I have a xaml which contains a tab control (Name="MyTabControl"). I'm a beginner with wpf and in code and I want to dynamically add tab items that I then add a list box to each created tab item. Below is the code I have so far.
ListBox listbox = new ListBox()
TabItem tab = new TabItem()
tab.AddChild(listbox)
MyTabControl.Add(tab)
My issue is that I can't figure out how dynamically create new tabs that also would add a list box to each new tab and the new tabs then added to MyTabControl.
Then, I would want to be able to access each list box control, individually, in each tab to edit the list box content.
How is this done in code? How can i access the created list box controls to edit them?
WPF/UWP and XAML are designed with the MVVM pattern in mind. While you can use other approaches, doing so will miss about 90% of it's power and run into issues at every other corner.
In MVVM this would be simply a mater of Exposing a Collection and having a Tempalte targetting that type. ListBoxes might even have a custom Template system, but using ListBoxes might no longer be nessesary - any container can expose a Collection.
If you plan on learning MVVM, mid to longertem you should learn MVVM. I wrote a short intro a few years back, that should help you going. Help for people not following MVVM is parse on the Forum.
In general, it's a violation of the MVVM principles WPF is built around to build a UI in this way. Instead, consider a solution similar to the one proposed in the answers to this question. They do a good job of explaining both what to do, and why we do it this way.
Related
I'm creating a WPF program that consumes rest api data. I want to implement lazyloading and infinite scroll on the data and programmatically create and add either custom data templates or listitems very similar to this design
I'm just confused as to which approach to take and what benefits/costs each provides
Easy choices:
Everyone uses MVVM so use MVVM.
Data Templating is a fundamental of wpf and building UI in code is not recommended - so use data templating.
You can dynamically add templates to resources by building xaml as strings. This is the MS recommended way to build any dynamic UI. Those strings can come from flat files, a database directly or a web service and you can build them by manipulating txt files or serialising controls.
A huge plus of this is you have the markup "right there". So when things go pear shaped you can paste into an experimental solution and see the errors light up in the xaml or see what the user is seeing.
If datatype associated templating doesn't suit for some reason then you could write a datatemplateselector and put your logic in there.
I'm not sure how you expect that to scroll exactly but I'd go with a listbox, some datatemplates associated with a type per view. Assuming the items can have different views - you just seem to have that "gilded" button or tag as an option.
Load your data into viewmodels with one per row.
.Add to an Observablecollection which is a public property in a viewmodel.
Bind that to the itemssource of a listbox.
They are then templated into UI.
A listbox has a scroller built in but you could re-template if you wanted to scroll using some other approach.
A StackPanel is a Panel that arranges child elements into a single line that can be oriented either horizontally or vertically.
A ListView is an ItemsControl that you can bind to an IEnumerable of objects and is used to present a collection of items.
What you should do is to create an ItemsControl with an ItemTemplate that corresponds to a scrollable item in the list. There is a basic example available here and you will find a lot more examples online.
I have a list of custom controls that should look something like this
Before I start to implement them through a custom or user control in WPF (via MVVM), I want to ask if I do everything right. I create a DataTemplate and binding properties I need (these are the numeric values (0.13) in columns) and ItemTemplat'ing it to listview or listbox. Also I'm having an observable collection of viewmodels for these templates and every viewmodel sends some specific numeric data through short intervals from slave device. Also I need this green element to be clicked (just to add a button to a template I guess) and having displayed an additonal window with real time plots. So my question is: Is this the right approach I'm talking about or do I have something wrong? I'm quite new to WPF, so please excuse me. I dont think that it is a great challenge to implement something like this.
I'm rather new to this model as well, however one thing I have found that has helped me with managing multiple View Models has been an IOC Locator. An example can be found here:
http://dotnetpattern.com/mvvm-light-toolkit-example
Hi guys I have a problem
i need the info I enter in a text box on my main window to update a label on my second window called script.
The text box name is client and the label name is client-label
I have tried many different ways to do this and still not coming right
how can I do this?
PS. I am new to the programming world so please give me step by step instructions anywhere possible :)
Pertinent to your requirement (i.e. two WPF windows with sync controls), it will require quite a bit of coding. Better (simpler) way is to create a pseudo-window, i.e. just a nested layout Grid within you main window containing all controls pertinent to that second window (you can set its visibility to collapse/visible in order to "simulate" pop-up window), and update a second TextBlockon .TextChanged event of the first TextBox (using code behind). Alternatively, you can apply data binding technique is XAML of the same single window.
Note: you can implement a splitter control to resize two 'sub-windows'.
In case you do prefer to implement second window, then refer to this example: Data Binding between two TexBoxes in different windows
Rgds,
The "correct" way for this would probably be to have a view model for each view part in your gui and have them communicate through events.
The Prism framework for WPF will help you with most of the plumbing for this.
Se more about Prism here: http://compositewpf.codeplex.com
I am wanting to build a WPF custom control that displays validation errors - one at a time - in a ribbon that goes across the top of the screen.
An ItemsControl or Selector sounds like a potential base class candidate, but my requirement is that only one item is shown at a time and the user will click on forward and back buttons on the ribbon to navigate through the validation errors.
Is it possible to use an ItemsControl in this way? To only show one item at a time?
Is there a better strategy for this?
I appreciate your thoughts and expertise!
This article should cover everything you want to do. The FlipView basically behaves like an ItemsControl and shows one item at a time by providing forward/back buttons.
Hi friends, Am newbie for windows Development .i have created Grid With tabcontrol using silvelight OOB(out of browser app) .Able to add tabitem at run time by following code
TabItem tabItem = new TabItem();
tabItem.Header = "tab";
tabControl.Items.Add(tabItem);
While adding more no of tabitems, tabitems are added to new line automatically ,instead of scroll enable like google chrome browser.Any property is there to add Scroll???
i have gone through msdn documents but couldn't find anything.Some of the stackoverflow answers say third parties control but am not interested to use those.i want to do my own .Possible give some guidance to get my solution.
If you want to have scrollable tabs in stead of having them appear on multiple lines, you will need to either create you own tabcontrol from scratch, or create a tab control style in which you override the control template.
If you are completely new to silverlight (and xaml), this might be too difficult for you to do. I do not believe there is a simple way to do this, as this functionality is just not part of the standard tab control.