Populating datatable from an Array's

Question

I have three arrays as mentioned below. Trying to populate the datatable. But the output was not expected.

needed in this Format

AnalyteNames = new string[] { "NA", "K", "CL" };

Units =  "MML";

values= new string[]{"14", "15","16"}

The below was the written code.

int count = 0;
for (int col = 0; col < dataSave.Columns.Count; col++)
{
    int i = 0;
    if (col == 0)
    {
        for (int row = 1; row < dataSave.Rows.Count - 1; row++)
        {
            dr[col] = CheckedAnalytes[i];
            i++;
        }
    }

    if (count == 1)
    {
        i = 0;
        for (int row = 1; row < dataSave.Rows.Count - 1; row++)
        {
            dr[col] = SelectedUnits;
        }
    }

    if (count == 2)
    {
        i = 0;
        for (int row = 1; row < dataSave.Rows.Count - 1; row++)
        {
            dr[col] = values[i];
            i++;
        }
    }
    count++;
}

Answer 1

Assuming three arrays with the same length:

var analyteNames = new string[] { "NA", "K", "CL" };
var units = new string[]{"MML", "MML", "MML"};
var values = new string[]{"14", "15","16"};

And a data table with three columns:

var dt = new DataTable();
dt.Columns.Add("analyteNames", typeof(string));
dt.Columns.Add("units", typeof(string));
dt.Columns.Add("values", typeof(string));

You can use a single loop, using the DataRowCollection Add method overload that accepts params object[] :

for(var i = 0; i < analyteNames.Length; i++)
{
    dt.Rows.Add(analyteNames[i], units[i], values[i]);
}

Answer 2

If it was me I'll populate a Custom List insert Values into it and the populate DataTable()

Custom List

public class Values
{
  public int value1
  {
    get;
    set;
  }
  public string value2
  {
    get;
    set;
  }
  public string value3
  {
    get;
    set;
  }
}

Next Populate the List

List<Values> list = new List<Values>();
list.Add(new Values{
    value1 = 1,
    value2 = "",
    value3 = ""
});

Next Populate your DataTable()

var dt = new DateTable();

  dt.Columns.Add(Header1, typeof(int));
  dt.Columns.Add(Header2, typeof(string));
  dt.Columns.Add(Header3, typeof(string));

foreach(var item in list)
{
  dt.Rows.Add(item.value1,item.value2,item.value3);
}