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# New-UDTreeView

New-UDTreeView crea un albero gerarchico di elementi New-UDTreeNode espandibili in PowerShell Universal per esplorare strutture di dati annidate.

### Sinossi

Crea una nuova vista ad albero.

### Sintassi

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

### Descrizione

Crea una nuova vista ad albero.

### Parametri

#### -Id

L'ID del componente. Per impostazione predefinita è un GUID casuale.

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

#### -Node

Una raccolta di nodi radice da mostrare all'interno della vista ad albero.

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

#### -OnNodeClicked

Un blocco di script che viene chiamato quando si fa clic su un nodo. $EventData conterrà il nodo su cui si è fatto clic.

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

#### -Style

Un insieme di stili CSS da applicare alla vista ad albero.

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

#### -ClassName

Un className CSS da applicare alla vista ad albero.

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

#### -Expanded

Indica se la vista ad albero deve essere espansa per impostazione predefinita.

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

#### -PreventCollapse

Impedisce che la vista ad albero si comprima quando si fa clic su un nodo. Presuppone -Expanded.

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

#### Parametri comuni

Questo cmdlet supporta i parametri comuni: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, WarningVariable, OutBuffer, PipelineVariable e OutVariable. Per maggiori informazioni, veda [about\_CommonParameters](https://go.microsoft.com/fwlink/?LinkID=113216).

### Output

### Esempi

#### Esempio 1: vista ad albero

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

Un componente di base per la vista ad albero.

#### Esempio 2: OnNodeClicked

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

Una vista ad albero con un blocco di script OnNodeClicked che mostra un toast quando si fa clic su un nodo.

#### Esempio 3: Expanded

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

Una vista ad albero espansa per impostazione predefinita.

#### Esempio 4: OnNodeClicked

```powershell
New-UDTreeView -Node {
    New-UDTreeNode -Name "Root Node" -Id "root4"
} -Id "treeview4" -OnNodeClicked {
    New-UDTreeNode -Name "Child Node"
}
```

Una vista ad albero con un blocco di script OnNodeClicked che aggiunge un nodo figlio quando si fa clic su un nodo.

#### Esempio 5: icone

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

Una vista ad albero con icone per i nodi.

#### Esempio 6: PreventCollapse

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

Una vista ad albero espansa per impostazione predefinita che impedisce la compressione quando si fa clic su un nodo.


---

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