = ("ocr.tencentcloudapi.com");
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="46"> class="hljs-ln-code"> class="hljs-ln-line"> clientProfile.HttpProfile = httpProfile;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="47"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="48"> class="hljs-ln-code"> class="hljs-ln-line"> // 实例化要请求产品的client对象,clientProfile是可选的
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="49"> class="hljs-ln-code"> class="hljs-ln-line"> OcrClient client = new OcrClient(cred, "", clientProfile);
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="50"> class="hljs-ln-code"> class="hljs-ln-line"> // 实例化一个请求对象,每个接口都会对应一个request对象
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="51"> class="hljs-ln-code"> class="hljs-ln-line"> SmartStructuralProRequest req = new SmartStructuralProRequest();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="52"> class="hljs-ln-code"> class="hljs-ln-line"> req.ImageUrl = imageUrl;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="53"> class="hljs-ln-code"> class="hljs-ln-line"> req.ItemNames = new string[] { "收货单位", "送货单号", "客户地址", "送货日期", "合计" };
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="54"> class="hljs-ln-code"> class="hljs-ln-line"> DeliveryNoteRecognitionModel deliveryNoteRecognitionModel = new DeliveryNoteRecognitionModel();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="55"> class="hljs-ln-code"> class="hljs-ln-line"> // 返回的resp是一个SmartStructuralProResponse的实例，与请求对象对应
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="56"> class="hljs-ln-code"> class="hljs-ln-line"> SmartStructuralProResponse resp = client.SmartStructuralProSync(req);
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="57"> class="hljs-ln-code"> class="hljs-ln-line"> JObject jsonObject = JObject.Parse(AbstractModel.ToJsonString(resp));
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="58"> class="hljs-ln-code"> class="hljs-ln-line"> deliveryNoteRecognitionModel.Consignee = jsonObject["StructuralList"][0]["Groups"][0]["Lines"][0]["Value"]["AutoContent"].ToString();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="59"> class="hljs-ln-code"> class="hljs-ln-line"> deliveryNoteRecognitionModel.DeliveryNoteNumber = jsonObject["StructuralList"][1]["Groups"][0]["Lines"][0]["Value"]["AutoContent"].ToString();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="60"> class="hljs-ln-code"> class="hljs-ln-line"> deliveryNoteRecognitionModel.CustomerAddress = jsonObject["StructuralList"][2]["Groups"][0]["Lines"][0]["Value"]["AutoContent"].ToString();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="61"> class="hljs-ln-code"> class="hljs-ln-line"> deliveryNoteRecognitionModel.DeliveryDate = jsonObject["StructuralList"][3]["Groups"][0]["Lines"][0]["Value"]["AutoContent"].ToString();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="62"> class="hljs-ln-code"> class="hljs-ln-line"> deliveryNoteRecognitionModel.TotalAmount = jsonObject["StructuralList"][4]["Groups"][0]["Lines"][0]["Value"]["AutoContent"].ToString();
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="63"> class="hljs-ln-code"> class="hljs-ln-line"> return deliveryNoteRecognitionModel;
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="64"> class="hljs-ln-code"> class="hljs-ln-line"> }
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="65"> class="hljs-ln-code"> class="hljs-ln-line"> }
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="66"> class="hljs-ln-code"> class="hljs-ln-line">}
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="67"> class="hljs-ln-code"> class="hljs-ln-line">
  • class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="68"> class="hljs-ln-code"> class="hljs-ln-line">
    • class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}" onclick="hljs.signin(event)"> class="hide-preCode-box">

