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  • How do I dinamically load raw assemblies that contains unmanaged code?(bypassing 'Unverifiable code

    - by Thiado de Arruda
    I'm going to give an example of using System.Data.SQLite.DLL which is a mixed assembly with unmanaged code: If I execute this : var assembly= Assembly.LoadFrom("System.Data.SQLite.DLL") No exceptions are thrown, but if I do this : var rawAssembly = File.ReadAllBytes("System.Data.SQLite.DLL"); var assembly = Assembly.Load(rawAssembly); The CLR throws a FileLoadException with "Unverifiable code failed policy check. (Exception from HRESULT: 0x80131402)". Let's say I'm trying to load this assembly on a child AppDomain, how can I customize the AppDomain's security to allow me pass the policy check?

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  • AJAX Partial page update problem when displaying a control

    - by Jernej Goricki
    Hello! I have an interesting problem when using partial page update in asp.net with scriptmanager and a update panel. My scenario looks like this: I'm using the tab control from the ajax toolkit. I also implemented this control using lazy loading, so that when the page is loaded only the current tab gets loaded all the other tabs don't get rendered, because Im using an UpdatePanel (on a .ascx control) on each of these tabs and when a tab gets selected the updatepanel makes a async postback to load the content for a selected tab. On one of my tabs Im using a combobox control from obout.com, and it doesn't work. Now I know why it doesn't work. It doesn't work because the control is shown via a partial page refresh, but to correctly display the control it has to do some "magic" that is - register some .css and .js includes on the page (in the head I guess)....but because I load this control via async page refresh...it can't do these stuff. What kind of workarround do you suggest? Thanks!

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  • Security behaviour in Adobe Air

    - by t.stamm
    Hi everyone! I am trying to load external SWFs in my Adobe AIR App. The loaded SWF is trying to access an URL to retrieve some informations via XML. When starting the SWF by itself it works fine. When loading the SWF from the File.applicationStorageDirectory i will get an Security-Error because the loaded App is executed in a local-with-filesystem Sandbox appareantly. First Question: Is there a way to change this? That the loaded SWF is running in a network Sandbox? Since that first attempt didn't worked i've moved the SWF to the app:// directory. Now i'll get a Security-Error because there is no policy file on the Server available where the XML data should be retrieved. Second Question: Why is the policy file not necessary when running the SWF by itself, but is necessary when trying to load the data from the application Sandbox? What am i doing wrong? Thanks in advance!

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  • Problems refreshing DataGridView after database update in VB.NET

    - by Gbolahan
    Dim myQuery = "UPDATE table1 SET data= CONCAT (data,'" & vbCrLf & "[ " & Date.Now() & " ]" & " " & "[" & getCN() & "]" & " " & txtTelenotes.Text & "[ item1 ]" & "') WHERE id='" & txtID.Text & "'" myCommand.Connection = conn myCommand.CommandText = myQuery myAdapter.SelectCommand = myCommand Dim myData As MySqlDataReader myData = myCommand.ExecuteReader() txtTelenotes.Text = "" dgvREcord.Refresh() I tried refreshing the DataGridView using: dgvREcord.Refresh() but it does not load the changes from the database.

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  • Can I ran 2 or more Tcp Sever applications on one computer?

    - by Samvel Siradeghyan
    Hi all. I have a client-server Silverlight application, which is use Socets. I have server appliaction on may computer(Win Form application) and client applucation as web site(Silverlight application). I use policy server which open port 943. Everything works fine on this application. But now I need to write another client-server application. Server for that application olso use port 943 for policy connection. When I try to run this 2 server applications on the same compyeter an excepten is thrown which says that only one application can work on port 943. How can I solve this problem? Thanks.

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  • Visual Studio DataSet Designer keep queries

    - by LnDCobra
    In visual studio datasource designer(The screen where you have all the UML Diagrams including relations) is there any way to refresh a table and its relations/foreign key constraints without refreshing the whole table? The way I am doing it at the moment is removing the table and adding it again. This adds all the relations and refreshes all fields. Also if I change a fields data type, is there a way to automatically refresh all the fields in the datasource? Again without deleting the table and adding it again. Reason for this is because some of my TableAdapters have quite a number of complex queries attached to them and when I remove the table the adapter gets removed as well including all its queries. I am using Visual Studio 2008 and connecting to a MySQL database.

