There are two ways to do this:
1. Bind the DataGrid's SelectItem to a property in your ViewModel (or code behind if you're not using MVVM ), then in the setter for that property populate properties for the TextBoxes, ComboBoxes etc.
This method has the advantage of being able to add a Cancel button.
2. Bind the TextBoxes, ComboBoxes etc to the DataGrid's SelectedItem property. Something like this:
I create a library of these classes contains a user control that contains images as background to some button, I add it to the main page such as referance, I added this code to retrieve the control xaml user
Your error is going to be in the myeditor usercontrol. Like Jeremy suggested check to ensure that your image sources on the control are correct, and that the control is able to locate them during runtime.
I'm working for the first time in WPF with MVVM pattern and I have a datagrid that is populated according to search terms in textbox on top. Right now, I'm able to populate the grid with all the data but I'm not able to get the value of the TextBox so I can filter it.
So here's a bit of the code:
p_searchName = value;
I assume the default for UpdateSourceTrigger is LostFocus, and it is set that way for performance reasons. Every time you call the setter, the setter raises the OnPropertyChanged event, WPF listens to that event and calls the getter.
The WPF textbox has a default UpdateSourceTrigger of LostFocus, which means that it only updates it's bound value when the user focuses on another control. By changing the trigger to update when the property changes, it updates it's bound value every time the user enters/deletes/changes a letter. Here is the MSDN page that discusses this How to: Control when the TextBox Text Updates the Source[^] .
Hope this helps
When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman
Every time I look at learning about DP's, I walk away confused.
Anyone know of any decent entry level tutorials?
What's confusing about them?
By now, I assume you are familiar with data binding? Well, as you know... in order for the WPF UI subsystem to know when to update a UI element, it needs to know when the data value has changed. It needs to be able to know that on ANY object, so there needs to be a standard mechanism.
In fact, there are two standard mechanisms.
1) INotifyPropertyChanged / INotifyCollectionChanged - this is how you implement your view models & business objects... typically you'll have your ViewModelBase / ObservableObject base classes and derive everything from them
2) Dependency Properties - Generally, you shouldn't really need to use them in user applications since mechanism #1 is favored for that and DPs are a relative PITA to implement (vs mech #1). They are just objects that are stored by the framework instead of in your object and automatically implement change notification. I generally like to use them in custom controls only.
The benefit of DPs is that you don't need to liter your code with OnPropertyChanged("Foo"); type code.
The downside of DPs is that you have to 1) register them (around 2 to 10 lines of code depending on what options you use) 2) implement getter & setter (just call GetValue / SetValue).
There is a Visual Studio macro that spits out the code, so no biggie.
If you want to hook into the change notification, you need to register a STATIC callback, redirect into your VM, etc.
Just a royal PITA.
Basically, you should only use DP's in controls.
EDIT: there are some features that require use of DPs such as animations.
Hello guys anyone has the code of how to move an image from one place to another using the mouse in silverlight ? I still want the image that has been moved to another beneath it so that it can also be moved up or reach a certain number.
I have huge amount of data (months to years...every 10 seconds) from different data sources.... ( As shown in three blocks in the link)
I want to visualize the the data from three different data sources on a common timeline.
I should then be able to drag the timebars to select a particular window of data. If all the data is present between the timebars it should turn gray.
The requirements are kind of similar to meeting scheduler. I have a SNAPSHOT of the Lotus Notes Meeting scheduler. It is kind of cool as it shows resource availability (also resources are grouped) on a common timeline.
1. In the above link it has divided Resources into groups(Invitees, Scheduled Rooms, Resources)
2. It has a time scale in hours.
3. Each Row in the group... say...Robert has his availability listed in time. Similarly the availability of Room1, User1, Projector is also listed.
4. Now I know when are all the resources available. So, I drag the vertical green bar to the space where all the resources are available.
5. I can schedule the meeting.
6. I can also adjust the start time and end time by dragging the ends of the green bar left or right.
I hope you got my question.
I am looking for a WPF or Windows Forms project. I could not find any similar project online. I would appreciate any help. Thank you.
I want to develop an application(control pc via wp7 ) but the WP7's screen show the PC's screen.
So how I can do it? what I need (protocol RDP, TCP/IP)???
and how can I do a connection between WP7 and PC?
I want to use validator for validation and warning purpose at entity level, is it possible?
Suppose I have Email-Id property in PersonalDetail entity, Now I have applied two validator 1st is Required validator and second is Length(20).
If user not insert anything in email textbox then validation should fire and stop user to create new deatil, but if user has insert email id but it's length in less then 20, then there will be only warning message, but entity will allow user to create detail...
Is it possible in Silverlight with the use of validator.
Long time since I posted here! Hope we're all well.
I'm literally on my last day on my current contract and this topic has just been floated!!
I've built a PRISM / WPF / R based application for this contract and they have decided to investigate offering it as a web based thing as well.
Anyway, I've just been having a play with Project Linker and so far I'm seeing it as more of a hinderance than a benefit. Yes it does some fiddling for you but the fact that it will only work WITHIN a single solution (as far as I can tell) is a tad annoying.
I think I'd prefer to have two solutions and manage the linking manually. Crazy???
I've got the team here using ReSharper and it's frankly rendered that more or less useless in terms of reporting false positives on the solution wide analysis. It's annoying already on a tiny test project with two class files! Moving this into production on the app would be a nightmare!
Does anyone have any practical tips or suggestions for using Project Linker in a more useful manner. Right now I'm leaning towards careful manual management of linking files that we want to reuse in both WPF and Silverlight.
If I'm slightly annoyed by it already moving this into production will only compound that imho ...
A word of caution, mate, from the dark side of having done this in the past. If you haven't designed your application for multi-targetting from the get go, there are all sorts of little incompatibility issues that crop up and bite you. The reason is simple - Silverlight is not WPF. WPF provides features that just aren't available in Silverlight, so if you've used any of those features, you have rework to do.
*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington
Yeah, this I've heard from a number of people and in my write up on this topic I've prepared them for building sufficient time into the project going forward for re-tooling.
Luckily we have used PRISM which should help a little and we already have a good set of 3rd party controls from a single supplier (Infragistics) for both platforms which should at least provide some look and feel consistency.
I've also suggested doing some spikes first to get a better feel for a more accurate effort commitment that may be required. Based on that the next step would be to convert to multi-targetting and only then start the next phases of development.
In my SL app i'm printing some Document with the PrintDocument, and when i call the Print() method it show the print dialog where i can select the printer.
In ControlPanel->Printers i have a printer with custom settings and it's not the default printer. If I print on this printer from SL it's doen't print right beacuse it doesn't take the corect printer settings.
But if i set the printer as Default Printer and try to print from SL , it take right printer settings and print right.
I don't want to change the default printer.
I want that every Printer i select from the PrintDialogBox has the settings that i setted from ControlPanel.
For now only the default printer has the correct Printer Settings.
Wake UP - you need to do it right, work with the data not the control. You have a collection bound to the datagrid and you should have a selected object (an item of the collection) validate the data in the selected object not the control content.
Never underestimate the power of human stupidity