我有 WPF DataGrid,我正在绑定 DataGrid,但如果对 Data 进行任何更改,它将自动刷新,但我对 datagrid 行的选择将取消选择。
问问题
1252 次
1 回答
1
不要使用 aList
来存储数据,而是尝试使用ObservableCollection
. 使用 的优点是,每当您向集合中添加项目时,UI 都会自动更新,因此不需要ObservableCollection
手动刷新。DataGrid
下面我分享了一个示例应用程序,它在DataGrid
.
XAML:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<StackPanel Orientation="Horizontal">
<RadioButton Name="CBAdd" GroupName="AddOrEdit" Content="Add Messages" IsChecked="True"></RadioButton>
<RadioButton Name="CBUpdate" GroupName="AddOrEdit" Content="Update Messages"></RadioButton>
</StackPanel>
<DataGrid Grid.Row="1" Name="DGNew" CanUserAddRows="False">
</DataGrid>
</Grid>
代码背后:
using System;
using System.Windows;
using System.Timers;
using System.Collections.ObjectModel;
using System.Windows.Threading;
using System.ComponentModel;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
Timer _timer = null;
ObservableCollection<CustomMessage> _messages = null;
int count = 0;
public MainWindow()
{
InitializeComponent();
_messages = new ObservableCollection<CustomMessage>();
count++;
_messages.Add(new CustomMessage() { ID = count, Message = "Message" });
_timer = new Timer(1000);
_timer.Elapsed += new ElapsedEventHandler(_timer_Elapsed);
this.DGNew.ItemsSource = _messages;
_timer.Start();
}
void _timer_Elapsed(object sender, ElapsedEventArgs e)
{
try
{
_timer.Stop();
Application.Current.Dispatcher.Invoke(DispatcherPriority.Background, new Action(() =>
{
if (this.CBAdd.IsChecked == true)
{
count++;
_messages.Add(new CustomMessage() { ID = count, Message = "Timer Message " + count });
}
else
{
// Udpate existing Message
Random random = new Random();
CustomMessage message = _messages[random.Next(0, count)];
message.Message = "Updated Time" + DateTime.Now.ToLongTimeString();
}
}));
}
finally
{
_timer.Start();
}
}
}
public class CustomMessage : INotifyPropertyChanged
{
private int _ID;
public int ID
{
get { return _ID; }
set
{
_ID = value;
OnPropertyChanged("ID");
}
}
private string _Message;
public string Message
{
get { return _Message; }
set
{
_Message = value;
OnPropertyChanged("Message");
}
}
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
于 2013-07-24T06:23:13.467 回答