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  • Pass object to dynamically loaded ListView ItemTemplate

    - by mickyjtwin
    I have been following the following post on using multiple ItemTemplates in a ListView control. While following this example does produce output, I am trying ot figure out how to psas an object through to the ItemTemplate's user control, which I do not seem to be able to do/figure out. protected void lvwComments_OnItemCreated(object sender, ListViewItemEventArgs e) { ListViewDataItem currentItem = (e.Item as ListViewDataItem); Comment comment = (Comment)currentItem.DataItem; if (comment == null) return; string controlPath = string.Empty; switch (comment.Type) { case CommentType.User: controlPath = "~/layouts/controls/General Comment.ascx"; break; case CommentType.Official: controlPath = "~/layouts/controls/Official Comment.ascx"; break; } lvwComments.ItemTemplate = LoadTemplate(Controlpath); } The User Control is as follows: public partial class OfficialComment : UserControl { protected void Page_Load(object sender, EventArgs e) { } } In the example, the values are being output in the ascx page: <%# Eval("ItemName") %> however I need to access the ListItem in this control to do other logic. I cannot figure out how I to send through my Comment item. The sender object and EventArgs do not contain the info.

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  • codingBat repeatEnd using regex

    - by polygenelubricants
    I'm trying to understand regex as much as I can, so I came up with this regex-based solution to codingbat.com repeatEnd: Given a string and an int N, return a string made of N repetitions of the last N characters of the string. You may assume that N is between 0 and the length of the string, inclusive. public String repeatEnd(String str, int N) { return str.replaceAll( ".(?!.{N})(?=.*(?<=(.{N})))|." .replace("N", Integer.toString(N)), "$1" ); } Explanation on its parts: .(?!.{N}): asserts that the matched character is one of the last N characters, by making sure that there aren't N characters following it. (?=.*(?<=(.{N}))): in which case, use lookforward to first go all the way to the end of the string, then a nested lookbehind to capture the last N characters into \1. Note that this assertion will always be true. |.: if the first assertion failed (i.e. there are at least N characters ahead) then match the character anyway; \1 would be empty. In either case, a character is always matched; replace it with \1. My questions are: Is this technique of nested assertions valid? (i.e. looking behind during a lookahead?) Is there a simpler regex-based solution?

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  • Is this an acceptable UI design decision?

    - by DVK
    OK, while I'm on record as stating that StackExchange UI is pretty much one of the best websites and overall GUIs that I have ever seen as far as usability goes, there's one particular aspect of the trilogy that bugs me. For an example, head on to http://meta.stackoverflow.com . Look at the banner on top (the one that says "reminder -- it's April Fool's Day depending on your time zone!"). Personally, I feel that this is a "make the user do the figuring out work" anti-pattern (whatever it's officially called) - namely, instead of making your app smart enough to only present a certain mode of operations in the conditions when that mode is appropriate, you simply turn on the mode full on and put an explanation to the user of why the mode is on when it should not be (in this particular example, the mode is of course displaying the unicorn gravatars starting with 00:00 in the first timezone, despite the fact that some users still live in March 31st). The Great Recalc was also handled the same way - instead of proactively telling the user "your rep was changed from X to Y" the same nearly invisible banner was displayed on meta. So, the questions are: Is there such an official anti-pattern, and if so,m what the heck do i call it? Do you have any other well-known examples of such design anti-pattern? How would you fix either the SO example I made or you your own example? Is there a pattern of fixing or must it be a case-by-case solution?

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  • Sample uniformly at random from an n-dimensional unit simplex.

    - by dreeves
    Sampling uniformly at random from an n-dimensional unit simplex is the fancy way to say that you want n random numbers such that they are all non-negative, they sum to one, and every possible vector of n non-negative numbers that sum to one are equally likely. In the n=2 case you want to sample uniformly from the segment of the line x+y=1 (ie, y=1-x) that is in the positive quadrant. In the n=3 case you're sampling from the triangle-shaped part of the plane x+y+z=1 that is in the positive octant of R3: (Image from http://en.wikipedia.org/wiki/Simplex.) Note that picking n uniform random numbers and then normalizing them so they sum to one does not work. You end up with a bias towards less extreme numbers. Similarly, picking n-1 uniform random numbers and then taking the nth to be one minus the sum of them also introduces bias. Wikipedia gives two algorithms to do this correctly: http://en.wikipedia.org/wiki/Simplex#Random_sampling (Though the second one currently claims to only be correct in practice, not in theory. I'm hoping to clean that up or clarify it when I understand this better. I initially stuck in a "WARNING: such-and-such paper claims the following is wrong" on that Wikipedia page and someone else turned it into the "works only in practice" caveat.) Finally, the question: What do you consider the best implementation of simplex sampling in Mathematica (preferably with empirical confirmation that it's correct)? Related questions http://stackoverflow.com/questions/2171074/generating-a-probability-distribution http://stackoverflow.com/questions/3007975/java-random-percentages

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  • Best practise to send mass email within application (ASP.NET MVC 2, C#)?

