PIbd-33_FIrsov_Kirill_KOP/WinFormsApp1/Form1.cs

using MyUserControls;

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            InitialChekedListBox();
            InitialSmartTextBox();
            InitialTree();
        }

        private void InitialChekedListBox()
        {
            
            smartCheckedListBox1.AddItem("Ýëåìåíò 1");
            smartCheckedListBox1.AddItem("Ýëåìåíò 2");
            smartCheckedListBox1.AddItem("Ýëåìåíò 3");

            smartCheckedListBox1.SelectedValue = "Ýëåìåíò 3";
        }

        private void InitialSmartTextBox()
        {

            smartTextBox1.MinLength = 0;
            smartTextBox1.MaxLength = 1000;
            smartTextBox1.InputText = "jjjjj";
        }

        private void InitialTree()
        {
            var obj1 = new SampleClass { Name = "Item1", Category = "Category1", SubCategory = "SubCategory1" };
            var obj2 = new SampleClass { Name = "Item2", Category = "Category1", SubCategory = "SubCategory2" };

            List<string> properties = new List<string>
            {
                "Name",
                "Category",
                "SubCategory"
            };

            hierarchicalTreeView.SetPropertyHierarchy(properties);

            hierarchicalTreeView.AddObject(obj1);
            hierarchicalTreeView.AddObject(obj2);

            hierarchicalTreeView.SelectNode(1, "SubCategory2");

            smartTextBox1.InputText = hierarchicalTreeView.GetSelectedItem<SampleClass>().ToString();
        }
    }
}