    说明：因为json结构比较复杂，目前不采用实体的方式获取字段属性，直接根据自定义的字段顺序进行获取，大家注意获取的顺序号。避免出现获取的字段对不上。

    界面设计

    这里增加一个图片地址的输入框和查询按钮，另外增加一个分组展示解析结果，具体后台代码如下：

    1.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">  private void btnSearch_Click(object sender, EventArgs e)
    2.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line">        {
    3.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line">      
    4.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line">      
    5.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">            string url = txtImageUrl.Text;
    6.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line">            if (string.IsNullOrWhiteSpace(url))
    7.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line">            {
    8.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="8"> class="hljs-ln-code"> class="hljs-ln-line">      
    9.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="9"> class="hljs-ln-code"> class="hljs-ln-line">      
    10.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="10"> class="hljs-ln-code"> class="hljs-ln-line">                MessageBox.Show("请输入查询送货单图片的URL");
    11.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="11"> class="hljs-ln-code"> class="hljs-ln-line">            }
    12.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="12"> class="hljs-ln-code"> class="hljs-ln-line">            else
    13.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="13"> class="hljs-ln-code"> class="hljs-ln-line">            {
    14.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="14"> class="hljs-ln-code"> class="hljs-ln-line">      
    15.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="15"> class="hljs-ln-code"> class="hljs-ln-line">      
    16.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="16"> class="hljs-ln-code"> class="hljs-ln-line">                DeliveryNoteRecognitionModel model = DeliveryNoteRecognitionUtils.Get(url);
    17.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="17"> class="hljs-ln-code"> class="hljs-ln-line">                txtAddress.Text = model.CustomerAddress;
    18.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="18"> class="hljs-ln-code"> class="hljs-ln-line">                txtDate.Text = model.DeliveryDate;
    19.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="19"> class="hljs-ln-code"> class="hljs-ln-line">                txtAmount.Text = model.TotalAmount;
    20.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="20"> class="hljs-ln-code"> class="hljs-ln-line">                txtBillNo.Text = model.DeliveryNoteNumber;
    21.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="21"> class="hljs-ln-code"> class="hljs-ln-line">                txtReceiveCompany.Text = model.Consignee;
    22.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="22"> class="hljs-ln-code"> class="hljs-ln-line">            }
    23.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="23"> class="hljs-ln-code"> class="hljs-ln-line">        }
     class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}" onclick="hljs.signin(event)">     class="hide-preCode-box">

