The Tree List is a TreeView-Grid hybrid control that combines the power of the grid view with the hierarchical structure of the tree view.
It supports binding to data, unbound mode, child node loading on-demand, data editing, sorting, and more. Tree List is extremely useful for visualizing hierarchical data.

Task hierarchy - DevExperss ASP.NET TreeList
 EmployeeTask TitleDue DateTask TitleTask Priority
CollapseCarl LucasEmployee managment12/31/2014 12:00:00 AMAdministrationNormal
 CollapseFrancisco ChangEnterprise portal - software updating8/1/2013 12:00:00 AMTechnical DepartmentNormal
   Ana TrujilloDevelopment of technical tasks for the document archive9/8/2013 12:00:00 AMTechnical DepartmentHigh
   Hanna MoosDevelopment presentations "Whats new in SharePoint 2013"7/10/2013 12:00:00 AMInformation Technology DepartmentNormal
   Martín SommerDevelopment presentations "Whats new in SharePoint 2013"7/10/2013 12:00:00 AMInformation Technology DepartmentNormal
   Patricio SimpsonDevelopment of a web part "Nominated tasks"7/21/2013 12:00:00 AMInformation Technology DepartmentNormal
   Victoria AshworthDevelopment of technical tasks for the document archive9/8/2013 12:00:00 AMTechnical DepartmentHigh
   Thomas HardyPurchase of equipment7/31/2013 12:00:00 AMTechnical DepartmentNormal
   Ryan FischerDevelopment presentations "Whats new in SharePoint 2013"7/10/2013 12:00:00 AMInformation Technology DepartmentNormal
   Brad BarnesEnterprise portal - software updating8/1/2013 12:00:00 AMTechnical DepartmentNormal
 CollapseElizabeth LincolnThe preparation of financial statements8/1/2013 12:00:00 AMFinancial and Economic DepartmentHigh
   Maria AndersFamiliarization with the incoming document №5267/21/2013 12:00:00 AMFinancial and Economic DepartmentLow
   Pedro AfonsoFamiliarization with the incoming document №5277/17/2013 12:00:00 AMFinancial and Economic DepartmentLow
   Christina BerglundBonuses to employees on the half a year results7/31/2013 12:00:00 AMFinancial and Economic DepartmentNormal
   Lary FarmerFamiliarization with the incoming document №5277/17/2013 12:00:00 AMFinancial and Economic DepartmentLow
   Pedro AfonsoFamiliarization with the incoming document №5267/21/2013 12:00:00 AMFinancial and Economic DepartmentLow
 CollapseAndy BarrowRecruitment9/3/2013 12:00:00 AMAdministrative DepartmentNormal
   Antonio MorenoNew vacancy - HR manager9/1/2013 12:00:00 AMDepartment of personnel managementNormal
   Nicole SweetCreate a new organizational unit9/1/2013 12:00:00 AMAdministrative DepartmentNormal
   Tom HamlettNew vacancy - ASP.net Developer7/14/2013 12:00:00 AMDepartment of personnel managementHigh
   Jeffrey W McClainAcquaintance with the order №356-987/17/2013 12:00:00 AMAdministrative DepartmentLow
   Tom HamlettNew vacancy - C# Developer7/21/2013 12:00:00 AMDepartment of personnel managementNormal