c# - WPF - setting properties to themselves fails to fire changed event -

-

Here is a unique piece of behavior. We recently created some code in a WPF MVVM application that looked a bit like this: 

  foreach (var mA in preferences. Where (itm => itm.Preference == "Y")) {Member M = _members.FirstOrDefault (itm = & gt; itm.MemberID == mA.MemberAvertedID); If (m = = null) {m.Selected = true; }} Subscribers = _members;

Therefore, the first default receives a reference for a member, which is updated. The members and members are effectively the same - the former is a property, wrapping it later as a private variable, with an event fire: 

  public supervision qualification & lt; Members & gt; Members {meet {return _members;} set {_members = value; OnPropertyChanged ("member"); }}

The purpose of the members to set up members was to bring the incident to the fire only - but this does not work. As you stepped through, OnPropertyChanged fired the event, but the application did not respond. This, however, works: 

  foreach (var mA in preferences. Where (itm = & gt; itm.Preference == "Y")) {member M = _members.FirstOrDefault ( Itm = & gt; itm.MemberID == mA.MemberAvertedID); If (m = = null) {mtc.selected = true; }} Var mem = new Observation Collection & Lt; Members & gt; (_ Member); Member = mem;

I am assuming what is happening here is that setting members as members is effectively the property's setting, code has been "estimated" that something Has not changed, and leaves the incident. But I am not really satisfied with this explanation. Can anyone tell me what's going on here?

The binding list will not change the list until the archive reference is different, so the last of the code The piece is working. He said, unless you are actually adding or removing items from the underlying _members list, you should not redeem the entire list.

If your goal is to refresh the status of the selected member, probably you have been selected from selected from the property OnPropertyChanged (" Selected ") is decreasing.

In summary: The property that is changing should be named in the event converted into property. In this case, the WPF need to raise the notification on the member example to change the property in the selected property, and the incident should come from the object that is the owner of the property. / P>


Comments

Post a Comment

Popular posts from this blog

java - Can't add JTree to JPanel of a JInternalFrame -

-
Image
There are two panels in my JInternalframe. I want to add TopPanel to Jtree to nominate another. But I can not add Jaitari to the top of the panel. Please help me in this piece of code: DefaultMutableTreeNode root = new DefaultMutableTreeNode ("deck"); DefaultMutableTreeNode Item Clubs = New DefaultMutableTreeNode ("Club"); AddAllCard (itemClubs); Root.add (itemClubs); DefaultMutableTreeNode item = New DefaultMutableTreeNode ("Diamonds"); AddAllCard (itemDiamonds); Root.add (itemDiamonds); DefaultMutableTreeNode Itemspads = New DefaultMutableTreeNode ("Spades"); AddAllCard (itemSpades); Root.add (itemSpades); DefaultMutableTreeNode item increases = new DefaultMutableTreeNode ("heart"); AddAllCard (itemHearts); Root.add (itemHearts); Default Trimodel Tree Model = New DefaultTreeModel (Route); Tree = new jetty (tree modal); ScrollPane = new JScrollPane (tree); // scrollPane.setViewportView (tree); . ScrollPane.getViewport () add (tr
Read more

javascript - data.match(var) not working it seems -

-
OK, I have this small block code, which is to scanned a number on the website, but for some reason There is a hip that it is not scanning at all. var regenges = / \ & lt; Span class = "currency-robux" data-to-"item-private-value-price" & gt; ([\ D,]) \ & LT; \ / Span \ & gt; /; Var ValueCiling = Data. Match (reggae); Value-song = number (value slicing location (",", "")); Is there anything wrong with that? This is related to the if statement if (value sling and lieutenant; = price watching) { < P> A function calls to move from there, but for some reason it does not seem to run at all. So I think the Regex is wrong but I'm not sure how. (There is a variable in PriceWinking , this is a snippet from the code.) On the website, I'm trying to remove it. & lt; Span class = "robux" data-plus = "item-privatesale-price" & gt; 115 & lt; / Span & gt; Keep in mind
Read more

javascript - How can I pause a jQuery .each() loop, while waiting for user input? -

-
Before I continue to get a jQuery .each loop to wait for user input There is a problem in repeatedly repeating This is my code (I have commented on what I would like to do): & lt; Html xmlns = "http://www.w3.org/1999/xhtml" & gt; & Lt; Top & gt; & Lt; Link rel = "stylesheet" type = "text / css" href = "common_components.css" /> & Lt; Meta http-equiv = "content-type" content = "text / html; charset = UTF-8" /> & Lt; Link rel = "stylesheet" href = "slider.css" & gt; & Lt ;? Php include_once 'common_components.php'; $ Query = $ dbh- & gt; Queries ("SELECT movies_dir FROM settings"); $ Line = $ query- & gt; Obtain (PDO :: FETCH_ASSOC); Date_default_timezone_set ('UTC'); Echo "& lt; title & gt; movie scanner & lt; / title & gt;"; ? & Gt; & Lt; Script src = "jquery.min.js" & gt; &am
Read more