    界面效果如下：

    调试获取请求的数据如下图：

    json格式的数据

    返回的json数据

    1.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">{
    2.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line">      
    3.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line">      
    4.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line">	"Angle": 0.0,
    5.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">	"StructuralList": [{
    6.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line">      
    7.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line">      
    8.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="8"> class="hljs-ln-code"> class="hljs-ln-line">		"Groups": [{
    9.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="9"> class="hljs-ln-code"> class="hljs-ln-line">      
    10.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="10"> class="hljs-ln-code"> class="hljs-ln-line">      
    11.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="11"> class="hljs-ln-code"> class="hljs-ln-line">			"Lines": [{
    12.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="12"> class="hljs-ln-code"> class="hljs-ln-line">      
    13.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="13"> class="hljs-ln-code"> class="hljs-ln-line">      
    14.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="14"> class="hljs-ln-code"> class="hljs-ln-line">				"Key": {
    15.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="15"> class="hljs-ln-code"> class="hljs-ln-line">      
    16.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="16"> class="hljs-ln-code"> class="hljs-ln-line">      
    17.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="17"> class="hljs-ln-code"> class="hljs-ln-line">					"AutoName": "收货单位",
    18.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="18"> class="hljs-ln-code"> class="hljs-ln-line">					"ConfigName": null
    19.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="19"> class="hljs-ln-code"> class="hljs-ln-line">				},
    20.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="20"> class="hljs-ln-code"> class="hljs-ln-line">				"Value": {
    21.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="21"> class="hljs-ln-code"> class="hljs-ln-line">      
    22.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="22"> class="hljs-ln-code"> class="hljs-ln-line">      
    23.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="23"> class="hljs-ln-code"> class="hljs-ln-line">					"AutoContent": "源悦餐饮连锁有限公司",
    24.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="24"> class="hljs-ln-code"> class="hljs-ln-line">					"Coord": {
    25.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="25"> class="hljs-ln-code"> class="hljs-ln-line">      
    26.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="26"> class="hljs-ln-code"> class="hljs-ln-line">      
    27.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="27"> class="hljs-ln-code"> class="hljs-ln-line">						"LeftTop": {
    28.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="28"> class="hljs-ln-code"> class="hljs-ln-line">      
    29.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="29"> class="hljs-ln-code"> class="hljs-ln-line">      
    30.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="30"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
    31.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="31"> class="hljs-ln-code"> class="hljs-ln-line">							"Y": 0
    32.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="32"> class="hljs-ln-code"> class="hljs-ln-line">						},
    33.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="33"> class="hljs-ln-code"> class="hljs-ln-line">						"RightTop": {
    34.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="34"> class="hljs-ln-code"> class="hljs-ln-line">      
    35.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="35"> class="hljs-ln-code"> class="hljs-ln-line">      
    36.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="36"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
    37.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="37"> class="hljs-ln-code"> class="hljs-ln-line">							"Y": 0
    38.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="38"> class="hljs-ln-code"> class="hljs-ln-line">						},
    39.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="39"> class="hljs-ln-code"> class="hljs-ln-line">						"RightBottom": {
    40.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="40"> class="hljs-ln-code"> class="hljs-ln-line">      
    41.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="41"> class="hljs-ln-code"> class="hljs-ln-line">      
    42.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="42"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
    43.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="43"> class="hljs-ln-code"> class="hljs-ln-line">							"Y": 0
    44.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="44"> class="hljs-ln-code"> class="hljs-ln-line">						},
    45.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="45"> class="hljs-ln-code"> class="hljs-ln-line">						"LeftBottom": {
    46.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="46"> class="hljs-ln-code"> class="hljs-ln-line">      
    47.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="47"> class="hljs-ln-code"> class="hljs-ln-line">      
    48.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="48"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
    49.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="49"> class="hljs-ln-code"> class="hljs-ln-line">							"Y": 0
    50.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="50"> class="hljs-ln-code"> class="hljs-ln-line">						}
    51.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="51"> class="hljs-ln-code"> class="hljs-ln-line">					}
    52.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="52"> class="hljs-ln-code"> class="hljs-ln-line">				}
    53.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="53"> class="hljs-ln-code"> class="hljs-ln-line">			}]
    54.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="54"> class="hljs-ln-code"> class="hljs-ln-line">		}]
    55.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="55"> class="hljs-ln-code"> class="hljs-ln-line">	}, {
    56.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="56"> class="hljs-ln-code"> class="hljs-ln-line">      
    57.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="57"> class="hljs-ln-code"> class="hljs-ln-line">      
    58.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="58"> class="hljs-ln-code"> class="hljs-ln-line">		"Groups": [{
    59.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="59"> class="hljs-ln-code"> class="hljs-ln-line">      
    60.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="60"> class="hljs-ln-code"> class="hljs-ln-line">      
    61.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="61"> class="hljs-ln-code"> class="hljs-ln-line">			"Lines": [{
    62.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="62"> class="hljs-ln-code"> class="hljs-ln-line">      
    63.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="63"> class="hljs-ln-code"> class="hljs-ln-line">      
    64.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="64"> class="hljs-ln-code"> class="hljs-ln-line">				"Key": {
    65.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="65"> class="hljs-ln-code"> class="hljs-ln-line">      
    66.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="66"> class="hljs-ln-code"> class="hljs-ln-line">      
    67.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="67"> class="hljs-ln-code"> class="hljs-ln-line">					"AutoName": "送货单号",
    68.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="68"> class="hljs-ln-code"> class="hljs-ln-line">					"ConfigName": null
    69.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="69"> class="hljs-ln-code"> class="hljs-ln-line">				},
    70.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="70"> class="hljs-ln-code"> class="hljs-ln-line">				"Value": {
    71.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="71"> class="hljs-ln-code"> class="hljs-ln-line">      
    72.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="72"> class="hljs-ln-code"> class="hljs-ln-line">      
    73.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="73"> class="hljs-ln-code"> class="hljs-ln-line">					"AutoContent": "NO:HT202402040010",
    74.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="74"> class="hljs-ln-code"> class="hljs-ln-line">					"Coord": {
    75.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="75"> class="hljs-ln-code"> class="hljs-ln-line">      
    76.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="76"> class="hljs-ln-code"> class="hljs-ln-line">      
    77.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="77"> class="hljs-ln-code"> class="hljs-ln-line">						"LeftTop": {
    78.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="78"> class="hljs-ln-code"> class="hljs-ln-line">      
    79.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="79"> class="hljs-ln-code"> class="hljs-ln-line">      
    80.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="80"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
    81.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="81"> class="hljs-ln-code"> class="hljs-ln-line">							"Y": 0
    82.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="82"> class="hljs-ln-code"> class="hljs-ln-line">						},
    83.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="83"> class="hljs-ln-code"> class="hljs-ln-line">						"RightTop": {
    84.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="84"> class="hljs-ln-code"> class="hljs-ln-line">      
    85.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="85"> class="hljs-ln-code"> class="hljs-ln-line">      
    86.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="86"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
    87.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="87"> class="hljs-ln-code"> class="hljs-ln-line">							"Y": 0
    88.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="88"> class="hljs-ln-code"> class="hljs-ln-line">						},
    89.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="89"> class="hljs-ln-code"> class="hljs-ln-line">						"RightBottom": {
    90.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="90"> class="hljs-ln-code"> class="hljs-ln-line">      
    91.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="91"> class="hljs-ln-code"> class="hljs-ln-line">      
    92.  class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="92"> class="hljs-ln-code"> class="hljs-ln-line">							"X": 0,
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    最终界面结果如下：

    三、总结

    通过以上案例可以借助腾讯云智能化结构服务轻松提取送货单的信息，大家如果使用的时候只需要把该服务器封装为API接口就可以轻松和其他系统进行对接集成，非常实用。当然也可以通过该案例去集成更多的场景，比如出货、发货标签的识别、质量检验单的识别、出入库单据的识别、客户发票、应付单等等各种单据的识别都可以做到。通过腾讯云智能化结构服务可以大大节省人工录入的准确率和效率。还是非常实用的，感兴趣的朋友可以自己体验一下，大家如果有问题欢迎评论区沟通交流！

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