Question

以下是我遇到问题的方法：

public static void main(String[] args){
        List<String> parole = Arrays.asList("Lambda ", "expressions ", "are ", "cool ");
Predicate <String> findAre= s->"are ".equals(s);         
        parole.removeIf(findAre);
        parole.forEach( System.out::println);
            }

我试图上传一个xml文件，然后解析成一个SQL表（Sql DataTable，名为DmgRegister），我是ASP.Net的初学者，如果代码看起来像意大利面条那么请不要使用。

[HttpPost]
    public async Task<IActionResult> XmlPage(IFormFile xmlFile)
    { 
      var uploads = hostingEnvironment.WebRootPath;
        if (xmlFile.ContentType.Equals("application/xml") || xmlFile.ContentType.Equals("text/xml"))
        {
            try
            {
                using (var fileStream = new FileStream(Path.Combine(uploads, xmlFile.FileName), FileMode.Create))
                {
                    await xmlFile.CopyToAsync(fileStream);
                    XDocument xDoc = XDocument.Load(fileStream);
                    List<DmgRegister> dmgRegistterList = xDoc.Descendants("Claim").Select(dmgReg =>
                    new DmgRegister
                    {
                        Uwyear = dmgReg.Element("UWYear").Value,
                        ClaimNo = dmgReg.Element("ClaimNo").Value,
                        PolicyNo = dmgReg.Element("PolicyNo").Value,
                        PolicyName = dmgReg.Element("PolicyHolder").Value,
                        Address1 = dmgReg.Element("Address1").Value,
                        Address2 = dmgReg.Element("Addresstype").Value,
                        PostalLocation = dmgReg.Element("City").Value,
                        Country = dmgReg.Element("Country").Value,
                        PostalCode = dmgReg.Element("Postalzone").Value
                    }).ToList();
                    context.SaveXmlToDb(dmgRegistterList);

            }
            catch
            {
//Here where i come when i try to upload and parse the data
                ViewBag.Error = "Converting fail";
                return View("Export");
            }
        }
        else
        {
            ViewBag.Error = "Uploading fail";
            return View("Index");
        }
        return View();
    }

现在我正在尝试从XML绑定数据并将其保存到DataTable的模型

       // SaveXmlToDb method in context 
          foreach (var item in dmgRegistterList)
            {
                DmgRegister.Add(item);
            }
        SaveChanges();
                }

以下是我尝试上传的Xml示例

 [Serializable]
[XmlRoot("Claims")]
public class Claim
{
    [XmlElement("ClientName")]
    public string ClientName { get; set; }
    [XmlElement("UWYear")]
    public string Uwyear { get; set; }
    [XmlElement("AgreementNo")]
    public string AgreementNo { get; set; }
    [XmlElement("BusinessType")]
    public string BusinessType { get; set; }
    [XmlElement("PeriodStart")]
    public DateTime? PeriodStart { get; set; }
    [XmlElement("PeriodEnd")]
    public DateTime? PeriodEnd { get; set; }
    [XmlElement("PolicyNo")]
    public string PolicyNo { get; set; }
    [XmlElement("PolicyHolder")]
    public string PolicyName { get; set; }
    [XmlElement("DateOfLoss")]
    public DateTime? DateOfLoss { get; set; }
    [XmlElement("ClaimNo")]
    public string ClaimNo { get; set; }
    [XmlElement("ClaimantName")]
    public string ClaimantName { get; set; }
    [XmlElement("ClaimedInsured")]
    public string ClaimedInsured { get; set; }
    [XmlElement("ReportDate")]
    public DateTime? ReportDate { get; set; }
    [XmlElement("CountryOfRisk")]
    public string CountryOfRisk { get; set; }
    [XmlElement("CountryOfLoss")]
    public string CountryOfLoss { get; set; }
    [XmlElement("TypeOfLoss")]
    public string TypeOfLoss { get; set; }
    [XmlElement("InsuranceCoverage")]
    public string InsuranceCoverage { get; set; }
    [XmlElement("LineOfBuisnessNo")]
    public int? LineOfBuisnessNo { get; set; }
    [XmlElement("LineOfBuisnessName")]
    public string LineOfBuisnessName { get; set; }
    [XmlElement("ClassOfBuisnessNo")]
    public int? ClassOfBuisnessNo { get; set; }
    [XmlElement("ClassOfBuisnessName")]
    public string ClassOfBuisnessName { get; set; }
    [XmlElement("CaptiveShare")]
    public int? CaptiveShare { get; set; }
    [XmlElement("OriginalCurrency")]
    public string OriginalCurrency { get; set; }
    [XmlElement("PaymentCurrency")]
    public string PaidInCurrency { get; set; }
    [XmlElement("TotalIncurredCaptiveShare")]
    public decimal? TotalIncurredCaptiveShare { get; set; }
    [XmlElement("PaidThisPeriod")]
    public decimal? PaidThisPeriod { get; set; }
    [XmlElement("PeriodDate")]
    public DateTime? PeriodDate { get; set; }
    [XmlElement("PaymentDate")]
    public DateTime? PaymentDate { get; set; }
    [XmlElement("TotalPaidCaptiveShare")]
    public decimal? TotalPaidCaptiveShare { get; set; }
    [XmlElement("RemainingReserveCaptiveShare")]
    public decimal? RemainingReserveCaptiveShare { get; set; }
    [XmlElement("Deductible")]
    public string Deductible { get; set; }
    [XmlElement("Recovery")]
    public string Recovery { get; set; }
    [XmlElement("LocationAdress")]
    public string LocationAdress { get; set; }
    [XmlElement("Address1")]
    public string Address1 { get; set; }
    [XmlElement("Addresstype")]
    public string Address2 { get; set; }
    [XmlElement("Postalzone")]
    public string PostalCode { get; set; }
    [XmlElement("City")]
    public string PostalLocation { get; set; }
    [XmlElement("Country")]
    public string Country { get; set; }
    [XmlElement("GeograficalDiversification")]
    public string GeograficalDiversification { get; set; }
    [XmlElement("Cause")]
    public string Cause { get; set; }
    [XmlElement("Status")]
    public string Status { get; set; }
    [XmlElement("CloseDate")]
    public DateTime? CloseDate { get; set; }
    [XmlElement("DevelopmentYear")]
    public string DevelopmentYear { get; set; }
    [XmlElement("TotalIncurredInsurerShare")]
    public decimal? TotalIncurredInsurerShare { get; set; }
    [XmlElement("TotalPaidInsurerShare")]
    public decimal? TotalPaidInsurerShare { get; set; }
    [XmlElement("RemainingReserveInsurerShare")]
    public decimal? RemainingReserveInsurerShare { get; set; }

