Develop Reference

Use datatemplate without listview

I would like to know if it's possible to use a data template and a list system without the listview controller on xamarin forms.

You can definitely roll your own controls that use the templating engine. It would just take a whole lot of additional work with custom renderers for each platform etc. If you want to look into that you can check out the source code for Xamarin Forms since it's open source to see how they implemented the ListView. I think the negative voting is because this is quite a broad question that doesn't have an easy answer.

JAWS accessiblity software with .Net

I have a XAML form on a desktop application running .net 4.5 that dynamically changes the forms displayed on the window based on the selected comboBox.
My issue is that JAWS accessiblity software is reading the my combobox name incorrectly. Instead of reading the correct label for the field it's reading a hidden label.
Is there a .Net accessibility class that will help for screen readers or is there a XAML .Net attribute similar to the "aria-hidden"? Which hides fields from screen readers, which I could do dynamically.

So as we hashed out in the comments, JAWS adopted full UI Automation support years ago which provides folks on the dev end multiple quick/easy ways to get around some of the Accessibility hurdles.
For your instance it's all about AutomationProperties to instruct the reader what it actually cares about. Kind of an adhoc equivalent to aria stuff you're probably familiar with from the HTML world.
In any event, AutomationProperties.LabeledBy (or in other scenarios AutomationProperties.Name) give you a quick way to define the readers only respected string context to define an object or a section with a description it will apply only to that object, or to that object/panel and it's children as the source of truth as far as the reader is concerned.
Hope this helps, I mean who doesn't love being a hero? heh, cheers!

Navigating between parental panels

I have problems with editing panels in C# windows forms(Visual studio 2008). I placed some panels into another, and now I have problems with navigating panels inside parental containers. Is there any tool that gives not only drag-drop control, but also tree view of container and panels in it. For example, like Navigator window in NetBeans(IDE for Java). Any help?

I'm not sure about VS2008, but newer versions have Document Outline Window (View > Other Windows > Document Outline)

To not get lost in controls, consider to name them properly. Then you can find them in the list of Properties window.
Instead of label1 use labelInputName, located on panel1, which you also rename to panelInput. This gives parent/child feeling and you will never lost.
If you get lost, use Document Outline window to see tree-like relation via Controls property (who is control of who). This window is a helper (help to find and select control), you will still have to use designer to do changes.
Another important thing is UI design. Whenever you get cluttered or bulky feeling, than it's the time to change something.
Making UserControl for repeatable part is one way.
Another is to differ design and run time (what you see in designer): to example, if you have several panels, which has to be shown at same place, then you can use dynamic container for them (FlowLayoutPanel, TableLayoutPanel) or you can have them placed in a way for you to easily see them in design-time, but their position will be corrected during run-time (to example, in the constructor). Prioritizing designing is a must if you are going to support project and edit functionality in next versions.
p.s.: talking about winforms, but all said should be true for wpf as well.

How can I create/skin a C# UI?

Ive been working on a C# project for a while now and I fell it needs change its look.
I have found a UI kit that I really like, which can be seen below:
http://medialoot.com/item/transparent-ui-kit/
Does anyone know how to do this?
Thanks
EDIT: Im using WinForms
EDIT2: Maybe I should convert over to WPF? Is this doable?

You can subclass most common controls and draw their appearance yourself. However, unless for novelty applications I doubt your users will thank you for doing so.

Your example is a library of controls. For you to have an appearance such as that you'll have to create or acquire a similar library of controls and replace all your controls in your project to get that appearance.
If you want to update colors (background, foreground, etc.) and such you can make a class that recurses through controls and sets the settings using reflection and a switch statement to process each control. Then just run this on each form before you show it. One word of caution about this, some controls don't respect your changes and get overridden with themes from the OS (datetimerpicker being the biggest culprit). You'll also need to consider whether your users will appreciate the extra work put in for color/appearance changes.

If you don't have very good design skill and have a good know how about creating such templates, its better to buy them.
And C# is just a language. You're looking to create templates and skins for either for ASP.NET website/application or for windows forms.

Have a look at DevExpress Skins
If you can afford it.

