change default column header while importing data

[Nazneen_1]

Hi,'

i want the default column header (F1) to be removed and in that place my excel file column "Filename" must come. i am importing data from an excel sheet into my grid then adding another 3 columns and exporting the edited data into excel again.

so far i have tried

                     dataGridView1.Columns[0].Name = "Filename";

                   dtExcel.Columns.Add("Filename");

                dataGridView1.Columns[0].HeaderText = "Filename"

                by this all new column of filename is getting added but that F1 is not getting replaced.
                attaching the image for better understanding.

                Help Please.