Skip to main content
BuyLog In
Silverlight Controls
Search in…
Docs > Silverlight Controls > Controls > Data Grid > Concepts > Data Editing and Validation > Input Validation > Validating Nodes and Node Cells
All docs
V14.2
Silverlight Controls
What Is New
Installation and Demos
Common Concepts
Controls
Reporting
Data Grid
Product Information
Getting Started
Fundamentals
Concepts
Binding to Data
Master-Detail
Data Editing and Validation
Data Editing Overview
New Item Row
Inplace Editors
Input Validation
Input Validation Overview
Validating Editors
Validating Rows
Validating Nodes and Node Cells
Error Notification
Attributes-Based Validation
Editing in Code
Clipboard Operations
Data Formatting
Data Management
Data Scrolling
Focus and Navigation
Styles and Templates
MVVM Enhancements
End-User Interaction
Drag and Drop
Miscellaneous
Design-Time Features
End-User Capabilities
Visual Elements
Examples
AgDataGrid to DXGrid Migration Tables
Ribbon Controls
Toolbar-Menu
Chart Control
Pivot Grid
Scheduler
Rich Text Editor
Tree List
Gauge Controls
Map Control
Dock Windows
Tile and Layout
Printing-Exporting
Data Editors
Navigation Bar
Utility Controls
Spell Checker
LightSwitch Reporting
Localization
Redistribution and Deployment
Get More Help
API Reference

Validating Nodes and Node Cells

The TreeList View provides two event handlers allowing you to manually validate entire nodes as individual data cells. These events are:

Event Description
TreeListView.ValidateNode This event is automatically fired when a node is about to lose focus, allowing you to specify whether or not the focused node's data is valid, and whether the node can lose focus.
TreeListView.ValidateCell Occurs before the focused cell's modified value is posted to a data source, allowing you to manually validate its new value and specify whether or not the cell's editor can be closed.

These validation events provide properties allowing you to identify the processed node or cell, specify error type and content. To specify whether a node or cell contains invalid data, set the event parameter's IsValid property to false.