    - by gurdan
    Whats the best way to implement mass email sending feature within web app? Two major cases: Email messages for separate registered users depending on their activities (just sending short reminders to user for ex about new posts in his created topic) "Send email for all registered users" functionality, it will be nice to have feature for system administrator to send some messages for all registered users. Of course adding all emails to recipient isn't the way we can go, because email addresses for each user are anonimous. As i understand for case nr1 there is no problem just create some email message via System.Net.Mail by creating new mail message and sending it... but what about case nr 2??? i guess smth like this: foreach(var emailAddress in emailAddresses) { MailMessage mail = new MailMessage(); mail.From = new MailAddress("[email protected]"); mail.To.Add(emailAddress); mail.Subject = "test"; mail.Body = "test"; SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587); smtp.Send(mail); } isn't the good way :) so the question is what is the best way to achieve this ? btw we have no possiblity to deploy some serive for email sending, this should be integrated into web application.

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  • How do I fix: InvalidOperationException upon Session timeout in Ajax WebService call

    - by Ngm
    Hi All, We are invoking Asp.Net ajax web service from the client side. So the JavaScript functions have calls like: // The function to alter the server side state object and set the selected node for the case tree. function JSMethod(caseId, url) { Sample.XYZ.Method(param1, param2, OnMethodReturn); } function OnMethodReturn(result) { var sessionExpiry = CheckForSessionExpiry(result); var error = CheckForErrors(result); ... process result } And on the server side in the ".asmx.cs" file: namespace Sample [ScriptService] class XYZ : WebService { [WebMethod(EnableSession = true)] public string Method(string param1, string param2) { if (SessionExpired()) { return sessionExpiredMessage; } . . . } } The website is setup to use form based authentication. Now if the session has expired and then the JavaScript function "JSMethod" is invoked, then the following error is obtained: Microsoft JScript runtime error: Sys.Net.WebServiceFailedException: The server method 'Method' failed with the following error: System.InvalidOperationException-- Authentication failed. This exception is raised by method "function Sys$Net$WebServiceProxy$invoke" in file "ScriptResource.axd": function Sys$Net$WebServiceProxy$invoke { . . . { // In debug mode, if no error was registered, display some trace information var error; if (result && errorObj) { // If we got a result, we're likely dealing with an error in the method itself error = result.get_exceptionType() + "-- " + result.get_message(); } else { // Otherwise, it's probably a 'top-level' error, in which case we dump the // whole response in the trace error = response.get_responseData(); } // DevDiv 89485: throw, not alert() throw Sys.Net.WebServiceProxy._createFailedError(methodName, String.format(Sys.Res.webServiceFailed, methodName, error)); } So the problem is that the exception is raised even before "Method" is invoked, the exception occurs during the creation of the Web Proxy. Any ideas on how to resolve this problem

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  • Delphi: How to respond to WM_SettingChange/WM_WinIniChange?

    - by Ian Boyd
    i need to know when my application recieves a WM_SETTINGCHANGE message (formerly known as WM_WININICHANGE). Problem is that the message pump in TApplication sends it down a black hole (default handler) before i can get a chance to see it: procedure TApplication.WndProc(var Message: TMessage); ... begin Message.Result := 0; for I := 0 to FWindowHooks.Count - 1 do if TWindowHook(FWindowHooks[I]^)(Message) then Exit; CheckIniChange(Message); with Message do case Msg of WM_SETTINGCHANGE: begin Mouse.SettingChanged(wParam); Default; <----------------------*poof* down the sink hole end; ... end; ... end; The procedure CheckIniChange() doesn't throw any event i can handle, neither does Mouse.SettingChanged(). And once the code path reaches Default, it is sent down the DefWindowProc drain hole, never to be seen again (since the first thing the WndProc does is set the Message.Result to zero. i was hoping to assign a handler to a TApplicationEvents.OnMessage event: procedure TdmGlobal.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean); begin case Msg.message of WM_SETTINGCHANGE: begin // Code end; end; end; But the OnMessage event is only thrown for messages that come through the message pump. Since the WM_SETTINGCHANGE message is "handled", it never sees the PeekMessage TranslateMessage DispatchMessage system. How can i respond to the windows broadcast WM_SETTINGCHANGE?

