MS Treeview control : Prevent duplicate noed in treeview

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Hello , I have a treeview control designed in VS 2010 . I have a root , parent ( i call a group ) and child ( Standalone hyper v or Cluster hyper v) . For the cluster part i only want to display one cluster and another child (the host(s) associated with the cluster) .

But in my code , i am adding the same cluster noed as many time as the host associated .
Exemple

Cluster 1
--------noed1
Cluster 1
---------noed2

I only need to show.

Cluster 1
---------noed1
---------noed2

I manage to not create the second cluster noed if exist but now i can't add the noed2 , i dont know why .

My code is :

SysWeb.TreeNode Clusternoed = Clustergroup;
Clusternoed = new SysWeb.TreeNode(Children);

                                if (output != "found")
                                {
                                    SysWin.MessageBox.Show("No cluster found for" + Children);
                                    group.ChildNodes.Add(Clustergroup);//---------->add cluster is working
                                    Clustergroup.ChildNodes.Add(Clusternoed); //---> add noed is working .
                                }
                                else
                                {

                                    SysWin.MessageBox.Show("Cluster found for :" + Children);
                                    //group.ChildNodes.Add(Clustergroup); dont add cluster but only children
                                    Clustergroup.ChildNodes.Add(Clusternoed); //--> not working 

                                }

If i add the cluster in else condition , it works and also add "noed2" to the cluster . But i dont wan t to have the same cluster name twice . I need to display as show above .. Many many thanks for your help

Posted 18-Sep-14 23:41pm

Seevadassen KARUPPANNAN

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George Jonsson 19-Sep-14 5:54am

What is the error you get?
This code is a bit weird also.
SysWeb.TreeNode Clusternoed = Clustergroup;
Clusternoed = new SysWeb.TreeNode(Children);
You overwrite the value of Clusternoed in the second line which makes the first line useless.

Seevadassen KARUPPANNAN 19-Sep-14 6:04am

i am not getting any error . the output=found is a search if i find the cluster in all nodes , the output variable = found else i dont find the cluster the i need to create the cluster noed . with the line 'Group.ChildNodes.Add(Clustergroup)' and add the child 'Clustergroup.ChildNodes.Add(Clusternoed)'. I again search , If find the same cluster so i dont have to create it but only add the child 'Clustergroup.ChildNodes.Add(Clusternoed)';

I have not copy the whole code . I am filling the treeview with sql commands , so i have to verify for a cluster exist or not ( if yes i only add host belonging to it else i create it and the add all host(s) that belong to it.

Seevadassen KARUPPANNAN 19-Sep-14 5:59am

i am not getting any error . the output=found is a search if i find the cluster in all nodes , the output variable = found else i dont find the cluster the i need to create the cluster noed . with the line 'Group.ChildNodes.Add(Clustergroup)' and add the child 'Clustergroup.ChildNodes.Add(Clusternoed)'. I again search , If find the same cluster so i dont have to create it but only add the child 'Clustergroup.ChildNodes.Add(Clusternoed)';

Seevadassen KARUPPANNAN 19-Sep-14 6:02am

I have not copy the whole code . I am filling the treeview with sql commands , so i have to verify for a cluster exist or not ( if yes i only add host belonging to it else i create it and the add all host(s) that belong to it.

Seevadassen KARUPPANNAN 19-Sep-14 6:06am

Is inserting the child at the cluster(index) a solution ? I get the Cluster1.index and add the child using addat to the existing cluster1 ?

George Jonsson 19-Sep-14 6:17am

What does this mean?
Clustergroup.ChildNodes.Add(Clusternoed); //--> not working
No error code or anything?
What doesn't work?

Seevadassen KARUPPANNAN 19-Sep-14 6:20am

Not working that is , if i make a display i can see the noed2 but when i want to add the noed2 to the cluster is does not work . If i add the cluster and then noed , it works !

BillWoodruff 19-Sep-14 6:35am

What specific error message do you get in the 'else condition ?

You need to make your question clearer: define exactly: Cluster, and Group. Under what circumstances do you create a new Cluster, a new Group.

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George Jonsson · Answer 1 · 2014-09-19T00:38:00

Try something according to this logic.

C#

// The method CheckIfClusterExist is your method and should return null if no cluster was found
TreeNode clusterFound = CheckIfClusterExist("ClusterName");
if (clusterFound == null)
{
    clusterFound = group.ChildNodes.Add(Clustergroup);
}
clusterFound.ChildNodes.Add(Clusternoed);