windowsforms-devexpress-dot-xtratreelist-dot-treelistoptionsbehavior-6c1bc4e4.md
Gets or sets whether an end-user can switch a node to the indeterminate check state with a mouse click.
Namespace : DevExpress.XtraTreeList
Assembly : DevExpress.XtraTreeList.v25.2.dll
NuGet Packages : DevExpress.Win.Navigation, DevExpress.Win.TreeList
[DefaultValue(false)]
[XtraSerializableProperty]
public virtual bool AllowIndeterminateCheckState { get; set; }
<DefaultValue(False)>
<XtraSerializableProperty>
Public Overridable Property AllowIndeterminateCheckState As Boolean
| Type | Default | Description |
|---|---|---|
| Boolean | false |
true if an end-user can switch a node to the indeterminate check state; otherwise, false.
|
You can access this nested property as listed below:
| Object Type | Path to AllowIndeterminateCheckState |
|---|---|
| TreeList |
.OptionsBehavior .AllowIndeterminateCheckState
|
An end-user can switch node states by clicking the check box. If the AllowIndeterminateCheckState property is disabled, a click on the check box changes the node’s state between checked and unchecked. If the AllowIndeterminateCheckState property’s value is true, successive clicks on the check box switch between three states: checked, unchecked and indeterminate.
Regardless of the AllowIndeterminateCheckState , you can apply the indeterminate state to a node in code, using the TreeListNode.CheckState property.
To learn how to enable the node checking feature, see Node Checking - Checkboxes and Radio Buttons.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the AllowIndeterminateCheckState property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
winforms-treelist-custom-check-nodes-behavior/CS/Example/TreeListCheckHelper.cs#L15
treeList.OptionsView.ShowCheckBoxes = true;
treeList.OptionsBehavior.AllowIndeterminateCheckState = false;
treeList.BeforeCheckNode += treeList1_BeforeCheckNode;
winforms-treelist-custom-check-nodes-behavior/VB/Example/TreeListCheckHelper.vb#L13
treeList.OptionsView.ShowCheckBoxes = True
treeList.OptionsBehavior.AllowIndeterminateCheckState = False
AddHandler treeList.BeforeCheckNode, AddressOf treeList1_BeforeCheckNode
See Also
Node Checking - Checkboxes and Radio Buttons