Ways to improve your writing

ways to improve your writing

16 Easy, ways to, improve, your, writing, skills wordStream

In general, beware of memory leaks This is a bit of a generalization of the last few points, but memory leaks make apps behave worse over time. Fixing memory leaks goes a long way in fixing the performance of an application. And since most developers are constantly restarting wpf apps as they work on them, they often go undetected until the software is delivered. Has this ever happened to you? Youre driving to work. Or reading a book.

7 ways to improve your writing skills - is It vivid

Because of wpfs references to your business objects, it is not just enough to drop references to your view and view model. A better alternative is to rely on data binding where you can; create a dependencyProperty for the sole purpose of listening to changes on your target property, and use the change notifications in DependencyProperty in order to listen to changes on the target property. It keeps the observed object (generally, your view model) from accidentally holding a strong reference to your view. Be careful of view model events If your views or behaviors rely on events being raised from a viewmodel (as innocuous as opertyChanged or llectionChanged subscribe to them weakly. Viewmodels tend to have a longer lifetime than views (consider a virtualized ItemsControl so its possible that your view model will inadvertently gather references to views. Use classes like propertyChangedEventManager or CollectionChangedEventManager, or (painfully) use the weakeventManager to create your own event manager for your custom events. Its painful, but usually necessary in order to prevent view models from taking references to views. Batch up ginInvoke if your application displays data from a network, youre sindhi probably using background threads to accomplish the task (which is good). However, youre probably not consciously counting your ginInvoke calls (which is not as good). The more youre able to coalesce multiple ginInvokes into a single call, the more likely wpf will be able to help you out by making single subsequent layout and render passes, and the lower your overall cpu usage. To be fair, wpf is much better at trying to help you here than VB6/WinForms—you wont often see apps that dance and flicker incessantly any more—but there is still a non-zero cost to updating the screen, and if you have a particularly large application, this.

OnDetaching will generally not get called. Put a breakpoint and see for yourself. OnAttached signals the addition of a behavior to a control (generally at instantiation of your best xaml onDetaching signals the removal of a behavior from a control (generally never, as behaviors dont get removed from controls). Dont put sensitive disposing behavior in OnDetaching. The Unloaded event is a better place for that, but be aware that it will get raised every time the control is removed from the visual tree. Do not use dependencyPropertyDescriptor for any reasonever dValueChanged classes cause the wpf framework to take a strong reference to the source of the event that isnt removed until you call movevalueChanged. This class is frequently used in conjunction with Behaviors, so if you have removevalueChanged in OnDetaching, youre likely leaking memory.

ways to improve your writing

Ways to, improve, your, writing

Windows.Application object, almost always difficult or infeasible for composite applications. I have also frequently taken to creating static classes that reviews contain nothing but highly reusable resources (think static framework classes like the Brushes class) because its easier to guarantee that objects are only being created once, and hopefully at app startup instead of triggered. Not necessary the healthiest design, but the performance is quite a bit better. Using implicit ControlTemplate/DataTemplate styles will also help keep your code and xaml organized without the need for either StaticResource or DynamicResource. Simplify your visual tree shallow visual trees are better than deeper visual trees. Again, ItemsControls will usually exacerbate performance problems with deep visual trees because if theyre not being virtualized, theyre being destroyed and recreated; if they are being virtualized, changing DataContext in a deeper tree takes more time than changing DataContext in a shallower one. Be wary of havior. OnDetaching Sadly, havior.

There is a huge cost in constructing ResourceDictionaries, and depending on where you place them, you are probably constructing many more objects than you realize. A common, sensible, and logical pattern is to keep usages of elements as close to where you use them as possible. Many people place resources in sources, or break up their themes into multiple resourceDictionaries for clarity and separation. Although this is arguably good programming practice, it also tends to be insanely slow. If your windows/controls or your ListBoxItem/ListViewItems in a listBox/ListView are coming up more slowly than you would like, its probably a combination of too much ResourceDictionary construction and/or DynamicResources. Net.0.) Collapse resourceDictionaries as much as you can, and try to ensure that the contents of these dictionaries is only loaded once. The easiest and surest way is to include it in the resources of your System.

How to, improve, your, writing, skills in four, ways, aha

ways to improve your writing

Ways to, improve, your, writing, the Writer's Pulse

Raise inotifyCollectionChanged as sparingly as you can. Raise the event with a set event for anything more trivial than a simple single-item add, remove, change, or move. Do not take advantage and of the constructors that take collections of items; you will find support for it spotty at best. Implement assignment ist on your collection. Wpf does not use the generic ist t interface; it is completely ignored. If you dont implement the interface, wpf will perform almost all operations (including accessing rows by number!) strictly by the ienumerable implementation, and it wont be very optimal or fast about.

(Probably) implement ist t as well. Wpf doesnt use it, but you probably will (through linq, rx, etc.). Avoid DynamicResources even. Net.0, dynamicResource access is still slower than StaticResource access. And worse, once you start nesting DynamicResources (for example, a listView whose Style contains a controlTemplate that references objects through DynamicResources youre likely to run into situations where you leak controls. Avoid ResourceDictionary This advice is practically impossible to follow, but do your best.

