TreeNodeCollection

Wisej.Web.TreeNodeCollection

Namespace: Wisej.Web

Assembly: Wisej.Framework (2.2.0.0)

Represents a collection of TreeNode objects.

C#

public class TreeNodeCollection : IList, ICollection, IEnumerable, IList<TreeNode>, ICollection<TreeNode>, IEnumerable<TreeNode>

VB.NET

Properties

Count

Int32: Returns the total number of TreeNode objects in the collection.

IsReadOnly

Boolean: Returns a value indicating whether the collection is read-only.

Item(index)

TreeNode: Returns or sets the TreeNode at the specified index in the collection.

Throws:

• ArgumentException The TreeNode being assigned is also a parent causing a circular reference.

• ArgumentNullException The value is null.

• ArgumentOutOfRangeException The index value is less than 0 or is greater than the number of tree nodes in the collection.

Item(key)

TreeNode: Returns the TreeNode with the specified key from the collection.

Methods

Add(text)

Adds a new tree node with the specified label text to the end of the current TreeNodeCollection.

Parameter	Type	Description
text	String	The label text displayed by the TreeNode.

Returns: TreeNode. A TreeNode that represents the tree node being added to the collection.

Add(key, text)

Creates a new TreeNode with the specified key and text, and adds it to the collection.

Parameter	Type	Description
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.

Returns: TreeNode. The TreeNode that was added to the collection.

Add(key, text, imageIndex)

Creates a TreeNode with the specified key, text, and image, and adds it to the collection.

Parameter	Type	Description
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageIndex	Int32	The index of the image to display in the TreeNode.

Returns: TreeNode. The TreeNode that was added to the collection.

Add(key, text, imageKey)

Creates a TreeNode with the specified key, text, and image, and adds it to the collection.

Parameter	Type	Description
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageKey	String	The image to display in the TreeNode.

Returns: TreeNode. The TreeNode that was added to the collection.

Add(key, text, imageIndex, selectedImageIndex)

Creates a TreeNode with the specified key, text, and images, and adds it to the collection.

Parameter	Type	Description
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageIndex	Int32	The index of the image to display in the TreeNode.
selectedImageIndex	Int32	The index of the image to be displayed in the tree node when it is in a selected state.

Returns: TreeNode. The tree node that was added to the collection.

Add(key, text, imageKey, selectedImageKey)

Creates a TreeNode with the specified key, text, and images, and adds it to the collection.

Parameter	Type	Description
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageKey	String	The key of the image to display in the TreeNode.
selectedImageKey	String	The key of the image to display when the node is in a selected state.

Returns: TreeNode. The TreeNode that was added to the collection.

Add(node)

Adds a previously created TreeNode to the end of the TreeNodeCollection.

Parameter	Type	Description
node	TreeNode	The TreeNode to add to the collection.

Returns: Int32. The zero-based index value of the TreeNode added to the TreeNodeCollection.

Throws:

• ArgumentNullException node is null.

• ArgumentException The node is currently assigned to another TreeView or it is a parent node causing a circular reference.

AddRange(nodes)

Adds an array of previously created TreeNode objects to the collection.

Parameter	Type	Description
nodes	TreeNode[]	An array of TreeNode objects representing the tree nodes to add to the collection.

Throws:

• ArgumentNullException nodes is null or one of the items in the collection is null.

• ArgumentException nodes is the child of another TreeView.

Clear()

Removes all tree nodes from the collection.

Clear(dispose)

Removes and disposes all tree nodes from the collection.

Parameter	Type	Description
dispose	Boolean	Indicates whether to dispose the tree nodes removed from the collection.

Contains(node)

Determines whether the specified TreeNode is a member of the collection.

Parameter	Type	Description
node	TreeNode	The TreeNode to locate in the collection.

Returns: Boolean. true if the TreeNode is a member of the collection; otherwise, false.

ContainsKey(key)

Determines whether the collection contains a TreeNode with the specified key.

Parameter	Type	Description
key	String	The name of the TreeNode to search for.

Returns: Boolean. true to indicate the collection contains a TreeNode with the specified key; otherwise, false.

CopyTo(dest, index)

Copies the entire collection into an existing array at a specified location within the array.

Parameter	Type	Description
dest	Array	The destination array.
index	Int32	The index in the destination array at which storing begins.

