5 Ways to Use Elerium Excel .NET Writer for Faster Spreadsheet Automation

Beginner’s Guide to Elerium Excel .NET Writer: Setup and First Project

This guide walks a beginner through installing Elerium Excel .NET Writer, creating a simple .NET project, and producing an Excel file with basic formatting and data export. Assumptions: you’re using .NET 6 or later on Windows, macOS, or Linux and have a code editor (Visual Studio, VS Code, Rider).

1. What Elerium Excel .NET Writer is (brief)

Elerium Excel .NET Writer is a .NET library for programmatically creating and writing Excel (.xlsx) files from .NET applications. It focuses on simple APIs for exporting data, applying basic formatting, and generating performance-friendly spreadsheets.

2. Prerequisites

• .NET SDK 6+ installed (dotnet –version)
• Code editor (Visual Studio 2022+, VS Code, JetBrains Rider)
• NuGet access (dotnet CLI or IDE)
• Basic C# familiarity

3. Install the package

Using the dotnet CLI:

Code
Copy CodeCopied
dotnet add package Elerium.Excel.NetWriter 

Or via Visual Studio: Manage NuGet Packages → Browse → search “Elerium.Excel.NetWriter” → Install.

4. Create a new console project

Using the CLI:

Code
Copy CodeCopied
dotnet new console -n ExcelWriterDemo cd ExcelWriterDemo 

Add the package if not done already.

5. Minimal example: create an Excel file

Create or replace Program.cs with this example (C#):

csharp
Copy CodeCopied
using System;
using System.Collections.Generic;
using Elerium.Excel;

class Program
{
static void Main()
    {
        var filePath = “SampleReport.xlsx”;

        // Create a workbook and a worksheet
        using var writer = new ExcelWriter(filePath);
        var sheet = writer.AddWorksheet(“Report”);

        // Write headers
        sheet.SetCell(0, 0, “Id”);
        sheet.SetCell(0, 1, “Name”);
        sheet.SetCell(0, 2, “Date”);
        sheet.SetCell(0, 3, “Amount”);

        // Sample data
        var rows = new List<(int Id, string Name, DateTime Date, decimal Amount)> {
            (1, “Alice”, DateTime.Today.AddDays(-2), 123.45m),
            (2, “Bob”, DateTime.Today.AddDays(-1), 67.89m),
            (3, “Carol”, DateTime.Today, 250.00m)
        };

        // Populate rows
        for (int i = 0; i < rows.Count; i++)
        {
            var r = rows[i];
            sheet.SetCell(i + 1, 0, r.Id);
            sheet.SetCell(i + 1, 1, r.Name);
            sheet.SetCell(i + 1, 2, r.Date);
            sheet.SetCell(i + 1, 3, r.Amount);
        }

        // Apply simple formatting
        sheet.SetBold(0, 0, 0, 3);           // bold header row
        sheet.SetNumberFormat(1, 3, rows.Count, 3, ”#,##0.00”); // currency format for Amount column
        sheet.AutoFitColumns(0, 0, 3);      // auto-fit columns A-D

        // Save (disposed writer will flush to disk)
        writer.Save();
        Console.WriteLine($“Created {filePath}”);
    }
}

Notes: API names above (ExcelWriter, AddWorksheet, SetCell, SetBold, SetNumberFormat, AutoFitColumns, Save) are representative; check the library’s actual API if names differ.

6. Common tasks and code snippets

• Writing large datasets efficiently:
  • Use streaming row-writing methods if provided (e.g., BeginRow/WriteCell/EndRow) to minimize memory.
• Adding formulas:

csharp
Copy CodeCopied
sheet.SetCellFormula(1, 4, ”=SUM(D2:D4)”); // place formula in row 2 column E (0-based indices assumed)

• Merging cells and titles:

csharp
Copy CodeCopied
sheet.MergeCells(0, 0, 0, 3); // merge first row across columns A-D
sheet.SetCell(0, 0, “Sales Report”);
sheet.SetBold(0, 0, 0, 0);

• Styling cells:
  • Fonts, background colors, borders — use style objects or shorthand API methods depending on library.

7. Tips for a smooth experience

• Consult the library’s official documentation/examples for exact method names and advanced features.
• For large exports, test memory and use any streaming APIs.
• Validate generated files by opening in Excel or LibreOffice to ensure formatting and formulas behave as expected.
• Add unit tests for code that generates files to assert cell values and structure (open package in-memory to inspect).

8. Troubleshooting

• If NuGet package not found: confirm package name or check the vendor’s distribution channel (private feed, GitHub, or company site).
• If Excel file is corrupted: ensure writer is properly disposed/saved and that no concurrent writes occur.
• If formatting not applied: verify API expectations (0-based vs 1-based indices) and supported formats.

9. Next steps (suggested mini-projects)

• Export data from a database query with pagination and streaming.
• Build a formatted sales report with charts and conditional formatting.
• Create an import/export utility that reads templates and fills placeholders.

If you’d like, I can adapt the example to read data from a CSV or SQL database, or produce a version for .NET Core on Linux.