I'm learning SketchFlow and am working with a sample project I've created. The basic idea I'm wanting to prototype is having a list of beverages (which are bound to some sample data) and allowing the user to add one or more to their order. When they click the add to order button the selected beverage from the listbox would be added to the order listbox on the right.
Perhaps I'm overthinking this, but there doesnt seem to be an easy way to do it without the marjority of it being done in the code behind.
Or is this something that shouldn't be prototyped in sketchflow?
Any suggestions?
you should be able to bind it the right list with new datasource instead, cause the idea here is not to write and get involved into coding more than its a protoype tool, so try to get around by bind the right list to new datasource which include the list u added from the left hand side
Related
I am struggling some time with checkbox control in WPF. What I am trying is to to make some kind of filter.
1. So first I need to fill the checkbox control with the database items
2. Second I need to check if anything is checked
3. Third if anything is checked I want to take those values and use them to search through the database
4. Should I use only checkbox control for this or should I put it in some container or a listBox?
I have find many topics here that are mentioning this stuff, but I couldn't manage to find the complete answer, only lot of parts that are not compatible with each other. I would really appreciate if someone explain to me how checkbox in WPF works.
If you have multiple values and you want to display multiple CheckBoxes, one for each of them, then you will need to use a ListBox and have the TemplateItem a CheckBox. This way your collection of items is bound to the ListBox, and for each item in the ListBox a CheckBox is shown.
So to get each of the values after there is an additional step if your doing MVVM and don't want to touch the UI. What you do is create a wrapper class that sits around your class and has a extra property for the IsChecked data. This way you can get the checked state without touching the UI.
I have an example of this on my blog:
Checked ListBox in WPF
To check which items are checked you just need a simple LINQ query. So if you use the example there from my blog then you should be able to do something like this:
var checkedCustomers = Customers.Where(w=>w.IsChecked).ToList();
I'm pretty new to c#, the first thing that I'm trying to make is a ListView with data bindings which has turned out ok.
I'm now trying to make items have a twist button if the underlying model has any children (like the TreeView). Each of the children will have columns the same as all the top level items.
How would I go about doing this? Is there an already existing control like this? If not would I be better off dressing up a TreeView to look like a ListView, or dress up a ListView to look like a TreeView?
I went down the road outlined in this solution which dresses up a TreeView, but the end result looks pretty awful and the heading is actually just an item, so you lose all the nice column sizing and column buttons that can hook up to column sorting that you get in ListView so that route actually seems like it would be more work.
I noticed the new task manager has a control exactly like what I'm trying to create, I don't know how this made? probably in C though.
Microsoft provides a sample that appears to be what you are looking for. A write-up of the example can be found here:
http://msdn.microsoft.com/en-us/library/vstudio/ms771523(v=vs.90).aspx
When you build and run the example you will end up with something resembling this:
There is a large amount of templating done in the example, so you will be able to make things look the way you want.
What you describe sounds a bit like a TreeListView, and if you google 'WPF TreeListView' you will see some solutions that might be good for you. I have used one from Telerik, but it might be overkill depending on how complicated your needs are.
If you only want one sub-level like the image you attached, you might want to just roll your own using a ListView with a complex DataTemplate for the first column which would show an expander button and a simple ListBox bound to the children items.
Similar to the answer here, except your cell would have a checkbox styled to look like the arrow, the text for the item, and a child ListBox. Then bind the visibility of the child ListBox to the state of the checkbox.
Well it's not playing actually.
I have a database with about 200 list of items in it. I've used DataTable to fetch all the data in single connection.
Then created a windows button that creates new button for all the items.
It is OK and I was able to do it easily.
But I stuck over two things..
First is, I have limited space in my windows form, that's why I want to load only 30 buttons at first and then upon second click event, I want to load buttons for remaining 30 items and so on..
Second problem is, even if i managed to solve the first problem? How to arrange them in proper row/column?
Please help.
Grab an ordered list of records, split it to a list of "pages" (which is also a list of records) and use navigation buttons to change the context of current page.
Why don't you take a DataGridView with a BindingSource and a DataGridViewButtonColumn? With this as a starting point you can simply glue them together by calling:
myDataGridView.DataSource = myBindingSource;
myBindingSource.DataSource = myDataTable;
Update
Surely you can try to do the whole visualization on yourself by using a TableLayoutControl. But the DataGridView is a control that is specialized to visualize data in a data grid (hence the name of it).
