Create Dynamic Charts

Using Excel Tables

ListObjects provides the in-built functionality to sort & filter the data upon user interaction. Both sorting & filtering options are provided through the drop-down lists which are automatically added to the header row of the ListObject. Due to these features (sorting & filtering), the ListObject seems to be the perfect candidate to serve as the data source to a dynamic chart because when sorting or filtering is changed, the representation of data in the chart will be changed to reflect the current state of the ListObject.

In order to keep the demonstration simple to understand, we will create the Workbook from scratch and move forward step by step as outlined below.

  1. Create an empty Workbook.
  2. Access the Cells of the first Worksheet in the Workbook.
  3. Insert some data to the cells.
  4. Create ListObject based on the inserted data.
  5. Create Chart based on the data range of ListObject.
  6. Save the result on the disc.
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Create an instance of Workbook
var book = new Workbook();
// Access first worksheet from the collection
var sheet = book.Worksheets[0];
// Access cells collection of the first worksheet
var cells = sheet.Cells;
// Insert data column wise
cells["A1"].PutValue("Category");
cells["A2"].PutValue("Fruit");
cells["A3"].PutValue("Fruit");
cells["A4"].PutValue("Fruit");
cells["A5"].PutValue("Fruit");
cells["A6"].PutValue("Vegetables");
cells["A7"].PutValue("Vegetables");
cells["A8"].PutValue("Vegetables");
cells["A9"].PutValue("Vegetables");
cells["A10"].PutValue("Beverages");
cells["A11"].PutValue("Beverages");
cells["A12"].PutValue("Beverages");
cells["B1"].PutValue("Food");
cells["B2"].PutValue("Apple");
cells["B3"].PutValue("Banana");
cells["B4"].PutValue("Apricot");
cells["B5"].PutValue("Grapes");
cells["B6"].PutValue("Carrot");
cells["B7"].PutValue("Onion");
cells["B8"].PutValue("Cabage");
cells["B9"].PutValue("Potatoe");
cells["B10"].PutValue("Coke");
cells["B11"].PutValue("Coladas");
cells["B12"].PutValue("Fizz");
cells["C1"].PutValue("Cost");
cells["C2"].PutValue(2.2);
cells["C3"].PutValue(3.1);
cells["C4"].PutValue(4.1);
cells["C5"].PutValue(5.1);
cells["C6"].PutValue(4.4);
cells["C7"].PutValue(5.4);
cells["C8"].PutValue(6.5);
cells["C9"].PutValue(5.3);
cells["C10"].PutValue(3.2);
cells["C11"].PutValue(3.6);
cells["C12"].PutValue(5.2);
cells["D1"].PutValue("Profit");
cells["D2"].PutValue(0.1);
cells["D3"].PutValue(0.4);
cells["D4"].PutValue(0.5);
cells["D5"].PutValue(0.6);
cells["D6"].PutValue(0.7);
cells["D7"].PutValue(1.3);
cells["D8"].PutValue(0.8);
cells["D9"].PutValue(1.3);
cells["D10"].PutValue(2.2);
cells["D11"].PutValue(2.4);
cells["D12"].PutValue(3.3);
// Create ListObject, Get the List objects collection in the first worksheet
var listObjects = sheet.ListObjects;
// Add a List based on the data source range with headers on
var index = listObjects.Add(0, 0, 11, 3, true);
sheet.AutoFitColumns();
// Create chart based on ListObject
index = sheet.Charts.Add(ChartType.Column, 21, 1, 35, 18);
var chart = sheet.Charts[index];
chart.SetChartDataRange("A1:D12", true);
chart.NSeries.CategoryData = "A2:B12";
// Save spreadsheet
book.Save(dataDir + "output_out.xlsx");

Using Dynamic Formulas

In case you do not wish to use the ListObject as a data source to the dynamic chart, the other option is to use Excel functions (or formulas) to create a dynamic range of data, and a control (such as ComboBox) to trigger the change in data. In this scenario, we will use the VLOOKUP function to fetch the appropriate values based on the selection of ComboBox. When selection is changed, the VLOOKUP function will refresh the cell value. If a range of cells is using the VLOOKUP function, the whole range can be refreshed upon user interaction, therefore it can be used as a source to the dynamic chart.

In order to keep the demonstration simple to understand, we will create the Workbook from scratch and move forward step by step as outlined below.

