HierarchicalCollection<T>.FindAllRecursive(Predicate<T>) Method
Returns all elements that match the conditions defined by the specified predicate.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v18.2.dll
Declaration
Parameters
| Name | Type | Description |
|---|---|---|
| match | Predicate<T> | A delegate that defines the conditions of the elements to search for. |
Returns
| Type | Description |
|---|---|
| IEnumerable<T> | A collection of the elements that match the conditions defined by the predicate. |
Remarks
The FindAllRecursive method individually passes elements of the current hierarchical collection to a predicate, and returns a collection of elements that match the predicate. A predicate is a delegate to a method that returns true if the object passed to it matches the conditions defined in the delegate; otherwise the method returns false.
Example
The code sample below demonstrates how to get a collection of checked nodes on the server side. For this purpose, the FindAllRecursive method is used. The IsChecked predicate determines whether a node is checked.
using DevExpress.Web.ASPxTreeView;
...
IEnumerable<TreeViewNode> CheckNodeList = ASPxTreeView1.Nodes.FindAllRecursive(IsChecked);
...
private static bool IsChecked(TreeViewNode node) {
return node.Checked;
}