c# - クラスを使用してノードを表す null XML ノードをチェックする

Question

わかりましたので、次のようないくつかのクラスがあります...

/// <summary>
/// 
/// </summary>
public class InsuredOrPrincipal 
{
    XElement self;
    public InsuredOrPrincipal(XElement self) { this.self = self; }

    public GeneralPartyInfo GeneralPartyInfo { get { return _GeneralPartyInfo ?? (_GeneralPartyInfo = new GeneralPartyInfo(self.Element("GeneralPartyInfo"))); } }
    GeneralPartyInfo _GeneralPartyInfo;

    public InsuredOrPrincipalInfo InsuredOrPrincipalInfo 
    { get { return _InsuredOrPrincipalInfo ?? (_InsuredOrPrincipalInfo = new InsuredOrPrincipalInfo(self.Element("InsuredOrPrincipalInfo"))); } }
    InsuredOrPrincipalInfo _InsuredOrPrincipalInfo;
}
/// <summary>
/// 
/// </summary>
public class GeneralPartyInfo
{
    XElement self;
    public GeneralPartyInfo(XElement self) { this.self = self; }

    public NameInfo NameInfo { get { return _NameInfo ?? (_NameInfo = new NameInfo(self.Element("NameInfo"))); } }
    NameInfo _NameInfo;

    public Addr Addr { get { return _Addr ?? (_Addr = new Addr(self.Element("Addr"))); } }
    Addr _Addr;

    public string NameInfoStr
    {
        get { return (string)self.Element("NameInfo"); }
    }
}

テスト is nameInfoStr != null を試し、次のコードブロックで NameInfo != null をテストするだけです

InsuredOrPrincipal[] coInsured = xmlDoc.Root
           .Descendants("InsuredOrPrincipal")
           .Select(x => new InsuredOrPrincipal(x))
           .Where(ip => ip.InsuredOrPrincipalInfo.InsuredOrPrincipalRoleCd == "Coinsured")
           .Where( gp => gp.GeneralPartyInfo.NameInfo != null)
           .ToArray();

または .Where(gp=> gp.GeneralPartyInfo.nameInfoStr != null

XDocument として xmlDoc を使用しています。InsuredOrPrincipal の配列が多数存在する可能性があるため、その配列を呼び出す必要があります。xml ドキュメントに名前ノードが存在するかどうかをテストする必要があります。そうでない場合は、その被保険者または原則をアレイに追加したくないからです。前もって感謝します

ティム

これが役立つ場合、以下はさらに下の追加ノードです

public class NameInfo
{
    XElement self;
    public NameInfo(XElement self) { this.self = self; }

    public PersonName PersonName { get { return _PersonName ?? (_PersonName = new PersonName(self.Element("PersonName"))); } }
    PersonName _PersonName;
}

/// <summary>
/// 
/// </summary>
public class PersonName
{
    XElement self;
    public PersonName(XElement self) { this.self = self; }

    public string Surname
    {
        get { return (string)self.Element("Surname"); }
        set { self.Element("Surname").SetValue(value); }
    }
    public string GivenName
    {
        get { return (string)self.Element("GivenName"); }
        set { self.Element("GivenName").SetValue(value); }
    }
    public string OtherGivenName
    {
        get { return (string)self.Element("OtherGivenName"); }
        set { self.Element("OtherGivenName").SetValue(value); }
    }

    public string NickName
    {
        get { return (string)self.Element("NickName"); }
        set { self.Element("NickName").SetValue(value); }
    }

}

ここにサンプル XML

  InsuredOrPrincipal 
     GeneralPartyInfo 
                 NameInfo 
                 PersonName 
                 Surname NAME  Surname  
                 GivenName FIRST  GivenName  
                 OtherGivenName J  OtherGivenName  
              PersonName 
             TaxIdentity 
                 TaxIdTypeCd SSN  TaxIdTypeCd  
                 TaxId XXX-XX-XXXX  TaxId  
              TaxIdentity 
          NameInfo 
         Addr 
             AddrTypeCd MailingAddress  AddrTypeCd  
             Addr1 1315 STREET DR  Addr1  
             City Picker  City  
             StateProvCd OH  StateProvCd  
             PostalCode 99999  PostalCode  
             CountryCd Fairfield  CountryCd  
          Addr 
      GeneralPartyInfo 
     InsuredOrPrincipalInfo 
         InsuredOrPrincipalRoleCd Insured  InsuredOrPrincipalRoleCd  

      InsuredOrPrincipalInfo 
InsuredOrPrincipal 



  InsuredOrPrincipal
 GeneralPartyInfo 
     NameInfo 
         TaxIdentity 
             TaxIdTypeCd SSN  TaxIdTypeCd  
             TaxId 999-88-5684  TaxId  
          TaxIdentity 
      NameInfo 
  GeneralPartyInfo 
 InsuredOrPrincipalInfo 
     InsuredOrPrincipalRoleCd Coinsured  InsuredOrPrincipalRoleCd  
  InsuredOrPrincipalInfo 
InsuredOrPrincipal 

これがそれを使用する機能です

private void CreateDataRows(XDocument xmlDoc, String Name)
    {
        DataRow fileRow = _ComboDataTable.NewRow();

        InsuredOrPrincipal[] insured = xmlDoc.Root
              .Descendants("InsuredOrPrincipal")
              .Select(x => new InsuredOrPrincipal(x))
              .Where(ip => ip.InsuredOrPrincipalInfo.InsuredOrPrincipalRoleCd == "Insured")
              .ToArray();