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  • How do I shrink a matrix using an array mask in MATLAB?

    - by Pyrolistical
    This seems to be a very common problem of mine: data = [1 2 3; 4 5 6]; mask = [true false true]; mask = repmat(mask, 2, 1); data(mask) ==> [1; 4; 3; 6] What I wanted was [1 3; 4 6]. Yes I can just reshape it to the right size, but that seems the wrong way to do it. Is there a better way? Why doesn't data(mask) return a matrix when it is actually rectangular? I understand in the general case it may not be, but in my case since my original mask is an array it always will be. Corollary Thanks for the answer, I just also wanted to point out this also works with anything that returns a numeric index like ismember, sort, or unique. I used to take the second return value from sort and apply it to every column manually when you can use this notion to do it one shot.

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  • iteration in latex

    - by Tim
    Hi, I would like to use some iteration control flow to simplify the following latex code \begin{sidewaystable} \caption{A glance of images} \centering \begin{tabular}{| c ||c| c| c |c| c|| c |c| c|c|c| } \hline \backslashbox{Theme}{Class} &\multicolumn{5}{|c|}{Class 0} & \multicolumn{5}{|c|}{Class 1} \\ \hline \hline 1 & \includegraphics[scale=2]{../../results/1/0_1.eps} &\includegraphics[scale=2]{../../results/1/0_2.eps} &\includegraphics[scale=2]{../../results/1/0_3.eps} &\includegraphics[scale=2]{../../results/1/0_4.eps} &\includegraphics[scale=2]{../../results/1/0_5.eps} &\includegraphics[scale=2]{../../results/1/1_1.eps} &\includegraphics[scale=2]{../../results/1/1_2.eps} &\includegraphics[scale=2]{../../results/1/1_3.eps} &\includegraphics[scale=2]{../../results/1/1_4.eps} &\includegraphics[scale=2]{../../results/1/1_5.eps} \\ \hline \hline 2 & \includegraphics[scale=2]{../../results/2/0_1.eps} &\includegraphics[scale=2]{../../results/2/0_2.eps} &\includegraphics[scale=2]{../../results/2/0_3.eps} &\includegraphics[scale=2]{../../results/2/0_4.eps} &\includegraphics[scale=2]{../../results/2/0_5.eps} &\includegraphics[scale=2]{../../results/2/1_1.eps} &\includegraphics[scale=2]{../../results/2/1_2.eps} &\includegraphics[scale=2]{../../results/2/1_3.eps} &\includegraphics[scale=2]{../../results/2/1_4.eps} &\includegraphics[scale=2]{../../results/2/1_5.eps} \\ \hline ... % similarly for 3, 4, ..., 22 \hline 23 & \includegraphics[scale=2]{../../results/23/0_1.eps} &\includegraphics[scale=2]{../../results/23/0_2.eps} &\includegraphics[scale=2]{../../results/23/0_3.eps} &\includegraphics[scale=2]{../../results/23/0_4.eps} &\includegraphics[scale=2]{../../results/23/0_5.eps} &\includegraphics[scale=2]{../../results/23/1_1.eps} &\includegraphics[scale=2]{../../results/23/1_2.eps} &\includegraphics[scale=2]{../../results/23/1_3.eps} &\includegraphics[scale=2]{../../results/23/1_4.eps} &\includegraphics[scale=2]{../../results/23/1_5.eps} \\ \hline \end{tabular} \end{sidewaystable} I learn that the forloop package provides the for loop. But I am not sure how to apply it to my case? Or other methods not by forloop? Thanks and regards! Update: If I also want to simply another similar case, where the only difference is that the directory does not run from 1, 2, to 23, but in some arbitrary order such as 3, 2, 6, 9,..., or even a list of strings such as dira, dirc, dird, dirb,.... How to make the latex code into loops then? Thanks!

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  • Why is OracleDataAdapter.Fill() Very Slow?

