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.v19.2.dll

Declaration

C#

public void RemoveAllRecursive(
    Predicate<T> match
)

VB.NET

Public Sub RemoveAllRecursive(
    match As Predicate(Of T)
)

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.

C#

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;
}

VB.NET

Imports DevExpress.Web.ASPxTreeView
... 
Protected Sub btn_RemoveCheckedNodes_Click(ByVal sender As Object, ByVal e As EventArgs)
     ASPxTreeView1.Nodes.RemoveAllRecursive(AddressOf IsChecked)
End Sub
Private Shared Function IsChecked(ByVal node As TreeViewNode) As Boolean
     Return node.Checked
End Function