Export DataTable to excel with number formating using C# in ASP.Net

I have insertted two inputs (e.g. February and March data), however the output only shows the last record which is data in March.

Input:

Date, Market Value

2015/2/28, $123,456,789

2015/3/31, $456,789

Output:

Date, Market Value

2015/3/31, $456,789

How should I show all the input data instead? 

int count = 0;
                        foreach (DataTable dt in ds.Tables)
                        {

                            var ws = wb.Worksheets.Add(dt.TableName);

                            if (count == 0)
                            {
                                string[] columnNames = dt.Columns.Cast<DataColumn>().Select(x => x.ColumnName).ToArray();
                                string[] rowValue = new string[dt.Rows.Count];
                                for (int i = 0; i < dt.Rows.Count; i++)
                                {
                                    rowValue = dt.Rows[i].ItemArray.Select(x => x.ToString()).ToArray();
                                }

                                DateTime dttryparse;
                                for (int i = 0; i < columnNames.Count(); i++)
                                {
                                    ws.Cell(1, i + 1).SetValue(columnNames[i]);
                                }
                                for (int i = 0; i < rowValue.Count(); i++)     
                                {
                                    if (rowValue[i].Contains("$"))
                                    {
                                        ws.Cell(2, i + 1).SetValue(rowValue[i]);
                                        ws.Cell(2, i + 1).Style.NumberFormat.Format = "$ #,##0.00";
                                        ws.Cell(2, i + 1).DataType = XLCellValues.Text;
                                    }
                                    else if (rowValue[i].Contains("%"))
                                    {
                                        ws.Cell(2, i + 1).SetValue(rowValue[i]);
                                        ws.Cell(2, i + 1).DataType = XLCellValues.Text;
                                        ws.Cell(2, i + 1).Style.NumberFormat.Format = "0.0%";
                                    }
                                    else if (DateTime.TryParse(rowValue[i], out dttryparse))
                                    {
                                        ws.Cell(2, i + 1).SetValue(DateTime.Parse(rowValue[i]));
                                        ws.Cell(2, i + 1).DataType = XLCellValues.DateTime;
                                    }
                                }
                                ws.Columns().AdjustToContents();
                                count += 1;
                            }
                            else
                            {
                                var rowValue = dt.Rows[0].ItemArray.Select(x => x.ToString()).ToArray();
                                double dbltryparse = 0;
                                DateTime dttryparse;
                                for (int i = 0; i < dt.Rows.Count; i++)
                                {
                                    if (rowValue[i].Contains("$"))
                                    {
                                        ws.Cell(2, i + 1).SetValue(rowValue[i]);
                                        ws.Cell(2, i + 1).Style.NumberFormat.Format = "$ #,##0.00";
                                        ws.Cell(2, i + 1).DataType = XLCellValues.Text;
                                    }
                                    else if (rowValue[i].Contains("%"))
                                    {
                                        ws.Cell(2, i + 1).SetValue(double.Parse(rowValue[i]));
                                        ws.Cell(2, i + 1).DataType = XLCellValues.Text;
                                        ws.Cell(2, i + 1).Style.NumberFormat.Format = "0.0%";
                                    }
                                    else if (DateTime.TryParse(rowValue[i], out dttryparse))
                                    {
                                        ws.Cell(2, i + 1).SetValue(DateTime.Parse(rowValue[i]));
                                        ws.Cell(2, i + 1).DataType = XLCellValues.DateTime;
                                    }
                                }
                                ws.Columns().AdjustToContents();
                            }
                        }