过滤后编辑 wpf datagrid 行
我有一个 WPF C# 数据网格，我可以使用 SqlDataAdapter 对其进行过滤，并使用 ItemsSource 属性显示它。
我还可以在过滤之前更新/删除行，但不能在过滤之后更新/删除行。
diamedbEntities objContext;
Sender objSendToEdit;
private void Window_Loaded(object sender, RoutedEventArgs e)
{
objContext = new diamedbEntities();
dgEmp.ItemsSource = objContext.Senders;
}
private void dgEmp_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
objSendToEdit = dgEmp.SelectedItem as Sender;
}
private void btnDelete_Click(object sender, RoutedEventArgs e)
{
if (objSendToEdit == null)
{
MessageBox.Show("Cannot delete the blank Entry");
}
else
{
objContext.DeleteObject(objSendToEdit);
objContext.SaveChanges();
MessageBox.Show("Record Deleted..");
}
}
过滤后objSendToEdit为null。 我该如何解决这个问题？
I have a WPF C# datagrid which I can filter through with an SqlDataAdapter and display it with the ItemsSource property.
I can also update/delete rows before filtering but not after.
diamedbEntities objContext;
Sender objSendToEdit;
private void Window_Loaded(object sender, RoutedEventArgs e)
{
objContext = new diamedbEntities();
dgEmp.ItemsSource = objContext.Senders;
}
private void dgEmp_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
objSendToEdit = dgEmp.SelectedItem as Sender;
}
private void btnDelete_Click(object sender, RoutedEventArgs e)
{
if (objSendToEdit == null)
{
MessageBox.Show("Cannot delete the blank Entry");
}
else
{
objContext.DeleteObject(objSendToEdit);
objContext.SaveChanges();
MessageBox.Show("Record Deleted..");
}
}
After filtering objSendToEdit is null.
How can I solve this?
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http://msdn.microsoft.com/en-我们/库/cscsdfbt(v=VS.100).aspx
您想用 objSendToEdit = dgEmp.SelectedItem as Sender; 做什么？
http://msdn.microsoft.com/en-us/library/cscsdfbt(v=VS.100).aspx
What are you trying to do with
objSendToEdit = dgEmp.SelectedItem as Sender;?这是因为过滤器必须清除选择，从而使 objSendToEdit 为空。
您应该在过滤后立即将
objSendToEdit重新选择回数据网格。让我知道这是否有帮助。
This is because filter must be clearing the selection thus making
objSendToEditnull.You should re-select the
objSendToEditback onto the data grid immediately after filtering.Let me know if this helps.