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  • Determine the 'Overtype' mode using Javascript

    - by Snorkpete
    We are creating a web app to replace an old-school green-screen application. In the green-screen app, as the user presses the Insert key to switch between overtype and insert modes, the cursor changes to indicate which input mode the user is currently in. In IE (which is the official browser of the company), overtype mode also works, but there's no visual indication as to whether overtype mode is on or not, until the user starts typing and possibly over-writes existing information unexpectedly. I'd like to put some sort of visual indicator on the screen if in overtype mode. How can you determine if the browser is in 'overtype mode' from Javascript? Is there some property or function i can query to determine if the browser is in overtype mode? Even an IE-specific solution would be helpful, since our corporate policy dictates the browser to use as IE7 (pure torture, btw). (I do know that one solution is to do check for key presses of the Insert key. However, it's a solution that I'd prefer to avoid since that method seems a bit flaky & error-prone because I can't guarantee what mode the user would be in BEFORE he/she hits my page. ) The reasoning behind this question: The functionality of this portion of the green-screen app is such that the user can select from a list of 'preformatted bodies of text'. crude eg. The excess for this policy is: $xxxxxx and max limit is:$xxxxxx Date of policy is: xx/xx/xxxx and expires : xx/xx/xxxx Some other irrelevant text After selecting this 'preformatted text', the user would then use overtype to replace the x's with actual values, without disturbing the alignment of the rest of the text. (To be clear, they can still edit any part of the 'preformatted text' if they so wished. It's just that usually, they just wish to replace specific portions of the text. Keeping the alignment is important since these sections of text can end up on printed documents.) Of course, the same effect can be achieved by just selecting the x's to replace first, but it would be helpful (with respect to easing the transition to the web app) to allow old methods of doing things to continue to work, while still allowing 'web methods' to be used by the more tech-savvy users. Essentially, we're trying to make the initial transition from the green-screen app to the web app be as seemless as possible to minimise the resistance from the long-time green-screeners.

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  • UpdateProgress with UpdatePanel not showing up in User control when page is loading

    - by Carter
    Is this typical behavior of the UpdateProgress for an ASP.Net UpdatePanel? I have an update panel with the UpdateProgress control inside of a user control window on a page. If I then make the page in the background do some loading and click a button in the user control update panel the UpdateProgress does not show up at all. It's like the UpdatePanels refresh request is not even registered until after the actual page is done doing it's business. It's worth noting that it will show up if nothing is happening in the background. The functionality I want is what you would expect. I want to loader to show up if it has to wait for anything to get it's refresh done when after the button is clicked. I know I can get this functionality if I just use jquery ajax with a static web method, but you can't have static web methods inside of a user control. I could have it in the page but it really doesn't belong there. A full-blown wcf wouldn't really be worth it in this case either. I'm trying to compromise with an UpdatePanel but these things always seem to cause me some kind of trouble. Maybe this is just the way it works? Edit:So I'll clarify a bit what I'm doing. What's happening is I have a page and all it has on it are some tools on the side and a big map. When the page initially loads it takes some time to load the map. Now if while it's loading I open up the tool (a user control) that has the update panel in question in it and click the button on this user control that should refresh the update panel with new data and show the loading sign (in the updateprogress) then the UpdateProgress loading image does not show up. However, the code run by the button click does run after the page is done loading (as expected) and The UpdateProgress will show up if nothing on the page containing the user control is loading. I just want the loader to show up while the page is loading. I thought my problem was that perhaps the map loading is in an update panel and my UpdateProgress was only being associated with the update panel for the user control's update panel. Hence, I would get no loading icon when the map was loading. This is not the case though.

