97 lines
3.1 KiB
C#
97 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace COP
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{
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public partial class UserTreeView : UserControl
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{
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public List<string> Hierarchy;
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public UserTreeView()
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{
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InitializeComponent();
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Hierarchy = new();
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}
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public int SelectedItemIndex
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{
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get
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{
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if (treeView.SelectedNode == null)
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{
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return -1;
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}
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return treeView.SelectedNode.Index;
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}
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}
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public T? GetSelectedObject<T>() where T : class, new()
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{
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// параметризованный
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//проверка есть или нет иерархии
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TreeNode selectedNode = treeView.SelectedNode;
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if (Hierarchy == null)
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{
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throw new Exception("Hierarchy is not set.");
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}
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if (selectedNode?.FirstNode != null)
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{
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throw new Exception("Not a last level node.");
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}
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T currentBranch = new T();
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Hierarchy.Reverse();
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foreach (var property in Hierarchy)
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{
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typeof(T).GetProperty(property).SetValue(currentBranch, Convert.ChangeType(selectedNode.Text, typeof(T).GetProperty(property).PropertyType));
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selectedNode = selectedNode.Parent;
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}
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Hierarchy.Reverse();
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return currentBranch;
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}
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//проверка что выбранный элем последний в ветке
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public void PopulateTree<T>(List<T> items)
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{
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treeView.BeginUpdate();
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treeView.Nodes.Clear();
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if (items == null)
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{
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throw new ArgumentNullException(nameof(items));
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}
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if (Hierarchy == null)
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{
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throw new Exception("Hierarchy is not set.");
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}
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foreach (var item in items)
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{
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TreeNodeCollection treeViewNodes = treeView.Nodes;
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foreach (var elem in Hierarchy)
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{
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bool flag = false;
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for (int i = 0; i < treeViewNodes.Count; i++)
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{
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if (item.GetType().GetProperty(elem).GetValue(item).ToString() == treeViewNodes[i].Text)
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{
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treeViewNodes = treeViewNodes[i].Nodes;
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flag = true;
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break;
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}
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}
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if (!flag)
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{
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var newNode = treeViewNodes.Add(item.GetType().GetProperty(elem).GetValue(item).ToString());
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treeViewNodes = newNode.Nodes;
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}
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}
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}
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treeView.EndUpdate();
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}
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}
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}
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