how to show the textfile data into datagridview in c#

          OpenFileDialog dialog = new OpenFileDialog();

            dialog.Filter = "CSV document(*.csv)|*.csv";

            DialogResult result = dialog.ShowDialog();

            if (result == DialogResult.OK)

            {

                string csvFile = dialog.FileName;

                Workbook workbook = new Workbook();

                workbook.LoadFromFile(@"D:\my file\csvtodatatable.csv", ",");

                Worksheet worksheet = workbook.Worksheets[0];

                System.Data.DataTable t = worksheet.ExportDataTable();

                this.dataGridView1.DataSource = t;   
             }