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• Parallel port with C#

  - by Michael S.

  Hello, I am trying to send data to LPT1 port with a C# program, unfortunately with no success.. I am using windows 7 x64. I tried both x86 and x64 (inpoutx64.dll) dll's.. With the x64 dll when I send: Output(888, 255); It just continues the program as everything went ok, but i can't see anything on my multimeter (only the static 0.02V).. I also tried the following with C++: int main () { int val = 0; printf("Enter a value\n"); scanf("%d", &val); _outp(0x378, val); getchar(); _outp(0x378, 0); return 0; } But it throws an exception: Unhandled exception at 0x01281428 in ppac.exe: 0xC0000096: Privileged instruction. I remember once I made something like this work on xp, I hope it's possible on win7 too.. Please help me with this. Thanks.

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• displaying images in a list box so the image resizes based on parent container

  - by MikeU

  I have an expander with a list box in it that displays image thumbnails. I want the images to be sized according to the size of the listbox and the list box to be sized based on the width of the expander. When I expand the expander I want the list box and the images to resize also. Does anyone know how I can accomplish this? <Expander Style="{DynamicResource ExpanderStyle}" Name="pictureExpander" IsExpanded="True" ExpandDirection="Left" Collapsed="pictureExpander_Collapsed" Expanded="pictureExpander_Expanded" Grid.Column="4"> <ListBox Name="photoList" ItemsSource="{Binding Source={StaticResource PhotoBin}}" IsSynchronizedWithCurrentItem="True" HorizontalAlignment="Stretch" ScrollViewer.CanContentScroll="False"> <ListBox.ItemContainerStyle> <Style TargetType="{x:Type ListBoxItem}"> <Style.Resources> <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Yellow" /> </Style.Resources> <Style.Triggers> <Trigger Property="IsSelected" Value="True"> <Setter Property="BorderBrush" Value="Black"/> <Setter Property="BorderThickness" Value="5"/> </Trigger> </Style.Triggers> </Style> </ListBox.ItemContainerStyle> <ListBox.ItemTemplate> <DataTemplate> <Image Source="{Binding FileLocation}" Margin="0,5" HorizontalAlignment="Stretch" MouseLeftButtonDown="DragImage" /> </DataTemplate> </ListBox.ItemTemplate> </ListBox> </Expander>

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• String assembly by StringBuilder vs StringWriter and PrintWriter

  - by CPerkins

  I recently encountered an idiom I haven't seen before: string assembly by StringWriter and PrintWriter. I mean, I know how to use them, but I've always used StringBuilder. Is there a concrete reason for preferring one over the other? The StringBuilder method seems much more natural to me, but is it just style? I've looked at several questions here (including this one which comes closest: http://stackoverflow.com/questions/602279/stringwriter-or-stringbuilder ), but none in which the answers actually address the question of whether there's a reason to prefer one over the other for simple string assembly. This is the idiom I've seen and used many many times: string assembly by StringBuilder: public static String newline = System.getProperty("line.separator"); public String viaStringBuilder () { StringBuilder builder = new StringBuilder(); builder.append("first thing" + newline); builder.append("second thing" + newline); // ... several things builder.append("last thing" + newline); return builder.toString(); } And this is the new idiom: string assembly by StringWriter and PrintWriter: public String viaWriters() { StringWriter stringWriter = new StringWriter(); PrintWriter printWriter = new PrintWriter(stringWriter); printWriter.println("first thing"); printWriter.println("second thing"); // ... several things printWriter.println("last thing"); printWriter.flush(); printWriter.close(); return stringWriter.toString(); }

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• Selected Item in Dropdown Lists from Enum in ASP.net MVC

  - by AlexCuse

  Sorry if this is a dup, my searching turned up nothing. I am using the following method to generate drop down lists for enum types (lifted from here: http://addinit.com/?q=node/54): public static string DropDownList(this HtmlHelper helper, string name, Type type, object selected) { if (!type.IsEnum) throw new ArgumentException("Type is not an enum."); if(selected != null && selected.GetType() != type) throw new ArgumentException("Selected object is not " + type.ToString()); var enums = new List<SelectListItem>(); foreach (int value in Enum.GetValues(type)) { var item = new SelectListItem(); item.Value = value.ToString(); item.Text = Enum.GetName(type, value); if(selected != null) item.Selected = (int)selected == value; enums.Add(item); } return System.Web.Mvc.Html.SelectExtensions.DropDownList(helper, name, enums, "--Select--"); } It is working fine, except for one thing. If I give the dropdown list the same name as the property on my model the selected value is not set properly. Meaning this works: <%= Html.DropDownList("fam", typeof(EnumFamily), Model.Family)%> But this doesn't: <%= Html.DropDownList("family", typeof(EnumFamily), Model.Family)%> Because I'm trying to pass an entire object directly to the controller method I am posting to, I would really like to have the dropdown list named for the property on the model. When using the "right" name, the dropdown does post correctly, I just can't seem to set the selected value. I don't think this matters but I am running MVC 1 on mono 2.6

