using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using System.Text;

using System.Threading.Tasks;

using System.Linq.Dynamic;

​

public class Program

{

 public static void Main(string[] args)

        {

            List<Object> _dynamicObjectList = new List<Object>();

            for (int i = 0; i < 5; i++)

            {

                _dynamicObjectList.Add(new  { ID = i, Name = "stu" + i, Address = "address234324" + i ,DateField =DateTime.Now.AddDays(i) });

            }

            test.AddToSearchCriteria("ID", "1,2");

            test.AddToSearchCriteria("Name", "\"stu1\",\"stu2\"");

            test.AddToSearchCriteria("DateField", test.ToDateRange(dateFrom:DateTime.Now,dateTo:DateTime.Now.AddDays(2)));

​

​

           var returnList = _dynamicObjectList.GetFilteredData();

            Console.WriteLine(returnList.Count());

            Console.ReadLine();

        }

    }

  public static class test

    {

        private static List<object> objSearchCriteriaList = new List<object>();

        //Add search criteria

        public static void AddToSearchCriteria(string propertyName, string propertyValue)

        {

            try

            {

​

                if (!string.IsNullOrEmpty(propertyValue))

                {

                    List<object> checkList =

                        objSearchCriteriaList.Where(m => ((dynamic)m).PropertyName == (dynamic)propertyName).ToList();

                    if (checkList.Count == 0)

                    {

                        objSearchCriteriaList.Add(

                            new

                            {

                                PropertyName = (dynamic)propertyName,

                                PropertyValue = (dynamic)propertyValue

                            });

                    }

                }

            }

            catch (Exception ex)

            {

​

                throw ex;

            }

        }

        /// <summary>

        /// Used to create date From and date to string for maintaing common format.

        /// </summary>

        /// <param name="dateFrom"></param>

        /// <param name="dateTo"></param>

        /// <returns></returns>

        public static string ToDateRange(DateTime dateFrom, DateTime dateTo)

        {

            return dateFrom.ToShortDateString() + "#***#**#**" + dateTo.ToShortDateString();

        }

​

        //get search string 

        public static string CreateSearchString()

        {

            try

            {

​

                string opertator = " || ";

                StringBuilder searchStr = new StringBuilder();

                foreach (var objectSerach in objSearchCriteriaList)

                {

                    if (((dynamic)objectSerach).PropertyValue.Contains("#***#**#**"))

                    {

                        string dateStr = ((dynamic)objectSerach).PropertyValue.Replace("#***#**#**", "#");

                        var listOfDate = dateStr.Split('#');

                        if (searchStr.Length == 0)

                        {

                            searchStr.AppendFormat("it." + ((dynamic)objectSerach).PropertyName + ".ToShortDateString() >= \"{0}\" && " + "it." + ((dynamic)objectSerach).PropertyName +

                                ".ToShortDateString()<= \"{1}\"", listOfDate[0], listOfDate[1]);

                        }

                        else

                        {

                            searchStr.AppendFormat("|| it." + ((dynamic)objectSerach).PropertyName + ".ToShortDateString() >= \"{0}\" && " + "it." + ((dynamic)objectSerach).PropertyName +

                              ".ToShortDateString() <= \"{1}\"", listOfDate[0], listOfDate[1]);

                        }

                    }

                    else

                    {

                        var paramValues = ((dynamic)objectSerach).PropertyValue.Split(',');

​

                        foreach (var param in paramValues)

                        {

​

                            if (searchStr.Length == 0)

                            {

                                searchStr.Append("it." + ((dynamic)objectSerach).PropertyName + "= " + param);

                            }

                            else

                            {

                                searchStr.Append(opertator + " it." + ((dynamic)objectSerach).PropertyName + "= " + param);

​

                            }

                        }

​

​

                    }

​

​

                }

                objSearchCriteriaList.Clear();

                return searchStr.ToString();

            }

            catch (Exception ex)

            {

​

                throw ex;

            }

        }

​

        public static IQueryable GetFilteredData<T>(this IEnumerable<T> source)

        {

            string searchCriteria = CreateSearchString();

            if (!string.IsNullOrEmpty(searchCriteria))

            {

                IList<T> returnList = new List<T>();

                returnList = source.AsQueryable().Where(searchCriteria).ToList();

                return returnList.AsQueryable();

            }

            else

            {

                return source.AsQueryable();

            }

​

        }}

​