C# CheckedListBox 只允许选中一项

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时间:2020-08-09 14:17:16  来源:igfitidea点击:

CheckedListBox allowing only one item to be checked

c#winformscheckedlistbox

提问by Ahmed

In my CheckedListBoxapp I want to allow only a single item to be checked.

在我的CheckedListBox应用程序中,我只想允许检查一个项目。

I have these properties already set

我已经设置了这些属性

checkOnClick = true;
SelectionMode = One;

Any advise will be appreciated

任何建议将不胜感激

采纳答案by Zaki

uncheck all other items in ItemCheck event as below :

取消选中 ItemCheck 事件中的所有其他项目,如下所示:

private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e) {
      for (int ix = 0; ix < checkedListBox1.Items.Count; ++ix)
        if (ix != e.Index) checkedListBox1.SetItemChecked(ix, false);
    }

回答by Nicolas Tyler

the best way to do this is like this:

最好的方法是这样的:

private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
    if (e.NewValue == CheckState.Checked && checkedListBox1.CheckedItems.Count > 0)
    {
        checkedListBox1.ItemCheck -= checkedListBox1_ItemCheck;
        checkedListBox1.SetItemChecked(checkedListBox1.CheckedIndices[0], false);
        checkedListBox1.ItemCheck += checkedListBox1_ItemCheck;
    }
}

no looping is always better.

没有循环总是更好。