C# - Persist Silverlight MediaElement Playing On Postback
Nov 18, 2010
I am trying to figure out how to persist the playing of a Silverlight MediaElement playing within a Silverlight User Control embedded in an ASP.NET during postback.
The scenario goes:
Have a media player on a site, press play, continue navigating through site while the music continues playing.
What it does right now:
Obviously the object gets loaded anew on each postback or page redirect (even if it's back to the same page IE: default.aspx).
I've seen samples of how to persist the state of a Control on postback and even complex data through cross-page postback. But nothing that covers my specific case.
I am having the hardest time figuring this problem out. I have a Silverlight 4 application that loads audio and video files from URLs. The URLs are the same domain as the application is hosted on and it works great for video.The URLs are actually asp.net mvc controllers that are responsible for reading the file from a shared location on and the server and serving back a filestream. The URLs look something like this:http://localhost:31479/CourseMedia?path=omnisandbox1ILMSShare2Demo-Fire+BehaviormediaDisclaim.wma&encrypted=False&id=00000000-0000-0000-0000-000000000000
If I put the URL directly into the browser the file loads and plays in windows media player just fine, and if I use a separate test silverlight project to load the url it also works, but for the life of me I can not get it to work properly in my main project.This is the routine I use to actually do the source setting:
Also, the data on this page is constantly being updated via an UpdatePanel and a Timer control (being re-databound each time). Every 30 seconds the prices displayed for the various stocks in the repeater control change.
Now, I have a linkbutton that has a click event method in the code-behind that is supposed to export the ~data on the screen~ for the user. I need to grab the current values for the list of stocks last databound to the repeater. I can't simply go grab the latest values from the database because those will have been changed in the time between the last refresh.
protected void lbtnExportStocks_Click(object sender, EventArgs e) { // No longer have the stock data used in the repeater control ExportStocksToExcel(); }
I know that ASP.NET doesn't persist the datasource for the repeater on post-back but I need to still be able to either re-construct this list of Stock entities so I can send them the CSV or I need persist it in some way.
I don't want to do anything that is too heavy handed in terms of performance because during certain days of the week this application can have some heavy usage.
What is the proper solution to this type of situation? Should I iterate through the Repeater's "Items" collection and reconstruct the Stock entities?
I bind textbox to a property of an object. After running the app, if the value of textbox is changed, I expect the object to update this property .This does not happen. I also understand that I am recreating the object from viewstate on postback, which is wrong. how to persist the state of object on postbacks all.
Now I inserted some html content inside this div on some button click(without postback) . Now when I perform a postback on some action say on server control submit button , I want the html(which I inserted via javascript) be persisted in the foo div. Right now I am thinking to take an hidden input server control and when the form will be submitted I will insert the content of foo div in that hidden control, the next time when the page loads after the postback I will fill the foo div with the content inside the hidden field. Am I going with correct approach or is their any other good approach which I should opt ?
i want to hold data at runtimeEx-I have a 3 Services A,B,C and in A,B,C contain services list,then if user select A service and 3 services in a A Listagain user select B service and 2 services in a B Listand again user Select C Service and select 1 services in a C listSo How i can hold data A,B,C services ID'S value with respect to services listID'S value at runtime.
I have a grid view whose 1st column is Image Field. Now I assign 1 out of 4 images to each row at runtime. I have this gridview in ajax updatepanel. Now how can i persist the images in the first column after a postback.
i have created a user control UserControl.ascx, in Code behind file of UserControl.ascx i have created an object of a class MyClass.cs,
Like
if(!Page.IsPostback) { objMyClass= new MyClass(); }
but when i click on button of UserControl.ascx page and try to access objMyClass object then it set as null, so how to persist MyClass object when page PostBack, i wanted to keep object persist till the user access the page, when user goes out of this page then object should distroy?
