CODEWITHSUNDEEP
c#asp.net-mvc
Harvey Masuluke
Harvey Masuluke

Reputation: 5

How to get rid of duplicate in asp.net mvc?

How can get rid of duplicate and display record(s) using jQuery dataTables in asp.net mvc.

public ActionResult FilterData()
{
    var results = db.Cbps.Where(a => a.SDATE == a.SDATE);
    List<string> filterdDate = new List<string>();

    foreach (var item in results)
    {             
        filterdDate.Add(item.SDATE);
    }

    var obj = new { data = filterdDate };

    //var da = obj;
    return Json(obj, JsonRequestBehavior.AllowGet);
}

<script>
    $(document).ready(function () {
        $('#abc').DataTable({

            "ajax": {
                "url": "/Filter/FilterData",
                "type": "GET",
                "datatype": "json"
            },
            "columns": [

                { "data": "SDATE", "autoWidth": true }
            ]
        });
    });
</script>

Results with duplicate

2020-04-18
2020-04-18
2020-04-18
2020-04-18
2020-04-17
2020-04-17
2020-04-17
2020-04-17

Without duplicate

2020-04-18
2020-04-17

Upvotes: 0

Views: 100

Answers (2)

shahraiz kayani
shahraiz kayani

Reputation: 26

You can use HashSet to remove duplicates

var filterdDate = new HashSet<string>(results);

var obj = new { data = filterdDate };

 return Json(obj, JsonRequestBehavior.AllowGet);

Upvotes: 0

KingOfArrows
KingOfArrows

Reputation: 556

You can update your code to do the following:

var filteredDate = db.Cbps.Where(a => a.SDATE == a.SDATE).Select(c => c.SDATE).Distinct();

var obj = new { data = filterdDate };

return Json(obj, JsonRequestBehavior.AllowGet);

The LINQ extension method Distinct() will return unique data.

Upvotes: 1

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