    - by John Gietzen
    I am using a pretty complex query to retrieve some data out of one of our billing databases. I'm running in to an issue where the query seems to complete fairly quickly when executed with SQL Developer, but does not seem to ever finish when using the OracleDataAdapter.Fill() method. I'm only trying to read about 1000 rows, and the query completes in SQL Developer in about 20 seconds. What could be causing such drastic differences in performance? I have tons of other queries that run quickly using the same function. Here is the code I'm using to execute the query: using Oracle.DataAccess.Client; ... public DataTable ExecuteExternalQuery(string connectionString, string providerName, string queryText) { DbConnection connection = null; DbCommand selectCommand = null; DbDataAdapter adapter = null; switch (providerName) { case "System.Data.OracleClient": case "Oracle.DataAccess.Client": connection = new OracleConnection(connectionString); selectCommand = connection.CreateCommand(); adapter = new OracleDataAdapter((OracleCommand)selectCommand); break; ... } DataTable table = null; try { connection.Open(); selectCommand.CommandText = queryText; selectCommand.CommandTimeout = 300000; selectCommand.CommandType = CommandType.Text; table = new DataTable("result"); table.Locale = CultureInfo.CurrentCulture; adapter.Fill(table); } finally { adapter.Dispose(); if (connection.State != ConnectionState.Closed) { connection.Close(); } } return table; } And here is the general outline of the SQL I'm using: with trouble_calls as ( select work_order_number, account_number, date_entered from work_orders where date_entered >= sysdate - (15 + 31) -- Use the index to limit the number of rows scanned and wo_status not in ('Cancelled') and wo_type = 'Trouble Call' ) select account_number, work_order_number, date_entered from trouble_calls wo where wo.icoms_date >= sysdate - 15 and ( select count(*) from trouble_calls repeat where wo.account_number = repeat.account_number and wo.work_order_number <> repeat.work_order_number and wo.date_entered - repeat.date_entered between 0 and 30 ) >= 1

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  • Slow query with unexpected index scan

    - by zerkms
    Hello I have this query: SELECT * FROM sample INNER JOIN test ON sample.sample_number = test.sample_number INNER JOIN result ON test.test_number = result.test_number WHERE sampled_date BETWEEN '2010-03-17 09:00' AND '2010-03-17 12:00' the biggest table here is RESULT, contains 11.1M records. The left 2 tables about 1M. this query works slowly (more than 10 minutes) and returns about 800 records. executing plan shows clustered index scan (over it's PRIMARY KEY (result.result_number, which actually doesn't take part in query)) over all 11M records. RESULT.TEST_NUMBER is a clustered primary key. if I change 2010-03-17 09:00 to 2010-03-17 10:00 - i get about 40 records. it executes for 300ms. and plan shows index seek (over result.test_number index) if i replace * in SELECT clause to result.test_number (covered with index) - then all become fast in first case too. this points to hdd IO issues, but doesn't clarifies changing plan. so, any ideas? UPDATE: sampled_date is in table sample and covered by index. other fields from this query: test.sample_number is covered by index and result.test_number too. UPDATE 2: obviously than sql server in any reasons don't want to use index. i did a small experiment: i remove INNER JOIN with result, select all test.test_number and after that do SELECT * FROM RESULT WHERE TEST_NUMBER IN (...) this, of course, works fast. but i cannot get what is the difference and why query optimizer choose such inappropriate way to select data in 1st case.

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  • "Unable To Load Client Print Control" - SSRS Printing problems again

    - by mamorgan1
    Please forgive me as my head is spinning. I have tried so many solutions to this issue, that I'm almost not sure where I am at this point. At this point in time I have these issues in my Production, Test, and Dev environments. For simplicity sake, I will just try to get it working in Dev first. Here is my setup: Database/Reporting Server (Same server): Windows Server 2003 SP2 SQL Server 2005 SP3 Development Box: Windows 7 Visual Studio 2008 SP1 SQL Server 2008 SP1 (not being used in this case, but wanted to include it in case it is relative) Internet Explorer 8 Details: * I have a custom ASP.NET application that is using ReportViewer to access reports on my Database/Reporting Server. * I am able to connect directly to Report Manager and print with no trouble. * When I view source on the page with ReportViewer, it says I'm am using version 9.0.30729.4402 . * The classid of the rsclientprint.dll that keeps getting installed to my c:\windows\downloaded program files directory is {41861299-EAB2-4DCC-986C-802AE12AC499}. * I have tried taking the rsclientprint.cab file from my Database/Reporting Server and installing it directly to my Development Box and had no success. I made sure to unregister the previously installed dll first. I feel like I have read as many solutions as I can, and so I turn to you for some assistance. Please let me know if I can provide further details that would be helpful. Thanks

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  • LinearLayout not expanding inside a ScrollView

