To pass more than one row value from database to XML

Question

I want to generate an xml file in the fllowing format.

Answer 1

Among other problems, the main one is here:

data.SalesInvoice = new[] { sales };

You create the SalesInvoice array from scratch at evey cycle loop, instead of creating it before the cycle and adding elements inside it.

Here's how I would do (look at variable names too please):

//Plural as it is a list
List<SalesInvoice> salesInvoices = new List<SalesInvoice>();

for (int i = 0; i < dataGridView1.RowCount - 1; i++)
{
    //Singular as it is a single element
    var salesInvoice = new SalesInvoice();
    salesInvoice.DocNo = dataGridView1.Rows[i].Cells[0].FormattedValue.ToString();
    salesInvoice.Item = dataGridView1.Rows[i].Cells[1].FormattedValue.ToString();
    salesInvoice.Qty = dataGridView1.Rows[i].Cells[2].FormattedValue.ToString();
    salesInvoice.Price = dataGridView1.Rows[i].Cells[3].FormattedValue.ToString();
    salesInvoices.Add(salesInvoice);

    //What's the purpose of the next line?
    var serializer1 = new XmlSerializer(typeof(SalesInvoice));
}

// I pluralized this property name too
data.SalesInvoices = salesInvoices.ToArray();

Answer 2

Use a DataSet/DataTable and the program becomes trivial. Add two datagridviews to your form.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        const string FILENAME = @"c:\temp\test.xml";
        AutoCount autoCount = new AutoCount();
        public Form1()
        {
            InitializeComponent();

            autoCount.ds.WriteXml(FILENAME, XmlWriteMode.WriteSchema);
            dataGridView1.DataSource = autoCount.ds.Tables["AutoCount"];
            dataGridView2.DataSource = autoCount.ds.Tables["Sales"];

        }
        public class AutoCount
        {
            public DataSet ds {get; set;} 


            public AutoCount()
            {
                ds = new DataSet();
                DataTable autoCount = new DataTable("AutoCount");
                ds.Tables.Add(autoCount);
                DataTable sales = new DataTable("Sales");
                ds.Tables.Add(sales);

                autoCount.Columns.Add("Product", typeof(string));
                autoCount.Columns.Add("Version", typeof(string));
                autoCount.Columns.Add("CreatedApplication", typeof(string));
                autoCount.Columns.Add("CreatedBy", typeof(string));
                autoCount.Rows.Add(new string[] {
                    "AutoCount Accounting",
                    "1.5",
                    "BApp",
                    "Business Solutions"
                });

                sales.Columns.Add("DocNo", typeof(string));
                sales.Columns.Add("Item", typeof(string));
                sales.Columns.Add("Qty", typeof(int));
                sales.Columns.Add("Price", typeof(double));

                sales.Rows.Add(new object[] {
                    "S0001",
                    "XXX",
                    2,
                    6.00
                });

                sales.Rows.Add(new object[] {
                    "S0002",
                    "YYY",
                    3,
                    50.00
                });

            }
        }

    }
}