从 List<> C# 动态添加新项目到复选框列表
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Add new items to checkboxlist dynamically from a List<> C#
提问by Paradigm
I don't want to add items from the collection HARD-CODED style, I want to populate them from a List<> when a button is pressed.
我不想从集合 HARD-CODED 样式中添加项目，我想在按下按钮时从 List<> 填充它们。
First i took data from the list like this:
首先，我从列表中获取数据，如下所示：
private List<User> _users = new List<User>()
foreach (User user in _users) {
int index = checkedListBoxDepts.Items.Add(user.UserName);
upd.checkedListBoxDepts.Items[index] = user;
}
FOR the retrieval of checked items: (I put them in a List of type string):
用于检索已检查的项目：（我将它们放在字符串类型的列表中）：
List<string> Names = new List<string>();
foreach (string s in checkedListBoxDepts.CheckedItems) {
Names.Add(s);
}
回答by yclkvnc
You're getting error because of this line:
由于这一行，您收到错误：
upd.checkedListBoxDepts.Items[index] = user;
You're assigning user object to the checkBoxList's items, then trying to retrieve them as strings
您将用户对象分配给 checkBoxList 的项目，然后尝试将它们作为字符串检索
This is enough to populate:
这足以填充：
private List<User> _users = new List<User>()
foreach (User user in _users) {
checkedListBoxDepts.Items.Add(user.UserName);
}
You can retrieve checked items as strings afterwards
之后您可以将选中的项目作为字符串检索
