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Iterating through a treeView

Posted on 2006-06-16
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Last Modified: 2012-05-05
Hi Experts,

      Maybe it's just me, but I think that working with the TreeView Control is 10 times harder than it has to be.  Here's what I need to do:

  I need to dynamically populate a treeView.  I DON'T WANT TO USE ANY LINKED LISTS OR ARRAY LISTS OR ANY OF THAT.  My app is way too complicated to make the use of lists practical.  I basically need to check if a certain grand child nood exists, if it does I need to update it, if not I need to create it.  Please keep in mind that I don't know if there's anything in the TreeView yet at all.  It could be completely empty in which case I need to make the Parent, Child, and, GrandChild nodes for that particular record.  If it does exist, then I need to update the grandchild's name.
  Also, How can I put an icon in front of a certaing grandchild node.  Not all of them, just certain ones.

Thanks,
axnst2
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Question by:axnst2
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Author Comment

by:axnst2
ID: 16919645
I am working in C#
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Author Comment

by:axnst2
ID: 16919647
.NET 2005
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LVL 85

Accepted Solution

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Mike Tomlinson earned 500 total points
ID: 16919943
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Author Comment

by:axnst2
ID: 16920538
This is what I endedd up doing:

void FindInTreeView()
        {
            bool equipAlreadyExists = false;
            int locatedEquipIndex = 0;

            if (treeView1.Nodes[0].Nodes.Count > 0)
            {// If TreeView isn't completely empty

                int equipCounter=0;

                // Check to see if Equipment is already in the list
                foreach (TreeNode tn in treeView1.Nodes[0].Nodes)
                {
                    if (tn.Text == tempEquip.IPAddress)
                    {// It exists
                        equipAlreadyExists = true;
                        locatedEquipIndex = equipCounter;
                    }
                    equipCounter++;
                }

                // If it exists, update it
                if (equipAlreadyExists)
                {
                    treeView1.BeginUpdate();
                    treeView1.Nodes[0].Nodes[locatedEquipIndex].Nodes[0].Text = "Equipment Type: " + tempEquip.EquipType;
                    treeView1.Nodes[0].Nodes[locatedEquipIndex].Nodes[1].Text = "Comm. Status: " + tempEquip.CommStatus;
                    treeView1.Nodes[0].Nodes[locatedEquipIndex].Nodes[2].Text = "Comm. Time: " + tempEquip.LastCommTime + " ms";
                    treeView1.EndUpdate();
                }
                else // If equipment doesn't exist, add it
                {
                    treeView1.BeginUpdate();
                    treeView1.Nodes[0].Nodes.Add(tempEquip.IPAddress);
                    treeView1.Nodes[0].Nodes[equipCounter].Nodes.Add("Equipment Type: " + tempEquip.EquipType);
                    treeView1.Nodes[0].Nodes[equipCounter].Nodes.Add("Comm. Status: " + tempEquip.CommStatus);
                    treeView1.Nodes[0].Nodes[equipCounter].Nodes.Add("Comm. Time: " + tempEquip.LastCommTime + " ms");
                    treeView1.EndUpdate();
                }

            }
            else// If TreeView is empty
            {

                // Add new equipment
                treeView1.BeginUpdate();
                treeView1.Nodes[0].Nodes.Add(tempEquip.IPAddress);
                treeView1.Nodes[0].FirstNode.Nodes.Add("Equipment Type: " + tempEquip.EquipType);
                treeView1.Nodes[0].FirstNode.Nodes.Add("Comm. Status: " + tempEquip.CommStatus);
                treeView1.Nodes[0].FirstNode.Nodes.Add("Comm. Time: " + tempEquip.LastCommTime + " ms");
                treeView1.EndUpdate();
            }
            treeView1.ExpandAll();
        }

This works well for me.  TriewWiev still stinks though!
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Author Comment

by:axnst2
ID: 16920562
Thanks for your help though Idle!
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