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• How can I use Convert.ChangeType to convert string into numerics with group separator?

  - by Loic

  Hello, I want to make a generic string to numeric converter, and provide it as a string extension, so I wrote the following code: public static bool TryParse<T>( this string text, out T result, IFormatProvider formatProvider ) where T : struct try { result = (T)Convert.ChangeType( text, typeof( T ), formatProvider ); return true; } catch(... I call it like this: int value; var ok = "123".TryParse(out value, NumberFormatInfo.CurrentInfo) It works fine until I want to use a group separator: As I live in France, where the thousand separator is a space and the decimal separator is a comma, the string "1 234 567,89" should be equals to 1234567.89 (in Invariant culture). But, the function crashes! When a try to perform a non generic conversion, like double.Parse(...), I can use an overload which accepts a NumberStyles parameter. I specify NumberStyles.Number and this time it works! So, the questions are : Why the parsing does not respect my NumberFormatInfo (where the NumberGroupSeparator is well specified to a space, as I specified in my OS) How could I make work the generic version with Convert.ChangeTime, as it has no overload wich accepts a NumberStyles parameter ?

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• Calling a method with an arg of Class<T> where T is a parameterized type

  - by Brian Ferris

  I'm attempting to call a constructor method that looks like: public static SomeWrapper<T> method(Class<T> arg); When T is an unparameterized type like String or Integer, calling is straightforward: SomeWrapper<String> wrapper = method(String.class); Things get tricky when T is a parameterized type like List<String>. The following is not valid: SomeWrapper<List<String>> wrapper = method(List<String>.class); About the only thing I could come up with is: List<String> o = new ArrayList<String>(); Class<List<String>> c = (Class<List<String>>) o.getClass(); SomeWrapper<List<String>> wrapper = method(c); Surely there is an easier way that doesn't require the construction of an additional object?

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• How to read a Website's Directory Structure using WMI and C# in IIS 6.0?

  - by Steve Johnson

  Hi all, I need to read a website's folders using WMI and C# in IIS 6.0. I am able to read the Virtual directories and applications using the "IISWebVirtualDirSetting" class. However the physical folders located inside a website cannot be read using this class. And for my case i need to read sub folders located within a website and later on set permission on them. For my requirement i dont need to work on Virtual Directories/Web Service Applications (which can be easily obtained using the code below..). I have tried to use IISWebDirectory class but it has been useful. Here is the code that reads IIS Virtual Directories... public static ArrayList RetrieveVirtualDirList(String ServerName, String WebsiteName) { ConnectionOptions options = SetUpAuthorization(); ManagementScope scope = new ManagementScope(string.Format(@"\\{0}\root\MicrosoftIISV2", ServerName), options); scope.Connect(); String SiteId = GetSiteIDFromSiteName(ServerName, WebsiteName); ObjectQuery OQuery = new ObjectQuery(@"SELECT * FROM IISWebVirtualDirSetting"); //ObjectQuery OQuery = new ObjectQuery(@"SELECT * FROM IIsSetting"); ManagementObjectSearcher WebSiteFinder = new ManagementObjectSearcher(scope, OQuery); ArrayList WebSiteListArray = new ArrayList(); ManagementObjectCollection WebSitesCollection = WebSiteFinder.Get(); String WebSiteName = String.Empty; foreach (ManagementObject WebSite in WebSitesCollection) { WebSiteName = WebSite.Properties["Name"].Value.ToString(); WebsiteName = WebSiteName.Replace("W3SVC/", ""); String extrctedSiteId = WebsiteName.Substring(0, WebsiteName.IndexOf('/')); String temp = WebsiteName.Substring(0, WebsiteName.IndexOf('/') + 1); String VirtualDirName = WebsiteName.Substring(temp.Length); WebsiteName = WebsiteName.Replace(SiteId, ""); if (extrctedSiteId.Equals(SiteId)) //if (true) { WebSiteListArray.Add(VirtualDirName ); //WebSiteListArray.Add(WebSiteName); //+ "|" + WebSite.Properties["Path"].Value.ToString() } } return WebSiteListArray; } Kindly help in this regard. Thanks you.

