public ExcelPackage GenerateExcelReport(ICollection <SampleEntity> sampleEntities, ICollection <AnotherSampleEntity> anotherSampleEntities, ICollection <OtherSampleEntity> otherSampleEntities)
{
ReportGenerator reportGenerator = new ReportGenerator();
#region Worksheet sample 1
reportGenerator.CreateWorksheet("SampleTable1");
WorksheetColumns worksheetColumns1 = new WorksheetColumns();
worksheetColumns1.AddColumn <SampleEntity, int>("Id", e => e.Id <= 5 || e.Id > 15 ? e.Id : 0);
worksheetColumns1.AddColumn <SampleEntity, string>("Name", e => e.Name != null ? "DefaultName" : e.Name);
worksheetColumns1.AddColumn <SampleEntity, DateTime>("Register Date", e => e.RegisterDate);
worksheetColumns1.AddColumn <SampleEntity, string>("City", e => e.AnotherSampleEntity.City ?? "DefaultCity");
worksheetColumns1.AddColumn <SampleEntity, string>("State", e => e.AnotherSampleEntity.State);
worksheetColumns1.AddColumn <SampleEntity, string>("Country", e => e.AnotherSampleEntity.Country);
worksheetColumns1.AddColumn <SampleEntity, string>("Active", e => e.AnotherSampleEntity.Active ? "Active" : "Inactive");
reportGenerator.AddColumnsToWorksheet("SampleTable1", worksheetColumns1);
reportGenerator.AddDataToWorksheet("SampleTable1", sampleEntities);
#endregion Worksheet sample 1
#region Worksheet sample 2
WorksheetColumns worksheetColumns2 = new WorksheetColumns();
worksheetColumns2.AddColumn <AnotherSampleEntity, string>("City", e => e.City);
worksheetColumns2.AddColumn <AnotherSampleEntity, string>("State", e => e.State);
worksheetColumns2.AddColumn <AnotherSampleEntity, string>("Country", e => e.Country);
reportGenerator.CreateWorksheet("SampleTable2", worksheetColumns2);
reportGenerator.AddDataToWorksheet("SampleTable2", anotherSampleEntities);
#endregion Worksheet sample 2
#region Worksheet sample 3
reportGenerator.CreateWorksheet("Other Sample Table");
WorksheetColumns worksheetColumns3 = new WorksheetColumns();
worksheetColumns3.AddColumn("Entity Id", typeof(int));
worksheetColumns3.AddColumn("Name", typeof(string));
worksheetColumns3.AddColumn("City", typeof(string));
worksheetColumns3.AddColumn("State", typeof(string));
worksheetColumns3.AddColumn("Country", typeof(string));
worksheetColumns3.AddColumn("Active", typeof(string));
reportGenerator.AddColumnsToWorksheet("Other Sample Table", worksheetColumns3);
AddDataToExcel(reportGenerator, "Other Sample Table", otherSampleEntities);
#endregion Worksheet sample 3
#region Worksheet sample 4
reportGenerator.CreateWorksheet("Other Sample Table");
WorksheetColumns worksheetColumns4 = new WorksheetColumns();
worksheetColumns2.AddColumn <OtherSampleEntity, int>("Entity Id", e => e.Id);
worksheetColumns2.AddColumn <OtherSampleEntity, string>("Name", e => e.Name);
worksheetColumns4.JoinCollection <OtherSampleEntity, AnotherSampleEntity>(e => e.AnotherSampleEntities)
.AddColumn <AnotherSampleEntity, string>("City", e => e.City);
worksheetColumns4.JoinCollection <OtherSampleEntity, AnotherSampleEntity>(e => e.AnotherSampleEntities)
.AddColumn <AnotherSampleEntity, string>("State", e => e.State);
worksheetColumns4.JoinCollection <OtherSampleEntity, AnotherSampleEntity>(e => e.AnotherSampleEntities)
.AddColumn <AnotherSampleEntity, string>("Country", e => e.Country);
worksheetColumns4.JoinCollection <OtherSampleEntity, AnotherSampleEntity>(e => e.AnotherSampleEntities)
.AddColumn <AnotherSampleEntity, string>("Active", e => e.Active ? "Active" : "Inactive");
reportGenerator.AddColumnsToWorksheet("Other Sample Table", worksheetColumns3);
AddDataToExcel(reportGenerator, "Other Sample Table", otherSampleEntities);
#endregion Worksheet sample 4
return(reportGenerator.GenerateExcelPackage(saveFormattedData: true));
}