How to set the array of paths on TreeView With 'Linq'

Question

hi

this My Array

dim MyArray as string()={"D:\Folder1\File1.pdf","D:\Folder1\File2.pdf","D:\Folder2"}

Answer 1

Hi @Mansour_Dalir ,

Please check if the following code helps.

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load

        Dim MyArray As String() = {"D:\Folder1\File1.pdf", "D:\Folder1\File2.pdf", "D:\Folder2"}

        For Each path As String In MyArray
            AddPathToTreeView(path, TreeView1.Nodes)
        Next
    End Sub

    Private Sub AddPathToTreeView(path As String, nodes As TreeNodeCollection)
        Dim pathSegments As String() = path.Split("\"c)
        Dim currentNode As TreeNodeCollection = nodes

        For Each segment As String In pathSegments
            Dim existingNode As TreeNode = currentNode.Cast(Of TreeNode)().FirstOrDefault(Function(node) node.Text = segment)

            If existingNode Is Nothing Then
                Dim newNode As TreeNode = New TreeNode(segment)
                currentNode.Add(newNode)
                currentNode = newNode.Nodes
            Else
                currentNode = existingNode.Nodes
            End If
        Next
    End Sub

Best Regards.

Jiachen Li

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