Use Dependency Properties for global properties

I am new to WPF. I have been reading a lot about WPF and dependency properties. My understanding of Dependency Properties is to bind properties to XAML (XAML being the target). I have envisioned a program in which a single configuration window would control all visual elements of the rest of the program (font, font size, colors, etc).
In my first attempt, I created a separate window that would contain all the different configuration options. This failed because I was unable to figure out how to use the dependency properties in separate XAML files.
Also, the dependency properties can only be registered in a class that implements directly or indirectly the DependecyObject class. How do I know which wpf objects implement it? It appears the window does not, but I could be wrong. My second attempt was this, to register the dependencies in the top window, so the whole visual tree would have access to it. I had exceptions being thrown and the only thing I could think of was that the window does not implement to DependencyObject. (I could be mistaken, and the visual tree thing is still sort of a mystery to me. I am learning though)
So now I'm at a loss. Is what I am attempting even possible? The whole purpose of this project was to help me learn WPF and now I'm wondering if I should lower my expectations of what I can accomplish with WPF.
Edit:
What kind of exception? What are you trying to do? Could you paste some code?
public partial class MainWindow : Window {
public Color BackColor {
get { return (Color)GetValue(BackColorProperty); }
set { SetValue(BackColorProperty, value); }
}
public static readonly DependencyProperty BackColorProperty =
DependencyProperty.Register("BackColor",typeof(Color),typeof(MainWindow),
new UIPropertyMetadata(0));
It appears that Color was causing the exception. I changed it to int and no exception was thrown. So are primitive types only able to be registered?
WPF is a framework to help you bulit really good looking apps (it includes also Printing etc.) What are you trying to do? Should it be a part of Visual Tree?
Again, this project was only meant to get me to learn WPF. My idea was to create a main UI with different pages. A configuration button would bring up a window with options to change font, fontsize, background color, etc. These changes would be applied in the main UI as the user made the changes. My issue has been how do I access those dependency properties outside of the configuration class where they were registered? How do I have one window that can have slider and combo boxes, and any other class can access those configuration settings?
Put simply, I would like that a single configuration (fonts and colors) be somehow inherited by all UIs. And that that configuration can be changed and seen by the user.

Also, the dependency properties can only be registered in a class that implements directly or indeirectly the DependecyObject class. How do I know which wpf objects implement it? It appears the window does not, but I could be wrong.
http://msdn.microsoft.com/en-us/library/system.windows.window.aspx
look at the Inheritance Hierarchy it does implement DependecyObject
My second attempt was this, to register the dependencies in the top window, so the whole visual tree would have access to it. I had exceptions being thrown and the only thing I could thing of was that the window does not implement to DependencyObject.
What kind of exception? What are you trying to do? Could you paste some code?
So now I'm at a loss. Is what I am attempting even possible? The whole purpose of this project was to help me learn wpf and now I'm wondering if I should lower my expectations of what I can accomplish with wpf.
WPF is a framework to help you bulit really good looking apps (it includes also Printing etc.) What are you trying to do? Should it be a part of Visual Tree?

We cannot tackle here the big task of learning a whole new framework and designing your whole program. That will take time. It can be daunting but stick with it.
As for your exception, the problem is that the mysterious:
UIPropertyMetadata(0)
is actually providing the default value for the dependency property and this value must match the type specified in the second argument to Register. Since 0 is an integer and your property is a Color the dependency property subsystem throws an exception. Instead you can use:
UIPropertyMetadata(new Color())
or any other color as the default.

Dependency properties are a newer design specifically created for WPF. One of the problems they solve is to create faster resolves of the property values because they don't use older, slower, techniques (Read up on why they were created).
They are hard at first, to understand, because it's not exactly clear why they are needed when there is support for the Interface named INotifyPropertyChanged. But one main reason (among others) is that if you implement a DependencyProperty correctly, you will be able to change the design time property values of that property in the property window! Now this is a very cool thing to do because you can very easily set all of your default properties that way.
Doing this for the sake of design time property editing allows you to learn a lot more about DPs and why they are used. In fact, some prefer them everywhere, as they just are not that hard to code up.
DPs are also used when creating custom controls using the "Generic" folder method. This is how Microsoft themselves create all their controls.
There are some caveats to be aware of when using them. You cannot see the design time properties of a DPs until that particular control is contained by something else. In other words a UserControl with DPs will not show those Dps in the UserControl design. They will; however, show up in the control that contains that user control.
DPs bring maximum control using Metadata, PropertyChanged callbacks, default values, and Cohersion and other techniques which give you 100% control of what they contain. The DP is the ultimate in property control.
Keep scouring the internet as there are tons of articles out there on the topic.