I'm at a loss on this, I have a problem that pops up maybe 50% of the time when debugging. My silverlight app has a situation where I actually open up another tab of the same project
Basically when I try to open another tab it just hangs after it starts opening the tab but never really finishes.
The tabs are the first thing that has brought this to my attention but I think maybe there is something wrong with the state of the browser, I can open the tools menu before I ever open up another tab and almost all options show up as grayed out
Its worth noting a couple things. This is only a problem when I'm debugging, and its reproducable (at random) by everyone on my team.
Related
I had my app working just fine a few days ago and then I noticed the first problem. I had to tap twice in order to make a button go to the next screen. Also happened to the checkBoxes. Had to tap twice to make them change.
But now it got serious. Since yesterday when I tap on a TextField the app freezes and then crashes.
The only significant changes I remember I did were 2: I uploaded an image for the App Icon and I edited the TitleArea UIID. I removed the TOP and BOTTOM margins. It also affected some of my label and button UIID, because now they don't show on the device
When I run the simulator, the doble tap also occurs, but the TextFields work fine and the Button and Label UIID look the way they should.
Any ideas why this happens?
I am right now working with old versions to try to determine the reason, but no luck so far. Thanks
Use a solid color rather than a gradient with the same colors. Gradients are slow and problematic across platforms so you are paying a lot for something that you aren't even using.
We'll need a better test case to reproduce crashing, I think that what you initially saw when you submitted the issue was a regression in the text input that we since resolved in the build servers.
I'm making a Sketchflow WP7 application which is working fine, except Navigation is sometimes buggy. Sometimes when I go to a screen and try and click it doesn't work, some times it does. I'm using the MouseLeftButtonDown Event to trigger it. After it 'freezes' I can no longer navigate via the map either, though before it freezes I can. I'm not sure if any errors are thrown because I'm not aware of a real time silverlight console. Sketchflow doesn't have a 'Debug Project' option only a 'Run Project' one.
It's very unpredictable, sometimes it works, sometimes it doesn't (though some links are more unreliable than others). Sometimes it gets stuck in different screens. I've tested this across browsers and computers and while sometimes a new browser occasionally has a better success rate, something always gets stuck.
I'm afraid I'm probably leaving out some details so feel free to ask for them. I'm not really very familiar with Silverlight and Sketchflow, I'm just working on a prototype so it seems like I shouldn't have to deal with any code based issues...
Thanks!
You might want to look for a Click Event rather than MouseButtonDown as that could be anything, it doesnt mean MouseButton Down, MouseButton Up, which resembles a click. this is just the same as if you use your finger to touch the screen, this would also trigger the MouseButton Down Eventhandler
so if I was you try and use the Click eventhandler for your navigation.
You can open the same project in VS (including the free express editions) and run it in the debugger from there to see if an exception is being thrown. That might help narrow down the problem.
I have a certain UI element, which when clicked should navigate to another URL.
I tried handling the mouse down event and execute something like this:
System.Windows.Browser.HtmlPage.Window.Navigate(new Uri("http://google.com"), "_blank");
However, this gets blocked by the browser (I tried both Chrome and Firefox) unless I disable the popup blocker.
I did some research and it seems that the browser blocks navigations that don't occur as a result of user interaction and as far as the browser is concerned this navigation is initiated by a plugin (Silverlight), not a user.
OK, makes sense. But then I tried using a HyperlinkButton instead and it was NOT blocked.
I wonder why these two approaches get different treatment from the browser. Any idea?
I actually worked around the problem by wrapping the navigation triggering UI with a HyperLinkButton, but I'm still very curious...
I'm going to pull a fancy corporate quote and say "It is a feature, not a bug."
The Silverlight team is obviously worried about Security. They don't want crazy haxorz like you and I to do crazy things with our apps--you know, like popping up a bunch of browser windows all routing people to Zombo.com. Just imagine the choir! Zombo!
Summarized from their documentation: They want us to only use the HyperlinkButton to go outside of their application. In fact, they went the extra step, and depending on our settings, they will even throw a SecurityException for us if we navigate to an outside page--Even from a HyperlinkButton. How nice.
The real question: Why the Hyperlink Button and not something else?
Only one "thing" can navigate. this take saves time for Microsoft while testing Silverlight. This one thing can navigate to both internal XAML pages and external web pages--Might as well be consistent and have only one way to do navigation.
It is a UIElement. It's code behind likes to run in the primary visual thread. It can promise the browser that a Visual Element wants to go somewhere. Microsoft can also put its limiting logic in a control that requires a mouse-click/keyboard-input event tree.
All in all, it makes sense to start simple by making a control do the work.
Fun stuff! Hope this helps you.
I am trying to hit test in Silverlight applications to find the elements under the mouse cursor.
Normally VisualTreeHelper.FindElementsInHostCoordinates works for this. If there is a Popup open I need to pass in the popup to the hit testing method. If there are multiple popups open, I need to determine the correct (topmost) popup to pass in.
Is there any reliable way to determine which Popup is topmost? I'm doing this in an assembly that may be loaded after the Popups have been opened, so I can't rely on tracking the order in which they are opened.
Thanks for any assistance.
It looks like the new VisualTreeHelper.GetOpenPopups call returns the open Popups in order from bottom to top (or least recently to most recently opened?). So that does what I need.
Posting this answer in case anyone else runs into the same issue.
I'm trying to use an existing internal WPF application (I do have access to the source), but it was developed on XP and I'm using Windows7 64-bit.
When I click (for instance) the File menu, 90% of the time I see no drop-down menu at all. The menu still exists - I can use the arrow keys to navigate up and down and choose an option if I happen to know the order of the options, but nothing renders at all.
The other 10% of the time, the menu or some portion of it DOES render, but as I move the cursor up and down I get graphical corruption or disappearing options until I end up back at the "no menu is visible at all" state.
This is also true of combo boxes within the application - they show no data when I drop them down, but I can arrow down and choose an entry.
Microsoft has some advice about WPF rendering issues here but none of these steps has helped with my issue.
Edit: a coworker running Windows 7 sees the menus just fine... he has a different video card, so I'm curious whether this is video-card specific.
This also sounds similar to an issue we had seen in XP, where comboboxes (or menus) would not display properly some of the time. There is a Microsoft hotfix (for at least one flavor of it) here, but unfortunately it is for XP and WS2003. I'm not sure if this could point you in the right direction.
The link to this hotfix was found in this MSDN thread. I am not the author of this particular link, although I do remember raising this issue some time (and a different job) ago.
It turns out that in this specific case, the issue is only present on boxes that have a GeForce 6800 video card. Updating drivers has no effect, but switching to a 7800 makes the issue go away.
I have no idea why this is the case, and I haven't found any information online about 6800-specific graphical issues in Win7 64, but our testing and experimentation shows this is the factor that causes it.
Crazy.
See this question. It's probably a problem with a DropShadowEffect, removing the Effect should fix the problem.
I second that the issue is related to NVidia Windows 7 x64 drivers. Recently I had to replace my video card. Now I have Quadro FX 3400 with the latest drivers and am seeing similar behavior. WPF ComboBoxes don't render dropdown portions. I can only switch values with keyboard after a few attempts. It could be Direct2D-related issue. I also had to turn that off for Firefox to start working again.