C# - How to Export large table data to multiple Excel Sheets on Single Excel file in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.Data;


namespace TechBrothersIT.com_CSharp_Tutorial
{
class Program
    {
staticvoid Main(string[] args)
        {

string datetime = DateTime.Now.ToString("yyyyMMddHHmmss");
string LogFolder = @"C:\Log\";
            try
            {

                string FolderPath = @"C:\Destination\"; //Provide Destination folder path
                string ExcelFileName = "Customer"; //Provide the Excel File Name you like to create
                string TableName = "dbo.Customer";//Provide the table that you want to export to excel
                Int32 RecordCntPerSheet = 100;//Provide the number of rows you want per sheet
                string RecordCntPerSheetDecimal = RecordCntPerSheet + ".0";
                ExcelFileName = ExcelFileName + "_" + datetime;


                OleDbConnection Excel_OLE_Con = new OleDbConnection();
                OleDbCommand Excel_OLE_Cmd = new OleDbCommand();

                //Construct ConnectionString for Excel
                string connstring = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source="
                                    + FolderPath + ExcelFileName
                                    + ";" + "Extended Properties=\"Excel 12.0 Xml;HDR=YES;\"";

//drop Excel file if exists
                File.Delete(FolderPath + "\\" + ExcelFileName + ".xlsx");


                //Create Connection to SQL Server
                SqlConnection SQLConnection = new SqlConnection();
                SQLConnection.ConnectionString = "Data Source = (local); Initial Catalog =TechBrothersIT; "
                   + "Integrated Security=true;";


                //Read distinct Group Values for each Excel Sheet
                string query = "select ceiling(count(*)/" + RecordCntPerSheetDecimal + ") AS LoopCnt from" + TableName;
                decimal LoopCnt = 0;

                //Get the Count of Sheets need to be created
                SqlCommand cmd = SQLConnection.CreateCommand();
                cmd.CommandText = query;
                SQLConnection.Open();
                LoopCnt = (decimal)cmd.ExecuteScalar();
                SQLConnection.Close();


                string SheetName = "Sheet";
                int startRowCnt = 0;
                int endRowCnt = RecordCntPerSheet;

                for (int sheetloop = 1; sheetloop <= LoopCnt; sheetloop++)
                {
                    //Load Data into DataTable from SQL ServerTable
                    string queryString = ";with cte as (Select *, Row_Number() over (order by (Select 1)) AS RowNumber from" +
                    TableName + ") Select * From cte where RowNumber > " + startRowCnt.ToString() + " and RowNumber<=" + endRowCnt.ToString();
                    SqlDataAdapter adapter = new SqlDataAdapter(queryString, SQLConnection);
                    DataSet ds = new DataSet();
                    adapter.Fill(ds);

                    //Get Header Columns
                    string TableColumns = "";

                    // Get the Column List from Data Table so can create Excel Sheet with Header
                    foreach (DataTable table in ds.Tables)
                    {
                        foreach (DataColumn column in table.Columns)
                        {
                            TableColumns += column + "],[";
                        }
                    }

                    // Replace most right comma from Columnlist
                    TableColumns = ("[" + TableColumns.Replace(",", " Text,").TrimEnd(','));
                    TableColumns = TableColumns.Remove(TableColumns.Length - 2);

                    //Use OLE DB Connection and Create Excel Sheet
                    Excel_OLE_Con.ConnectionString = connstring;
                    Excel_OLE_Con.Open();
                    Excel_OLE_Cmd.Connection = Excel_OLE_Con;
                    Excel_OLE_Cmd.CommandText = "Create table [" + SheetName 
                                               + sheetloop.ToString() + "] ("
                                               + TableColumns + ")";
                    Excel_OLE_Cmd.ExecuteNonQuery();


                    //Write Data to Excel Sheet from DataTable dynamically
                    foreach (DataTable table in ds.Tables)
                    {
                        String sqlCommandInsert = "";
                        String sqlCommandValue = "";
                        foreach (DataColumn dataColumn in table.Columns)
                        {
                            sqlCommandValue += dataColumn + "],[";
                        }

                        sqlCommandValue = "[" + sqlCommandValue.TrimEnd(',');
                        sqlCommandValue = sqlCommandValue.Remove(sqlCommandValue.Length - 2);
                        sqlCommandInsert = "INSERT into [" + SheetName + sheetloop.ToString()
                                         + "] (" + sqlCommandValue + ") VALUES(";

                        int columnCount = table.Columns.Count;
                        foreach (DataRow row in table.Rows)
                        {
                            string columnvalues = "";
                            for (int i = 0; i < columnCount; i++)
                            {
                                int index = table.Rows.IndexOf(row);
                                columnvalues += "'" + table.Rows[index].ItemArray[i] + "',";

                            }
                            columnvalues = columnvalues.TrimEnd(',');
                            var command = sqlCommandInsert + columnvalues + ")";
                            Excel_OLE_Cmd.CommandText = command;
                            Excel_OLE_Cmd.ExecuteNonQuery();
                        }

                    }

                    startRowCnt += RecordCntPerSheet;
                    endRowCnt += RecordCntPerSheet;
                    Excel_OLE_Con.Close();
                }

            }
            catch (Exception exception)
            {
                // Create Log File for Errors
                using (StreamWriter sw = File.CreateText(LogFolder
                    + "\\" + "ErrorLog_" + datetime + ".log"))
                {
                    sw.WriteLine(exception.ToString());

                }

            }

        }
    }
}