StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POAdding items to List<> of object which already contain data, add duplicate item in the List
primarykey
Id
14337252
data
AcceptedAnswerId
14337327
AnswerCount
1
ClosedDate
CommentCount
4
CommunityOwnedDate
CreationDate
2013-01-15T12:00:50.260
FavoriteCount
0
LastActivityDate
2013-01-15T12:05:03.160
LastEditDate
LastEditorUserId
0
OwnerUserId
1302596
ParentId
0
PostTypeId
1
Score
0
ViewCount
716
LastEditorDisplayName
text
Body
<p>I am developing a Windows phone app for which I want to get a list of first 15 object from my web service plus an extra item to represent the "Load next 15 items button" and bind it to a listbox. On selection of the last element or index(buttton), I want to remove the last item(button) from the list and call the service again to get the next 15 items plus the button item which will again add up to the current list without clearing the list. And the same process goes on as we select the last item from the listbox. My problem is I am able to get it correctly for the first round. In the second round, the next 15 element is added to the list twice. I don't know what is the real problem. I am not getting any error or exception also.</p> <p>Below is what I have done so far :</p> <pre><code>private void ListBox1_SelectionChanged(object sender, SelectionChangedEventArgs e) { int LastIndex=app.imgItem.Count - 1; if (ListBox1.SelectedIndex == LastIndex) { app.imgItem.Remove(app.imgItem[app.imgItem.Count-1]); proxy.SelectNextItemsCompleted += new EventHandler<ServiceReference1.SelectNextItemsCompletedEventArgs>(proxy_SelectNextItemsCompleted); int id = app.imgItem.Last().Id; proxy.SelectNextItemsAsync(categoryID, id); } } void proxy_SelectNextItemsCompleted(object sender, ServiceReference1.SelectNextItemsCompletedEventArgs e) { if (e.Error != null) { MessageBox.Show("Cannot load data."); return; } else { foreach (var item in e.Result) { ImgData idata = new ImgData(); idata.CategoryID = item.CategoryID; idata.ImageID = item.ImageID; idata.ImageTitle = item.ImageTitle; idata.Thumbnail = item.Thumbnail; app.imgItem.Add(idata); } } ImageData btnData = new ImageData(); btnData.CategoryID = 0; btnData.ImageID = 0; btnData.ImageTitle = ""; btnData.Thumbnail = "Images/loadButton.jpg"; app.imgItem.Add(btnData); ListBox1.ItemsSource = app.imgItem; } </code></pre>
Tags
<c#><wcf><windows-phone-7>
Title
Adding items to List<> of object which already contain data, add duplicate item in the List
singulars
PostAcceptedAnswerId
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USShan
plurals
PostLinksPostIdRelatedPostId
1. PL
  singulars
  LinkTypeLinkTypeId
  LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.