How to search for a date and check if it exists in a datetime array in c#

I have a DateTime array, into which I want to insert certain dates. But beforehand I want to check, if the date already exists in the array. I am not able to use Contains or Exists in my code.

DateTime

Contains

Exists

for (int i = 0; i < TableFinal.Rows.Count; i++)

DateTime existingDates;

if (dsCSV.Tables[0].Rows.Count > 0)

var previousRatingDate = TableFinal.Rows[i]["RatingDate"];
if (existingDates.Contains(previousRatingDate))

//if not then insert previousRatingDate into array





Contains

Exists

IndexOf

Array

Array.IndexOf(anyArray, value)

Contains

Exists

1 Answer
1

Make Extension Method like this:

Extension Method

using System;
using System.Linq;
public static class Extensions

public static void Add<T>(this T _self, T item)

if(Array.IndexOf(_self, item)== -1)

Array.Resize(ref _self, _self.Length + 1);
_self[_self.Length - 1] = item;





now you can use like :

DateTime existingDates= new DateTime ;
existingDates.Add<DateTime>(DateTime.Now);


Or You can use List Instead Arraylike this:

List

Array

var existingDates = new List<string>();
var previousRatingDate = TableFinal.Rows[i]["RatingDate"].ToString();

if (!existingDates.Any(item => item == previousRatingDate))

existingDates.Add(previousRatingDate);



I hope it help you.

DateTime

(DateTime)dateValue

Type

RatingDate

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