    - by Felix
    I have a LinearLayout inside a ScrollView that has android:layout_height="fill_parent", but it doesn't expand to the full height of the ScrollView. My layout looks something like: level layout layout_width layout_height 1 LinearLayout fill_parent fill_parent 2 LinearLayout fill_parent wrap_content 3 (some irrelevant stuff) 2 ScrollView fill_parent fill_parent <-- this expands full height 3 LinearLayout fill_parent fill_parent <-- this does not (has orientation=vertical) (following stuff probably are irrelevant, but just to be sure:) 4 TextView fill_parent fill_parent 4 LinearLayout fill_parent wrap_content I can see that the LinearLayout doesn't expand the full height of the ScrollView because in Eclipse in Android Layout Editor, if I select the ScrollView (in the Outline panel) it is highlighted with a red border that fills the screen to the bottom but when I select the LinearLayout its highlight doesn't expand to the bottom of the screen. How can I get it to do so? The effect I'm trying to achieve is to have some text and a button below it (inside the LinearLayout in level 4 there's just a button). The text can be big enough to need a scrollbar, in which case I want the user to have to scroll down in order to see the button. In case the text is not big enough for a scroll bar, I want the LinearLayout containing the button to stick to the bottom of the screen.

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  • dotRAS Disconnected State not triggered

    - by JD
    Can someone give me a heads up... I'm trying to use the dotRAS .NET control, and this code to change the value of internetConnected (boolean) using an event handler... But it seems that the state RasConnectionState.Disconnected is not triggered by dotRAS hangup().. Any ideas? Am I doing it totally wrong... or have I managed to find a bug? public class USBModem { // private vars private RasDialer dialer = new RasDialer(); private bool internetConnected = false; /// <summary> /// Default constructor for USBModem /// </summary> public USBModem() { // Add Events for dialer dialer.StateChanged += new EventHandler<StateChangedEventArgs>(dialer_StateChanged); } void dialer_StateChanged(object sender, StateChangedEventArgs e) { // Handle state changes here switch (e.State) { case RasConnectionState.Connected: internetConnected = true; Console.WriteLine(e.State.ToString()); break; case RasConnectionState.Disconnected: internetConnected = false; Console.WriteLine(e.State.ToString()); break; default: Console.WriteLine("INFO -> Unhandled state: " + e.State.ToString()); break; } } public void ConnectInternet(string connectionName) { // Dial dialer.PhoneBookPath = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers); dialer.EntryName = connectionName; dialer.DialAsync(); } public void DisconnectInternet() { foreach (RasConnection connection in dialer.GetActiveConnections()) { connection.HangUp(); } } }

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  • mysql backup and restore from ib_logfile failure

    - by i need help
    Here's the case: After computer being hacked, we are in a rush to backup all data out to other computer. As a result, the mysql databases are not backup out as sql statement. What we have done is backup out all the physical files/folders in the C drive to new computer. Eg: C:\Program Files\MySQL\MySQL Server 4.1\data In this case, all data for mysql are inside unreadable file. Inside data folder consist of files like ib_logfile0, ib_logfile1, but not ib_data1 All database's table structure format are inside each respective folder. (Some folder have .frm, .opt) (some other folder have .frm, .myd, .myi) How can I retrieve back the data from the database in a new computer? I tried to install the same mysql version(4.1) at new computer, then replace all backup files inside data folder into this mysql in new computer. Then restart mysql service. When I restart, it fail: Could not start mysql service on local computer. error 1067: process terminated unexpectedly. Error log showing: InnoDB: The first specified data file .\ibdata1 did not exist: InnoDB: a new database to be created! 090930 10:24:49 InnoDB: Setting file .\ibdata1 size to 10 MB InnoDB: Database physically writes the file full: wait... InnoDB: Error: log file .\ib_logfile0 is of different size 0 87031808 bytes InnoDB: than specified in the .cnf file 0 25165824 bytes! 090930 10:24:49 [ERROR] Can't init databases 090930 10:24:49 [ERROR] Aborting 090930 10:24:49 [Note] C:\Program Files\MySQL\MySQL Server 4.1\bin\mysqld-nt: Shutdown complete

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  • InvalidOperationException (Lambda parameter not in scope) when trying to Compile a Lambda Expression

