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  • Continuously reading from a stream in C#?

    - by Damien Wildfire
    I have a Stream object that occasionally gets some data on it, but at unpredictable intervals. Messages that appear on the Stream are well-defined and declare the size of their payload in advance (the size is a 16-bit integer contained in the first two bytes of each message). I'd like to have a StreamWatcher class which detects when the Stream has some data on it. Once it does, I'd like an event to be raised so that a subscribed StreamProcessor instance can process the new message. Can this be done with C# events without using Threads directly? It seems like it should be straightforward, but I can't get quite get my head around the right way to design this.

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  • I have two list boxes(A,B) with some values and i can send values from A to B or B to A

    - by Dev
    I have two list boxes(A,B) with some values and i can send values from A to B or B to A and i have one save button. For the first time without updating any list box if i click on save button i am showing message like "NO changes or Done" But once i send one item from A to B and again sending that same item from B to A it means no changes or Done. here also i want to show same message "NO changes or Done" .but i am unable to fine the staus can any one pleasse give code or tips to find the default status for listboxs in javascript. Thanks

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  • Emacs and Long Shell Commands

    - by darrint
    Is there a way to run a shell command, have the output show up in a new buffer and have that output show up incrementally? Eshell and other emacs terminal emulators do a find job of this but I see no way to script them. What I'd like to do is write little elisp functions to do stuff like run unit tests, etc. and watch the output trickle into a buffer. The elisp function shell-command is close to what I want but it shows all the output at once when the process finishes.

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  • Storing information in the DOM?

    - by John
    Im making a small private message application in the form of a phone. Ten messages are shown at the time. And the list of messages are scrolled up/down by hiding them. Just how bad is it to use the DOM to store information in this way. My main goal for doing this is to reduce calls to the database. And instead of making a new call all the time, it only checks if any new messages has arrived and ads the new message(s). Whats the alternative, cookies anyone? Thank you for the time

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  • How to handle uncaught Exceptions in javascript without a try/catch-block?

    - by user344238
    What i try to accomplish is to register a global handler to catch all uncaught exceptions. Searching the web i only managed to find people pointing out window.onerror but this doesn't do the trick for me. Apparently window.onerror only gets called upon errors and not upon exceptions. Assume the following code: function windowError(message, url, line) { alert(message, url, line); } window.onerror=windowError; throw("uncaught"); The obviously uncaught exception won't trigger the windowError handler. (Using Firefox 3.6.3) Any suggestions?

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  • Why Timer does not work if we do not generate a window?

    - by Roman
    Here is the code: import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.Timer; public class TimerSample { public static void main(String args[]) { new JFrame().setVisible(true); ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { System.out.println("Hello World Timer"); } }; Timer timer = new Timer(500, actionListener); timer.start(); } } It generates a window and then periodically prints "Hello World Timer" in the terminal (Command Prompt). If I comment this line new JFrame().setVisible(true); the application do not print anything to the command line. Why?

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  • AngularJS: Better way to display success messages

    - by Sup
    $('body').on('click', '#save-btn', function () { $('#greetingsModal').modal('show'); }); <div id="greetingsModal" class="modal hide fade" tabindex="-1" role="dialog" aria- labelledby="myModalLabel" aria-hidden="true"> <div class="alert alert-success"> <a href="../admin/Supplier" class="close" data-dismiss="alert">x</a> <strong>Well done!</strong>. </div> I want to display a popup message using the above styles whenever 'save-btn' is clicked. The above code works fine but there is a lot of time delay by doing it this way. Is there any way to display such a alert message using angular?

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  • How to write an unit test for WCF behaviors?

    - by katie77
    I am new to unit testing. How do I write a unit test for a method when I am extending a WCF behavior. Since I am not sure of when the class is being instantiated, or I can not change the method signature. In the behavior implementation, I am getting the header and looking up a value in the config. public class IncomingValidator : IDispatchMessageInspector { public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext) { // Grab the header and see if one of the particular values(read from config) is there. } public void BeforeSendReply(ref Message reply, object correlationState) { } }

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  • In C# or .NET, is there a way to prevent other threads from invoking methods on a particular thread?

    - by YWE
    I have a Windows Forms application with a BackgroundWorker. In a method on the main form, a MessageBox is shown and the user must click the OK button to continue. Meanwhile, while the messagebox is being displayed, the BackgroundWorker finishes executing and calls the RunWorkerCompleted event. In the method I have assigned to that event, which runs on the UI thread, the Close method is called on the form. Even though the method that shows the message box is still running, the UI thread is not blocking other threads from invoking methods on it. So the Close method gets called on the form. What I want is for the UI thread to block other threads' invokes until the method with the message box has finished. Is there an easy way to do that?

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  • Mercurial - How do you export your repo's source to a production site?

    - by orokusaki
    I've tried using archive in Tortoise HG by opening my repo change log. This doesn't seem to be anything like SVN's export command, where I can simply export a remote repository to the current directory. I use this to get a clean copy of my source for production (without notes and repository data). How can I do something like this in HG? Or, should I just use clone and deal with the repo related data manually? BTW, I need to do this all via command line since I'm not going to be using Tortoise HG on my Linux server. Any help is much appreciated.

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  • Output custom messages based on row value

    - by decimal
    I've made a simple guestbook mysql/php page. An entry is displayed if the approve column has a value of 1. For the adminstrator, I want to display either "message approved" or "not approved". Here's my code: while ($row = mysql_fetch_array ($r)) { print "<p>Guest:" .$row['name']. "</p> <p>Date:" .$row['date']. "</p> <p>Comment:". $row['comment']. "</p>"; if ($row['approve'] = '1') { print '<p>YES, the message has been approved</p>'; } else { print '<p>NO, it hasn\'t been approved</p>'; } Whatever value the if statement checks approve is equal to, all approve values are output as that value.

