Can this control open, edit and save Excel File from Code. Open a File from code and not in Page_Init event.
If the Spreadsheet needs to be populated programmatically, there are two options:
using System;using AJAX = Telerik.Web.Spreadsheet;using System.Collections.Generic;public partial class Default : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { AJAX.Workbook ajaxWorkbook = new AJAX.Workbook(); AJAX.Worksheet ajaxWorksheet = ajaxWorkbook.AddSheet(); AJAX.Row row = new AJAX.Row() { Index = 2, Cells = new List<AJAX.Cell> { } }; row.AddCell(new AJAX.Cell() { Index = 2, Value = "Test cell" }); ajaxWorksheet.AddRow(row); RadSpreadsheet1.Sheets.Add(ajaxWorksheet); }}If an Excel file needs to be loaded manually, the DocumentProcessingLibrary can be used and then the DPL workbook can be converted to AJAX workbook and adding the sheets from the workbook to the RadSpreadsheet will do the job.