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• Creating generic list of instances of a class.

  - by Jim Branson

  I have several projects where I build a dictionary from a small class. I'm using C# 2008, Visual studio 2008 and .net 3.5 This is the code: namespace ReportsTest { class Junk { public static Dictionary<string, string> getPlatKeys() { Dictionary<string, string> retPlatKeys = new Dictionary<string, string>(); SqlConnection conn = new SqlConnection("Data Source=JB55LTARL;Initial Catalog=HldiReports;Integrated Security=True"); SqlDataReader Dr = null; conn.Open(); SqlCommand cmnd = new SqlCommand("SELECT Make, Series, RedesignYear, SeriesName FROM CompPlatformKeys", conn); Dr = cmnd.ExecuteReader(); while (Dr.Read()) { utypPlatKeys rec = new utypPlatKeys(Dr); retPlatKeys.Add(rec.Make + rec.Series + rec.RedesignYear, rec.SeriesName); } conn = null; Dr = null; return retPlatKeys; } } public class utypPlatKeys { public string Make { get; set; } public string Series { get; set; } public string RedesignYear { get; set; } public string SeriesName { get; set; } public utypPlatKeys(SqlDataReader dr) { this.Make = dr.GetInt16(dr.GetOrdinal("Make")).ToString("D3"); this.Series = dr.GetInt16(dr.GetOrdinal("Series")).ToString("D3"); this.RedesignYear = dr.GetInt16(dr.GetOrdinal("RedesignYear")).ToString(); this.SeriesName = dr["SeriesName"].ToString(); } } } The immediate window shows all of the entries in retPlatKeys and if you hover over retPlatKeys after loading it indicates the number of elements like this: "retPlatKeys| Count = 923 which is correct. I went to create a new project using this pattern only now the immediate window says retPlatKeys is out of scope and hovering over retPlatKeys after loading I get something like retPlatKeys|0x0000000002578900. Any help is greatly appreciated.

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• issue in ObservableCollection

  - by prince23

  hi, i have an lsit with these data i have a class called information.cs with these properties name,school, parent ex data name school parent kumar fes All manju fes kumar anu frank kumar anitha jss All rohit frank manju anill vijaya manju vani jss kumar soumya jss kumar madhu jss rohit shiva jss rohit vanitha jss anitha anu jss anitha now taking this as an input i wanted the output to be formated with a Hierarchical data when parent is all means it is the topmost level kumar fes All. what i need to do here is i need to create an object[0] and then check in list whether kumar exists as a parent in the list if it exista then add those items as under the object[0] as a parent i need to create one more oject under **manju fes kumar anu frank kumar** if you see this class file its shows how data is formatted. public class SampleProjectData { public static ObservableCollection GetSampleData() { DateTime dtS = DateTime.Now; ObservableCollection<Product> teams = new ObservableCollection<Product>(); teams.Add(new Product() { PDName = "Product1", OverallStartTime = dtS, OverallEndTime = dtS + TimeSpan.FromDays(3), }); Project emp = new Project() { PName = "Project1", OverallStartTime = dtS + TimeSpan.FromDays(1), OverallEndTime = dtS + TimeSpan.FromDays(6) }; emp.Tasks.Add(new Task() { StartTime = dtS, EndTime = dtS + TimeSpan.FromDays(2), TaskName = "John's Task 3" }); emp.Tasks.Add(new Task() { StartTime = dtS + TimeSpan.FromDays(3), EndTime = dtS + TimeSpan.FromDays(4), TaskName = "John's Task 2" }); teams[0].Projects.Add(emp); } return teams; }

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• .NET 4 RTM MetadataType attribute ignored when using Validator

