fix

Добавил возможность указать максимальное количество чекнутых Item;
При достижении макс. количества последний чекнутый становится не чекнутым;

WinFormSolution/Components/Components.csproj

@@ -7,7 +7,7 @@
 		<ImplicitUsings>enable</ImplicitUsings>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>
 		<Authors>ns.potapov</Authors>
-		<VersionPrefix>1.0.2</VersionPrefix>
+		<VersionPrefix>1.0.5</VersionPrefix>
 		<Version>$(VersionPrefix)</Version>
 	</PropertyGroup>
 

WinFormSolution/Components/Exceptions/MaxCheckedItemsCountExceedException.cs

@@ -0,0 +1,13 @@
+namespace Components.Exceptions
+{
+    internal class MaxCheckedItemsCountExceedException : Exception
+    {
+        public MaxCheckedItemsCountExceedException()
+        {
+        }
+
+        public MaxCheckedItemsCountExceedException(string? message) : base(message)
+        {
+        }
+    }
+}

WinFormSolution/Components/UserControlCheckedList.cs

@@ -1,8 +1,24 @@
-namespace Components
+using Components.Exceptions;
+
+namespace Components
 {
+    public enum Types : int
+    {
+        Exception = 0,
+        DeleteFirst = 1,
+
+    }
+
+
     public partial class UserControlCheckedList : UserControl
     {
+        public int MaxCheckedItemsCount { get; set; } = 1;
+        private Types typeOfMaxChecked = Types.DeleteFirst;
         private EventHandler _onCheckedItemChangedEvent;
+        public void ChangeTypeOfMaxChecked(Types type)
+        {
+            typeOfMaxChecked = type;
+        }
         public event EventHandler CheckedItemChanged
         {
             add
@@ -28,6 +44,25 @@
                 }
             }
         }
+        public List<string> CheckedItems
+        {
+            get
+            {
+                List<string> list = new List<string>();
+                foreach(var item in checkedListBox.CheckedItems )
+                {
+                    list.Add(item.ToString());
+                }    
+                return list;
+            }
+            set
+            {
+                if (checkedListBox.Items.Contains(value))
+                {
+                    checkedListBox.SetItemCheckState(checkedListBox.Items.IndexOf(value), CheckState.Checked);
+                }
+            }
+        }
         public UserControlCheckedList()
         {
             InitializeComponent();
@@ -46,12 +81,18 @@
         }
         private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e)
         {
-            for (int i = 0; i < checkedListBox.Items.Count; i++)
+            if (checkedListBox.CheckedItems.Count > MaxCheckedItemsCount)
             {
-                if (i != e.Index)
+                if (typeOfMaxChecked == Types.Exception)
                 {
-                    checkedListBox.SetItemChecked(i, false);
+                    checkedListBox.SetItemChecked(e.Index, false);
+                    throw new MaxCheckedItemsCountExceedException("Превышено максимальное число выбранных элементов");
                 }
+                else if (typeOfMaxChecked == Types.DeleteFirst)
+                {
+                    checkedListBox.SetItemChecked(0, false);
+                }
+                
             }
             _onCheckedItemChangedEvent?.Invoke(sender, e);
         }