        InsuredOrPrincipal[] coInsured = xmlDoc.Root
           .Descendants("InsuredOrPrincipal")
           .Select(x => new InsuredOrPrincipal(x))
           .Where(ip => ip.InsuredOrPrincipalInfo.InsuredOrPrincipalRoleCd == "Coinsured")
           .ToArray();


        _insuredCount = insured.Count() + coInsured.Count(); //count number of elements 

        foreach (var person in insured)
        {
            try
            {
                fileRow["First_Name"] = person.GeneralPartyInfo.NameInfo.PersonName.GivenName;
            }
            catch
            {
                fileRow["First_Name"] = " ";
            }
            try
            {
                fileRow["Last_name"] = person.GeneralPartyInfo.NameInfo.PersonName.Surname;
            }
            catch
            {
                fileRow["Last_name"] = " ";
            }
            fileRow["Address1"] = person.GeneralPartyInfo.Addr.Address1;
            fileRow["City"] = person.GeneralPartyInfo.Addr.City;
            fileRow["State"] = person.GeneralPartyInfo.Addr.State;


            if (person.GeneralPartyInfo.Addr.Address2 != null)
                fileRow["Address2"] = person.GeneralPartyInfo.Addr.Address2;
            else
                fileRow["Address2"] = ' ';

            switch (person.GeneralPartyInfo.Addr.Zip.Length)
            {
                case 5:
                case 7: fileRow["Zip"] = person.GeneralPartyInfo.Addr.Zip.Substring(0, 5);
                    fileRow["Zip4"] = ' ';
                    break;
                case 6: fileRow["Zip"] = '0' + person.GeneralPartyInfo.Addr.Zip.Substring(0, 4);
                    fileRow["Zip4"] = ' ';
                    break;
                case 9: fileRow["Zip"] = person.GeneralPartyInfo.Addr.Zip.Substring(0, 5);
                    fileRow["Zip4"] = person.GeneralPartyInfo.Addr.Zip.Substring(5, 4); break;
                case 10: fileRow["Zip"] = person.GeneralPartyInfo.Addr.Zip.Substring(0, 5);
                    fileRow["Zip4"] = person.GeneralPartyInfo.Addr.Zip.Substring(6, 4); break;
                default: fileRow["Zip"] = "00000"; fileRow["Zip4"] = "0000"; break;
            }
            fileRow["Match_File"] = Name.ToString();
            fileRow["Num_Insured"] = _insuredCount.ToString();
            _ComboDataTable.Rows.Add(fileRow);
        }

        DataRow fileRow2 = _ComboDataTable.NewRow();

        foreach (var person2 in coInsured)
        {
            try
            {
                fileRow2["First_Name"] = person2.GeneralPartyInfo.NameInfo.PersonName.GivenName;
            }
            catch
            {
                fileRow2["First_Name"] = " ";
            }
            try
            {
                fileRow2["Last_name"] = person2.GeneralPartyInfo.NameInfo.PersonName.Surname;
            }
            catch
            {
                fileRow2["Last_name"] = " ";
            }
            try
            {
                fileRow2["Address1"] = person2.GeneralPartyInfo.Addr.Address1;
            }
            catch
            {
                fileRow2["Address1"] = fileRow["Address1"];
            }
            try
            {
                fileRow2["City"] = person2.GeneralPartyInfo.Addr.City;
            }
            catch
            {
                fileRow2["City"] = fileRow["City"];
            }

            try
            {
                fileRow2["State"] = person2.GeneralPartyInfo.Addr.State;
            }
            catch
            {
                fileRow2["State"] = fileRow["State"];
            }

            try
            {
                fileRow2["Address2"] = person2.GeneralPartyInfo.Addr.Address2;
            }
            catch
            {
                fileRow2["Address2"] = fileRow["Address2"];
            }

            try
            {
                switch (person2.GeneralPartyInfo.Addr.Zip.Length)
                {
                    case 5:
                    case 7: fileRow2["Zip"] = person2.GeneralPartyInfo.Addr.Zip.Substring(0, 5);
                        fileRow2["Zip4"] = ' ';
                        break;
                    case 6: fileRow2["Zip"] = '0' + person2.GeneralPartyInfo.Addr.Zip.Substring(0, 4);
                        fileRow2["Zip4"] = ' ';
                        break;
                    case 9: fileRow2["Zip"] = person2.GeneralPartyInfo.Addr.Zip.Substring(0, 5);
                        fileRow2["Zip4"] = person2.GeneralPartyInfo.Addr.Zip.Substring(5, 4); break;
                    case 10: fileRow2["Zip"] = person2.GeneralPartyInfo.Addr.Zip.Substring(0, 5);
                        fileRow2["Zip4"] = person2.GeneralPartyInfo.Addr.Zip.Substring(6, 4); break;
                    default: fileRow2["Zip"] = "00000"; fileRow2["Zip4"] = "0000"; break;
                }
            }
            catch
            {
                fileRow2["Zip"] = fileRow["Zip"];
                fileRow2["Zip4"] = fileRow["Zip4"];
            }

            fileRow2["Match_File"] = Name.ToString();
            fileRow2["Num_Insured"] = _insuredCount.ToString();
            _ComboDataTable.Rows.Add(fileRow2);
        }
    }

あなたが助けてくれることを願っています