.NET CSV 上传器允许空值

Question

我组装了一个 CSV 导入器，我认为它可以工作，但我收到此错误，我如何允许此列为空，以便在将其添加到 table 时自动设置 ID ？我试过：

csv.Configuration.WillThrowOnMissingFields = false;

但它无法识别，这是我在尝试上传时遇到的错误：

CsvHelper.ValidationException: 'Header matching ['ID'] names at index 0 was not found. If you are expecting some headers to be missing and want to ignore this validation, set the configuration HeaderValidated to null. You can also change the functionality to do something else, like logging the issue.'

    [HttpPost]
    [ActionName("CreateBulk")]
    public ActionResult CreateBulkUpload()
    {
        object db;
        var file = Request.Files["attachmentcsv"];
        using (var csv = new CsvReader(new StreamReader(file.InputStream), true))
        {
            var records = csv.GetRecords<Client>().ToList();
            foreach (var item in records)
            {
                var strip = item.homePage.Replace("https://www.", "").Replace("http://www.", "")
                    .Replace("https://", "").Replace("http://", "").Replace("www.", "");

                string[] URLtests =
                    {"https://www." + strip, "http://www." + strip, "https://" + strip, "http://" + strip};

                string[] Metric = MajesticFunctions.MajesticChecker(URLtests);
                var userId = User.Identity.GetHashCode();
                var UserTableID = 1;

                var newclient = new Client

                {
                    clientN = item.clientN,
                    homePage = Metric[0],
                    clientEmail = item.clientEmail,
                    monthlyQuota = item.monthlyQuota,
                    TrustFlow = Int32.Parse(Metric[1]),
                    CitationFlow = Int32.Parse(Metric[2]),
                    RI = Int32.Parse(Metric[3]),
                    MJTopicsID = item.MJTopicsID,
                    UserTableID = UserTableID
                };
                ViewBag.newdomain = newclient;
                return RedirectToAction("Index");
            }
        }
        return RedirectToAction("Index");

    }

Answer 1

您是否尝试了错误消息中提到的建议？像这样？

 csv.configuration.HeaderValidated = null;

Answer 2

确保包括这两行：

csv.Configuration.HeaderValidated = null;

csv.Configuration.MissingFieldFound = null;

Answer 3

The developer made some breaking changes this year，因此已接受的答案将不再有效。

相反，您必须提前创建一个配置对象并将其注入到构造函数中：

var config = new CsvConfiguration(CultureInfo.InvariantCulture)
  {
     HeaderValidated = null
  };
using (var reader = new StreamReader(file))
using (var csv = new CsvReader(reader, config))

.NET CSV 上传器允许空值

.NET CSV Uploader Allow Nulls

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csvhelper