扩展 IEnumerable 以返回 BindingList
在上一个关于 Stack Overflow 的问题中，我遇到了返回问题对 DataGridView 的 EF 查询。当然，我会遇到一个问题。然而，我添加了一个扩展方法，但它仍然让我感到困惑，因为它不起作用。看起来应该是这样，但由于某种原因并非如此。
public static class BindingListEntityExtension
{
public static BindingList<T> ToBindingList<T>(this IEnumerable<T> entities)
{
BindingList<T> rtn = new BindingList<T>();
foreach (T obj in entities)
{
rtn.Add(obj);
}
return rtn;
}
}
有什么想法吗？我的实现是这样的：
MyEntities context = new MyEntities();
tempDataGridView.DataSource = context.Employees.ToBindingList();
In a previous question on Stack Overflow, I had run into an issue with returning an EF query to the DataGridView. Of course I'd run into an issue. However, I added an extension method that still has me baffled since it isn't working. It seems like it should, but for some reason it's not.
public static class BindingListEntityExtension
{
public static BindingList<T> ToBindingList<T>(this IEnumerable<T> entities)
{
BindingList<T> rtn = new BindingList<T>();
foreach (T obj in entities)
{
rtn.Add(obj);
}
return rtn;
}
}
Any ideas what's going on? My implementation is like so:
MyEntities context = new MyEntities();
tempDataGridView.DataSource = context.Employees.ToBindingList();
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知道了。正如 Ecyrb 在上一篇文章中所建议的，BindingList 不会排序。我确实使用了建议的网站/来对我的列表进行排序。谢谢你们！我的扩展现在可以工作了。
Got it. As Ecyrb had suggested in a previous post, the BindingList does not sort. I did use the suggested site/ to get my list to sort. Thanks guys! My extension does work now.