I want to clear the Cache of a WebBrowser control dynamically in Windows Phone 7.1 using C#. Previously selected images are loading again in my WebBrowser, has anyone ran into this before?
Clearing Cache in WP7.1 is not possible.
The workaround can be to force the browser to load fresh page each time. This can be accomplished in many ways such as:
- Using False Query i.e. Passing a random parameter in location of web page like /page.html?q=5
- Using tags based methods to prevent caching (google it)
- passing no-cache headers from server itself
On Windows Phone 8 you can use the extension method ClearInternetCacheAsync.
This won't work on WP7.1 however. See another StackOverflow question that deals with that.
For clearing images this code can be helpfull to you.
BitmapImage bitmapImage = image.Source as BitmapImage;
bitmapImage.UriSource = null;
image.Source = null;
This works. happy coding
Related
I'm converting an app to run as a Universal Windows App using VS 2015 Community. If I create a webview using the toolbox, I can enter "http://www.google.com" into the Source property, and it will display google.
If I use the drop down on the Source property to reference (say) Help.htm as a local resource, the source windows displays "ms-appx:///Help.htm". Similarly if it is in Assets, it displays "ms-appx:///Assets/Help.htm". When I run the program, where the webview should appear it displays "You will need a new app to display this ms-appx" and invites me to search the store.
I can display a local image in an image box with very similar syntax, with Source being "ms-appx:///Assets/StoreLogo.png". The Source property in this case is in the "common" group, not "miscellaneous", but apart from that appears virtually identical.
Nor can I specify a local path in a URI (although again I can display Google). Behaviour is identical on two different machines. I have spent several days trying to work out what is going on; any suggestions?
Can you please try to load file through code and share results?
public MainPage()
{
this.InitializeComponent();
mywebview.Source = newUri("ms-appx-web:///Help.htm");
}
also try this
mywebview.Navigate(newUri("ms-appx-web:///Help.htm"));
If both above options doesn't work. Please change to below and share results
mywebview.NavigateToString("<Html><Body><h1>Eureka!!!!<h1><Body></Html>");
If you are using it from a Library project, you must also add the name of the library, like that:
ms-appx-web:///[Library]/Help.htm
I've problem with using BingMapsDirectionsTask on device with Windows Phone 7.8 and set polish language (pl-PL). In my app I'm trying to call:
var bingMapsDirectionsTask = new BingMapsDirectionsTask();
var destination = new LabeledMapLocation(dest.Name, dest.LocationItem);
bingMapsDirectionsTask.End = destination;
bingMapsDirectionsTask.Show();
When I change device location to other culture, for example en-US the same code works correctly, so I can assume that my code is ok.
I've found some info in Internet about similar problems with other non en cultures. The main workaround based on temporary changing application culture info to en-US:
http://www.apeoholic.se/post/How-to-use-BingMapsDirectionsTask.aspx
http://grenangen.se/node/71
Unfortunately this approach doesn't work with set pl-PL main culture on device. Do you have any suggestions how can I resolve this problem and run Bing maps to show direction to my point?
I can confirm the same behavior with el-GR (Greek) device language. Your code is obviously OK. This is a bug of BingMapsDirectionsTask. Unfortunately it is present even if destination is given in GeoLocation form. Currently there seems to be no way of bypassing this bug.
I'm creating a small Windows application (C++) which create some windows an such (CreateWindowEx and the like). And in one window I want to add a control that shows MHTML loaded from memory, i.e. the whole MHTML content is in a string, not in a file.
I already tried the Shell.Explorer component, but I can't find a way to inject to it anything other than HTML (see AtlAxCreateControl).
Is it possible to use the Shell.Explorer component or any other to show in-memory MHTML??
That is, without writing the content to a file and then giving the file path. That works, but it's not optimal and it'll have to be the last alternative if I can't do it any other way.
PS: If this can be done in another language or environment like C#, JS, VBS, WSH, HTAs, I'm all ears as well.