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  • JQuery Passing Variable From href to load()

    - by dvancouver
    I am trying to pass an href id to load() in JQuery, I can see from the alert the returned id# 960, so I know the id value is getting past I just don't know how to append the load url, well the $("#refreshme_"+add_id) is the important part, I use that to refresh the unique div id in the page assigned by the database pull, so it would be looking for id="refreshme_960". My simple example that is obviously not working. I want to refresh the db select part of the page showing the new list of cars. Any ideas? $(document).ready(function() { $(".add_to_favorites").livequery("click", function(event) { var add_id = this.id.replace("add_", ""); //taken from a.href tag alert (id); $.get(this.href, function(data) { $("#refreshme_"+add_id).load("http://www.example.com/car_list/"+add_id); <a class="add_to_cars" href="/car-add/960/add'}" id="add_960">Add Car</a>

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  • Resetting or refreshing a database connection

    - by cdonner
    This Android application on Google uses the following method to refresh the database after replacing the database file with a backup: public void resetDbConnection() { this.cleanup(); this.db = SQLiteDatabase.openDatabase( "/data/data/com.totsp.bookworm/databases/bookworm.db", null, SQLiteDatabase.OPEN_READWRITE); } I did not build this app, and I am not sure what happens. I am trying to make this idea work in my own application, but the data appears to be cached by the views, and the app continues to show data from the database that was replaced, even after I call cleanup() and reopen the database. I have to terminate and restart the activity in order to see the new data. I tried to call invalidate on my TabHost view, which pretty much contains everything. I thought that the views would redraw and refresh their underlying data, but this did also not have the expected result. I ended up restarting the activity programmatically, which works, but this seems to be a drastic measure. Is there a better way?

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  • Visual Studio Web Application edit source while running like in Tomcat\Eclipse\Java

    - by Bryan Migliorisi
    In an ASP.NET Web Site project, I've always been able to make changes to the underlying C# code and simply refresh the page in the browser and my changes would be there instantly. I can do the same thing when working with Java and Eclipse - edit my Java source and refresh the page and my changes are there. I cannot do this in ASP.NET MVC though and it is a real downer - I have to stop the running process and make my changes, and then restart debugging. This is a huge waste of time. Am I doing it wrong? What is the best approach to ASP.NET MVC development?

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  • Create signed urls for CloudFront with Ruby

    - by wiseleyb
    History: I created a key and pem file on Amazon. I created a private bucket I created a public distribution and used origin id to connect to the private bucket: works I created a private distribution and connected it the same as #3 - now I get access denied: expected I'm having a really hard time generating a url that will work. I've been trying to follow the directions described here: http://docs.amazonwebservices.com/AmazonCloudFront/latest/DeveloperGuide/index.html?PrivateContent.html This is what I've got so far... doesn't work though - still getting access denied: def url_safe(s) s.gsub('+','-').gsub('=','_').gsub('/','~').gsub(/\n/,'').gsub(' ','') end def policy_for_resource(resource, expires = Time.now + 1.hour) %({"Statement":[{"Resource":"#{resource}","Condition":{"DateLessThan":{"AWS:EpochTime":#{expires.to_i}}}}]}) end def signature_for_resource(resource, key_id, private_key_file_name, expires = Time.now + 1.hour) policy = url_safe(policy_for_resource(resource, expires)) key = OpenSSL::PKey::RSA.new(File.readlines(private_key_file_name).join("")) url_safe(Base64.encode64(key.sign(OpenSSL::Digest::SHA1.new, (policy)))) end def expiring_url_for_private_resource(resource, key_id, private_key_file_name, expires = Time.now + 1.hour) sig = signature_for_resource(resource, key_id, private_key_file_name, expires) "#{resource}?Expires=#{expires.to_i}&Signature=#{sig}&Key-Pair-Id=#{key_id}" end resource = "http://d27ss180g8tp83.cloudfront.net/iwantu.jpeg" key_id = "APKAIS6OBYQ253QOURZA" pk_file = "doc/pk-APKAIS6OBYQ253QOURZA.pem" puts expiring_url_for_private_resource(resource, key_id, pk_file) Can anyone tell me what I'm doing wrong here?