The grid view is a very complex control, but it has a lot of nice features which make your results looking more professional by simply configuring some properties of it. For example simply set the property AutoSizeColumnsMode to Fill to simply avoid horizontal scroll bars and set the Column.AutoSizeMode of some columns to e.g. DisplayedCells to enforce which columns should be wrapped, etc.
Also there are a lot of features regarding to data validation, formatting, etc. So i think even if the step-in hurdle is a little higher you got a much better visualization then trying to do all this stuff manually by taking a TableLayoutPanel. Last but not least there are lots of examples about how to use the specific properties within the MSDN and if you get really stuck just search for the problem here on SO or on the web and if you don't find a proper solution just ask a question here on SO.
I'm currently working on making a point of sale and I got it to show items in a ListView that are in the current sale. I did this by DataBinding an ObservableCollection of "Item"-type objects in a static "Sale" class called CurrentSale. Not bad, eh? But I need to add coupons and discounts to my pos now, and it's proving to be difficult with the way WPF is set up.
This:
http://dl.dropbox.com/u/1330689/listnow.jpg
is how the listview currently looks. This:
http://dl.dropbox.com/u/1330689/listgoal.jpg
is my mockup of how I'd like a discount to show up. I think I've got the discount and coupon part of the program under control, I'd just like to make them show up. I'd be super thrilled if someone could show me some sample code demonstrating how to insert a custom listviewitem into a listview that's already bound with data, and with similar characteristics(multiple cells, black background)
I read through this:
Append Items to Databound ItemsControl in WPF
and it looks like that guy's got a similar problem. The solutions given to him were to add a special item to the bound list, or to use a CompositeCollection. I can't add a "special" item to the observablecollection, because it doesn't let me change the background color, and I wanted a cleaner solution. Also, I couldn't really find any documentation on CompositeCollections with ListViews, so maybe somebody can shed more light on it(if it's relevant to my problem)
Thanks :)
I think you should use ListBox instead of ListView and DataTemplateSelector
Create base abstract class and 2 subclasses, for instance: BaseListItem, ProductListItem and DiscountListItem. Then insert specific object in the specific place into ObservableCollection<BaseListItem> used as ItemsSource for your ListBox.
I have a grid (DevExpress XtraGrid, if that matters) which is bound to a LINQ to SQL Entity property.
gridItems.DataSource = purchaseOrder.PendingItemsGrouped;
Well, the grid is being displayed properly,and I can see the purchase items that are pending.
The problem arises when purchaseOrder.PendingItemsGrouped gets changed ... once that happens, the grid does not reflect the changes.
The exact procedure is as following:
The user selects a row from the grid, inserts a serial number on a specific textbox, and then hits enter effectively receiving this item from the purchase order, and inserting it into stock.
inventoryWorker.AddItemToStock( userSelectedItem, serialNumber );
The item gets properly inserted to the inventory, but the grid still shows the item as if it is still awaiting it to be received.
How do I solve this problem?
Do I really need to re-bind the grid so the changes can be reflected?
I even tried instead of:
gridItems.DataSource = ...;
This:
gridItems.DataBindings.Add( new Binding( "DataSource", purchase, "PendingItemsGrouped" ) );
But couldn't solve the problem.
Thank you very much for your time,
Isaac.
OBS:
Re-Binding the Grid works, but my question is ... is that even the proper way of doing things? I feel like I'm miles off the right track.
Calling databind is actually the right approach when you think about how databinding in webforms works. In all examples when databinding to objects, calls to databind happen whenever the collection is modified.
The reason it feels wrong is because its a lot cleaner to use a DataSourceControl, such as a LinqDataSourceControl or ObjectDataSourceControl, where all that stuff is handled for you.
Two things that might help you along this path is when using a LinqDataSourceControl, you might need to override the various -ing methods (Selecting, Inserting, Deleting) etc, in order to add additional filtering and logic.
The other thing that springs to mind is http://multitierlinqtosql.codeplex.com/. Especially the section on Custom ObjectDataSource.
I have not tried it myself but Bindable LINQ allows to achieve it.