A bit late to answer, but still - there is a way to do it : use Microsoft's WebBrowser control (COM component, can be used in .Net apps as well).
Take a look an what the proposed solutions here - How to load mht from stream/string into a WebBrowser control? and here - How to display the string html contents into webbrowser control?. some of them refer to mhtml content but the solutions are applicable to ordinary html files as well.
Good luck.
I've been working on a Windows Phone 7 app, and after a bit of Googling it seems that for images that I have added to the Visual Studio project, I need to set the build action to "Content" in order to be able to reference the images in my app.
However, the Windows Phone List Application project template includes an image (ArrowImg.png) that has its Build Action set to "Resource", and is still available to be referenced from the application.
I was wondering if anyone could confirm that we should definitely be using the Content build action, or whether there is some way to access images added to a project with the Resource Build Action as shown in the project sample, which we should be using instead?
If you set the action to "Content" the image is included "as-is" in the XAP.
If you set the action to "Resource" the image is embedded into a shared DLL.
In a lot of situations you can use either. There may be a performance, or other, issue with using one rather than another but I'm not aware of and have never noticed any.
For what it's worth, unless I need to specifically make it a resource, I use content.
With the current (Beta) tools, I have seen VS complain that images directly referenced in XAML should be set to "Resource" (if set to "Content") but the app works fine with either. Hopefully this is an issue which will be addressed in the RTM tools.
For more information see the discussion in What are the various "Build action" settings in Visual Studio project properties and what do they do?
Either build action is correct.
Also worth looking at when resolving issues relating to build action is the pathing you use.
I've seen a fair few people running into trouble with this because they assume they've set their build action inappropriately.
You can set the build action either way to suit your requirements of when to incur the load time cost, you just need to adjust the pathing to suit.
Some more info on the topic from this post.
Set source to image in C#
You can liken content to the lazy
loading version of resources.
The difference is you will incur the
performance hit of all resources when
the assemblies are loaded to start
your app.
Content, on the other hand, the
performance hit is deferred to when
you use it.
Which is more suitable will vary on a
case by case basis.
Note also that the pathing to
reference resources and content is
different as can see here.
//Uri uri = new Uri("/Resources/Images/MyImage.jpg", UriKind.Relative); // Content
Uri uri = new Uri("/PhoneApp;component/Resources/Images/MyImage.jpg", UriKind.Relative); // Resource
BitmapImage imgSource = new BitmapImage(uri);
image1.Source = imgSource;
It looks like IE7 doesn't reload the latest version of my stylesheet each time I upload a new version on the server.
This is annoying as I am debugging my .css file to make it work on IE...
Tried to empty the browser cache but still not working.
Thanks for your help.
Ctrl-F5 - forcible way to reload in IE
Include your version number in the file name. myfile_v1234.css
When testing, every time you do an update you can just wite "stylesheet.css?r=98123"
As long as the query string is different, it'll be downloaded again.
If you need, you can use javascript to append Math.random(), to get the random number. Not required on production though, when updates would be stable.
2 Questions:
Does IE eventually load with the newer stylesheet?
How are you saving the changes to the server (SSH, Web Interface, etc.)?
I ask because I ran into an issue with a web-based file management system a while back where one browser would show the CSS just fine, the other wouldn't, and we noticed the issue of which browser played nicely depended on which browser we used to upload the CSS.
The reason turned out to be that IE gave the CSS file a different MIME type than Firefox. If you continue to notice the issue even when you've cleared the cache, check the MIME type of the file using Firefox by going to Tools > Page Info.
Also, if it is simply a caching issue, consider turning caching off in IE. I believe this should be an Advanced Option under Internet Options.
Also, you may want to try creating a special developer environment for IE (if it comes down to it.) Perhaps have another machine with IE7 and no caching and any other features turned off (A kiosk mode, perhaps), and then previewing the page on that machine.
Thanks to you all!
I did manage to solve my problem with the "stupid" Ctrl+F5, and by changing the Internet Parameters of Windows to reload content every new visit.