I want to export dataset data into excel with number, date format support, but I do not want to install Excel in my server. I donot have the licences. here is the code for you. the following code use xml to handle the excel. Imports Microsoft.VisualBasic Imports System.Data Imports System.IO Public Class WorkBookEngine     Public Sub CreateWorkbook(ByVal dt As DataTable, ByVal Filename As String)        ...