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  • PHP and ajax no update taking place

    - by sea_1987
    Hi There, I have an an ajax request that looks like this, $('input.fakecheck').click(function(){ alert("deleteing...."); $.ajax({ url:"/search", type:"POST", data: $(this).attr('name')+"="+$(this).attr('value')+"&remove=Remove", success:function() { alert(data); } }) }) This calls a php function which looks like this, private function _remove_from_short_list($cv_array) { if (is_array($cv_array)) { $short_list = $this->session->userdata('short_list'); $new_list = array_diff_key($short_list, $cv_array); $this->session->set_userdata('short_list', $new_list); } } Essentiallty what happens is that on my page I have a list which is essentially a list of id's taken out of the session, the user can then by click and input(this will change) delete the id from their session. However once the deletion has taken place I want to be able to refresh the list to show that it has taken place, currently nothing happens, until I manually refresh.

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  • Creating a dynamic (video) Overlay on Google Maps on Android 2.1

    - by Soumya
    I'm trying to create a map overlay for displaying a video stream (MJPEG) on top of a Mapview. Currently I've a standalone activity that creates a data thread for fetching MJPEG video frames. I'm using a handler to send a frame (as a Bitmap) from the data thread to the main activity which then updates the UI. I'm not sure how I can implement "refresh" for updating my "overlayed" video stream. EDIT: What I mean by "refresh" is - how can I update the video portion (not the mapview) of my UI whenever I get a new video frame. I plan to paint the video frame (bitmap) in the "draw method" of my implementation of the Overlay subclass. But the "draw" method is not invoked by me directly. Thanks.

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  • UILabel background color not updating in UITableView

    - by Joey
    I'm having a perplexing problem with a simple UILabel I put on a cell in a UITableView. I enter a separate view after tapping on a row, like many UITableViews. In there, I update the cell so that when I return to the rows, it should be updated, with this: MyTableViewCell* cell = (MyTableViewCell*) [mTableView cellForRowAtIndexPath: [NSIndexPath indexPathForRow:mActiveRow inSection:0]]; cell.myLabel.text = @"New Value"; // updated text cell.myLabel.backgroundColor = [UIColor greenColor]; // updated color When I return, though, only the text is updated, not the color. When I scroll the row off the screen and return it refreshes properly via another path of code that has exactly the same code. Could there be some trigger to refresh specifically the background color of the UILabel? I'm not sure why the text will refresh but the color won't.

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  • C#: BackgroundWorker cloning resources?

    - by Dav
    The problem I've been struggling with this partiular problem for two days now and just run out of ideas. A little... background: we have a WinForms app that needs to access a database, construct a list of related in-memory objects from that data, and then display on a DataGridView. Important point is that we first populate an app-wide cache (List), and then create a mirror of the cache local to the form on which the DGV lives (using List constructor param). Because fetching the data takes a good few seconds (DB sits on a LAN server) to load, we decided to use a BackgroundWorker, and only refresh the DGV once the data is loaded. However, it seems that doing the loading via a BGW results in some memory leak... or an error on my part. When loaded using a blocking method call, the app consumes about 30MB of RAM; with a BGW this jumps to 80MB! While it may not seem as much anyway, our clients are not too happy about it. Relevant code Form private void MyForm_Load(object sender, EventArgs e) { MyRepository.Instance.FinishedEvent += RefreshCache; } private void RefreshCache(object sender, EventArgs e) { dgvProducts.DataSource = new List<MyDataObj>(MyRepository.Products); } Repository private static List<MyDataObj> Products { get; set; } public event EventHandler ProductsLoaded; public void GetProductsSync() { List<MyDataObj> p; using (MyL2SDb db = new MyL2SDb(MyConfig.ConnectionString)) { p = db.PRODUCTS .Select(p => new MyDataObj {Id = p.ID, Description = p.DESCR}) .ToList(); } Products = p; // tell the form to refresh UI if (ProductsLoaded != null) ProductsLoaded(this, null); } public void GetProductsAsync() { using (BackgroundWorker myWorker = new BackgroundWorker()) { myWorker.DoWork += delegate { List<MyDataObj> p; using (MyL2SDb db = new MyL2SDb(MyConfig.ConnectionString)) { p = db.PRODUCTS .Select(p => new MyDataObj {Id = p.ID, Description = p.DESCR}) .ToList(); } Products = p; }; // tell the form to refresh UI when finished myWorker.RunWorkerCompleted += GetProductsCompleted; myWorker.RunWorkerAsync(); } } private void GetProductsCompleted(object sender, RunWorkerCompletedEventArgs e) { if (ProductsLoaded != null) ProductsLoaded(this, null); } End! GetProductsSync or GetProductsAsync are called on the main thread, not shown above. Could it be that the GarbageCollector just gets lost with two threads? Or is it the task manager that shows incorrect values? Will be greateful for any responses, suggestions, criticism.

