How to make a treeview from a database column filepath

Question

I have a column in a database table which contains the filepath for each file in the table. How can I make a treeview in c# which will mimic the filepath column in my database.

Here is what a sample filepath column looks like in the column:

jsmith/project1/hello.cs
jsmith/project1/what.cs
jwilliams/project2/hello.cs

Answer 1

I´ve made a little example. I´ve test it and it works fine.

Note that I´ve made a class MyDataBase to simulate your database:

public void CreateTreeView()
        {

            TreeView myTreeview = new TreeView();
            myTreeview.Dock = DockStyle.Fill;
            this.Controls.Add(myTreeview);

            foreach (string field in MyDataBase.FieldsInMyColumn())
            {
                string[] elements = field.Split('/');

                TreeNode parentNode = null;

                for(int i = 0; i < elements.Length - 1; ++i)
                {                                        
                    if (parentNode == null)
                    {
                        bool exits = false;
                        foreach (TreeNode node in myTreeview.Nodes)
                        {
                            if (node.Text == elements[i].ToString())
                            {
                                exits = true;
                                parentNode = node;   
                            }
                        }
                        if (!exits)
                        {
                            TreeNode childNode = new TreeNode(elements[i].ToString());
                            myTreeview.Nodes.Add(childNode);
                            parentNode = childNode;
                        }                        
                    }
                    else
                    {
                        bool exits = false;
                        foreach (TreeNode node in parentNode.Nodes)
                        {
                            if (node.Text == elements[i].ToString())
                            {
                                exits = true;
                                parentNode = node;
                            }
                        }
                        if (!exits)
                        {
                            TreeNode childNode = new TreeNode(elements[i].ToString());
                            parentNode.Nodes.Add(childNode);
                            parentNode = childNode;
                        }



                    }

                }
                if (parentNode != null)
                {
                    parentNode.Nodes.Add(elements[elements.Length - 1].ToString());
                }


            }         
        }

EDIT

Here I paste my auxiliar code, that you don´t need, but it will help you to understand my code, or to copy/paste and try it by yourself.

 public static class MyDataBase
    {
        private static List<string> fields = new List<string>();

        public static void AddField(string field)
        {
            fields.Add(field);
        }

        public static IList<string> FieldsInMyColumn()
        {
            return fields;
        }
    }

Constructor in form1

public Form1()
{

    InitializeComponent();

    MyDataBase.AddField("jsmith/project1/hello.cs");
    MyDataBase.AddField("jsmith/project1/what.cs");
    MyDataBase.AddField("jsmith/project2/hello.cs");

    CreateTreeView();
}