    - by Moshe Levi
    Hello, I'm writing an Expression Parser to make my API more refactor friendly and less error prone. basicaly, I want the user to write code like that: repository.Get(entity => entity.Id == 10); instead of: repository.Get<Entity>("Id", 10); Extracting the member name from the left side of the binary expression was straight forward. The problems began when I tried to extract the value from the right side of the expression. The above snippet demonstrates the simplest possible case which involves a constant value but it can be much more complex involving closures and what not. After playing with that for some time I gave up on trying to cover all the possible cases myself and decided to use the framework to do all the heavy lifting for me by compiling and executing the right side of the expression. the relevant part of the code looks like that: public static KeyValuePair<string, object> Parse<T>(Expression<Func<T, bool>> expression) { var binaryExpression = (BinaryExpression)expression.Body; string memberName = ParseMemberName(binaryExpression.Left); object value = ParseValue(binaryExpression.Right); return new KeyValuePair<string, object>(memberName, value); } private static object ParseValue(Expression expression) { Expression conversionExpression = Expression.Convert(expression, typeof(object)); var lambdaExpression = Expression.Lambda<Func<object>>(conversionExpression); Func<object> accessor = lambdaExpression.Compile(); return accessor(); } Now, I get an InvalidOperationException (Lambda parameter not in scope) in the Compile line. when I googled for the solution I came up with similar questions that involved building an expression by hand and not supplying all the pieces, or trying to rely on parameters having the same name and not the same reference. I don't think that this is the case here because I'm reusing the given expression. I would appreciate if someone will give me some pointers on this. Thank you.

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  • Writing tests for Rails plugins

    - by Adam
    I'm working on a plugin for Rails that would add limited in-memory caching to ActiveRecord's finders. The functionality itself is mature enough, but I can't for the life of me get unit tests to work with the plugin. I now have under vendor/plugins/my_plugin/test/my_plugin_test.rb a standard subclass of ActiveSupport::TestCase with a couple of basic tests. I try running 'rake test' from the plugin directory, and I have confirmed that this task loads the ruby file with the test case, but it doesn't actually run any of the tests. I followed the Rails plugin guide (http://guides.rubyonrails.org/plugins.html) where applicable, but it seems to be horribly outdated (it suggests things that Rails now do automatically, etc.) The only output I get is this: Kakadu:ingenious_record adam$ rake test (in /Users/adam/Sites/1_PRK/vendor/plugins/ingenious_record) /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -Ilib:lib:test "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader.rb" "test/ingenious_record_test.rb" The simplest test case looks like this: require 'test_helper' require 'active_record' class IngeniousRecordTest < ActiveSupport::TestCase test "example" do assert false end end This should definitely produce at least some output, and the only test in that file should produce a failed assertion. Any ideas what I could do to get Rails to run my tests?

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  • Android Activity is displayed after user unlocks the screen

    - by Dave
    Hi, I was wondering if anyone understood how to make your application be displayed when you unlock the screen. I have an application where the user turns on a Bluetooth device, it connects to the phone, and the user should be presented with a UI. Having them hunt for the app or using the notification menu is not a workable option (too much work and not the obvious behavior). The problem is that: When the screen is unlocked: - you can popup the activity from the background service when Bluetooth connects to a device - User is happy because the UI is right there When the screen is locked: - The application gets started but is destroyed - User unlocks the phone and nothing is there but the homescreen One work around would be to disable the keyguard when the application gets woken up but the nuclear option is a pretty bad option. PS: I know the standard Android assumption is that you shouldn't do this. In the normal case this behavior is fine, but in this case I explicitly did something I want the phone to respond without adding more work for the user to do. As per Google's guidelines if you don't like this behavior there can be an option for you to turn this off or you can not use the application.

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  • Fix common library functions, or abandon then?

    - by Ian Boyd
    Imagine i have a function with a bug in it: Boolean MakeLocation(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" return City+", "+State; } So the call: MakeLocation("Springfield", "MO"); would return "Springfield, MO" Now there's a slight problem, what if the user called: MakeLocation("Springfield, MO", "OH"); The called it wrong, obviously. But the function would return "Springfield, MO, OH". The system was functioning like this for many years, until i noticed the function being used wrong, and i corrected it. And i also updated the original function to catch such an obvious mistake - in case it's happening elsewhere: Boolean MakeLocation(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" if (City.Contains, ",") throw new EMakeLocationException("City name contains a comma. You probably didn't mean that"); return City+", "+State; } And testing showed the problem fixed. Except we missed an edge case, and the customer found it. So now the moral dillema. Do you ever add new sanity checks, safety checks, assertions to exising code? Or do you call the old function abandoned, and have a new one: Boolean MakeLocation(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" return City+", "+State; } Boolean MakeLocation2(String City, String State) { //Given "Springfield", "MO" //return "Springfield, MO" if (City.Contains, ",") throw new EMakeLocationException("City name contains a comma. You probably didn't mean that"); return City+", "+State; } The same can apply for anything: Question FetchQuestion(Int id) { if (id == 0) throw new EFetchQuestionException("No question ID specified"); ... } Do you risk breaking existing code, at the expense of existing code being wrong?

