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  • How do I print an HTML document from a web service?

    - by Chris Marasti-Georg
    I want to print HTML from a C# web service. The Web Browser control is overkill, and does not function well in a service-environment, nor does it function well on a system with very tight security constraints. Is there any sort of free .NET library that will support the printing of a basic HTML page? Here is the code I have so far, that is not running properly. public void PrintThing(string document) { if (Thread.CurrentThread.GetApartmentState() != ApartmentState.STA) { Thread thread = new Thread((ThreadStart) delegate { PrintDocument(document); }); thread.SetApartmentState(ApartmentState.STA); thread.Start(); } else { PrintDocument(document); } } protected void PrintDocument(string document) { WebBrowser browser = new WebBrowser(); browser.DocumentText = document; while (browser.ReadyState != WebBrowserReadyState.Complete) { Application.DoEvents(); } browser.Print(); } This works fine when called from UI-type threads, but nothing happens when called from a service-type thread. Changing Print() to ShowPrintPreviewDialog() yields the following IE script error: Error: 'dialogArguments.___IE_PrintType' is null or not an object URL: res://ieframe.dll/preview.dlg And a small empty print preview dialog appears.

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  • Help me understand entity framework 4 caching for lazy loading

    - by Chris
    I am getting some unexpected behaviour with entity framework 4.0 and I am hoping someone can help me understand this. I am using the northwind database for the purposes of this question. I am also using the default code generator (not poco or self tracking). I am expecting that anytime I query the context for the framework to only make a round trip if I have not already fetched those objects. I do get this behaviour if I turn off lazy loading. Currently in my application I am breifly turning on lazy loading and then turning it back off so I can get the desired behaviour. That pretty much sucks, so please help. Here is a good code example that can demonstrate my problem. Public Sub ManyRoundTrips() context.ContextOptions.LazyLoadingEnabled = True Dim employees As List(Of Employee) = context.Employees.Execute(System.Data.Objects.MergeOption.AppendOnly).ToList() 'makes unnessesary round trip to the database, I just loaded the employees' MessageBox.Show(context.Employees.Where(Function(x) x.EmployeeID < 10).ToList().Count) context.Orders.Execute(System.Data.Objects.MergeOption.AppendOnly) For Each emp As Employee In employees 'makes unnessesary trip to database every time despite orders being pre loaded.' Dim i As Integer = emp.Orders.Count Next End Sub Public Sub OneRoundTrip() context.ContextOptions.LazyLoadingEnabled = True Dim employees As List(Of Employee) = context.Employees.Include("Orders").Execute(System.Data.Objects.MergeOption.AppendOnly).ToList() MessageBox.Show(employees.Where(Function(x) x.EmployeeID < 10).ToList().Count) For Each emp As Employee In employees Dim i As Integer = emp.Orders.Count Next End Sub Why is the first block of code making unnessesary round trips?

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  • Fatal error on a non-object

