C# Treeview checking if node exists

Question

I\'m trying to populate a treeview from an XmlDocument. The Root of the tree is set as \'Scripts\' and from the root the next level should be \'Departments\' which is within the

Answer 1

If your XML document has a set structure where 'Departments' will always be indexed at 1;

ie:

index:[0] Scripts
    index:[1] Department
        index:[2] Script
    index:[1] Department2
        index:[2] Script

Then you could encapsulate the following code into a method where 'name' is a string parameter and the return type is boolean.

foreach (TreeNode node in uxTreeView.Nodes[0].Nodes) {
    if (node.Name.ToLower() == name.ToLower()) {
        return true;
    }
}
return false;

The idea is you would call that function each time you encounter a 'Department' node in your Xml, before creating the TreeNode.

Full example:

private bool DepartmentNodeExists(string name) {
    foreach (TreeNode node in uxTreeView.Nodes[0].Nodes) {
        if (node.Name.ToLower() == name.ToLower()) {
            return true;
        }
    }
    return false;
}

Lastly, the easy way:

private bool DepartmentNodeExists(string name) {
    if (uxTreeView.Nodes[0].ContainsKey(name)) {
        return true;
    }
    else {
        return false;
    }
}

These are all just refactored and encapsulated into their own named methods, you of course could just call:

if (uxTreeView.Nodes[0].ContainsKey(name)) {
    // do not create TreeNode
}

...during your parsing of your XML. PS. These examples all assume that you have the first root node in the TreeView already created and added to the TreeView.