Dynamic Bind Grid using Store Procedure using Edit Command

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C#

ASP.NET

i have dynamic grid view for edit multiple product store in database. now i want to edit that product so using edit command of gridview but there is no record set in textbox inside gridview.
here is code for that :-

protected void GrdOrder_EditCommand(object source, DataGridCommandEventArgs e)
    {
        try
        {
            int OID = Convert.ToInt32(GrdOrder.DataKeys[e.Item.ItemIndex]);
            DatabaseHelper db = new DatabaseHelper();
            

                int rowIndex = 0;

                db.GetProductByOrderID(Convert.ToInt32(OID));
                

                if (ds.Tables[0] != null && ds.Tables[0].Rows.Count > 0)
                {
                    for (int i = 1; i <= ds.Tables[0].Rows.Count; i++)
                    {
                        TextBox box1 = (TextBox)GrdProduct.Rows[rowIndex].Cells[1].FindControl("txtitemname");
                        TextBox box2 = (TextBox)GrdProduct.Rows[rowIndex].Cells[1].FindControl("txtqty");
                        TextBox box3 = (TextBox)GrdProduct.Rows[rowIndex].Cells[1].FindControl("txtprice");

                        
                        box1.Text = ds.Tables[0].Rows[0]["ProductName"].ToString();
                        box2.Text = ds.Tables[0].Rows[0]["Quantity"].ToString();
                        box3.Text = ds.Tables[0].Rows[0]["Price"].ToString();

                        rowIndex++;
                    }
                }
            }
        }
        catch (Exception ex)
        {
            lblerror.Visible = true;
            lblerror.InnerText = ex.Message.ToString();
        }
    }

my ds.Tables[0] found row 2 .when i try to bind in gridview its not bind.
any one other view to bind it dynamically...
whne i try to bound it give error like that

Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index