Проверка на DateOnly в ExcelColumnHeaders

теперь обрабатывается после срабатывания

WinFormSolution/Components/ComponentExcelTableWithColumnHeader.cs

@@ -56,7 +56,12 @@ namespace Components
                     var property = data.GetType().GetProperty(headersConfig[rowIndex].propertyName);
                     if (property != null)
                     {
-                        worksheet.Cells[rowIndex + 2, colIndex + 3].Value = property.GetValue(data);
+                        if(property.PropertyType == typeof(DateOnly))
+                        {
+                            worksheet.Cells[rowIndex + 2, colIndex + 3].Value = property.GetValue(data).ToString();
+                        }
+                        else
+                            worksheet.Cells[rowIndex + 2, colIndex + 3].Value = property.GetValue(data);
                     }
                 }
             }

WinFormSolution/Components/Components.csproj

@@ -7,7 +7,7 @@
 		<ImplicitUsings>enable</ImplicitUsings>
 		<GeneratePackageOnBuild>True</GeneratePackageOnBuild>
 		<Authors>ns.potapov</Authors>
-		<VersionPrefix>1.0.2</VersionPrefix>
+		<VersionPrefix>1.1.0</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.Designer.cs

@@ -36,22 +36,20 @@
             checkedListBox.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
             checkedListBox.CheckOnClick = true;
             checkedListBox.FormattingEnabled = true;
-            checkedListBox.Location = new Point(9, 8);
+            checkedListBox.Location = new Point(8, 6);
-            checkedListBox.Margin = new Padding(3, 4, 3, 4);
             checkedListBox.Name = "checkedListBox";
-            checkedListBox.Size = new Size(509, 400);
+            checkedListBox.Size = new Size(446, 292);
             checkedListBox.TabIndex = 0;
             checkedListBox.ItemCheck += checkedListBox_ItemCheck;
             // 
             // UserControlCheckedList
             // 
-            AutoScaleDimensions = new SizeF(8F, 20F);
+            AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             BackColor = Color.Firebrick;
             Controls.Add(checkedListBox);
-            Margin = new Padding(3, 4, 3, 4);
             Name = "UserControlCheckedList";
-            Size = new Size(527, 415);
+            Size = new Size(461, 311);
             ResumeLayout(false);
         }
 

WinFormSolution/Components/UserControlCheckedList.cs

@@ -1,8 +1,25 @@
-namespace Components
+using Components.Exceptions;
+using System.Windows.Forms;
+
+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 +45,28 @@
                 }
             }
         }
+        public List<string> CheckedItemss
+        {
+            get
+            {
+                List<string> list = new List<string>();
+                foreach (var item in checkedListBox.CheckedItems)
+                {
+                    list.Add(item.ToString());
+                }
+                return list;
+            }
+            set
+            {
+                foreach (var item in value)
+                {
+                    if (checkedListBox.Items.Contains(item))
+                    {
+                        checkedListBox.SetItemCheckState(checkedListBox.Items.IndexOf(item), CheckState.Checked);
+                    }
+                }
+            }
+        }
         public UserControlCheckedList()
         {
             InitializeComponent();
@@ -46,14 +85,24 @@
         }
         private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e)
         {
-            for (int i = 0; i < checkedListBox.Items.Count; i++)
+            this.BeginInvoke((MethodInvoker)(
+            () =>
             {
-                if (i != e.Index)
+                if (checkedListBox.CheckedItems.Count > MaxCheckedItemsCount)
                 {
-                    checkedListBox.SetItemChecked(i, false);
+                    if (typeOfMaxChecked == Types.Exception)
+                    {
+                        MessageBox.Show("Превышено максимальное число выбранных элементов");
+                        checkedListBox.SetItemChecked(e.Index, false);
+                    }
+                    else if (typeOfMaxChecked == Types.DeleteFirst)
+                    {
+                        checkedListBox.SetItemCheckState(checkedListBox.Items.IndexOf(CheckedItem), CheckState.Unchecked);
+                    }
+
                 }
-            }
+                _onCheckedItemChangedEvent?.Invoke(sender, e);
-            _onCheckedItemChangedEvent?.Invoke(sender, e);
+            }));
         }
     }
 }

WinFormSolution/WinFormsApp/FormVisual.cs

@@ -18,8 +18,8 @@ namespace WinFormsApp
             list.Add("<22><><EFBFBD><EFBFBD><EFBFBD>");
             list.Add("C#");
             userControlCheckedList.SetCheckedListBoxValues(list);
-
+            userControlCheckedList.MaxCheckedItemsCount = 3;
-            userControlCheckedList.CheckedItem = list[3];
+            userControlCheckedList.ChangeTypeOfMaxChecked(Components.Types.DeleteFirst);
         }
 
         private void buttonClearList_Click(object sender, EventArgs e)