How to insert value in a DataGridView from a DataSet based on data contained in a DataGridView?

Question

I need to fill out a DataGridView that already contains a list of all the items. This based on movement records of materials contained in a DataSet . The DataGridView already has all items, for example: A, B, C, D, etc. And the program will check the current balance of each item based on movements of a stock contained in the DataSet .

I thought to do a foreach inside the other. The DataGridView out line by line to find the name of the item and the other internal foreach makes the search in dataSet where the movement of a stock are recorded.

I made it this way, but it is filling only the first line of the Balance column.

void FillDataGrid()
{
    var result = 0;
    string strRowMaterial = string.Empty;

    Conection ca = new Conection();
    string sql = "";
    sql += " Select ";
    sql += " idRegMovement, CatMovement, NameMovement, codMaterial, AmountMovemented ";
    sql += " From RegMovement ";
    sql += " ORDER BY idRegMovement ";

    ca.Connect();
    OleDbDataAdapter da = new OleDbDataAdapter(sql, ca.cx);
    DataSet ds = new DataSet();
    da.Fill(ds, "RegMovements");
    if (ds.Tables["RegMovements"].Rows.Count == 0)
    {
        ca.Disconnect();
    }
    else
    {

        foreach (DataGridViewRow dr in datagridview.Rows)
        {
            strRowMaterial = Convert.ToString(dr.Cells["codMaterial"].Value);

            foreach (DataRow row in ds.Tables["RegMovements"].Rows)
            {
                if (string.Compare(row["codMaterial"].ToString(), strRowMaterial, StringComparison.InvariantCultureIgnoreCase) == 0)
                {
                    var Amount = Convert.ToInt32(row["AmountMovemented"]);

                    if (string.Compare(row["CatMovement"].ToString(), "Input", StringComparison.InvariantCultureIgnoreCase) == 0)
                        result += Amount;

                    else
                        result -= Amount; 
                }
                else
                {
                    result = 0;
                }                        

            }
            datagridview.CurrentRow.Cells["Balance"].Value = result;
        }
    }
    ca.Disconnect();
}

Regards!

Answer 1

When adding the value you use only 1 row CurrentRow

datagridview.CurrentRow.Cells["Balance"].Value = result;

if you foreach through the:

foreach (DataGridViewRow dr in datagridview.Rows)

you should also use the variable:

dr.Cells["Balance"].Value = result;