> For the complete documentation index, see [llms.txt](https://docs.wisej.com/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewcanceleventargs.md).

# TreeViewCancelEventArgs

Namespace: **Wisej.Web**

Assembly: **Wisej.Framework** (4.0.0.0)

Provides data for the [BeforeCheck](/api/wisej.web/lists-and-grids/treeview.md#beforecheck), [BeforeCollapse](/api/wisej.web/lists-and-grids/treeview.md#beforecollapse), [BeforeExpand](/api/wisej.web/lists-and-grids/treeview.md#beforeexpand), and [BeforeSelect](/api/wisej.web/lists-and-grids/treeview.md#beforeselect) events of a [TreeView](/api/wisej.web/lists-and-grids/treeview.md) control.

{% tabs %}
{% tab title="C#" %}

```csharp
public class TreeViewCancelEventArgs : CancelEventArgs
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Class TreeViewCancelEventArgs
    Inherits CancelEventArgs
```

{% endtab %}
{% endtabs %}

## Constructors

### ![](/files/hsR4ok3152WyAf8J2C1u) TreeViewCancelEventArgs(node, cancel, action)

Initializes a new instance of the [TreeViewCancelEventArgs](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewcanceleventargs.md) class with the specified tree node, a value specifying whether the event is to be canceled, and the type of tree view action that raised the event.

| Name       | Type                                                                                  | Description                                                                                                                                                  |
| ---------- | ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **node**   | [TreeNode](/api/wisej.web/lists-and-grids/treeview/wisej.web.treenode.md)             | The [TreeNode](/api/wisej.web/lists-and-grids/treeview/wisej.web.treenode.md) that the event is responding to.                                               |
| **cancel** | [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean)                       | true to cancel the event; otherwise, false.                                                                                                                  |
| **action** | [TreeViewAction](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewaction.md) | One of the [TreeViewAction](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewaction.md) values indicating the type of action that raised the event. |

### ![](/files/hsR4ok3152WyAf8J2C1u) TreeViewCancelEventArgs(nodes, cancel, action)

Initializes a new instance of the [TreeViewCancelEventArgs](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewcanceleventargs.md) class with the specified tree node, a value specifying whether the event is to be canceled, and the type of tree view action that raised the event.

| Name       | Type                                                                                  | Description                                                                                                                                                  |
| ---------- | ------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **nodes**  | [TreeNode\[\]](/api/wisej.web/lists-and-grids/treeview/wisej.web.treenode.md)         | An array of [TreeNode](/api/wisej.web/lists-and-grids/treeview/wisej.web.treenode.md) that the event is responding to.                                       |
| **cancel** | [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean)                       | true to cancel the event; otherwise, false.                                                                                                                  |
| **action** | [TreeViewAction](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewaction.md) | One of the [TreeViewAction](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewaction.md) values indicating the type of action that raised the event. |

## Properties

### ![](/files/hsR4ok3152WyAf8J2C1u) Action

[TreeViewAction](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewaction.md): Returns the type of action that raised the event.

### ![](/files/hsR4ok3152WyAf8J2C1u) Node

[TreeNode](/api/wisej.web/lists-and-grids/treeview/wisej.web.treenode.md): Returns the tree node that has been checked, expanded, collapsed, or selected.

### ![](/files/hsR4ok3152WyAf8J2C1u) Nodes

[TreeNode\[\]](/api/wisej.web/lists-and-grids/treeview/wisej.web.treenode.md): Returns the tree nodes that has been selected in a multiselection treeview.

## Used By

| Name                                                                                                          | Description                                                                                                                                                                                                                                                                                                                                                                                                           |
| ------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [TreeViewCancelEventHandler](/api/wisej.web/lists-and-grids/treeview/wisej.web.treeviewcanceleventhandler.md) | Represents the method that will handle the [BeforeCheck](/api/wisej.web/lists-and-grids/treeview.md#beforecheck), [BeforeCollapse](/api/wisej.web/lists-and-grids/treeview.md#beforecollapse), [BeforeExpand](/api/wisej.web/lists-and-grids/treeview.md#beforeexpand), or [BeforeSelect](/api/wisej.web/lists-and-grids/treeview.md#beforeselect) event of a [TreeView](/api/wisej.web/lists-and-grids/treeview.md). |


---

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