gridControl Export to Excel

 //code on export to excel button
     private void buttonExportExcel_Click(object sender, EventArgs e)
    {
        SaveFileDialog saveFileDialogExcel = new SaveFileDialog();
        saveFileDialogExcel.Filter = "Excel files (*.xlsx)|*.xlsx";
        if (saveFileDialogExcel.ShowDialog() == DialogResult.OK)
        {
            string exportFilePath = saveFileDialogExcel.FileName;
            gridControl1.DataSource = selectgridvalues();
            gridControl1.ExportToXlsx(exportFilePath);
        }

    }