  - by bart

  I am using VS 2010 RTM and trying to perform some basic validation on a simple type using MetadataTypeAttribute. When I put the validation attribute on the main class, everything works. However, when I put it on the metadata class, it seems to be ignored. I must be missing something trivial, but I've been stuck on this for a while now. I had a look at the Enterprise Library validation block as a workaround, but it doesn't support validation of single properties out of the box. Any ideas? class Program { static void Main(string[] args) { Stuff t = new Stuff(); try { Validator.ValidateProperty(t.X, new ValidationContext(t, null, null) { MemberName = "X" }); Console.WriteLine("Failed!"); } catch (ValidationException) { Console.WriteLine("Succeeded!"); } } } [MetadataType(typeof(StuffMetadata))] public class Stuff { //[Required] //works here public string X { get; set; } } public class StuffMetadata { [Required] //no effect here public string X { get; set; } }

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• UISearchDisplayController "shouldReloadTableForSearchString return NO" reloads table

  - by Jeena

  Why does my UISearchDisplayController show "No results" even if the shouldReloadTableForSearchString method returns NO? Shouldn't it just do nothing and stay black? How can I prevent it from doing so? #import "RootViewController.h" #pragma mark Table view methods - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } // Customize the number of rows in the table view. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (tableView == self.searchDisplayController.searchResultsTableView) { return 0; } return 10; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. cell.textLabel.text = [NSString stringWithFormat:@"row %d", indexPath.row]; return cell; } #pragma mark SearchController stuff - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString { return NO; } - (void)dealloc { [super dealloc]; } @end

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• Cannot convert IAsyncResult to AsyncResult when using a service refrence

  - by Scott Chamberlain

  I have a WCF service running, I added a reference to the service by using Add Service Reference in the solution explorer, and I checked the box for create asynchronous operations. My call works fine, I have a two way channel that reports back some events from the server and I am receiving the events. However, when the asynchronous task finishes in my callback handeler I get the error Unable to cast object of type 'SendAsyncResult' to type 'System.Runtime.Remoting.Messaging.AsyncResult'. Code that calls the method. DatabaseManagement.DatabaseManagementClient d = new DatabaseManagement.DatabaseManagementClient(new InstanceContext(new DatabaseManagementCallback())); d.Open(); d.BeginCreateDatabase("", "PreConfSA", "_test", new AsyncCallback(BeginCreateDatabaseCallback), null); The Async callback static void BeginCreateDatabaseCallback(IAsyncResult ar) { AsyncResult result = (AsyncResult)ar; //Execption happens here DatabaseManagement.DatabaseManagementClient caller = (DatabaseManagement.DatabaseManagementClient)result.AsyncDelegate; Console.WriteLine(caller.EndCreateDatabase(ar)); //Do more stuff here } Execption Details System.InvalidCastException was unhandled by user code Message=Unable to cast object of type 'SendAsyncResult' to type 'System.Runtime.Remoting.Messaging.AsyncResult'. Source=Sandbox Console StackTrace: at Sandbox_Console.Program.BeginCreateDatabaseCallback(IAsyncResult ar) in E:\Visual Studio 2010\Projects\Sandbox Console\Program.cs:line 26 at System.ServiceModel.AsyncResult.Complete(Boolean completedSynchronously) InnerException: I don't really need the result from the EndCreateDatabase but everywhere I read it says that you must call EndYouFunctionHere() or bad things happen. Any recomendations?

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• Checking if a RoutedEvent has any handlers

  - by AK

  I've got a custom Button class, that always performs the same action when it gets clicked (opening a specific window). I'm adding a Click event that can be assigned in the button's XAML, like a regular button. When it gets clicked, I want to execute the Click event handler if one has been assigned, otherwise I want to execute the default action. The problem is that there's apparently no way to check if any handlers have been added to an event. I thought a null check on the event would do it: if (Click == null) { DefaultClickAction(); } else { RaiseEvent(new RoutedEventArgs(ClickEvent, this));; } ...but that doesn't compile. The compiler tells me that I can't do anything other than += or -= to an event outside of the defining class, event though I'm trying to do this check INSIDE the defining class. I've implemented the correct behavior myself, but it's ugly and verbose and I can't believe there isn't a built-in way to do this. I must be missing something. Here's the relevant code: public class MyButtonClass : Control { //... public static readonly RoutedEvent ClickEvent = EventManager.RegisterRoutedEvent("Click", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(MyButtonClass)); public event RoutedEventHandler Click { add { ClickHandlerCount++; AddHandler(ClickEvent, value); } remove { ClickHandlerCount--; RemoveHandler(ClickEvent, value); } } private int ClickHandlerCount = 0; private Boolean ClickHandlerExists { get { return ClickHandlerCount > 0; } } //... }

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• Java RMI AccessControlException: access denied

