I found the solution on stackoverflow for setting one column of Excel file as Text.
DataFormat currDataFormat = this.Workbook.CreateDataFormat();
CellStyle textStyle = this.Workbook.CreateCellStyle();
textStyle.DataFormat = currDataFormat.GetFormat("@");
sheet.SetDefaultColumnStyle(0, textStyle);
I tried same, while exporting the excel file, it is showing "Date" format for the same column. It is not working for me. I want one column as "Text" format.
Thanks in advance.