在运行时向 DataGrid 添加新行 (WPF)
我有一个 DataGrid 并在加载窗口时填充它,如下所示:
private void Window_Loaded(object sender, RoutedEventArgs e) {
var list = DbService.GetStuffsFull();
dataGrid.ItemsSource = list;
}
当我尝试通过此代码在运行时添加新行时:
Stuff item = new Stuff();
dataGrid.Items.Add(item);
我收到此错误:
操作无效,同时 ItemsSource 正在使用中。访问和 修改元素 相反,ItemsControl.ItemsSource。
如何在运行时添加新行?
I have a DataGrid and fill it when window loaded, like this:
private void Window_Loaded(object sender, RoutedEventArgs e) {
var list = DbService.GetStuffsFull();
dataGrid.ItemsSource = list;
}
and when i try to add a new row at run-time by this code:
Stuff item = new Stuff();
dataGrid.Items.Add(item);
I get this error:
Operation is not valid while
ItemsSource is in use. Access and
modify elements with
ItemsControl.ItemsSource instead.
how can I add a new row at runtime?
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如果您将
Items
集合中的项目提供为ItemsSource
,则无法修改该集合中的项目。您应该将项目添加到您的list
(已实现INotifyCollectionChanged
),或者您应该首先通过Add
方法填充Items
属性 ?错误描述很清楚,不是吗
You cannot modify items in
Items
collection if you provided it asItemsSource
. You should either add item to yourlist
(withINotifyCollectionChanged
implemented or you should initially populatedItems
property viaAdd
method.The error description is pretty clear, isn't it?
尝试做这样的事情:
var row = dataGrid.NewRow();
try doing something like this:
var row = dataGrid.NewRow();