  - by Gwilym

  Hey im getting a AccessControlException: access denied when attempting to start up a RMI app im writing, I cant work out why I get this exception if I open it on the default port 1099, or on another dynamic port, my policy file currently grants everything (will change when app is finished). I am stuck as to where It is going wrong, any help would but of great use My code public class Main { /** * @param args the command line arguments */ public static void main(String[] args) throws RemoteException, AlreadyBoundException, MalformedURLException { if (System.getSecurityManager() == null) { System.setSecurityManager ( new RMISecurityManager() ); } CreditCardServer ccs = new CreditCardServer(); int port = 1099; try { port = Integer.valueOf(args[0]); } catch (Exception e) { System.out.println("Invlaid Port"); } if (((port <= 65535) && (port >= 49152)) || port ==1099) { System.out.println("Valid Port"); } else { port = 1099; System.out.println("Port not in Dynamic Range 49152<-->65535"); } System.out.println(port); LocateRegistry.createRegistry(port); LocateRegistry.getRegistry().bind("CreditCardServer", ccs); while (true) { //hum? } } } The Stack Trace vega3 [ia32.linux] 23% java -Djava.security.policy=wideopen.policy -jar "BookStore-CreditCardServer.jar 65000" Valid Port 65000 Exception in thread "main" java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:342) at java.security.AccessController.checkPermission(AccessController.java:553) at java.lang.SecurityManager.checkPermission(SecurityManager.java:549) at java.lang.SecurityManager.checkConnect(SecurityManager.java:1051) at java.net.Socket.connect(Socket.java:536) at java.net.Socket.connect(Socket.java:492) at java.net.Socket.<init>(Socket.java:389) at java.net.Socket.<init>(Socket.java:203) at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146) at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340) at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source) at bookstorecreditcardserver.Main.main(Main.java:56) My Policy File grant { // Allow everything for now permission java.security.AllPermission; };

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• -[CFString length]: message sent to deallocated instance 0x3881940 when i scroll to near the bottom

  - by James

  Hey guys, i've got a problem debugging an iphone app that i'm attempting to write and it's got me stumped, bear with me, i'm a n00b to programming and might get some of the terminology wrong but i'll try to explain it as best as i can. The app gets an XML doc from the a web site, parses it into an array, and then displays it in a table view, i have the parser in a separate file. The ViewDidLoad in RootViewController sends it a url, the parser goes to work and then returns an NSMutableArray. When i run the app it works fine with small XML files (5 entries or so, and 1-3 sections), but when i use a larger one(20+ rows, over 12 sections) i get the error "-[CFString length]: message sent to deallocated instance 0x3881940" when i scroll near the bottom of the tableview, just as the last section title is about to come onto the viewable area on the screen to be precise. if i return a static string instead of the object in my array in this method it doesn't crash, but i can use NSLog to call the array and it returns the title no problems. - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)indexPath { return [[returnedEvents objectAtIndex:indexPath ] objectAtIndex:0]; } The returnedEvents array isn't released until -(void) dealloc {} I have read a few other posts on here, and a few guides on debugging and as of yet am unable to find anything that was able to help me, i'd be more than happy to post some code up here and any more information, i'm just not sure where to start... Thanks in advance for anyone willing to have a go at helping me out.

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• Emphasized text in docbook, fo, pdf out put.

  - by Mica

  I am trying to emphasize a character of some static text to render into the footer of my pdf, but can't figure out the right combination of tags in my xsl. How can I accomplish this? Example: <!-- Footer content --> <xsl:template name="footer.content"> <xsl:param name="pageclass" select="''"/> <xsl:param name="sequence" select="''"/> <xsl:param name="position" select="''"/> <xsl:param name="gentext-key" select="''"/> <fo:block> <xsl:choose> ... <xsl:when test="$sequence = 'odd' and $position = 'left'"> <xsl:text>&#x00A9;<emphasis>My</emphasis>Company</xsl:text> </xsl:when> ... </xsl:choose> </fo:block> </xsl:template> This example generates an error in xsltproc. Help!

