Como obtener los datos de un documento excel c asp net libereria openxml

Introduction

ASP.NET is a popular programming language used for developing web applications. It provides a framework for building dynamic and web services. One common task in web development is to data from an Excel document using ASP.NET. In this article, we will explore how to this using the OpenXML library in C#.

Using the OpenXML Library

The OpenXML library is a powerful tool for working with documents, including Excel files. It allows us to read, write, and the contents of these files . To get started, we need to add a reference to the OpenXML library in our ASP.NET project.


using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;

Reading Data from an Excel Document

To read data from an Excel document, we first need to open the file using the SpreadsheetDocument class. We can then access the worksheets in the document and iterate over the rows and columns to retrieve the data.


 filePath = "path/to/excel/file.xlsx";

using (SpreadsheetDocument document = SpreadsheetDocument.Open(filePath, ))
{
    WorkbookPart workbookPart = document.WorkbookPart;
    WorksheetPart worksheetPart = workbookPart.WorksheetParts.First();
    Worksheet worksheet = worksheetPart.Worksheet;
    
     (Row row in worksheet.Descendants())
    {
        foreach (Cell cell in row.Descendants())
        {
            string cellValue = cell.InnerText;
            // Process the cell value
        }
    }
}

Filtering Data

If we want to filter the data based on certain criteria, we can add conditions inside the inner loop. For example, let's say we only want to retrieve rows where the value in A is greater than 10.


foreach (Row row in worksheet.Descendants())
{
    Cell cellA = row.Descendants().FirstOrDefault(c => c.CellReference.Value.StartsWith("A"));
    if (cellA != null)
    {
        string cellValueA = cellA.InnerText;
        int valueA;
        if (int.TryParse(cellValueA, out valueA))
        {
            if (valueA > 10)
            {
                foreach (Cell cell in row.Descendants())
                {
                    string cellValue = cell.InnerText;
                    // Process the cell value
                }
            }
        }
    }
}

Conclusion

Retrieving data from an Excel document using ASP.NET can be achieved using the OpenXML library. By leveraging the power of this library, we can read and manipulate the contents of Excel files programmatically. This allows us to extract and filter data from these files, providing us with valuable insights for our web applications.

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