HierarchicalCollection<T>.RemoveAllRecursive(Predicate<T>) Method
Removes all items that match the conditions defined by the specified predicate from the hierarchical collection.
Namespace: DevExpress.Web
Assembly: DevExpress.Web.v24.1.dll
NuGet Package: DevExpress.Web
Declaration
Parameters
Name | Type | Description |
---|---|---|
match | Predicate<T> | A delegate that defines the conditions of the elements to remove. |
Remarks
The RemoveAllRecursive method individually passes elements of the current hierarchical collection to a predicate, and removes 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 remove checked nodes using the RemoveAllRecursive method. The IsChecked predicate determines whether a node is checked.
using DevExpress.Web.ASPxTreeView;
...
protected void btn_RemoveCheckedNodes_Click(object sender, EventArgs e) {
ASPxTreeView1.Nodes.RemoveAllRecursive(IsChecked);
}
private static bool IsChecked(TreeViewNode node) {
return node.Checked;
}