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  • Join 3 tables in 1 LINQ-EF

    - by user100161
    I have to fill warehouse table cOrders with program using Ado.NET EF. I have SQL command but i don't know how to do this with LINQ. static void Main(string[] args) { var SPcontex = new PI_NorthwindSPEntities(); var contex = new NorthwindEntities(); dCustomers dimenzijaCustomers = new dCustomers(); dDatum dimenzijaDatum = new dDatum(); ... CREATE TABLE PoslovnaInteligencija.dbo.cOrders( cOrdersID int PRIMARY KEY IDENTITY(1,1), OrderID int NOT NULL, dCustomersID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dCustomers(dCustomersID), dEmployeesID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dEmployees(dEmployeesID), OrderDateID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dDatum(sifDatum), RequiredDateID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dDatum(sifDatum), ShippedDateID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dDatum(sifDatum), dShippersID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dShippers(dShippersID), dShipID int FOREIGN KEY REFERENCES PoslovnaInteligencija.dbo.dShip(dShipID), Freight money, WaitingDay int ) INSERT INTO PoslovnaInteligencija.dbo.cOrders (OrderID, dCustomersID, dEmployeesID, OrderDateID, RequiredDateID, dShippersID, dShipID, Freight, ShippedDateID, WaitingDay) SELECT OrderID, dc.dCustomersID, de.dEmployeesID, orderD.sifDatum, requiredD.sifDatum, dShippersID, ds.dShipID, Freight, ShippedDateID=CASE WHEN (ShippedDate IS NULL) THEN -1 ELSE shippedD.sifDatum END, WaitingDay=CASE WHEN (shippedD.sifDatum - orderD.sifDatum) IS NULL THEN -1 ELSE shippedD.sifDatum - orderD.sifDatum END FROM PoslovnaInteligencija.dbo.dShippers AS s, PoslovnaInteligencija.dbo.dCustomers AS dc, PoslovnaInteligencija.dbo.dEmployees AS de, PoslovnaInteligencija.dbo.dShip AS ds,PoslovnaInteligencija.dbo.dDatum AS orderD, PoslovnaInteligencija.dbo.dDatum AS requiredD, PoslovnaInteligencija.dbo.Orders AS o LEFT OUTER JOIN PoslovnaInteligencija.dbo.dDatum AS shippedD ON shippedD.datum=DATEADD(dd, 0, DATEDIFF(dd, 0, o.ShippedDate)) WHERE o.ShipVia=s.ShipperID AND dc.CustomerID=o.CustomerID AND de.EmployeeID=o.EmployeeID AND ds.ShipName=o.ShipName AND orderD.datum=DATEADD(dd, 0, DATEDIFF(dd, 0, o.OrderDate)) AND requiredD.datum=DATEADD(dd, 0, DATEDIFF(dd, 0, o.RequiredDate));

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  • How does the recursion here work?

    - by David
    code 1: public static int fibonacci (int n){ if (n == 0 || n == 1) { return 1; } else { return fibonacci (n-1) + fibonacci (n-2); } } how can you use fibonacci if you haven't gotten done explaining what it is yet? I've been able to understand using recursion in other cases like this: code two: class two { public static void two (int n) { if (n>0) { System.out.println (n) ; two (n-1) ; } else { return ; } } public static void main (String[] arg) { two (12) ; } } In the case of code 2 though n will eventualy reach a point at which it doesnt satisfy n0 and the method will stop calling itself recursivly. in the case of code 2 though i don't see how it would be able to get itself from 1 if n=1 was the starting point to 2 and 3 and 5 and so on. Also i don't see how the line `return fibonacci (n-1) + fibonacci (n-2) would work since fibbonacci n-2 has to contain in some sense fibonacci n-1 in order to wrok but it isn't there yet. I know my question is worded poorly but looking at this is making my mind explode. the book i'm looking at says it will work. how does it work? `

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  • UiPickerView change font color according data

    - by Fulkron
    I'm using a pickerView with multiple components related to several fields in a Database (CoreData). Is it possible to change the fontcolor for a specific component according the presence of data in the DB ? For example the field in the DB is null the component font color should be RED otherwise black. Any help will be appreciated ! Dario ================== Thanks Kenny, I have to apply to a single UIPicker only. So I', returning the view parametere (without modificatiosn). The result is all the pickers show empty rows. Thanks for help ! Here you will find the code fragment: - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { if (pickerView == tipoPk){ UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100,30)]; label.textColor = [UIColor redColor]; switch (component) { case PK_Tipo: label.text = [tipoArray objectAtIndex:row]]; break; case PK_Settore: label.text = [settoreArray objectAtIndex:row]]; break; default: break; } return label; } else { return view; // <==== return view for non related pickerviews , but no rows shown } }

