C# 如何刷新列表框的项目？
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How refresh items of a ListBox?
提问by TheScholar
Possible Duplicate:
C# Force ListBox to update elements
可能的重复：
C# 强制 ListBox 更新元素
Let's consider this small piece of code:
让我们考虑一下这段代码：
listbox.DataSource = base_items;
listbox.DisplayMember = "Name";
// ... a bit later in the program
base_items.Add( new Base_Item("Unnamed") );
From this point, how do I do to make the listbox update its items? The only way for me to see the update is to close the window and reload it again.
从这一点来看，我该如何让列表框更新其项目？我看到更新的唯一方法是关闭窗口并重新加载它。
采纳答案by Gregor Primar
Just remove and add databinding again. You can create method that can be used on first load and when new item was added:
只需删除并再次添加数据绑定。您可以创建可在首次加载和添加新项目时使用的方法：
void BindData()
{
listBox.DataSource = null;
listBox.DataSource = base_items;
listbox.DisplayMember = "Name";
}
So here is the code for adding new item and refreshing listbox:
所以这是添加新项目和刷新列表框的代码：
base_items.Add(new Base_Item("Unnamed"));
BindData();
回答by Khan
As mentioned in Marc G's answer.
正如 Marc G 的回答中提到的。
C# Force ListBox to update elements
If you know that the list needs refreshing, simple update the DisplayMemberof the listbox.
如果您知道列表需要刷新，只需更新DisplayMember列表框。
listbox.DisplayMember = "";
listbox.DisplayMember = "Name";
