ASPxTreeList.DeleteNode(String) Method

Deletes the specified node.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v23.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public void DeleteNode(
    string nodeKey
)

VB.NET

Public Sub DeleteNode(
    nodeKey As String
)

Parameters

Name	Type	Description
nodeKey	String	A string value that identifies the node.

Remarks

Once the DeleteNode method is called, the ASPxTreeList.NodeDeleting event is raised. It allows you to cancel the delete operation. After a node has been deleted, the ASPxTreeList.NodeDeleted event is raised.

End-users can delete nodes using the Delete button.

To learn more, see Adding and Deleting Nodes.

Example

This example shows how to delete selected nodes.

The image below shows the result:

To learn more, see Adding and Deleting Nodes.

C#

using DevExpress.Web.ASPxTreeList;

protected void Page_Load(object sender, EventArgs e) {
    ASPxTreeList1.SettingsEditing.AllowRecursiveDelete = true;
}
protected void ASPxTreeList1_CustomCallback(object sender,
TreeListCustomCallbackEventArgs e) {
    foreach (TreeListNode node in ASPxTreeList1.GetSelectedNodes())
        ASPxTreeList1.DeleteNode(node.Key);
    ASPxTreeList1.DataBind();
}

VB.NET

Imports DevExpress.Web.ASPxTreeList

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    ASPxTreeList1.SettingsEditing.AllowRecursiveDelete = True
End Sub

Protected Sub ASPxTreeList1_CustomCallback(ByVal sender As Object, _
ByVal e As TreeListCustomCallbackEventArgs)
    For Each node As TreeListNode In ASPxTreeList1.GetSelectedNodes()
        ASPxTreeList1.DeleteNode(node.Key)
    Next node
    ASPxTreeList1.DataBind()
End Sub

ASPX

<dxe:ASPxButton ID="ASPxButton1" runat="server" AutoPostBack="False"
    CssFilePath="~/App_Themes/Glass/{0}/styles.css"
    CssPostfix="Glass" OnClick="ASPxButton1_Click" Text="Delete Selected"
    EnableClientSideAPI="True">
    <ClientSideEvents Click="function(s, e) {
        treeList.PerformCallback('');
    }" />
</dxe:ASPxButton>