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• Ninject 2 + ASP.NET MVC 2 Binding Types from External Assemblies

  - by Malkier

  Hi, I'M just trying to get started with Ninject 2 and ASP.NET MVC 2. I have followed this tutorial http://www.craftyfella.com/2010/02/creating-aspnet-mvc-2-controller.html to create a Controller Factory with Ninject and to bind a first abstract to a concrete implementation. Now I want to load a repository type from another assembly (where my concrete SQL Repositories are located) and I just cant get it to work. Here's my code: Global.asax.cs protected void Application_Start() { AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); ControllerBuilder.Current.SetControllerFactory(new MyControllerFactory()); } Controller Factory: public class Kernelhelper { public static IKernel GetTheKernel() { IKernel kernel = new StandardKernel(); kernel.Load(System.Reflection.Assembly.Load("MyAssembly")); return kernel; } } public class MyControllerFactory : DefaultControllerFactory { private IKernel kernel = Kernelhelper.GetTheKernel(); protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType) { return controllerType == null ? null : (IController)kernel.Get(controllerType); } } In "MyAssembly" there is a Module: public class ExampleConfigModule : NinjectModule { public override void Load() { Bind<Domain.CommunityUserRepository>().To<SQLCommunityUserRepository>(); } } Now when I just slap in a MockRepository object in my entry point it works just fine, the controller, which needs the repository, works fine. The kernel.Load(System.Reflection.Assembly.Load("MyAssembly")); also does its job and registers the module but as soon as I call on the controller which needs the repository I get an ActivationException from Ninject: No matching bindings are available, and the type is not self-bindable. Activation path: 2) Injection of dependency CommunityUserRepository into parameter _rep of constructor of type AccountController 1) Request for AccountController Can anyone give me a best practice example for binding types from external assemblies (which really is an important aspect of Dependency Injection)? Thank you!

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• Java how can I add an accented "e" to a string?

  - by behrk2

  Hello, With the help of tucuxi from the existing post Java remove HTML from String without regular expressions I have built a method that will parse out any basic HTML tags from a string. Sometimes, however, the original string contains html hexadecimal characters like é (which is an accented e). I have started to add functionality which will translate these escaped characters into real characters. You're probably asking: Why not use regular expressions? Or a third party library? Unfortunately I cannot, as I am developing on a BlackBerry platform which does not support regular expressions and I have never been able to successfully add a third party library to my project. So, I have gotten to the point where any é is replaced with "e". My question now is, how do I add an actual 'accented e' to a string? Here is my code: public static String removeHTML(String synopsis) { char[] cs = synopsis.toCharArray(); String sb = new String(); boolean tag = false; for (int i = 0; i < cs.length; i++) { switch (cs[i]) { case '<': if (!tag) { tag = true; break; } case '>': if (tag) { tag = false; break; } case '&': char[] copyTo = new char[7]; System.arraycopy(cs, i, copyTo, 0, 7); String result = new String(copyTo); if (result.equals("&#x00E9")) { sb += "e"; } i += 7; break; default: if (!tag) sb += cs[i]; } } return sb.toString(); } Thanks!

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• Enum "does not have a no-arg default constructor" with Jaxb and cxf

  - by Dave

  A client is having an issue running java2ws on some of their code, which uses & extends classes that are consumed from my SOAP web services. Confused yet? :) I'm exposing a SOAP web service (JBoss5, Java 6). Someone is consuming that web service with Axis1 and creating a jar out of it with the data types and client stubs. They are then defining their own type, which extends one of my types. My type contains an enumeration. class MyParent { private MyEnumType myEnum; // getters, settters for myEnum; } class TheirChild extends MyParent { ... } When they are running java2ws on their code (which extends my class), they get Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 2 counts of IllegalAnnotationExceptions net.foo.bar.MyEnuMType does not have a no-arg default constructor. this problem is related to the following location: at net.foo.bar.MyEnumType at public net.foo.bar.MyEnumType net.foo.bar.MyParent.getMyEnum() The enum I've defined is below. This is now how it comes out after being consumed, but it's how I have it defined on the app server: @XmlType(name = "MyEnumType") @XmlEnum public enum MyEnumType { Val1("Val1"), Val2("Val2") private final String value; MyEnumType(String v) { value = v; } public String value() { return value; } public static MyEnumType fromValue(String v) { if (v == null || v.length() == 0) { return null; } if (v.equals("Val1")) { return MyEnumType.Val1; } if (v.equals("Val2")) { return MyEnumType.Val2; } return null; } } I've seen things online and other posts, like (this one) regarding Jaxb's inability to handle Lists or things like that, but I'm baffled about my enum. I'm pretty sure you can't have a default constructor for an enum (well, at least a public no-arg constructor, Java yells at me when I try), so I'm not sure what makes this error possible. Any ideas? Also, the "2 counts of IllegalAnnotationsExceptions" may be because my code actually has two enums that are written similarly, but I left them out of this example for brevity.

