Check node exist in treeview

[SachinC]

Hello,

i am having a treeview. and adding the nodes manually.

For Each ct In ChecklistTemplate

                newChecklistTypeNode = New RadTreeNode(ct.ChecklistTypeName, False)
                newChecklistTypeNode.Tag = ct.CheckistTypeID
                newChecklistTypeNode.LoadedOnDemand = True

                If (Not tvChecklists.Nodes.Contains(newChecklistTypeNode)) Then
                    tvChecklists.Nodes.Add(newChecklistTypeNode)
                End If
Next

i am checking whether the node is already present in the treeview.
suppose following nodes are already added in treeview
1. abc
2. xyz
3. pqr

if i now add xyz node in treeview the condition tvChecklists.Nodes.Contains(newChecklistTypeNode) returns FALSE.

Please suggest.

Thanks
Sachin

[SachinC]

Found the solution
Change the code bit

Dim newChecklistTypeNode As RadTreeNode = Nothing
            For Each ct In ChecklistTemplate

                newChecklistTypeNode = New RadTreeNode(ct.ChecklistTypeName, False)
                newChecklistTypeNode.Tag = ct.CheckistTypeID
                newChecklistTypeNode.LoadedOnDemand = True

                If (tvChecklists.Nodes.Item(ct.ChecklistTypeName) Is Nothing) Then
                    tvChecklists.Nodes.Add(newChecklistTypeNode)
                End If
Next

Thanks!
:)

[Emanuel Varga]

Hello Sachin,

This should work:

//treeView.Nodes.Find(string key, bool searchAllChildren)
treeView.Nodes.Find(key, true)

But I'm not 100%, usually, with trees, you have to parse them in order to find the node, something like this:

private bool NodeExists(RadTreeNodeCollection levelNodes, string key)
{
    var exists = false;
    foreach (RadTreeNode node in levelNodes)
    {
        if (node.Text == key)
        {
            exists = true;
            break;
        }

        exists = NodeExists(node.Nodes, key);
    }

    return exists;
}

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga

[Richard Slade]

Hi, 

I think you're right about having to parse them. The Telerik response to this question can be found in this code library area. 
Anyway, as far as I'm aware, a Find is usually doing the same thing under the hood. 
All the best
Richard

[Emanuel Varga]

If it was working... just tried it, returns 0 elements all the time...

So either the method i suggested, or an extension method if it is needed in more than one class (to avoid duplicate code).

Best Regards,
Emanuel Varga

[Stefan]

Hello guys, 

Currently, there are two ways to find a node. The first is the one that Richard has pointed out and the other one is described in our product documentation.

As to the Find method in RadTreeView that always returns 0 elements, this is a known issue that we are going to address in a future release. 

Should you guys need any assistance, do not hesitate to contact me.
 
Sincerely yours,
Stefan
the Telerik team

[Mark de Torres]

Hi Stefan,

The link is not working. Please advise


Richard Slade,

Your link is not working either. Please advise

[Princy]

Hi,

Take a look into this documentation for getting information about searching for a single node by its text.

Hope this helps.

Regards,
Princy.

[Stefan]

Hi guys,

@Mark - please refer to the article Princy mentioned.

@Princy - thank you for helping our the community. I am updating your Telerik points for the efforts.
 
Regards,
Stefan
the Telerik team

[Mark de Torres]

Hi Princy, Stefan

Thank you

[David]

Hi Emanuel,

Thank you

[Mark de Torres]

public EntityCollection<MusicEntity> GetMusicData()
{

    EntityCollection<MusicEntity> collection = GetMusicData();

   

    treMusic.Nodes.Clear();

    ArrayList ptnodes = new ArrayList();


    RadTreeNode nodeWorkplane = new RadTreeNode(p.PWork);
    RadTreeNode nodeUser = new RadTreeNode(p.UserProject.Items[0].UserName);

    RadTreeNode musicgroupnode = new RadTreeNode(p.MusicSubGroup.MusicGroup.Name, String.Empty);
    RadTreeNode musicsubgroupnode = new RadTreeNode(p.MusicSSubGroup.Name, String.Empty);
    RadTreeNode musicnode = new RadTreeNode(p.MusicTitle);
    musicsubgroupnode.Nodes.Add(musicnode);
    musicgroupnode.Nodes.Add(musicsubgroupnode);


    nodeUser.Nodes.Add(musicgroupnode);
    nodeUser.Nodes.Add(nodeWorkplane);


    pgnodes.Add(nodeUser);

    foreach (RadTreeNode pg in ptnodes) 
    {
        treMusic.Nodes.Add(pg);

    }

}

currently nodeUser the same user more than one.How i should prevent to add the same user node. please advise.

[Stefan]

Hi David,

RadTreeView has a Nodes collection where the root nodes are placed and additionally each RadTreeNode also has Nodes collection for its child nodes, so you will need a recursive function to iterate the nodes. Here you can find a example: http://www.telerik.com/community/code-library/winforms/general/get-a-flattened-list-of-all-radmenuitems-in.aspx.

I hope this helps.

All the best,
Stefan
the Telerik team

[Azhar]

Ok