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  • sql - duplicates

    - by Sebastjan
    Hey guys I'm putting data from website (json) to sql base. In db i have these rows. ID | PostId | Name | Message Id is auto-increment primary key. PostId also has a unique values. Name and Message are nothing special. When I run my script / click on the button in form / ... , the program saves all the values into database (lets say there are 25). Next time I'm going to press the button there will be added 25 more records (all duplicates), and so on... Is there a way that the program can check through 'PostIds' if the value already exists before adding it to the db? Thanks

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  • freeing malloc and checkin it is empty or not

    - by gcc
    char *p; p="kjkjk"; . .//there are codes which are checking another command . if(.....)//i used pointer p in only that area free(p); . . //there are codes which are checking another command . if(p==NULL) //i check whether is empty .... if(p==-1) //can we use "EOF==p " in if statement ... //are there any usage like that EOF==p else .... I think there is big error , but where?

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  • How to generate R.java by a manual on Linux platform

    - by user305787
    I have a question. I am developing android applcation on Linux platform because i have to make a system.img with a application. When adding a drawable resource and building the project with mm command, i met a below error. "cannot find symbol R.drawable.icon_send_type" At above error, the icon_send_type is the added resource. This error occurred because the mm command did not generate R.java. So, i want to know how to generate R.java by a manual on Linux platform. Please help me.

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  • R: Change the fields' (slots') values of the class assigning a value to some other field

    - by Max Li
    Assgning a value to one field, how can I make the other fields changing. Consider the following R5 class C<-setRefClass("C", fields=list(a="numeric",b="numeric") , methods=list( seta = function(x){ a<<-x b<<-x+10 cat("The change took place!") } ) # end of the methods list ) # end of the class Now create the instance of the class c<-C$new() This command c$seta(10) will result in that c$a is 10 and c$b is 20. So it actually works, however, I want to achieve this result by the command c$a<-10 (i.e. after that I want c$b to be equal to 20 as defined in the class in the logic of seta() function) How can I do it?

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  • regular expression

    - by Altariste
    Hi, I need to find all invocations of some logging macros in the code. The macro invocation is of the form: DEBUG[1-5] ( "methodName: the logged message", arguments) But the new versions of the macros are prepending the name of the method automatically, so my task is to write a Python script that will remove the duplicate function names specified already by the programmer. I'm using the sub function from the re module. I plan to substitute the part indicated by || signs below : ||DEBUG[1-5] ("methodName: || the logged message", arguments) with simply DEBUG[1-5](" The problem is following: To find the expressions I want to substitute, I use the following regular expression: ((DEBUG | INFO | all other macros names )[1-5]*)\s*\(\"\w+: But it doesn't match the whole expression ( from DEBUG right to the colon ), but only the macro name, that is for example DEBUG5. Is my expression wrong or there is some quirk in the Python regex processing? ( maybe the fact that I use the DEBUG[1-5] as a subgroup has something to do with this? ) Help from anyone more knowledgable than me appreciated :).

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  • Can I find out what WCF methods are supported on the endpoint before calling it?

    - by alord1689
    I have a versioning issue with a WCF service contract in which one of the many endpoints which are called for the operation is missing one method from the contract. My question is, how can I make sure the command is available on the client before attempting to call it? I tried: foreach (var od in proxy.Endpoint.Contract.Operations) { if (od.Name == "MyMethodName") { hasMethod = true; break; } } Unfortunately, this is using the contract from the calling app and does not actually describe the implementations on the endpoint itself. As a result, it returns true even though the endpoint has failed to implement the command.

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  • ID cannot be null (Auto Increment)

    - by THeK
    I'm using an INSERT ON DUPLICATE KEY statement for my website. It's for creating news items, so I figured I could use the same MySQL command for both creating and updating news items. However, when I use the following: INSERT INTO table (id,title,content) VALUES(NULL,"Test","Test"); Instead of creating a new auto increment value it throws an error. However, the command works on my main development server. But not on my laptop. Both versions of MySQL are the same, the only difference being MySQL was installed manually on my server, and with WAMP on my laptop. Are there any MySQL Variables that could be causing this?

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  • illigal start of type error (java).

    - by David
    here is the relevent code snippet: public static Rand searchCount (int[] x) { int a ; int b ; int c ; int d ; int f ; int g ; int h ; int i ; int j ; Rand countA = new Rand () ; for (int l= 0; l<x.length; l++) { if (x[l] = 0) a++ ; else if (x[l] = 1) b++ ; } } return countA ; } (Rand is the name of the class that this method is in) when compiling it get this error message: Rand.java:77: illegal start of type return countA ; ^ what's going wrong here? what does this error message mean?

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  • Super strange PHP error

    - by Industrial
    Hi everyone, When trying memcache:get, I'll get the following error message back: Message: Memcache::get() [memcache.get]: Server localhost (tcp 11211) failed with: Failed reading line from stream (0) I run a Windows 32bit test environment (XP) and here's how my code looks: function getMulti(array $keys) { $items = $this->memcache->get($keys); return $items; } My memcache servers are two local computers in the LAN that my dev. environment is connected to. Sure, I can turn the error logging off or just put an @ before the get function call, but that doesnt solve this issue. What can I do? Thanks a lot!

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