    - by Chris Leah
    Hey, so I have created a function to check the DB for unique entries, but when I call the function it doesn't seem to work and gives me a fatal error any ideas ? Thanks :) //Check for unique entries function checkUnique($table, $field, $compared) { $query = $mysqli->query('SELECT '.$mysqli->real_escape_string($field).' FROM '.$mysqli->real_escape_string($table).' WHERE "'.$mysqli->real_escape_string($field).'" = "'.$mysqli->real_escape_string($compared).'"'); if(!$query){ return TRUE; } else { return FALSE; } } The page calling it..... //Start session session_start(); //Check if the session is already set, if so re-direct to the game if(isset($_SESSION['id'], $_SESSION['logged_in'])){ Header('Location: ../main/index.php'); }; //Require database connection require_once('../global/includes/db.php'); require_once('../global/functions/functions.php'); //Check if the form has been submitted if (isset($_POST['signup'])){ //Validate input if (!empty($_POST['username']) && !empty($_POST['password']) && $_POST['password']==$_POST['password_confirm'] && !empty($_POST['email']) && validateEmail($_POST['email']) == TRUE && checkUnique('users', 'email', $_POST['email']) == TRUE && checkUnique('users', 'username', $_POST['username']) == TRUE) { //Insert user to the database $insert_user = $mysqli->query('INSERT INTO (`username, `password`, `email`, `verification_key`) VALUES ("'.$mysqli->real_escape_string($_POST['username']).'", "'.$mysqli-real_escape_string(md5($_POST['password'])).'", "'.$mysqli->real_escape_string($_POST['email']).'", "'.randomString('alnum', 32). '"') or die($mysqli->error()); //Get user information $getUser = $mysqli->query('SELECT id, username, email, verification_key FROM users WHERE username = "'.$mysqli->real_escape_string($_POST['username']).'"' or die($mysqli->error())); //Check if the $getUser returns true if ($getUser->num_rows == 1) { //Fetch associated fields to this user $row = $getUser->fetch_assoc(); //Set mail() variables $headers = 'From: [email protected]'."\r\n". 'Reply-To: [email protected]'."\r\n". 'X-Mailer: PHP/'.phpversion(); $subject = 'Activate your account (Music Battles.net)'; //Set verification email message $message = 'Dear '.$row['username'].', I would like to welcome you to Music Battles. Although in order to enjoy the gmae you must first activate your account. \n\n Click the following link: http://www.musicbattles.net/home/confirm.php?id='.$row['id'].'key='.$row['verification_key'].'\n Thanks for signing up, enjoy the game! \n Music Battles Team'; //Attempts to send the email if (mail($row['email'], $subject, $message, $headers)) { $msg = '<p class="success">Accound has been created, please go activate it from your email.</p>'; } else { $error = '<p class="error">The account was created but your email was not sent.</p>'; } } else { $error = '<p class="error">Your account was not created.</p>'; } } else { $error = '<p class="error">One or more fields contain non or invalid data.</p>'; } } Erorr.... Fatal error: Call to a member function query() on a non-object in /home/mbattles/public_html/global/functions/functions.php on line 5

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  • qtableview (libqt) how do I correctly create a QModelIndex

    - by Chris Camacho
    I'm trying to enter edit mode on a specific cell like this void MainWindow::on_addButton_released(void) { tm->addRow(); tableView->scrollToBottom(); int ec=tm->firstWritableColumn(); int r=tm->rowCount(QModelIndex()); QModelIndex id = tm->index(r, ec, QModelIndex()); tableView->setCurrentIndex(id); tableView->edit(id); qDebug() << "row:" << r << " col:" << ec << "index:" << id; } my model creates an index like this QModelIndex TableModel::index(int row,int column,QModelIndex parent) const { Q_UNUSED(parent); return createIndex(row,column,0); } the debug output looks like this row: 9 col: 1 index: QModelIndex(9,1,0x0,TableModel(0xbf3f50) ) I'm fairly sure that the index is somehow invalid as setCurrentIndex doesn't seem to be working

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  • SqlBulkCopy slow as molasses

    - by Chris
    I'm looking for the fastest way to load bulk data via c#. I have this script that does the job but slow. I read testimonies that SqlBulkCopy is the fastest. 1000 records 2.5 seconds. files contain anywhere near 5000 records to 250k What are some of the things that can slow it down? Table Def: CREATE TABLE [dbo].[tempDispositions]( [QuotaGroup] [varchar](100) NULL, [Country] [varchar](50) NULL, [ServiceGroup] [varchar](50) NULL, [Language] [varchar](50) NULL, [ContactChannel] [varchar](10) NULL, [TrackingID] [varchar](20) NULL, [CaseClosedDate] [varchar](25) NULL, [MSFTRep] [varchar](50) NULL, [CustEmail] [varchar](100) NULL, [CustPhone] [varchar](100) NULL, [CustomerName] [nvarchar](100) NULL, [ProductFamily] [varchar](35) NULL, [ProductSubType] [varchar](255) NULL, [CandidateReceivedDate] [varchar](25) NULL, [SurveyMode] [varchar](1) NULL, [SurveyWaveStartDate] [varchar](25) NULL, [SurveyInvitationDate] [varchar](25) NULL, [SurveyReminderDate] [varchar](25) NULL, [SurveyCompleteDate] [varchar](25) NULL, [OptOutDate] [varchar](25) NULL, [SurveyWaveEndDate] [varchar](25) NULL, [DispositionCode] [varchar](5) NULL, [SurveyName] [varchar](20) NULL, [SurveyVendor] [varchar](20) NULL, [BusinessUnitName] [varchar](25) NULL, [UploadId] [int] NULL, [LineNumber] [int] NULL, [BusinessUnitSubgroup] [varchar](25) NULL, [FileDate] [datetime] NULL ) ON [PRIMARY] and here's the code private void BulkLoadContent(DataTable dt) { OnMessage("Bulk loading records to temp table"); OnSubMessage("Bulk Load Started"); using (SqlBulkCopy bcp = new SqlBulkCopy(conn)) { bcp.DestinationTableName = "dbo.tempDispositions"; bcp.BulkCopyTimeout = 0; foreach (DataColumn dc in dt.Columns) { bcp.ColumnMappings.Add(dc.ColumnName, dc.ColumnName); } bcp.NotifyAfter = 2000; bcp.SqlRowsCopied += new SqlRowsCopiedEventHandler(bcp_SqlRowsCopied); bcp.WriteToServer(dt); bcp.Close(); } }