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• Problem with XElement and XslCompiledTransform

  - by Graham Clark

  I'm having some trouble using a combination of XElement and XslCompiledTransform. I've put the sample code I'm using below. If I get my input XML using the GetXmlDocumentXml() method, it works fine. If I use the GetXElementXml() method instead, I get an InvalidOperationException when calling the Transform method of XslComiledTransform: Token Text in state Start would result in an invalid XML document. Make sure that the ConformanceLevel setting is set to ConformanceLevel.Fragment or ConformanceLevel.Auto if you want to write an XML fragment. The CreateNavigator method on both XElement and XmlDocument returns an XPathNavigator. What extra stuff is XmlDocument doing so this all works, and how can I do the same with XElement? Am I just doing something insane? static void Main(string[] args) { XslCompiledTransform stylesheet = GetStylesheet(); // not shown for brevity IXPathNavigable input = this.GetXElementXml(); using (MemoryStream ms = this.TransformXml(input, stylesheet)) { XmlReader xr = XmlReader.Create(ms); xr.MoveToContent(); } } private MemoryStream TransformXml( IXPathNavigable xml, XslCompiledTransform stylesheet) { MemoryStream transformed = new MemoryStream(); XmlWriter writer = XmlWriter.Create(transformed); stylesheet.Transform(xml, null, writer); transformed.Position = 0; return transformed; } private IXPathNavigable GetXElementXml() { var xml = new XElement("x", new XElement("y", "sds")); return xml.CreateNavigator(); } private IXPathNavigable GetXmlDocumentXml() { var xml = new XmlDocument(); xml.LoadXml("<x><y>sds</y></x>"); return xml.CreateNavigator(); }

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• Performance penalty of typecasting and boxing/unboxing types in C# when storing generic values

  - by kitsune

  I have a set-up similar to WPF's DependencyProperty and DependencyObject system. My properties however are generic. A BucketProperty has a static GlobalIndex (defined in BucketPropertyBase) which tracks all BucketProperties. A Bucket can have many BucketProperties of any type. A Bucket saves and gets the actual values of these BucketProperties... now my question is, how to deal with the storage of these values, and what is the penalty of using a typecasting when retrieving them? I currently use an array of BucketEntries that save the property values as simple objects. Is there any better way of saving and returning these values? Beneath is a simpliefied version: public class BucketProperty<T> : BucketPropertyBase { } public class Bucket { private BucketEntry[] _bucketEntries; public void SaveValue<T>(BucketProperty<T> property, T value) { SaveBucketEntry(property.GlobalIndex, value) } public T GetValue<T>(BucketProperty<T> property) { return (T)FindBucketEntry(property.GlobalIndex).Value; } } public class BucketEntry { private object _value; private uint _index; public BucketEntry(uint globalIndex, object value) { ... } }

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• user input question

  - by jdbeverly87

  My program checks to test if a word or phrase is a palindrome (reads the same both backward and forward, ex "racecar"). The issue I'm having is after someone enters in "racecar" getting it to actually test. In the below code, I marked where if I type in "racecar" and run, Java returns the correct answer so I know I'm right there. But what am I missing as far as entering it into the console. I think my code is ok, but maybe I have something missing or in the wrong spot? Not really looking for a new answer unless I'm missing something, but if possible perhaps a pro at this moving my code to the correct area bc I'm stuck! `import java.util.*; public class Palindrome { public static void main(String[] args) { String myInput; Scanner in = new Scanner(System.in); System.out.println("Enter a word or phrase: "); **//this asks user for input but doesn't check for whether or not it is a palindrome** myInput = in.nextLine(); in.close(); System.out.println("You entered: " + myInput); } { String s="racecar"; **//I can type a word here and it works but I need** int i; **//I need it to work where I ask for the input** int n=s.length(); String str=""; for(i=n-1;i>=0;i--) str=str+s.charAt(i); if(str.equals(s)) System.out.println(s+ " is a palindrome"); else System.out.println(s+ " is not a palindrome"); } }` I'm new at programming so I'm hoping what I got is ok. I know the palindrome test works I'm just needing helping having it test thru where I'm entering it into the console. Thanks

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• Using ASP .NET Membership and Profile with MVC, how can I create a user and set it to HttpContext.Cu

