Using Linq to pull from IEnumerable and store in data table

Question

I have a datatable that looks like the following

public static DataTable SetColumnHeaders(DataTable KeyDataTable)
{
    KeyDataTable.Columns.Add(\"First_Name         


        

Answer 1

This is what I have so far.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using System.IO;
using System.Data;

namespace xmlCustomReformat
{
    class importXml
    {
        public DataTable _ComboDataTable;
        public void ExportAutoToText()
        {
            DirectoryInfo AutoDir = new DirectoryInfo(FilePrep.AutoDirectory);

            CreateDataTable(); // set column headers

           foreach (FileInfo File in AutoDir.GetFiles())
           {
               DataRow fileRow = _ComboDataTable.NewRow();
               XDocument xmlDoc = XDocument.Load(AutoDir + File.Name);

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

               foreach (var person in insured)
               {
                   fileRow["First_Name"] = person.GeneralPartyInfo.NameInfo.PersonName.GivenName;
                   fileRow["Last_name"] = person.GeneralPartyInfo.NameInfo.PersonName.Surname;
                   fileRow["Address1"] = person.GeneralPartyInfo.Addr.Address1;
                   fileRow["City"] = person.GeneralPartyInfo.Addr.City;
                   fileRow["State"] = person.GeneralPartyInfo.Addr.State;
                   fileRow["Zip"] = person.GeneralPartyInfo.Addr.Zip;
                   fileRow["Address2"] = " ";
                   fileRow["Zip4"] = " ";
                   fileRow["Match_File"] = File.Name.ToString();
                   _ComboDataTable.Rows.Add(fileRow);
               }
           }
        }

        public void ExportHomeToText()
        {
            DirectoryInfo HomeDir = new DirectoryInfo(FilePrep.HomeDirectory);

            foreach (FileInfo File in HomeDir.GetFiles())
            {
                DataRow fileRow = _ComboDataTable.NewRow();
                XDocument xmlDoc = XDocument.Load(HomeDir + File.Name);

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

                foreach (var person in insured)
                {
                    fileRow["First_Name"] = person.GeneralPartyInfo.NameInfo.PersonName.GivenName;
                    fileRow["Last_name"] = person.GeneralPartyInfo.NameInfo.PersonName.Surname;
                    fileRow["Address1"] = person.GeneralPartyInfo.Addr.Address1;
                    fileRow["City"] = person.GeneralPartyInfo.Addr.City;
                    fileRow["State"] = person.GeneralPartyInfo.Addr.State;
                    fileRow["Zip"] = person.GeneralPartyInfo.Addr.Zip;
                    fileRow["Address2"] = " ";
                    fileRow["Zip4"] = " ";
                    fileRow["Match_File"] = File.Name.ToString();
                    _ComboDataTable.Rows.Add(fileRow);
                }
            }
            ExportDataTable.Write(_ComboDataTable, HomeDir.Parent.FullName.ToString());
        }

        public void CreateDataTable()
        {
            _ComboDataTable = new DataTable();

            _ComboDataTable.Columns.Add("First_Name", typeof(string));
            _ComboDataTable.Columns.Add("Last_Name", typeof(string));
            _ComboDataTable.Columns.Add("Address1", typeof(string));
            _ComboDataTable.Columns.Add("Address2", typeof(string));
            _ComboDataTable.Columns.Add("City", typeof(string));
            _ComboDataTable.Columns.Add("State", typeof(string));
            _ComboDataTable.Columns.Add("Zip", typeof(string));
            _ComboDataTable.Columns.Add("Zip4", typeof(string));
            _ComboDataTable.Columns.Add("Match_File", typeof(string));  
        }

    }
}

The class Comp looks like this.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
namespace xmlCustomReformat
{
    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;
    }

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

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

    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;
    }

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

        public string Address1
        {
            get { return (string)self.Element("Addr1"); }
        }
        public string City
        {
            get { return (string)self.Element("City"); }
        }
        public string State
        {
            get { return (string)self.Element("StateProvCd"); }
        }
        public string Zip
        {
            get { return (string)self.Element("PostalCode"); }
        }
    }

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

        public string Surname 
        { 
             get { return (string)self.Element("Surname"); } 
        }
        public string GivenName 
        {
            get { return (string)self.Element("GivenName"); }
        }
    }
}

And Of course my export back to a text file for my append.

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.IO;
using System.Windows.Forms;

namespace xmlCustomReformat
{
    public static class ExportDataTable
    {
       public static void Write(DataTable dt, string filePath)
        {
            int i = 0;
            StreamWriter sw = null;

            try
            {

                sw = new StreamWriter(filePath + "\\Acord_Combined.txt", false);

                for (i = 0; i < dt.Columns.Count-1; i++)
                {

                    sw.Write(String.Format("{0,-50}",dt.Columns[i].ColumnName));

                }
                sw.Write(dt.Columns[i].ColumnName);
                sw.WriteLine();

                foreach (DataRow row in dt.Rows)
                {
                    object[] array = row.ItemArray;

                    for (i = 0; i < array.Length - 1; i++)
                    {
                        sw.Write(String.Format("{0,-50}",array[i].ToString()));
                    }
                    sw.Write(array[i].ToString());
                    sw.WriteLine();

                }

                sw.Close();
            }

            catch (Exception ex)
            {
                MessageBox.Show("Invalid Operation : \n" + ex.ToString(),
                                "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}

Now I still need to append data back into The same xml files after I do some processing. As well as I have to depersonalize the data. So I'm assuming I just need to do sets rather than Gets. Not sure of the syntax for this process yet. If you have suggestions to improve this please feel free to leave a comment.