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  • Separating arguments to a function, in locales with comma as decimal marker

    - by Chris Pousset
    In locales, e.g. French, with comma as decimal indicator (where "5,2" means five and two-tenths), how do users separate function arguments from each other? For example, in many programming/scripting languages, I could specify MAX(1.5, X) in a EN-US locale. How do you avoid the ambiguity between the comma as decimal indicator, and as argument separator? In particular, I'm interested in how software that's perceived as user-friendly in the foreign locale does it. Obviously, it's a no-brainer to say, "thou shalt use decimal POINTs", but that's not particularly "friendly".

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  • Java Future and infinite computation

    - by Chris
    I'm trying to optimize an (infinite) computation algorithm. I have an infinte Sum to calculate ( Summ_{n- infinity} (....) ) My idea was to create several threads using the Future < construct, then combine the intermediate results together. My problem hoewer is that I need a certain precision. So I need to constantly calculate the current result while other threads keep calculating. My question is: Is there some sort of result queue where each finished thread can put its results in, while a main thread can receive those results and then either lets the computation continues or terminate the whole ExecutorService? Any Help would really be appreciated! Thanks!

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  • Strange iPhone memory leak in xml parser

    - by Chris
    Update: I edited the code, but the problem persists... Hi everyone, this is my first post here - I found this place a great ressource for solving many of my questions. Normally I try my best to fix anything on my own but this time I really have no idea what goes wrong, so I hope someone can help me out. I am building an iPhone app that parses a couple of xml files using TouchXML. I have a class XMLParser, which takes care of downloading and parsing the results. I am getting memory leaks when I parse an xml file more than once with the same instance of XMLParser. Here is one of the parsing snippets (just the relevant part): for(int counter = 0; counter < [item childCount]; counter++) { CXMLNode *child = [item childAtIndex:counter]; if([[child name] isEqualToString:@"PRODUCT"]) { NSMutableDictionary *product = [[NSMutableDictionary alloc] init]; for(int j = 0; j < [child childCount]; j++) { CXMLNode *grandchild = [child childAtIndex:j]; if([[grandchild stringValue] length] > 1) { NSString *trimmedString = [[grandchild stringValue] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; [product setObject:trimmedString forKey:[grandchild name]]; } } // Add product to current category array switch (categoryId) { case 0: [self.mobil addObject: product]; break; case 1: [self.allgemein addObject: product]; break; case 2: [self.besitzeIch addObject: product]; break; case 3: [self.willIch addObject: product]; break; default: break; } [product release]; } } The first time, I parse the xml no leak shows up in instruments, the next time I do so, I got a lot of leaks (NSCFString / NSCFDictionary). Instruments points me to this part inside CXMLNode.m, when I dig into a leaked object: theStringValue = [NSString stringWithUTF8String:(const char *)theXMLString]; if ( _node->type != CXMLTextKind ) xmlFree(theXMLString); } return(theStringValue); I really spent a long time and tried multiple approaches to fix this, but to no avail so far, maybe I am missing something essential? Any help is highly appreciated, thank you!

