[]
Gets or sets the range that contains the source data for the sparkline group.
Use this property to get or set the range reference string that identifies the cells used to generate the sparklines in the group.
string SourceData { get; set; }
Property SourceData As String
worksheet.Range["A1:C1"].Value = new object[] {1, 3, 2};
ISparklineGroup group = worksheet.Range["D1"].SparklineGroups.Add(SparkType.Line, "A1:C1");
string sourceData = group.SourceData;