Im binding the gridview in page load.After i click the link button in the gridview it displays another gridview.I have a checkbox in that gridview.I check some of the checkboxes.while i click the save button i want to get that checkbox state whether its checked or not.Bt for me its showing no records in the grid.How do i persist my data and get the checbox's state.
I have an object to hold some specific state information in my web application - I pass it back & forward between pages by making it a property of a basepage which works fine, but I lose it on postback.
Is there any way to persist this property without manually adding & reading it again from viewstate?
while i change the position continuously MediaElement is getting End. For a example i am playing a 5min file i am changing the position some 20 times forward and backward ,the MediaElement is getting End Automatically.
I have created a really simple custom control to render panels into a page. The code is below. When I use my control and add any webcontrol to it, after each page postback the contents of these child controls vanishes.
I must have missed something really simple but run the example to reproduce this. Can anyone please enlighten me as to why the controls are being 'emptied' of their contents, and how I stop this occuring?
I know silverlight page doesn't make postback itself but does event fired from silverlight control postback whole asp.net page If this silverlight,control embedded in aspx page?
i want a player that can play flv and mp4 videos. i want to embed that player in my website (.net 3.5) i have googled a lot...but not found any....flowplayer is playing all flvs, but supports mp4 partially, some mp4 videos in flowplayer dont show video.
In an ASP.NET environment, what's the best way to play a mp3 file? Do I need to use a flash plugin (some users may not have flash). Also, this needs to work on a IPhone or an IPod.
I have a website built in ASP.NET 2.0 and a Windows Server 2003 server streaming live videos with Windows Media Services.
To play the content i usually embed a Windows Media Player in my page and make it open the publication URL (let's say http://my.server.com/live), and it works fine.
The problem is that when no stream is playing, an empty stopped player appears and i don't like that
So i'd like to check in my (VB) code if there's actually something being streamed BEFORE i open the player, and display a 'no active stream right now, please try later' message instead.
where "file" is a variable which i have delared at Code behind and on one button click i set it with "Video file with path". problem is that, i am not able to play video...
i need to embedd a video player on web form, that will be able to play almost every ormost of the known video/audio formats....(mpeg, flv, avi, 3gpp, wmv, wma)..i need only a single player.....to be embedded....and it shuld not use the pc's local players..
In our application we are playing video, for this we are using frameworke 2.0.Video files are placed in application server.This is working fine in IE and it is not working in firefox.
I'm setting up a website for a friend who wants to showcase their music. At the moment i have about 12 songs all loading at the same time using the <embed> tag. This displays a WMP object on the page for each song and obviously takes forever to load due to the total size of the songs.
I'd like to be able to simply have a link (title of the song) and an image on the side of each song (play button) that can be used to start and stop each song as required.
i have a control that shows me Messages. it sits in an update panel and constantly polls the server for new messages. This is accessed by multiple users.. My problem is that i need to be able to play a sound when new messages are found.. i have been able to "sorta" do this using soundplayer.. every time it polls it is checking timestamps to determine if a message was added in the last x seconds.. if so.. ding.. that works great.. UNTIL you put it out on the server.. from what i gather.. that will only dingat the server.. (great for the server room... not so much for the users).. i have been googling for hours now.. it seems theres 3.4 billion answers for stuff i don't think im looking for.. but i can't seem to find anything that really does this. I need the Code behind to cause the playing of the sound.. and for all users..
I have tried the SoundPlayer class in ASP.NET used to give alert when it reachs threshold (value has been set).
When i directly complied from VS2008 its working mean it gives alert sound. But while i open browser the type "localhost/website/default.aspx" in the address bar its not playing (any sound).
My code is here
SoundPlayer objSoundplayer = new SoundPlayer(path); objSoundplayer.LoadAsync(); objSoundplayer.Play(); objSoundplayer.PlayLooping(); Working with portnumber : localhost:55678/website/default.aspx
Not Working: localhost/website/default.aspx
What worng in this code or need to inculde some more properites.