Find(key, searchAllChildren)

Finds the TreeNode objects with specified key, optionally searching sub nodes.

Parameter	Type	Description
key	String	The name of the tree node to search for.
searchAllChildren	Boolean	true to search child nodes of tree nodes; otherwise, false.

Returns: TreeNode[]. An array of TreeNode objects whose Name property matches the specified key.

GetEnumerator()

Returns an enumerator that can be used to iterate through the TreeNodeCollection.

Returns: IEnumerator<TreeNode>. An IEnumerator that represents the TreeNodeCollection.

IndexOf(node)

Returns the index of the specified TreeNode in the collection.

Parameter	Type	Description
node	TreeNode	The TreeNode to locate in the collection.

Returns: Int32. The zero-based index of the item found in the tree node collection; otherwise, -1.

IndexOfKey(key)

Returns the index of the first occurrence of a TreeNode with the specified key.

Parameter	Type	Description
key	String	The name of the tree node to search for.

Returns: Int32. The zero-based index of the first occurrence of a tree node with the specified key, if found; otherwise, -1.

Insert(index, node)

Inserts an existing tree node into the tree node collection at the specified location.

Parameter	Type	Description
index	Int32	The indexed location within the collection to insert the TreeNode.
node	TreeNode	The TreeNode to insert into the collection.

Throws:

• ArgumentNullException node is null.

• ArgumentException The node is currently assigned to another TreeView or it is a parent node causing a circular reference.

Insert(index, text)

Creates a TreeNode with the specified text and inserts it at the specified index.

Parameter	Type	Description
index	Int32	The location within the collection to insert the TreeNode.
text	String	The text to display in the TreeNode.

Returns: TreeNode. The TreeNode that was inserted in the collection.

Insert(index, key, text)

Creates a tree node with the specified text and key, and inserts it into the collection.

Parameter	Type	Description
index	Int32	The location within the collection to insert the TreeNode.
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.

Returns: TreeNode. The TreeNode that was inserted in the collection.

Insert(index, key, text, imageIndex)

Creates a TreeNode with the specified key, text, and image, and inserts it into the collection at the specified index.

Parameter	Type	Description
index	Int32	The location within the collection to insert the TreeNode.
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageIndex	Int32	The index of the image to display in the TreeNode.

Returns: TreeNode. The TreeNode that was inserted in the collection.

Insert(index, key, text, imageKey)

Creates a TreeNode with the specified key, text, and image, and inserts it into the collection at the specified index.

Parameter	Type	Description
index	Int32	The location within the collection to insert the TreeNode.
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageKey	String	The key of the image to display in the TreeNode.

Returns: TreeNode. The TreeNode that was inserted in the collection.

Insert(index, key, text, imageIndex, selectedImageIndex)

Creates a TreeNode with the specified key, text, and images, and inserts it into the collection at the specified index.

Parameter	Type	Description
index	Int32	The location within the collection to insert the TreeNode.
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageIndex	Int32	The index of the image to display in the TreeNode.
selectedImageIndex	Int32	The index of the image to display in the TreeNode when it is in a selected state.

Returns: TreeNode. The TreeNode that was inserted in the collection.

Insert(index, key, text, imageKey, selectedImageKey)

Creates a TreeNode with the specified key, text, and images, and inserts it into the collection at the specified index.

Parameter	Type	Description
index	Int32	The location within the collection to insert the TreeNode.
key	String	The name of the TreeNode.
text	String	The text to display in the TreeNode.
imageKey	String	The key of the image to display in the TreeNode.
selectedImageKey	String	The key of the image to display in the TreeNode when it is in a selected state.

Returns: TreeNode. The TreeNode that was inserted in the collection.

Remove(node)

Removes the specified TreeNode from the TreeNodeCollection.

Parameter	Type	Description
node	TreeNode	The TreeNode to remove.

Throws:

• ArgumentNullException node is null.

RemoveAt(index)

Removes a tree node from the tree node collection at a specified index.

Parameter	Type	Description
index	Int32	The index of the TreeNode to remove.

RemoveByKey(key)

Removes the TreeNode with the specified key from the collection.

Parameter	Type	Description
key	String	The name of the tree node to remove from the collection.

Events

CollectionChanged

CollectionChangeEventHandler Fired when the collection changes.