Excel · C# walkthrough
Six-week workload trend
Read the source figures and their trend together. A chart helps show direction while the adjacent values keep the calculation inspectable.
Opens the generated download in a local browser tool. The C# example below creates the document.
- Start with
- Six weekly received and resolved counts
- Generate
- XLSX

How it works
Write the weekly values
Create a table with week labels, received counts, resolved counts and a formula for net change.
Link the chart to the range
Call AddChartFromRange with the labels and both series, choose a line chart and position it below the data.
Render a useful review range
Calculate formulas and export a range that includes both the table and chart.
The C# source
The example below shows the document API and layout used for this report. Follow the Excel guide for package setup in your own project.
using OfficeIMO.Drawing;
using OfficeIMO.Excel;
namespace OfficeIMO.Examples.Showcase.Workflows;
/// <summary>Builds a six-week workload chart from editable worksheet values.</summary>
internal static class OperationalTrends {
internal static void Create(string folder) {
using ExcelDocument document = ExcelDocument.Create(Path.Combine(folder, "example.xlsx"));
var sheet = document.AddSheet("Weekly trend");
sheet.SetColumnWidth(1, ExcelColumnWidth.Characters(26)); sheet.SetColumnWidth(2, ExcelColumnWidth.Characters(24)); sheet.SetColumnWidth(3, ExcelColumnWidth.Characters(24)); sheet.SetColumnWidth(4, ExcelColumnWidth.Characters(22));
sheet.Range("A1:D1").Merge(); sheet.Cell(1, 1).SetValue("Support workload over six weeks");
sheet.Cell(1, 1).SetFontSize(global::OfficeIMO.OfficeLength.Points(20)); sheet.Cell(1, 1).SetBold(true); sheet.Cell(1, 1).SetFontColor("17365D");
string[] headers = { "Week", "Received", "Resolved", "Net change" };
for (int column = 1; column <= 4; column++) sheet.Cell(4, column).SetValue(headers[column - 1]);
int[] received = { 82, 95, 88, 105, 97, 91 }, resolved = { 79, 90, 94, 98, 104, 100 };
for (int index = 0; index < received.Length; index++) {
int row = index + 5;
sheet.Cell(row, 1).SetValue("Week " + (index + 1)); sheet.Cell(row, 2).SetValue(received[index]); sheet.Cell(row, 3).SetValue(resolved[index]);
sheet.Cell(row, 4).SetFormula($"B{row}-C{row}");
}
sheet.AddTable("A4:D10", hasHeader: true, name: "WeeklyWorkload", style: ExcelTableStyle.TableStyleMedium2);
sheet.AddChart(OfficeChartType.Line, "A4:C10", new OfficeIMO.Excel.ExcelChartOptions { Row = 13, Column = 1, Width = OfficeLength.Pixels(620), Height = OfficeLength.Pixels(300), Title = "Received and resolved requests" });
document.Calculate();
sheet.Range("A1:D30").ExportImage(OfficeImageExportFormat.Png).Save(Path.Combine(folder, "preview.png"), OfficeImageExportFileConflictPolicy.Replace);
document.Save();
}
}
Open the C# source fileAPI used in this example
Use this in your project
Use equal time windows and consistent definitions when replacing the sample data. Net change describes flow; include starting backlog if you need a backlog total.
The Excel guide explains package setup and related document APIs.
Documents and scope
What the preview shows
The linked C# example generates this file. The runner reopens and validates the XLSX and checks supported formulas, cached results and dependencies. The PNG is a native worksheet-range export.
What to keep in mind
The values are synthetic. The image is OfficeIMO's native worksheet rendering; desktop Excel chart appearance can differ.