Create a collection with mixed viewmodel typesyour original collection, and one that represents the group. Use dataTemplates to change the appearance of your group objects. For example, if you have a personViewModel class with a property that you want to group by (lets say region it is faster to create a mixed collection of mygroupViewModel and PersonViewModel objects, ordered correctly by group, with different DataTemplates, than it is to bind. Unfortunately, its a lot more work. Optimize bindings to collections that change repeatedly calling when the collection is data-bound can be a prohibitively expensive operation, especially with thousands of rows. Unfortunately, the framework provides no easy, satisfactory fix.


Fix 1: Use ObservableCollection as-is, but break bindings Break the binding to the collection. Update the collection while not data-bound. some methods removed for brevity public partial class myviewModel : inotifyPropertyChanged private ObservableCollection t _people; public ilist people get return _people; private set if people! Value) _people value; OnPropertyChanged people void newPeople) var currentPeople _people; / stop wpf from listening to the changes that we're about / to perform ople null; / change foreach (var person in newPeople) d(person / cause wpf to rebind-but only once instead of once for. Net.0-era collections instead Use ndingList t (from the old days) instead; it has an api for suppressing change notifications. Fix 3: reimplement ObservableCollection. Create your own collection that implements inotifyCollectionChanged.

5, ways to, improve, your, writing - dreamstone publishing

Avoid ndAncestor expressions at all cost thesis here, because the deferred behavior of templates cause the object and its bindings to be created (and resolved) before the listBoxItem/ListViewItem is added to the visual tree. An alternative is to define an attached dependency property on the listBoxItem/ListViewItem, and use property inheritance to give your child items the necessary property values. This essentially pushes property values down the visual tree instead of searching. Hard-code sizes where possible This may not always be a practical or desirable solution, but layout passes perform faster when widths and heights do not have to be recalculated. They may also help stop a layout pass from rippling through an entire visual tree. And always set specific widths on columns in a grid (be it a listView GridView or any third-party control because these tend to be very expensive, especially with larger data sets. Avoid ouping Grouping in wpf doesnt perform terribly well, especially with ListViews and GridViews.

ways to improve your writing

Be wary of them, and try to use inherited attached properties instead of relying on Relativesource in DataTemplates. Viewmodel bindings make sure that your life views and view models are in sync. Use resharper 6 to help you find broken bindings. If youre binding to a collection of objects with mixed types, add different DataTemplates so that none of them refer to non-existent properties. Make sure that your converters arent throwing exceptions. These have a cost too. View-based Relativesource bindings When using ListBoxes and ListViews, its a common problem to have this problem.

leaks. Fix Binding Errors and Exceptions every time a binding error occurs, your app hangs for just a split second as it writes out errors to the trace log. If you have a lot of binding errors, then those split seconds start to add. Make sure to go through your bindings, especially those on ItemsControls (ListViews, custom grids, etc.) and verify that there are no binding errors. Open up your app in the debugger and play around, especially where there is slowness. Make sure all bindings resolve without errors. Relativesource in DataTemplates may also result in bindings that break initially, but then later resolve properly.

Also, it can be difficult in wpf to know exactly when the system is finished with an object. For views, you get the. Unloaded event, but it gets raised at times you might not expect (such as system theme changes) and not at times when you might (application shutdown). On viewmodels associated with views, youll never get a wpf notification that a viewmodel is about to go unused by a view. Blend-style behaviors also have their own set of lifetime problems. Then there are some problems (like this the and this ) where wpf leaks for you too. Finally, there are things ( this, this, this, this, this, and this ) that simply perform worse than you likely expect. Finally, there are old UI/WinForms problems ( this, this, and this ) that never really went away—theyre just less likely to happen. Fix Binding Errors, hard-code widths and heights where possible.

4, ways to, improve, your, writing, this year

There is no shortage of information out there on how to speed up the performance of wpf applications, but too often the focus is on the weird stuff instead of the simpler issues. Im not going to talk about things like writing. WritableBitmaps to optimize drawing—its a topic covered to death elsewhere. Instead, this is meant to be a slightly more practical guide to squeezing performance out of wpf in ways that are probably more likely affecting you. Some general notes, itemsControl and general its subclasses, listBox and. ListView exacerbate performance problems because these controls are highly dynamic (resolution happens late involve wpf collections (which are slow and have difficult and unpredictable lifetimes for their child controls. Scrollbar performance is often a big problem in larger wpf apps because of problems that seem trivial for small collections, but suddenly blow up with larger data sets.


Ways to improve your writing
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  7. Fix 2: Use the older. Net.0-era collections instead. Use ndingList (from the old days) instead; it has an api for suppressing change notifications.; Fix 3: reimplement ObservableCollection. Create your own collection that implements inotifyCollectionChanged. Improve project Management by documenting Project Requirements. There is not better way to improving project management than by improving your understanding of the projects objectives.

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