BL(BLL)

STEP 1: Create the class file like PropellerStudioBL.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using VCSB.INTRANET.DAL;
using System.Web.UI.WebControls;
namespace VCSB.INTRANET.BLL
{
    public class PropellerStudioBL:IVCSBIntranetBL
    {

        //empty constructor
        int _listId;

        string _title = string.Empty, _description = string.Empty; FileUpload _filePath;
        string _propellertitle;

        public string Propellertitle
        {
            get { return _propellertitle; }
            set { _propellertitle = value; }
        }
        public FileUpload FilePath
        {
            get { return _filePath; }
            set { _filePath = value; }
        }

        public string Description
        {
            get { return _description; }
            set { _description = value; }
        }

     
        public PropellerStudioBL()
        {

        }
        public PropellerStudioBL(int listId)
        {
          
            this.ID = listId;
           
        }
        public PropellerStudioBL(string propellertitle, string description, FileUpload filePath)
        {
            this.Propellertitle = propellertitle;
            this.Description = description;
            this.FilePath = filePath;
        }

        public PropellerStudioBL(int propellerID,string propellertitle, string description, FileUpload filePath)
        {
            this.ID = propellerID;
            this.Propellertitle = propellertitle;
            this.Description = description;
            this.FilePath = filePath;
        }
       
        public string Title
        {
            get
            {
                return _title;
            }
            set
            {
                value = _title;
            }
        }

        public bool insert()
        {
           
          
           return PropellerStudioDL.insert(this);
        }

        public bool update()
        {
            return PropellerStudioDL.update(this);
        }

        public bool delete()
        {
            return PropellerStudioDL.delete(this);
          
        }

        public System.Data.DataTable GetAllListItem()
        {
           return PropellerStudioDL.GetAllListItem(this);
          
        }


        public System.Data.DataTable GetPropellerData()
        {
          
           return PropellerStudioDL.GetPropellerData(this);
        }

        public System.Data.DataTable GetSingleRowListItem()
        {
           
            return PropellerStudioDL.GetSingleRowListItem(this);
        }
       
        public int ID
        {
            get { return _listId; }
            set { _listId = value; }
        }


        public void GetSingleRowListItem(int id)
        {
            throw new NotImplementedException();
        }
    }
}