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  • Compress file to bytes for uploading to SQL Server

    - by Chris
    I am trying to zip files to an SQL Server database table. I can't ensure that the user of the tool has write priveledges on the source file folder so I want to load the file into memory, compress it to an array of bytes and insert it into my database. This below does not work. class ZipFileToSql { public event MessageHandler Message; protected virtual void OnMessage(string msg) { if (Message != null) { MessageHandlerEventArgs args = new MessageHandlerEventArgs(); args.Message = msg; Message(this, args); } } private int sourceFileId; private SqlConnection Conn; private string PathToFile; private bool isExecuting; public bool IsExecuting { get { return isExecuting; } } public int SourceFileId { get { return sourceFileId; } } public ZipFileToSql(string pathToFile, SqlConnection conn) { isExecuting = false; PathToFile = pathToFile; Conn = conn; } public void Execute() { isExecuting = true; byte[] data; byte[] cmpData; //create temp zip file OnMessage("Reading file to memory"); FileStream fs = File.OpenRead(PathToFile); data = new byte[fs.Length]; ReadWholeArray(fs, data); OnMessage("Zipping file to memory"); MemoryStream ms = new MemoryStream(); GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true); zip.Write(data, 0, data.Length); cmpData = new byte[ms.Length]; ReadWholeArray(ms, cmpData); OnMessage("Saving file to database"); using (SqlCommand cmd = Conn.CreateCommand()) { cmd.CommandText = @"MergeFileUploads"; cmd.CommandType = CommandType.StoredProcedure; //cmd.Parameters.Add("@File", SqlDbType.VarBinary).Value = data; cmd.Parameters.Add("@File", SqlDbType.VarBinary).Value = cmpData; SqlParameter p = new SqlParameter(); p.ParameterName = "@SourceFileId"; p.Direction = ParameterDirection.Output; p.SqlDbType = SqlDbType.Int; cmd.Parameters.Add(p); cmd.ExecuteNonQuery(); sourceFileId = (int)p.Value; } OnMessage("File Saved"); isExecuting = false; } private void ReadWholeArray(Stream stream, byte[] data) { int offset = 0; int remaining = data.Length; float Step = data.Length / 100; float NextStep = data.Length - Step; while (remaining > 0) { int read = stream.Read(data, offset, remaining); if (read <= 0) throw new EndOfStreamException (String.Format("End of stream reached with {0} bytes left to read", remaining)); remaining -= read; offset += read; if (remaining < NextStep) { NextStep -= Step; } } } }

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  • AS3 - Can't access properties or methods of a MC child that has been added in script

    - by Chris
    Hi All - I am still a bit of a beginner at AS3, so bear with me, please. I have created a loop to instantiate tiles on a board. In the following example, "Gametiles" is an array containing objects of class "Tile" which is a class that extends MovieClip. "Game" is a MC that I added to the stage in the flash developing environment. for(var i:uint=0;i < Gametiles.length;i++){ var pulledTile = Gametiles[i]; var tilename:String = "I_Tile_" + pulledTile.grid_y + "_" + pulledTile.grid_x; var createdTile = new InteractiveTile(); pulledTile.addAnims(createdTile); Game.addChildAt(pulledTile, 0); Game.getChildAt(0).name = tilename; } The above code works - but with a tricky problem. If I did something like the following: trace(Game.I_Tile_1_3.x); I get "TypeError: Error #1010: A term is undefined and has no properties." However, I am able to access theses children in the following manner: var testing = Game.getChildByName("I_Tile_1_3") trace(testing.x); This method is a bit cumbersome though. I really don't want to have to create a var and call getChildByName every time I want to interact with these properties or methods. How can I set up these children so that I can access them directly without the extra steps?

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  • How to Make URLs clickable inside of UITableViewCell ?

    - by Chris
    I know how to use UIWebView and can invoke a WebView if it is associated with a specific button or UITableViewCell. What I am trying to achieve is to have a UITableViewCell with a chunk of text. That chunk of text might contain a URL. I want to make the URL into a clickable link and have that link open into a WebView. My thought so far has been that I need to detect a link and insert it as a UIButton within the cell... but I don't know if that is the right way to go about this. Any ideas or input would be much appreciated.

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  • How Can I Add a New Command to a Control's Event

    - by Chris
    Hi, thanks for taking a look at this question. I have been building an application (VB/WPF) following Josh Smith's example of an MVVM pattern: Click here to view My Views have Controls which trigger a Command upon an event, such as a button click and these are bound to properties in the ViewModel. My ViewModel exposes properties of type ICommand which invoke the appropriate methods. This has worked well, until now! I now want to use a Thumb Control to allow a user to move an object within a Canvas. I don't believe that the Thumb has a Command capability 'out of the box'. A Thumb raises a 'DragDelta' event when being moved. So my question is as follows: How do I extend a Control's capability to issue a Command upon an event please? I wish to issue a new Command, let's say 'onDragDelta' so that I can bind it to a property in my ViewModel just like my Buttons. Thank you very much

