> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/powershell-universal/powershell-commands/new-udtreeview.md).

# New-UDTreeView

### Synopsis

Creates a new tree view.

### Syntax

```powershell
New-UDTreeView [[-Id] <String>] [-Node] <ScriptBlock> [[-OnNodeClicked] <Endpoint>] [[-Style] <Hashtable>] [[-ClassName] <String>] [-Expanded] [-PreventCollapse] [<CommonParameters>]
```

### Description

Creates a new tree view.

### Parameters

#### -Id

The ID of the component. It defaults to a random GUID.

```
Required?                    false
Position?                    1
Default value                [Guid]::NewGuid()
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false
```

#### -Node

A collection of root nodes to show within the tree view.

```
Required?                    true
Position?                    2
Default value
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false
```

#### -OnNodeClicked

A script block that is called when a node is clicked. $EventData will contain the node that was clicked.

```
Required?                    false
Position?                    3
Default value
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false
```

#### -Style

A set of CSS styles to apply to the tree view.

```
Required?                    false
Position?                    4
Default value
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false
```

#### -ClassName

A CSS className to apply to the tree view.

```
Required?                    false
Position?                    5
Default value
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false

    -Expanded [<SwitchParameter>]
        Whether the tree view should be expanded by default.

Required?                    false
Position?                    named
Default value                False
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false

    -PreventCollapse [<SwitchParameter>]
        Prevents the tree view from collapsing when a node is clicked. Assumes -Expanded.

Required?                    false
Position?                    named
Default value                False
Accept pipeline input?       false
Aliases
Accept wildcard characters?  false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer, PipelineVariable, and OutVariable. For more information, see
        about_CommonParameters (https://go.microsoft.com/fwlink/?LinkID=113216).
```

### Outputs

\-------------------------- EXAMPLE 1 --------------------------

```
PS >New-UDTreeView -Node {
PS >     New-UDTreeNode -Name "Root Node" -Id "root1" -Children {
PS >         New-UDTreeNode -Name "Child Node" -Id "child1" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node" -Id "grandchild1" -Leaf
PS >         }
PS >         New-UDTreeNode -Name "Child Node 2" -Id "child2" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node 2" -Id "grandchild2" -Leaf
PS >         }
PS >     }
PS > } -Id "treeview1"

Tree View|A basic tree view component.




-------------------------- EXAMPLE 2 --------------------------

PS >New-UDTreeView -Node {
PS >     New-UDTreeNode -Name "Root Node" -Id "root2" -Children {
PS >         New-UDTreeNode -Name "Child Node" -Id "child3" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node" -Id "grandchild3" -Leaf
PS >         }
PS >         New-UDTreeNode -Name "Child Node 2" -Id "child4" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node 2" -Id "grandchild4"
PS >         }
PS >     }
PS > } -Id "treeview2" -OnNodeClicked {
PS >     Show-UDToast -Message "You clicked $($EventData.Id)"
PS > }

OnNodeClicked|A tree view with an OnNodeClicked script block that shows a toast when a node is clicked.




-------------------------- EXAMPLE 3 --------------------------

PS >New-UDTreeView -Node {
PS >     New-UDTreeNode -Name "Root Node" -Id "root3" -Children {
PS >         New-UDTreeNode -Name "Child Node" -Id "child5" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node" -Id "grandchild5"  -Leaf
PS >         }
PS >         New-UDTreeNode -Name "Child Node 2" -Id "child6" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node 2" -Id "grandchild6"  -Leaf
PS >         }
PS >     }
PS > } -Id "treeview3" -Expanded

Expanded|A tree view that is expanded by default.




-------------------------- EXAMPLE 4 --------------------------

PS >New-UDTreeView -Node {
PS >     New-UDTreeNode -Name "Root Node" -Id "root4"
PS > } -Id "treeview4" -OnNodeClicked {
PS >     New-UDTreeNode -Name "Child Node"
PS > }

OnNodeClicked|A tree view with an OnNodeClicked script block that adds a child node when a node is clicked.




-------------------------- EXAMPLE 5 --------------------------

PS >New-UDTreeView -Node {
PS >     New-UDTreeNode -Name "Root Node" -Id "root5" -Children {
PS >         New-UDTreeNode -Name "Child Node" -Id "child7" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node" -Id "grandchild7" -Leaf -Icon (New-UDIcon -Icon "File")
PS >         } -Icon (New-UDIcon -Icon "Folder") -ExpandedIcon (New-UDIcon -Icon "FolderOpen")
PS >         New-UDTreeNode -Name "Child Node 2" -Id "child8" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node 2" -Id "grandchild8" -Leaf -Icon (New-UDIcon -Icon "File")
PS >         } -Icon (New-UDIcon -Icon "Folder") -ExpandedIcon (New-UDIcon -Icon "FolderOpen")
PS >     }
PS > } -Id "treeview5" -Expanded

Icons|A tree view with icons for nodes.




-------------------------- EXAMPLE 6 --------------------------

PS >New-UDTreeView -Node {
PS >     New-UDTreeNode -Name "Root Node" -Id "root6" -Children {
PS >         New-UDTreeNode -Name "Child Node" -Id "child9" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node" -Id "grandchild9"  -Leaf
PS >         }
PS >         New-UDTreeNode -Name "Child Node 2" -Id "child10" -Children {
PS >             New-UDTreeNode -Name "Grandchild Node 2" -Id "grandchild10"  -Leaf
PS >         }
PS >     }
PS > } -Id "treeview3" -Expanded -PreventCollapse

PreventCollapse|A tree view that is expanded by default and prevents collapsing when a node is clicked.
```


---

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