dev的CheckedComboBoxEdit下拉框控件设置成单选框

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已于 2022-08-23 09:12:11 修改

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分类专栏： winform DevExpress 文章标签： winform

于 2022-08-22 15:02:54 首次发布

本文链接：https://blog.youkuaiyun.com/qq_43128070/article/details/126466254

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本文介绍了如何通过修改CheckedComboBoxEdit1的SelectAllItemVisible属性使其不可全选，并实现单选功能，包括设置Popup事件处理程序以确保每次只能选择一项。

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只需修改一个属性，写一个事件:

CheckedComboBoxEdit1.Properties.SelectAllItemVisible = false;//下拉框设置成不可全选

#region CheckedComboBoxEdit设置成单选框
        private void CheckedComboBoxEdit1_Popup(object sender, EventArgs e)
        {
            CheckedListBoxControl checkedListBoxControl = (sender as IPopupControl)?.PopupWindow.Controls.OfType<PopupContainerControl>().First().Controls.OfType<CheckedListBoxControl>().First();

            if (checkedListBoxControl != null)
            {
                checkedListBoxControl.ItemCheck -= checkedListBoxControl_ItemCheck;
                checkedListBoxControl.ItemCheck += checkedListBoxControl_ItemCheck;
            }
        }
        private void checkedListBoxControl_ItemCheck(object sender, DevExpress.XtraEditors.Controls.ItemCheckEventArgs e)
        {
            if (e.State == CheckState.Checked)
            {
                CheckedListBoxControl list = sender as CheckedListBoxControl;
                List<CheckedListBoxItem> items = new List<CheckedListBoxItem>();
                foreach (int index in list.CheckedIndices)
                {
                    if (index == e.Index) continue;
                    items.Add(list.Items[index]);
                }
                foreach (CheckedListBoxItem item in items)
                    item.CheckState = CheckState.Unchecked;
            }
        }
#endregion