MVC 4 - Insert list/array from Controller to SQL Server

Question

I am using MVC4 C# Razor view and MS SQL Server. I need to insert a list/array value from controller to sql server. I am passing values from view to controller and getting the values in controller.

My data structures are -

{sid: "101", m1Qty: "1", m2Qty: "3", m3Qty: ""}
{sid: "102", m1Qty: "5", m2Qty: "6", m3Qty: ""}
{sid: "103", m1Qty: "8", m2Qty: "0", m3Qty: ""}

Above data needed to insert my table (tbl_monthqty) in the below order. ID auto generated -

ID  SID     MonthID   mQty
1   101        1       1 
2   102        1       5
3   103        1       8
4   101        2       3
5   102        2       6

If any value null or 0, need to ignore

MonthID is for example - m1Qty = 1, m2Qty = 2, m3Qty = 3

My controller (C#) is -

[HttpPost]
public JsonResult SaveQty(IList<AllQty> model)
{
    var list = new [] { model };
    var count = list.Count();

    DataTable dt = new DataTable();
    dt.Columns.Add("SID");
    dt.Columns.Add("MonthID");
    dt.Columns.Add("mQty");

    for(int i=0; i<count; i++)
    {
        //dt.Rows.Add();
        // Not sure what I will do here
    }

    return Json(new { success = true });
}

My class is -

public class AllQty
{
    public int SID { get; set; }
    public int MonthID { get; set; }
    public int mQty { get; set; }
}

I am getting the list value in controller but not sure how I will insert those list/array values in my table. I have tried few asked questions like this but did not work.

@adiga, my data structure is different from the above question — Arif
– Arif, Commented Oct 17, 2017 at 9:47

Aryan Firouzian · Accepted Answer · 2017-10-17 11:09:46Z

First create data model that represent json data structure:

public class FirstModel
  {
    public int SID;
    public string m1Qty;
    public string m2Qty;
    public string m3Qty;
  }

Then data model that you want to store the data:

public class AllQty
  {
    public int SID { get; set; }
    public int MonthID { get; set; }
    public int mQty { get; set; }
  }

Then convert the json to list of FirstModel objects (I assume you already did it), and finally convert data in List to List :

        List<FirstModel> qtYs = new List<FirstModel>();
        List<AllQty> allQties = new List<AllQty>();
        foreach (FirstModel item in qtYs)
        {
            if (string.IsNullOrEmpty(item.m1Qty))
            {
                AllQty allQty = new AllQty
                {
                    MonthID = 1,
                    mQty = int.Parse(item.m1Qty),
                    SID = item.SID
                };
                allQties.Add(allQty);
            }

            if (string.IsNullOrEmpty(item.m2Qty))
            {
                AllQty allQty = new AllQty
                {
                    MonthID = 2,
                    mQty = int.Parse(item.m1Qty),
                    SID = item.SID
                };
                allQties.Add(allQty);
            }

            if (string.IsNullOrEmpty(item.m3Qty))
            {
                AllQty allQty = new AllQty
                {
                    MonthID = 3,
                    mQty = int.Parse(item.m1Qty),
                    SID = item.SID
                };
                allQties.Add(allQty);
            }
        }

        DataTable dt = new DataTable();
        dt.Columns.Add("SID");
        dt.Columns.Add("MonthID");
        dt.Columns.Add("mQty");

        foreach (AllQty allQty in allQties)
        {
            var row = dt.NewRow();

            row["SID"] = allQty.SID;
            row["MonthID"] = allQty.MonthID;
            row["mQty"] = allQty.mQty;

            dt.Rows.Add(row);
        }

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