Getting Notifications while Merging Data with Smart Markers

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The following piece of code demonstrates the usage of ISmartMarkerCallBack interface to define a new class that handles the call back for WorkbookDesigner.Process method.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
class SmartMarkerCallBack: ISmartMarkerCallBack
{
Workbook workbook;
public SmartMarkerCallBack(Workbook workbook) {
this.workbook = workbook;
}
public void Process(int sheetIndex, int rowIndex, int colIndex, String tableName, String columnName) {
Console.WriteLine("Processing Cell: " + workbook.Worksheets[sheetIndex].Name + "!" + CellsHelper.CellIndexToName(rowIndex, colIndex));
Console.WriteLine("Processing Marker: " + tableName + "." + columnName);
}
}

Rest of the process includes loading designer spreadsheet containing the Smart Markers with WorkbookDesigner and process it by setting the data source. In order to keep the example simple, we have used a predefined designer spreadsheet containing only two Smart Markers as shown in the below snapshot where the data source is being created dynamically to merge the data according to the specified Smart Markers.

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// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
string outputPath = dataDir + "Output.out.xlsx";
// Creating a DataTable that will serve as data source for designer spreadsheet
DataTable table = new DataTable("OppLineItems");
table.Columns.Add("PRODUCT_FAMILY");
table.Columns.Add("OPPORTUNITY_LINEITEM_PRODUCTNAME");
table.Rows.Add(new object[] { "MMM", "P1" });
table.Rows.Add(new object[] { "MMM", "P2" });
table.Rows.Add(new object[] { "DDD", "P1" });
table.Rows.Add(new object[] { "DDD", "P2" });
table.Rows.Add(new object[] { "AAA", "P1" });
// Loading the designer spreadsheet in an instance of Workbook
Workbook workbook = new Workbook(dataDir + "source.xlsx");
// Loading the instance of Workbook in an instance of WorkbookDesigner
WorkbookDesigner designer = new WorkbookDesigner(workbook);
// Set the WorkbookDesigner.CallBack property to an instance of newly created class
designer.CallBack = new SmartMarkerCallBack(workbook);
// Set the data source
designer.SetDataSource(table);
// Process the Smart Markers in the designer spreadsheet
designer.Process(false);
// Save the result
workbook.Save(outputPath);