根据 Miguel 的回答,我向名为 MyDataElement 的子类元素添加了一个公共 Delete 方法。
public class MyDataElement : Element {
static NSString key = new NSString ("myDataElement");
public MyData MyData;
public MyDataElement (MyData myData) : base (null)
{
MyData = myData;
}
public override UITableViewCell GetCell (UITableView tv)
{
var cell = tv.DequeueReusableCell (key) as MyDataCell;
if (cell == null)
cell = new MyDataCell (MyData, key);
else
cell.UpdateCell (MyData);
return cell;
}
public void Delete() {
Console.WriteLine(String.Format("Deleting record {0}", MyData.Id));
}
}
然后在我的子类 DialogViewController 上,我处理 CommitEditingStyle 方法,将元素转换为 MyDataElement,然后调用 Delete 方法:
public class EntityEditingSource : DialogViewController.Source {
public EntityEditingSource(DialogViewController dvc) : base (dvc) {}
public override bool CanEditRow (UITableView tableView, NSIndexPath indexPath)
{
// Trivial implementation: we let all rows be editable, regardless of section or row
return true;
}
public override UITableViewCellEditingStyle EditingStyleForRow (UITableView tableView, NSIndexPath indexPath)
{
// trivial implementation: show a delete button always
return UITableViewCellEditingStyle.Delete;
}
public override void CommitEditingStyle (UITableView tableView, UITableViewCellEditingStyle editingStyle, NSIndexPath indexPath)
{
// In this method, we need to actually carry out the request
var section = Container.Root [indexPath.Section];
var element = section [indexPath.Row];
//Call the delete method on MyDataElement
(element as MyDataElement).Delete();
section.Remove (element);
}
}