ColdFusion Developer's Guide

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Binding controls to grid contents
You can bind the contents of a form control to the data in a grid field by specifying a bind
parameter as the form control attribute value. To do so, use the syntax such as the following:
By default, each time the selected row in the grid changes, the bind parameter is reevaluated
and the control value changes to the value of the specified column of selected grid cell.
Grid JavaScript functions
You can use the following JavaScript functions to manage an HTML format grid:
Function Description
ColdFusion.Grid.getGridObject Gets the underlying Ext JS JavaScript library object.
ColdFusion.Grid.refresh Manually refreshes a displayed grid.
ColdFusion.Grid.sort Sorts the grid.
For more information on these functions, see CFML Reference.
Using HTML format trees
An HTML format cftree tag creates an AJAX-based tree data representation that you can
populate from a query or a bind expression. The behavior with a query is equivalent to that of
applet or Flash format trees. Bind expressions let you populate the tree based on the values of
other controls or Spry data sets. Additionally, when you use a bind expression, the tree loads
dynamically, getting only the data required for the current display.
Populating the tree using a bind expression
You can use the bind attribute and bind expressions to dynamically and incrementally load
and display tree data as the user navigates the tree. The child tree items do not exist until the
parent node expands. This behavior prevents the need to prefill a tree with large amounts of
data, lets the tree children change dynamically (you can optionally get the children each time
the item expands), and can enhance application responsiveness.
This section provides tree-specific binding information only. For detailed information on
binding in general and bind parameter formats and their use, see Chapter 34, “Using AJAX
Data and Development Features” in CFML Reference.
912 Using AJAX UI Components and Features