Progress Telerik UI for ASP.NET AJAX


  • The ASP.NET AJAX SpreadStreamProcessing library is built to handle large spreadsheet documents with great performance and minimal memory footprint in your .NET applications. 
  • This control is part of the Telerik UI for ASP.NET AJAX suite along with 120+ full-featured components, designed to build web apps for any browser and device in half the time.
  • The Web Forms UI suite comes with document processing library, rich example-driven articles and extensive docs & demos to help you with your development.

Telerik UI for ASP.NET AJAX Suite
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  • Overview

    RadSpreadStreamProcessing for ASP.NET AJAX is a library for generating large spreadsheet documents and exporting them to XLSX and CSV file formats with great performance, minimal memory and less resources.

  • Key Features

    Directly Write into a Stream

    Directly stream spreadsheet data to maximize performance. The library writes the spreadsheet content directly to a stream without saving the spreadsheet document model in memory.

    Append New Worksheets

    Append new worksheets to an existing workbook.


    Organize data in sections to keep what’s important in view and collapse what distracts you.

    Hide Rows and Columns 

    Hide individual rows and columns that you temporarily don’t need displayed.

    Format Cells 

    Change the appearance of an individual cell.

    Style Cells

    Apply a consistent style to all cells across your worksheet. Using cell styles allows you to format multiple cell properties in one step. You can apply a predefined style or create a new one.

    Merge Cells 

    Combine two or more adjacent cells into a single one that spans over multiple rows and columns.

    Set Scale Factor

    You can apply a scale factor to the exported document.

    Control the Selection and the Active Cell

    Export a document with selection range and specified active cell of the selection.

    Show and Hide Gridlines

    Temporarily remove all cell borders from the worksheet to enhance the visual presentation of the data.

    Freeze Panes

    Freeze important rows and columns so you can see them no matter where you go in your worksheet.

    Change the First Visible Cell

    Opens the spreadsheet on a particular cell or part of the worksheet.

Next Steps

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See the UI for ASP.NET AJAX in action and check how much it can do out-of-the-box.

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