New to Telerik Document Processing? Start a free 30-day trial
Generating Excel Documents from IEnumerable Collections
Updated on Jun 5, 2026
Environment
| Version | Product | Author |
|---|---|---|
| 2024.2.426 | RadSpreadProcessing | Desislava Yordanova |
Description
This article demonstrates how to generate Excel documents from IEnumerable collections.
Solution
RadSpreadProcessing is the ideal fit for this requirement. You can iterate a collection of custom objects and fill the worksheet cells with the values from the respective fields. The following code snippet shows how to fill data in a worksheet from a collection of Employee objects. You can adapt this approach to any custom collection that you receive as input.
csharp
static void Main(string[] args)
{
Workbook workbook = new Workbook();
Worksheet worksheet = workbook.Worksheets.Add();
worksheet.Name = "Salary Report Q2 2024";
worksheet.Cells[5, 1].SetValue("Employee's name");
worksheet.Cells[5, 2].SetValue("Job Position");
worksheet.Cells[5, 3].SetValue("Hire Date");
worksheet.Cells[5, 4].SetValue("Salary");
List<Employee> employees = PopulateWithData();
//Let's fill the document with the employee data:
int startRowIndex = 6;
for (int i = 0; i < employees.Count; i++)
{
worksheet.Cells[startRowIndex + i, 1].SetValue(employees[i].Name);
worksheet.Cells[startRowIndex + i, 2].SetValue(employees[i].JobPosition.ToString());
worksheet.Cells[startRowIndex + i, 3].SetValue(employees[i].HireDate);
worksheet.Cells[startRowIndex + i, 4].SetValue(employees[i].Salary);
}
//Add a total salary row for each job position and one total row for all salaries.
worksheet.Cells[16, 1].SetValue("Developers' salaries");
worksheet.Cells[17, 1].SetValue("QAs' salaries");
worksheet.Cells[18, 1].SetValue("Managers' salaries");
worksheet.Cells[19, 1].SetValue("Total salaries");
worksheet.Cells[16, 4].SetValue("=SumIf(C7:C15,\"" + JobPosition.Developer.ToString() + "\",E7:E15)");
worksheet.Cells[17, 4].SetValue("=SumIf(C7:C15,\"" + JobPosition.QA.ToString() + "\",E7:E15)");
worksheet.Cells[18, 4].SetValue("=SumIf(C7:C15,\"" + JobPosition.Manager.ToString() + "\",E7:E15)");
worksheet.Cells[19, 4].SetValue("=Sum(E7:E15)");
//Add a document title.
CellSelection departmentNameCells = worksheet.Cells[1, 1, 1, 4];
departmentNameCells.Merge();
departmentNameCells.SetValue("Telerik Document Processing");
departmentNameCells.SetHorizontalAlignment(RadHorizontalAlignment.Left);
CellSelection salaryReportCells = worksheet.Cells[2, 1, 2, 4];
salaryReportCells.Merge();
salaryReportCells.SetValue("Salaries Report");
salaryReportCells.SetHorizontalAlignment(RadHorizontalAlignment.Right);
CellSelection periodCells = worksheet.Cells[3, 1, 3, 4];
periodCells.Merge();
periodCells.SetValue("for the Q2 2024 period");
periodCells.SetHorizontalAlignment(RadHorizontalAlignment.Right);
worksheet.Columns[worksheet.UsedCellRange].AutoFitWidth();
IWorkbookFormatProvider formatProvider = new XlsxFormatProvider();
string filePath = @"FinalSpreadsheet.xlsx";
using (FileStream output = new FileStream(filePath, FileMode.Create))
{
formatProvider.Export(workbook, output);
}
Process.Start(new ProcessStartInfo() { FileName = filePath, UseShellExecute = true });
}
private static List<Employee> PopulateWithData()
{
List<Employee> employees = new List<Employee>();
employees.Add(new Employee("Michael Brown", JobPosition.Developer, new DateTime(2005, 1, 20), 3400));
employees.Add(new Employee("James Hammer", JobPosition.Manager, new DateTime(2001, 2, 14), 4800));
employees.Add(new Employee("Amanda Johns", JobPosition.QA, new DateTime(2008, 7, 30), 2600));
employees.Add(new Employee("Daniel Bolton", JobPosition.Developer, new DateTime(2012, 4, 24), 2900));
employees.Add(new Employee("Lucas Smith", JobPosition.Manager, new DateTime(2007, 2, 12), 4100));
employees.Add(new Employee("George Stones", JobPosition.QA, new DateTime(2009, 5, 6), 2850));
employees.Add(new Employee("Victoria Sloane", JobPosition.Manager, new DateTime(2004, 8, 31), 3150));
employees.Add(new Employee("Patrick Holmes", JobPosition.Developer, new DateTime(2001, 9, 18), 4200));
employees.Add(new Employee("Thomas Porter", JobPosition.Developer, new DateTime(2006, 4, 12), 3450));
return employees;
}
public class Employee
{
public string Name { get; set; }
public JobPosition JobPosition { get; set; }
public DateTime HireDate { get; set; }
public double Salary { get; set; }
public Employee(string name, JobPosition jobPosition, DateTime hireDate, double salary)
{
this.Name = name;
this.JobPosition = jobPosition;
this.HireDate = hireDate;
this.Salary = salary;
}
}
public enum JobPosition
{
Developer,
QA,
Manager
}