Using a C# 3.5 Winforms -
Is it possible to nest one listview inside another? The idea is to a list of lists - The higher level list would be groupings and the lower level list would be the details.
UPDATE:
Nesting does not appear to be possible. However using a FlowLayoutPanel I can add many listview controls into it and the panel takes care of automatic layout control. Using grouping in each listview helps to identify what each list is.
I don't believe it is possible (and certainly not recommended) to nest a WinForms listview inside another. However you can enable grouping as described here.
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 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.
I'm working on something like a download manager on C#, and I need to implement a download list that has to support the following features:
1] The list should support scrolling2] All the list elements have a url, and some other data + icon
3] Selection, and multiple selection.
How can I implement this kinda of list? I there an already created control I can use?
I started to implement it using a flowLayoutPanel and custom controls for all the list items and handling the Click events of the custom control. I'm not sure that custom creating this would be the right way to go.
Any help would be highly appreciated.
If you're using WinForms, you can use a ListView control, which supports these features as standard.
Use DataGridView and implement custom cells/columns for it by inheriting from DataGridViewColumnand DataGridViewCell.
If you decide to use WPF, you can use a ListView, with scrolling options enabled, with a GridView on top of it.
http://msdn.microsoft.com/en-us/library/system.windows.controls.listview.aspx
C#: What is the best way to implement a 'filter' mechanism for ListView Items?
I want to filter out some listview items from view in 'details' mode where it contains rows and columns. What would be the best option to create such a mechanism where I could rapidly remove the items in question from view, leaving the others intact, and putting them back into the listview when there is no more need to filter out listview items? Should I remove/copy them to a List and just and add them back when done or would there be a better method of doing this more effeciently? The listview will be handeling about 100-500 items.
If you are working with a databound control you will have this facility within the binding framework.
If not, I would probably store all the items for the list separately and populate the control in full each time, based on any contextual requirements such as filtering. The code to iterate through the list and move items not required at present is probably unnecessarily complicated. A full repopulate each time will be easier and won't differ much in terms of computational expense.
This behavior is built in to BindingSources using DataSets in .Net 2.0.
For .Net 3.0+, you can use LINQ.
In our project, SharpWired, we're trying to create a download component similar to the download windows in Firefox or Safari. That is, one single top down list of downloads which are custom controls containing progress bars, buttons and what not.
The requirements are that there should be one single list, with one element on each row. Each element must be a custom control. The whole list should be dynamically re-sizable, so that when you make it longer / shorter the list adds a scroll bar when needed and when you make it thinner / wider the custom controls should resize to the width of the list.
We've tried using a FlowLayoutPanel but haven't gotten resizing to work the way we want to. Preferably we should only have to set anchoring of the custom controls to Left & Right. We've also thought about using a TableLayoutPanel but found adding rows dynamically to be a too big overhead so far.
This must be quite a common use case, and it seems a bit weird to me that the FlowLayoutPanel has no intuitive way of doing this. Has anyone done something similar or have tips or tricks to get us under way?
Cheers!
/Adam
If you don't want to use databinding (via the DataRepeater control, as mentioned above), you could use a regular Panel control and set its AutoScroll property to true (to enable scrollbars).
Then, you could manually add your custom controls, and set the Dock property of each one to Top.
.NET 3.5 SP1 introduced a DataRepeater Windows Forms control which sounds like it'd do what you want. Bind it to the list of "downloads" (or whatever your list represents) and customize each item panel to include the controls you need.