TreeList.GetAllCheckedNodes() Method

Returns the list of checked nodes.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v24.1.dll

NuGet Packages: DevExpress.Win.Navigation, DevExpress.Win.TreeList

Declaration

C#

public List<TreeListNode> GetAllCheckedNodes()

VB.NET

Public Function GetAllCheckedNodes As List(Of TreeListNode)

Returns

Type	Description
List<TreeListNode>	The list of checked nodes.

Remarks

A node is checked if its TreeListNode.Checked property is true. The list returned by the GetAllCheckedNodes method does not include nodes with the indeterminate check state.

Example

The following code shows how to retrieve checked nodes using the TreeList.GetAllCheckedNodes method, and modify their values.

C#

List<TreeListNode> list = treeList1.GetAllCheckedNodes();
foreach (TreeListNode node in list) {
    decimal budget = Convert.ToDecimal(node["BUDGET"])*1.1m;
    node["BUDGET"] = budget;
}

VB.NET

Dim list As List(Of TreeListNode) = treeList1.GetAllCheckedNodes()
For Each node As TreeListNode In list
    Dim budget As Decimal = Convert.ToDecimal(node("BUDGET")) * 1.1D
    node("BUDGET") = budget
Next

Example

The following example shows how to use a node iterator to retrieve unchecked TreeList nodes.

C#

using DevExpress.XtraTreeList.Nodes.Operations;

GetUncheckedNodesOperation op = new GetUncheckedNodesOperation();
treeList1.NodesIterator.DoOperation(op);
//Get the number of unchecked nodes:
int count = op.TargetNodes.Count;

//The operation class that collects unchecked nodes
class GetUncheckedNodesOperation : TreeListOperation {
    public List<TreeListNode> TargetNodes = new List<TreeListNode>();
    public GetUncheckedNodesOperation() : base() { }
    public override void Execute(TreeListNode node) {
        if (node.CheckState == CheckState.Unchecked)
            TargetNodes.Add(node);
    }
}

VB.NET

Imports DevExpress.XtraTreeList.Nodes.Operations
Imports DevExpress.XtraTreeList.Nodes

Dim op As GetUncheckedNodesOperation = New GetUncheckedNodesOperation()
treeList1.NodesIterator.DoOperation(op)
'Get the number of unchecked nodes:
Dim count As Integer = op.TargetNodes.Count

'The operation class that collects unchecked nodes
Friend Class GetUncheckedNodesOperation
    Inherits TreeListOperation
    Public TargetNodes As List(Of TreeListNode) = New List(Of TreeListNode)()
    Public Sub New()
        MyBase.New()
    End Sub
    Public Overrides Sub Execute(ByVal node As TreeListNode)
        If node.CheckState = CheckState.Unchecked Then
            TargetNodes.Add(node)
        End If
    End Sub
End Class

See Node Checking - Checkboxes and Radio Buttons to learn more.

Example

The following code shows how to retrieve checked nodes using the TreeList.GetAllCheckedNodes method, and modify their values.

C#

List<TreeListNode> list = treeList1.GetAllCheckedNodes();
foreach (TreeListNode node in list) {
    decimal budget = Convert.ToDecimal(node["BUDGET"])*1.1m;
    node["BUDGET"] = budget;
}

VB.NET

Dim list As List(Of TreeListNode) = treeList1.GetAllCheckedNodes()
For Each node As TreeListNode In list
    Dim budget As Decimal = Convert.ToDecimal(node("BUDGET")) * 1.1D
    node("BUDGET") = budget
Next