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  • C++/CLI managed thread cleanup

    - by Guillermo Prandi
    Hi. I'm writing a managed C++/CLI library wrapper for the MySQL embedded server. The mysql C library requires me to call mysql_thread_init() for every thread that will be using it, and mysql_thread_end() for each thread that exits after using it. Debugging any given VB.Net project I can see at least seven threads; I suppose my library will see only one thread if VB doesn't explicitly create worker threads itself (any confirmations on that?). However, I need clients to my library to be able to create worker threads if they need to, so my library must be thread-aware to some degree. The first option I could think of is to expose some "EnterThread()" and "LeaveThread()" methods in my class, so the client code will explicitly call them at the beginning and before exiting their DoWork() method. This should work if (1) .Net doesn't "magically" create threads the user isn't aware of and (2) the user is careful enough to have the methods called in a try/finally structure of some sort. However, I don't like it very much to have the user handle things manually like that, and I wonder if I could give her a hand on that matter. In a pure Win32 C/C++ DLL I do have the DllMain DLL_THREAD_ATTACH and DLL_THREAD_DETACH pseudo-events, and I could use them for calling mysql_thread_init() and mysql_thread_end() as needed, but there seem to be no such thing in C++/CLI managed code. At the expense of some performance (not much, I think) I can use TLS for detecting the "usage from a new thread" case, but I can imagine no mechanism for the thread exiting case. So, my questions are: (1) could .net create application threads without the user being aware of them? and (2) is there any mechanism I could use similar to DLL_THREAD_ATTACH / DLL_THREAD_DETACH from managed C++/CLI? Thanks in advance.

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  • Perl unpack in list context

    - by drewk
    A common 'Perlism' is generating a list as something to loop over in this form: for($str=~/./g) { print "the next character from \"$str\"=$_\n"; } In this case the global match regex returns a list that is one character in turn from the string $str, and assigns that value to $_ Instead of a regex, split can be used in the same way or 'a'..'z', map, etc. I am investigating unpack to generate a field by field interpretation of a string. I have always found unpack to be less straightforward to the way my brain works, and I have never really dug that deeply into it. As a simple case, I want to generate a list that is one character in each element from a string using unpack (yes -- I know I can do it with split(//,$str) and /./g but I really want to see if unpack can be used this way...) Obviously, I can use a field list for unpack that is unpack("A1" x length($str), $str) but is there some other way that kinda looks like globbing? ie, can I call unpack(some_format,$str) either in list context or in a loop such that unpack will return the next group of character in the format group until $str is exausted? I have read The Perl 5.12 Pack pod and the Perl 5.12 pack tutorial and the Perkmonks tutorial Here is the sample code: #!/usr/bin/perl use warnings; use strict; my $str=join('',('a'..'z', 'A'..'Z')); #the alphabet... $str=~s/(.{1,3})/$1 /g; #...in groups of three print "str=$str\n\n"; for ($str=~/./g) { print "regex: = $_\n"; } for(split(//,$str)) { print "split: \$_=$_\n"; } for(unpack("A1" x length($str), $str)) { print "unpack: \$_=$_\n"; }

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  • Unable to convert from Julian INT date to regular TSQL Datetime

    - by Bluehiro
    Help me Stackoverflow, I'm close to going all "HULK SMASH" on my keyboard over this issue. I have researched carefully but I'm obviously not getting something right. I am working with a Julian dates referenced from a proprietary tool (Platinum SQL?), though I'm working in SQL 2005. I can convert their "special" version of Julian into datetime when I run a select statement. Unfortunately it will not insert into a datetime column, I get the following error when I try: The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value. So I can't setup datetime criteria for running a report off of the Stored Procedure. Original Value: 733416 Equivalent Calendar Value: 01-09-2009 Below is my code... I'm so close but I can't quite see what's wrong, I need my convert statement to actually convert the Julian value (733416) into a compatible TSQL DATETIME value. SELECT org_id, CASE WHEN date_applied = 0 THEN '00-00-00' ELSE convert(char(50),dateadd(day,date_applied-729960,convert(datetime, '07-25-99')),101) END AS date_applied, CASE WHEN date_posted = 0 THEN '00-00-00' ELSE convert(char(50),dateadd(day,date_posted-729960,convert(datetime, '07-25-99')),101) END AS date_posted from general_vw

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