}
[Serializable()]
[XmlRoot("Claims")]
public class Claims
{
    [XmlArray("Claims")]
    [XmlArrayItem("Claim", typeof(Claim))]
    public Claim[] Claim { get; set; }
}

我甚至尝试将其从XML转换为JSON，但它会跳转到捕捉

<ns0:Claims>
<Claim>
<ClaimNo>LL0000110262</ClaimNo>
<PolicyNo>LP0000004481</PolicyNo>
<PolicyHolder>NCC Rakennus Oy</PolicyHolder>
<AddressId>1</AddressId>
<Address1>Example Street 1</Address1>
<Addresstype>LocationOfLoss</Addresstype>
<City>Helsinki</City>
<Country>FI</Country>
<Postalzone>12345</Postalzone>
<UWYear>2015</UWYear>
<PeriodStart>2015-01-01</PeriodStart>
<PeriodEnd>2015-12-31</PeriodEnd>
<DateOfLoss>2015-07-15</DateOfLoss>
<ReportDate/>
<StatusAsPer>2015-12-31</StatusAsPer>
<Coverage>?</Coverage>
<TypeOfLoss>Leakage</TypeOfLoss>
<OriginalCurrency>EUR</OriginalCurrency>
<PaymentCurrency>EUR</PaymentCurrency>
<TotalReservesOrigCurr>0.00</TotalReservesOrigCurr>
<TotalPaymentOrigCurr>0.00</TotalPaymentOrigCurr>
<DeductibleOrigCurr>85000.00</DeductibleOrigCurr>
<TotalAmountOfClaimOrigCurr>3680.00</TotalAmountOfClaimOrigCurr>
<Status>Active</Status>
</Claim>
</ns0:Claims>

Answer 1

鉴于您正在获取“Root元素缺失”，这看起来像是您的映射问题。

[XmlRoot("Claims")]不会映射到<ns0:Claims>。

尝试更新XML，以便将roots元素设置为<Claims></Claims>而不是

<ns0:Claims></ns0:Claims>。

如果这样可以解决问题，那么您可以更改XML或更新类中的属性，使其看起来像这样。

[XmlRoot("ns0:Claims")]。

Answer 2

很多CountZero，在我第一个问题之后真的很感激，仍然有问题，但现在一切正常，控制器中的方法

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      enim ac dui. Donec non enim in turpis pulvinar facilisis
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上下文中的SaveXmlToDb方法

       public async Task<IActionResult> XmlPage(IFormFile xmlFile)
    {
        var uploads = hostingEnvironment.WebRootPath;
        var filePath = Path.Combine(uploads, xmlFile.FileName).ToString();

        if (xmlFile.ContentType.Equals("application/xml") || xmlFile.ContentType.Equals("text/xml"))
        {
            try
            {
                using (var fileStream = new FileStream(filePath, FileMode.Create))
                {
                    await xmlFile.CopyToAsync(fileStream);
                    fileStream.Dispose();
                    XDocument xDoc = XDocument.Load(filePath);
                    List<DmgRegisterVM> dmgRegistterList = xDoc.Descendants("Claim").Select(dmgReg =>
                    new DmgRegisterVM
                    {
                        Uwyear = dmgReg.Element("UWYear").Value,
                        ClaimNo = dmgReg.Element("ClaimNo").Value,
                        PolicyNo = dmgReg.Element("PolicyNo").Value,
                        PolicyName = dmgReg.Element("PolicyHolder").Value,
                        Address1 = dmgReg.Element("Address1").Value,
                        Address2 = dmgReg.Element("Addresstype").Value,
                        PostalLocation = dmgReg.Element("City").Value,
                        Country = dmgReg.Element("Country").Value,
                        PostalCode = dmgReg.Element("Postalzone").Value
                    }).ToList();
                    context.SaveXmlToDb(dmgRegistterList);
                }
            }
            catch(Exception e)
            {
                    ViewBag.Error = "Converting fail";
            }
        }
        else
        {
            ViewBag.Error = "Uploading fail";
        }
        return View("Index");
    }

最后是Claim类（我有XML元素）

        public void SaveXmlToDb(List<DmgRegisterVM> dmgRegList)
    {
        //from list to database
        foreach (var item in dmgRegList)
        {
            var model = Mapper.Map<DmgRegister>(item);
            DmgRegister.Add(model);
            SaveChanges();         
        }
    }

从Xml FIle读取到现有的dataTable C＃ASP.NET Core

2 个答案: