/// <summary>
/// 表格文字识别
/// </summary>
/// <param name="path"></param>
/// <param name="img"></param>
/// <returns></returns>
public static string FormOcrRequest(string downloadDir, Image img)
{
string url = "https://openapi.youdao.com/ocr_table";
string base64 = WebExt.ImageToBase64(img);
string salt = DateTime.Now.Millisecond.ToString();
string curTime = WebExt.GetTimeSpan();
string sign = ComputeHash(YoudaoKey.AppKey + Truncate(base64) + salt + curTime + YoudaoKey.AppSecret);
string str = string.Format($"q={HttpUtility.UrlEncode(base64)}" +
$"&type=1&appKey={YoudaoKey.AppKey}" +
$"&salt={salt}&sign={sign}&docType=excel&signType=v3&curtime={curTime}");
string result = WebExt.Request(url, null, str);
// 解析json数据
JavaScriptSerializer js = new JavaScriptSerializer();
string json_result = GetDictResult(result);
JsonForm list = js.Deserialize <JsonForm>(json_result);
if (list.tables.Count == 0)
{
throw new Exception("识别失败！");
}
// 将接收到的base64数据写入到xlsx文件
if (downloadDir == null)
{
return(string.Format("识别成功。\r\n返回的Base64编码：\r\n{0}", string.Join("", list.tables.ToArray())));
}
string downloadPath = new SavePath().FormPath + DateTime.Now.ToString("yyyy-MM-dd_HH_mm_ss") + ".xlsx";
if (!Directory.Exists(Path.GetDirectoryName(downloadPath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(downloadPath));
}
using (FileStream fs = new FileStream(downloadPath, FileMode.Create))
{
foreach (var cont in list.tables)
{
byte[] contents = Convert.FromBase64String(cont);
fs.Write(contents, 0, contents.Length);
}
}
return(string.Format("识别成功，已下载到当前程序目录。\r\n返回的Base64编码：\r\n{0}", string.Join("", list.tables.ToArray())));
}
public ActionResult ViewById(int Id)
{
JsonForm form = this.FormRepository.Find(Id) ?? throw new NullReferenceException($"Form not found with Id {Id}");
return(this.View("ViewJsonForm", form));
}