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  • Reset Java Applet on page reload

    - by tommy-susanto
    I need to quit firefox and restart it in order for the applet to be refreshed... its anoying since i'm still programming it an the class files changes... am i missing some codes which makes it unable to refresh the applet and still take the one from the cache??? So I have a .jar applet in my website, a simulation game that spawns army whenever user clicks on the screen... however whenever I refresh the page, the previous army are still there on the screen.. I want it to be refreshed (as if we're just starting to run the application the first time). I already tried pressing CTRL+f5 but the trick doesn't seem to work I'd basically like to do it automatically using scripts or something, so that it won't require user to manually press some button on the keyboard Any Suggestions? I'd really appreciate it Thank you....

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  • Stop a postback in javascript

    - by jmpena
    hello, i have an ASP webform with a JQuery Thickbox, i have an image that opens the thickbox when user click. once open the thickbox it shows me a grid with several rows and a button to select one and after the user select the record it returns to the main page the recordselected and cause a __doPostBack() BUT! sometimes in IE6 it stay loading the postback and never ends i have to refresh the page and when it refresh it shows everything fine. but i dont want the postback stay loading AND it does not happend always. i have to call a __doPostBack because i need to find info related to the selected record. thanks.

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  • Neglect empty cells while refreshing

    - by Ashok Vardhan
    I have an excel macro which refreshes the worksheet. However, if the file (in .csv format) with which the worksheet is being refreshed has empty cells, it's shifting the data from other columns and placing the data in wrong columns. However,if I manually refresh the sheet, it's working fine. I don't know how I can fix this. I just want my whole .csv file including empty cells to appear as it is in the worksheet. Any suggestions would be greatly helpful. The following is the Macro code. With Worksheets("RawData1").QueryTables(1) .TextFilePromptOnRefresh = False .RefreshStyle = xlinsertdelete .Connection = Application.Substitute(.Connection, CurrPath, NewPath) .Refresh End With // We can assume that we have CurrPath and NewPath properly

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  • Configuring the expiry time for the messages destined to the "Expired message address" in Hornetq

    - by Rohit
    I have configured a message expiry destination in Hornetq as below <address-setting match="#"> <dead-letter-address>jms.queue.error</dead-letter-address> <expiry-address>jms.queue.error</expiry-address> <max-delivery-attempts>3</max-delivery-attempts> <redelivery-delay>2000</redelivery-delay> <max-size-bytes>10485760</max-size-bytes> <message-counter-history-day-limit>10</message-counter-history-day-limit> <address-full-policy>BLOCK</address-full-policy> <redistribution-delay>60000</redistribution-delay> </address-setting> And the messages do get redirected to the expiry address once the expiration time is exceeded. These messages live indefinitely on the expiry address, Is there a way to provide a expiry time for these messages so they live only limited time on the expiry address?

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  • Anyone up to creating a tomcat based alternative for GAE?

    - by bach
    Hi, If we had the possibility to run GAE app without any code change on our servlet engine that would be great because: in case that google changes their billing policy we can just jump to our own server or in case their current policy doesn't fit our app needs we can do stuff which is not allowed in the GAE, compromising a 1 JVM, 1 DB We don't actually need a distributed system but more of a realtime system with synchronize, true locking mechanisms, other servers/software installed on the server machine, socket interface etc... Such a package should include at least: TomCat (or equivalent) DataNucleus Access Platform (Task Queue service) Any idea if it's easy to get such a thing or if it's already exist somewhere? Thanks

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  • JavaScript: What would cause setInterval to stop firing?