  1. Create an empty Workbook.
  2. Access the Cells of the first Worksheet in the Workbook.
  3. Insert some data to the cells by creating a Named Range. This data will serve as a series to the dynamic chart.
  4. Create ComboBox based on the Named Range created in the previous step.
  5. Insert some more data to the cells that will serve as a source to the VLOOKUP function.
  6. Insert VLOOKUP function (with appropriate parameters) to a range of cells. This will range will serve as a source to the dynamic chart.
  7. Create Chart based on the range created in the previous step.
  8. Save the result on the disc.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Create a workbook object
var workbook = new Workbook();
// Get the first worksheet
var worksheet = workbook.Worksheets[0];
// Create a range in the second worksheet
var range = worksheet.Cells.CreateRange("C21", "C24");
// Name the range
range.Name = "MyRange";
// Fill different cells with data in the range
range[0, 0].PutValue("North");
range[1, 0].PutValue("South");
range[2, 0].PutValue("East");
range[3, 0].PutValue("West");
ComboBox comboBox = worksheet.Shapes.AddComboBox(15, 0, 2, 0, 17, 64);
comboBox.InputRange = "=MyRange";
comboBox.LinkedCell = "=B16";
comboBox.SelectedIndex = 0;
Cell cell = worksheet.Cells["B16"];
Style style = cell.GetStyle();
style.Font.Color = Color.White;
cell.SetStyle(style);
worksheet.Cells["C16"].Formula = "=INDEX(Sheet1!$C$21:$C$24,$B$16,1)";
// Put some data for chart source
// Data Headers
worksheet.Cells["D15"].PutValue("Jan");
worksheet.Cells["D20"].PutValue("Jan");
worksheet.Cells["E15"].PutValue("Feb");
worksheet.Cells["E20"].PutValue("Feb");
worksheet.Cells["F15"].PutValue("Mar");
worksheet.Cells["F20"].PutValue("Mar");
worksheet.Cells["G15"].PutValue("Apr");
worksheet.Cells["G20"].PutValue("Apr");
worksheet.Cells["H15"].PutValue("May");
worksheet.Cells["H20"].PutValue("May");
worksheet.Cells["I15"].PutValue("Jun");
worksheet.Cells["I20"].PutValue("Jun");
// Data
worksheet.Cells["D21"].PutValue(304);
worksheet.Cells["D22"].PutValue(402);
worksheet.Cells["D23"].PutValue(321);
worksheet.Cells["D24"].PutValue(123);
worksheet.Cells["E21"].PutValue(300);
worksheet.Cells["E22"].PutValue(500);
worksheet.Cells["E23"].PutValue(219);
worksheet.Cells["E24"].PutValue(422);
worksheet.Cells["F21"].PutValue(222);
worksheet.Cells["F22"].PutValue(331);
worksheet.Cells["F23"].PutValue(112);
worksheet.Cells["F24"].PutValue(350);
worksheet.Cells["G21"].PutValue(100);
worksheet.Cells["G22"].PutValue(200);
worksheet.Cells["G23"].PutValue(300);
worksheet.Cells["G24"].PutValue(400);
worksheet.Cells["H21"].PutValue(200);
worksheet.Cells["H22"].PutValue(300);
worksheet.Cells["H23"].PutValue(400);
worksheet.Cells["H24"].PutValue(500);
worksheet.Cells["I21"].PutValue(400);
worksheet.Cells["I22"].PutValue(200);
worksheet.Cells["I23"].PutValue(200);
worksheet.Cells["I24"].PutValue(100);
// Dynamically load data on selection of Dropdown value
worksheet.Cells["D16"].Formula = "=IFERROR(VLOOKUP($C$16,$C$21:$I$24,2,FALSE),0)";
worksheet.Cells["E16"].Formula = "=IFERROR(VLOOKUP($C$16,$C$21:$I$24,3,FALSE),0)";
worksheet.Cells["F16"].Formula = "=IFERROR(VLOOKUP($C$16,$C$21:$I$24,4,FALSE),0)";
worksheet.Cells["G16"].Formula = "=IFERROR(VLOOKUP($C$16,$C$21:$I$24,5,FALSE),0)";
worksheet.Cells["H16"].Formula = "=IFERROR(VLOOKUP($C$16,$C$21:$I$24,6,FALSE),0)";
worksheet.Cells["I16"].Formula = "=IFERROR(VLOOKUP($C$16,$C$21:$I$24,7,FALSE),0)";
// Create Chart
int index = worksheet.Charts.Add(ChartType.Column, 0, 3, 12, 9);
Chart chart = worksheet.Charts[index];
chart.NSeries.Add("='Sheet1'!$D$16:$I$16", false);
chart.NSeries[0].Name = "=C16";
chart.NSeries.CategoryData = "=$D$15:$I$15";
// Save result on disc
workbook.Save(dataDir + "output_out.xlsx");