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Добавил выброс исключения для CheckedListBox

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Никита Потапов 2024-11-28 00:02:40 +04:00
parent c853d7790c
commit 48fc1a8443
1 changed files with 6 additions and 15 deletions
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21
WinFormSolution/Components/UserControlCheckedList.cs
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@ -1,8 +1,9 @@
namespace Components using Components.Exceptions;
namespace Components
{ {
public partial class UserControlCheckedList : UserControl public partial class UserControlCheckedList : UserControl
{ {
private List<int> _lastCheckedIndexes = new List<int>();
public int MaxCheckedItemsCount { get; set; } = 1; public int MaxCheckedItemsCount { get; set; } = 1;
private EventHandler _onCheckedItemChangedEvent; private EventHandler _onCheckedItemChangedEvent;
public event EventHandler CheckedItemChanged public event EventHandler CheckedItemChanged
@ -45,24 +46,14 @@
public void ClearCheckedListBoxValues() public void ClearCheckedListBoxValues()
{ {
checkedListBox.Items.Clear(); checkedListBox.Items.Clear();
_lastCheckedIndexes.Clear();
} }
private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e) private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e)
{ {
if (e.NewValue == CheckState.Checked) if (checkedListBox.CheckedItems.Count > MaxCheckedItemsCount)
{ {
_lastCheckedIndexes.Add(e.Index); checkedListBox.SetItemChecked(e.Index, false);
throw new MaxCheckedItemsCountExceedException("Превышено максимальное число выбранных элементов");
while (_lastCheckedIndexes.Count > MaxCheckedItemsCount)
{
checkedListBox.SetItemCheckState(_lastCheckedIndexes[0], CheckState.Unchecked);
} }
}
else if (e.NewValue == CheckState.Unchecked)
{
_lastCheckedIndexes.Remove(e.Index);
}
_onCheckedItemChangedEvent?.Invoke(sender, e); _onCheckedItemChangedEvent?.Invoke(sender, e);
} }
} }