    - by Rosarch
    I am writing a chat AJAX app. Randomly, in FF 3.5.9, setInterval() seems to stop firing. I don't have clearInterval() anywhere in my code. What could be causing this to happen? $(document).ready(function () { $("#no-js-warning").empty(); messageRefresher = new MessageRefresher(0); setInterval($.proxy(messageRefresher, "refresh"), 2000); }); function notifyInRoom(user) { $.getJSON('API/users_in_room', { room_id: $.getUrlVar('key'), username: user }, function (users) { if (!$.isEmptyObject(users)) { $("#users").empty(); $.each(users, function (index, username) { var newChild = sprintf("<li>%s</li>", username); $("#users").append(newChild); }); } else { $("#users-loading-msg").text("No one is in this room."); } }); } function MessageRefresher(latest_mid) { this._latest_mid = latest_mid; } MessageRefresher.prototype.refresh = function () { notifyInRoom($("#user-name").val()); var refresher = this; $.getJSON('API/read_messages', { room_id: $.getUrlVar('key'), mid: refresher._latest_mid }, function (messages) { if (! (messages == null || $.isEmptyObject(messages[0]))) { // messages will always be at least [[], [], 0] $("#messages-loading-msg").hide(); for (var i = 0; i < messages[0].length; i++) { var newChild = sprintf('<li><span class="username">%s:</span> %s</li>', messages[1][i], messages[0][i]); $("#messages").append(newChild); } refresher._latest_mid = messages[2]; setUserBlockClass(); } else { $("#messages-loading-msg").text("No messages here. Say anything..."); } }); } // Give the end-user-block class to the appropriate messages // eg, those where the next message is by a different user function setUserBlockClass() { $("#messages li").each(function (index) { if ($(this).children(".username").text() != $(this).next().children(".username").text()) { $(this).addClass("end-user-block"); } }); } I checked the most recent responses in Firebug, and it was the same responses that had been sent earlier. (So, it's not like an unusual response caused a crash.) If I refresh the page, the calls resume.

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  • problem with custom NSProtocol and caching on iPhone

    - by TomSwift
    My iPhone app embeds a UIWebView which loads html via a custom NSProtocol handler I have registered. My problem is that resources referenced in the returned html, which are also loaded via my custom protocol handler, are cached and never reloaded. In particular, my stylesheet is cached: <link rel="stylesheet" type="text/css" href="./styles.css" /> The initial request to load the html in the UIWebView looks like this: NSString* strUrl = [NSMutableString stringWithFormat: @"myprotocol:///entry?id=%d", entryID ]; NSURL* url = [NSURL URLWithString: strUrl]; [_pCurrentWebView loadRequest: [NSURLRequest requestWithURL: url cachePolicy: NSURLRequestReloadIgnoringLocalCacheData timeoutInterval: 60 ]]; (note the cache policy is set to ignore, and I've verified this cache policy carries through to subsequent requests for page resources on the initial load) The protocol handler loads the html from a database and returns it to the client using code like this: // create the response record NSURLResponse *response = [[NSURLResponse alloc] initWithURL: [request URL] MIMEType: mimeType expectedContentLength: -1 textEncodingName: textEncodingName]; // get a reference to the client so we can hand off the data id client = [self client]; // turn off caching for this response data [client URLProtocol: self didReceiveResponse:response cacheStoragePolicy: NSURLCacheStorageNotAllowed]; // set the data in the response to our jfif data [client URLProtocol: self didLoadData:data]; [data release]; (Note the response cache policy is "not allowed"). Any ideas how I can make it NOT cache my styles.css resource? I need to be able to dynamically alter the content of this resource on subsequent loads of html that references this file. I thought clearing the shared url cache would work, but it doesnt: [[NSURLCache sharedURLCache] removeAllCachedResponses]; One thing that does work, but it's terribly inefficient, is to dynamically cache-bust the url for the stylesheet by adding a timestamp parameter: <link rel="stylesheet" type="text/css" href="./styles.css?ts=1234567890" /> To make this work I have to load my html from the db, search and replace the url for the stylesheet with a cache-busting parameter that changes on each request. I'd rather not do this. My presumption is that there is no problem if I were to load my content via the built-in HTTP protocol. In that case, I'm guessing that the UIWebView looks at any Cache-Control flags in the NSURLHTTPResponse object's http headers and abides by them. Since my NSURLResponseObject has no http headers (it's not http...) then perhaps UIWebView just decides to cached the resource (ignoring the NSURLRequest caching directive?). Ideas???

