Telerik RadTreeView阻力
当我在Telerik RadTreeView阻力,telerik,radtreeview,Telerik,Radtreeview,当我在ChildWindow中使用RadTreeView时,即使我将IsDragDropEnabled属性设置为“True”,我也无法拖动项目。但是当我在UserControl中使用RadTreeView时,它可以拖动 问题是什么?我如何解决它?您必须触发事件 承包商 this.treeView1.AddHandler(RadDragAndDropManager.DropQueryEvent, new EventHandler<DragDropQueryEventArgs>(OnDr
ChildWindow
中使用RadTreeView
时,即使我将IsDragDropEnabled
属性设置为“True”,我也无法拖动项目。但是当我在UserControl
中使用RadTreeView
时,它可以拖动
问题是什么?我如何解决它?您必须触发事件
承包商
this.treeView1.AddHandler(RadDragAndDropManager.DropQueryEvent, new EventHandler<DragDropQueryEventArgs>(OnDropQuery), true);
this.treeView1.AddHandler(RadDragAndDropManager.DropQueryEvent,新事件处理程序(OnDropQuery),true);
然后
private void OnDropQuery(对象发送方,DragDropQueryEventArgs e)
{
RadTreeViewItem destinationItem=e.Options.Destination作为RadTreeViewItem;
对象源=this.GetItemFromPayload(e.Options.Payload);
对象目标=destinationItem!=null?destinationItem.Item:null;
DropPosition position=destinationItem!=null?destinationItem.DropPosition:DropPosition.Inside;
if(源!=null&&target!=null)
{
Section sourceSection=源作为节;
区段targetSection=作为区段的目标;
问题来源问题=问题来源;
问题targetQuestion=目标为问题;
if(sourceQuestion!=null)
{
尝试
{
if(sourceQuestion!=null&&targetQuestion!=null&&object.ReferenceEquals(sourceQuestion,targetQuestion))
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e、 QueryResult=false;
回来
}
if(targetQuestion!=null&&position==DropPosition.Inside)
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e、 QueryResult=false;
回来
}
if(position!=DropPosition.Inside&&targetQuestion==null)
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e、 QueryResult=false;
回来
}
}
捕获(例外情况除外)
{
}
}
}
其他的
{
e、 QueryResult=false;
回来
}
e、 QueryResult=true;
}
就是它。您正在使用哪个RadTreeView?ASP.NET、WPF、Silverlight还是WinForms?
private void OnDropQuery(object sender, DragDropQueryEventArgs e)
{
RadTreeViewItem destinationItem = e.Options.Destination as RadTreeViewItem;
object source = this.GetItemFromPayload<object>(e.Options.Payload);
object target = destinationItem != null ? destinationItem.Item : null;
DropPosition position = destinationItem != null ? destinationItem.DropPosition : DropPosition.Inside;
if (source != null && target != null)
{
Section sourceSection = source as Section;
Section targetSection = target as Section;
Question sourceQuestion = source as Question;
Question targetQuestion = target as Question;
if (sourceQuestion != null)
{
try
{
if (sourceQuestion != null && targetQuestion != null && object.ReferenceEquals(sourceQuestion, targetQuestion))
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e.QueryResult = false;
return;
}
if (targetQuestion != null && position == DropPosition.Inside)
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e.QueryResult = false;
return;
}
if (position != DropPosition.Inside && targetQuestion == null)
{
sourceSection.Questions.Remove(sourceQuestion);
targetSection.Questions.Add(sourceQuestion);
e.QueryResult = false;
return;
}
}
catch (Exception ex)
{
}
}
}
else
{
e.QueryResult = false;
return;
}
e.QueryResult = true;
}