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TreeList and TreeView Controls

The Eremex Controls library includes two data-aware controls to display hierarchical data in the form of a tree — TreeListControl and TreeViewControl. They render data source items as hierarchical nodes (rows).

TreeList control supports multiple columns:

treelist

TreeView control is a single-column component:

treeview

TreeListControl and TreeViewControl have one ancestor, so they share multiple features:

  • Data Binding — You can bind the controls to self-referential (flat) and hierarchical data sources.
  • Unbound Mode — Allows you to manually create the node structure.
  • Built-in Node Checkboxes — Allow you to select individual nodes.
  • Data Sorting — Allows you to sort sibling nodes in ascending or descending order. TreeList supports data sorting against one or multiple columns.
  • Node Images — Allow you to display custom images before cell values in the hierarchy column.
  • Styles — Allow you to customize the appearance settings of the controls' elements in various states.
  • Search Panel — Helps a user quickly locate nodes by the data they contain.
  • Data Edit Operations — The controls use default Eremex editors to present and edit cell values of common data types. You can embed custom editors in cells to render and edit cell values in a specific manner.
  • Data Validation — The validation mechanism helps you check a user's input and data source's values, and show errors in invalid cells.
  • Built-in and Custom Context Menus.
  • Data Annotation Attribute Support — The TreeList and TreeView controls take into account dedicated Data Annotation attributes applied to the data source's properties. You can use Data Annotation attributes to specify custom visibility, position, read-only state, and display name for auto-generated columns.

TreeList-specific features include:

  • Unbound Columns — You can add unbound columns (those that are not bound to data source fields) and populate them with data manually, using an event.
  • Column Resize and Drag-and-Drop Operations.
  • Column Chooser — Allows a user to access all columns, manage the column visibility, and rearrange the columns.
  • Auto Filter Row — A special row that allows a user to filter data against columns.
  • Column Header Templates – Allow you to display custom content in column headers, including images.
  • Multiple Node Selection (Highlight) — You can enable multiple node selection mode to allow a user to select (highlight) multiple nodes at one time.

Documentation