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  • Materialized Query Table in SQL Server 2005

    - by Azho KG
    In DB2 there is a support for Materialized Query Table (MQT). Basicly you write a query and create a MQT. But the difference from View is that the query is pre-executed and resulting data is stored in MQT and there are some options when to refresh/syncronize the MQT with base tables. I want same functionality in SQL Server. Is there a way to achieve same result? I've tables with millions of rows, and I want to show summary (like total # of members, total expense and etc) in dashboard. So I don't want to count every time user gets to dashboard, instead I want to store them in table and I want that table to be refresh each night. Any kind of hints, answers,suggestions and ideas are welcome. Thanks.

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  • Can't find method in the activity

    - by Synesso
    I'm starting with Scala + Android. I'm trying to wire a button action to a button without the activity implementing View.OnClickListener. The button click fails at runtime because the method cannot be found. The document I'm working through says that I need only declare a public void method taking a View on the action, and use that method name in the layout. What have I done wrong? MainActivity.scala package net.badgerhunt.hwa import android.app.Activity import android.os.Bundle import android.widget.Button import android.view.View import java.util.Date class MainActivity extends Activity { override def onCreate(savedInstanceState: Bundle) = { super.onCreate(savedInstanceState) setContentView(R.layout.main) } def calculate(button: View): Unit = println("calculating with %s ...".format(button)) } res/layout/main.xml <?xml version="1.0" encoding="utf-8"?> <Button xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/button" android:text="" android:onClick="calculate" android:layout_width="fill_parent" android:layout_height="fill_parent"/> the failure onclick D/AndroidRuntime( 362): Shutting down VM W/dalvikvm( 362): threadid=3: thread exiting with uncaught exception (group=0x4001b188) E/AndroidRuntime( 362): Uncaught handler: thread main exiting due to uncaught exception E/AndroidRuntime( 362): java.lang.IllegalStateException: Could not find a method calculate(View) in the activity E/AndroidRuntime( 362): at android.view.View$1.onClick(View.java:2020) E/AndroidRuntime( 362): at android.view.View.performClick(View.java:2364) E/AndroidRuntime( 362): at android.view.View.onTouchEvent(View.java:4179) E/AndroidRuntime( 362): at android.widget.TextView.onTouchEvent(TextView.java:6540) E/AndroidRuntime( 362): at android.view.View.dispatchTouchEvent(View.java:3709) E/AndroidRuntime( 362): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) E/AndroidRuntime( 362): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) E/AndroidRuntime( 362): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884) E/AndroidRuntime( 362): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659) E/AndroidRuntime( 362): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) E/AndroidRuntime( 362): at android.app.Activity.dispatchTouchEvent(Activity.java:2061) E/AndroidRuntime( 362): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643) E/AndroidRuntime( 362): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691) E/AndroidRuntime( 362): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime( 362): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime( 362): at android.app.ActivityThread.main(ActivityThread.java:4363) E/AndroidRuntime( 362): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 362): at java.lang.reflect.Method.invoke(Method.java:521) E/AndroidRuntime( 362): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) E/AndroidRuntime( 362): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) E/AndroidRuntime( 362): at dalvik.system.NativeStart.main(Native Method) E/AndroidRuntime( 362): Caused by: java.lang.NoSuchMethodException: calculate E/AndroidRuntime( 362): at java.lang.ClassCache.findMethodByName(ClassCache.java:308) E/AndroidRuntime( 362): at java.lang.Class.getMethod(Class.java:1014) E/AndroidRuntime( 362): at android.view.View$1.onClick(View.java:2017) E/AndroidRuntime( 362): ... 20 more

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