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  • Multiple calls to AlarmManager.setRepeating deliver the same Intent/PendingIntent extra values, but

    - by Chris Boyle
    Solved while writing this question, but posting in case it helps anyone: I'm setting multiple alarms like this, with different values of id: AlarmManager alarms = (AlarmManager)context.getSystemService( Context.ALARM_SERVICE); Intent i = new Intent(MyReceiver.ACTION_ALARM); // "com.example.ALARM" i.putExtra(MyReceiver.EXTRA_ID, id); // "com.example.ID", 2 PendingIntent p = PendingIntent.getBroadcast(context, 0, i, 0); alarms.setRepeating(AlarmManager.RTC_WAKEUP, nextMillis, 300000, p); // 5 mins ...and receiving them like this: public void onReceive(Context context, Intent intent) { if (intent.getAction().equals(ACTION_ALARM)) { // It's time to sound/show an alarm final long id = intent.getLongExtra(EXTRA_ID, -1); The alarm is delivered to my receiver at the right times, but often with EXTRA_ID set to the wrong value: it's a value that I have used at some point, just not the one that I wanted delivered at that particular time.

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  • Python - Get Instance Variables

    - by Chris Bunch
    Is there a built-in method in Python to get an array of all a class' instance variables? For example, if I have this code: class hi: def __init__(self): self.ii = "foo" self.kk = "bar" Is there a way for me to do this: >>> mystery_method(hi) ["ii", "kk"] Thanks guys! Edit: I originally had asked for class variables erroneously. Thanks to all who brought this to my attention!

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  • How do I write a prepared statement with an update?

    - by Chris
    I am using mysqli prepared statments and I am trying to write a prepared statement with an UPDATE, but I think I am off somewhere. Here's my code: $upload_folder = 'Some String'; $sql = 'UPDATE orders (upload_location) SET (?) WHERE order_id = 160'; $stmt = $conn->stmt_init(); if($stmt->prepare($sql)){ $stmt->bind_param('s', $upload_folder); $location_inserted = $stmt->execute(); } What am I doing wrong?

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  • Dojo dialog, the iPad and the virtual keyboard issue

    - by Chris Butler
    Recently, I have been working on a project where the interface should work for desktop and tablets (in particular the iPad). One issue I am coming across is with a Dojo dialog on the iPad when text entry is taking place. Basically here is what happens: Load Dojo interface with buttons on iPad - OK Press button (touch) to show dialog (90% height and width) - OK Click on text box (touch) like DateTextBox or TimeTextBox - OK, the virtual keyboard is opened Click the date or time I want in the UI (touch) - OK, but I can't see all of the options since it is longer than the screen size... Try to scroll down (swipe up with two fingers or click 'next' in the keyboard) - not OK and the dialog repositions itself to have it's top at the top of the viewport area. Basically, the issue is that the dialog keeps trying to reposition itself. Am I able to stop dialog resizing and positioning if I catch the window onResize events? Does anyone else have this issue with the iPad and Dojo dialogs? Also, I found this StackOverflow topic on detecting the virtual keyboard, but it wasn't much help in this case... http://stackoverflow.com/questions/2593139/ipad-web-app-detect-virtual-keyboard-using-javascript-in-safari Thanks!

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  • Equality with Double.NaN

    - by chris
    I have the following code... if (Price_Foreign != Double.NaN) { output.Append(spacer); output.Append(String.Format("{0,-10:C} USD",Price_Foreign)); } Which outputs: NaN USD What gives? I'm using Double.NaN to indicate that the value doesn't exist, and shouldn't be output.

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  • Get the XPath to an XElement?

    - by Chris
    I've got an XElement deep within a document. Given the XElement (and XDocument?), is there an extension method to get its full (i.e. absolute, e.g. /root/item/element/child) XPath? E.g. myXElement.GetXPath()? EDIT: Okay, looks like I overlooked something very important. Whoops! The index of the element needs to be taken into account. See my last answer for the proposed corrected solution.

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  • Emacs persistent folding mode

    - by Chris
    There are plenty of ways to fold code in Emacs and I've settled in on using the outline minor mode... it works great! However, I really want my folding to be persisted when I close and re-open files. It is quite frustrating to have folding set up in a file the way I like it, only to have that lost when I restart Emacs. Has anyone found a way to keep the folding state of a file persistent?

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