[]
Gets or sets whether the data label number format is linked to the source cells.
If this property is true, changes to the number format in the source cells
are reflected in the data label.
bool NumberFormatLinked { get; set; }
Property NumberFormatLinked As Boolean
worksheet.Range["A1:B4"].Value = new object[,] {
{"Month", "Sales"},
{"Jan", 1200},
{"Feb", 1500},
{"Mar", 1100}
};
IChart chart = worksheet.Shapes.AddChart(ChartType.ColumnClustered, 20, 20, 360, 220).Chart;
chart.SeriesCollection.Add(worksheet.Range["B2:B4"]);
ISeries series = chart.SeriesCollection[0];
IDataLabel dataLabel = series.Points[0].DataLabel;
dataLabel.NumberFormatLinked = false;
bool linked = dataLabel.NumberFormatLinked;