asked on

Iterating through a treeView

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

axnst2

ASKER

I am working in C#

axnst2

ASKER

.NET 2005

ASKER CERTIFIED SOLUTION

Mike Tomlinson

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

axnst2

ASKER

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!

axnst2

ASKER

Thanks for your help though Idle!