  - by Jeremy Gruenwald

  I've read the other questions on the topic of MVC membership and profiles, but I'm missing something. I implemented a custom Profile object in code as described by Joel here: http://stackoverflow.com/questions/426609/asp-net-membership-how-to-assign-profile-values I can't get it to work when I'm creating a new user, however. When I do this: Membership.CreateUser(userName, password); Roles.AddUserToRole(userName, "MyRole"); the user is created and added to a role in the database, but HttpContext.Current.User is still empty, and Membership.GetUser() returns null, so this (from Joel's code) doesn't work: static public AccountProfile CurrentUser { get { return (AccountProfile) (ProfileBase.Create(Membership.GetUser().UserName)); } } AccountProfile.CurrentUser.FullName = "Snoopy"; I've tried calling Membership.GetUser(userName) and setting Profile properties that way, but the set properties remain empty, and calling AccountProfile.CurrentUser(userName).Save() doesn't put anything in the database. I've also tried indicating that the user is valid & logged in, by calling Membership.ValidateUser, FormsAuthentication.SetAuthCookie, etc., but the current user is still null or anonymous (depending on the state of my browser cookies). I have the feeling I'm missing some essential piece of understanding about how Membership, Authentication, and Profiles fit together. Do I have to do a round trip before the current User will be populated? Any advice would be much appreciated.

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• LINQ(2 SQL) Insert Multiple Tables Question

  - by Refracted Paladin

  I have 3 tables. A primary EmploymentPlan table with PK GUID EmploymentPlanID and 2 FK's GUID PrevocServicesID & GUID JobDevelopmentServicesID. There are of course other fields, almost exclusively varchar(). Then the 2 secondary tables with the corresponding PK to the primary's FK's. I am trying to write the LINQ INSERT Method and am struggling with the creation of the keys. Say I have a method like below. Is that correct? Will that even work? Should I have seperate methods for each? Also, when INSERTING I didn't think I needed to provide the PK for a table. It is auto-generated, no? Thanks, public static void InsertEmploymentPlan(int planID, Guid employmentQuestionnaireID, string user, bool communityJob, bool jobDevelopmentServices, bool prevocServices, bool transitionedPrevocIntegrated, bool empServiceMatchPref) { using (var context = MatrixDataContext.Create()) { var empPrevocID = Guid.NewGuid(); var prevocPlan = new tblEmploymentPrevocService { EmploymentPrevocID = empPrevocID }; context.tblEmploymentPrevocServices.InsertOnSubmit(prevocPlan); var empJobDevID = Guid.NewGuid(); var jobDevPlan = new tblEmploymentJobDevelopmetService() { JobDevelopmentServicesID = empJobDevID }; context.tblEmploymentJobDevelopmetServices.InsertOnSubmit(jobDevPlan); var empPlan = new tblEmploymentQuestionnaire { CommunityJob = communityJob, EmploymentQuestionnaireID = Guid.NewGuid(), InsertDate = DateTime.Now, InsertUser = user, JobDevelopmentServices = jobDevelopmentServices, JobDevelopmentServicesID =empJobDevID, PrevocServices = prevocServices, PrevocServicesID =empPrevocID, TransitionedPrevocToIntegrated =transitionedPrevocIntegrated, EmploymentServiceMatchPref = empServiceMatchPref }; context.tblEmploymentQuestionnaires.InsertOnSubmit(empPlan); context.SubmitChanges(); } } I understand I can use more then 1 InsertOnSubmit, See SO ? HERE, I just don't understand how that would apply to my situation and the PK/FK creation.

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• Extracting URIs from RDF web page in Java using Jena Library

  - by Prannoy Mittal

  I have written following code for extratcting URIs from a web page with content type application/rdf-xml for Linked Data application. public static void test(String url) { try { Model read = ModelFactory.createDefaultModel().read(url); System.out.println("to go"); StmtIterator si; si = read.listStatements(); System.out.println("to go"); while(si.hasNext()) { Statement s=si.nextStatement(); Resource r=s.getSubject(); Property p=s.getPredicate(); RDFNode o=s.getObject(); System.out.println(r.getURI()); System.out.println(p.getURI()); System.out.println(o.asResource().getURI()); } } catch(JenaException | NoSuchElementException c) { } } But above code is not extracting all URIs. It provides only few of the URIs. Please guide me where i Went wrong?? hey Rafeel For Eq: for XML File : <?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ex="http://example.org/stuff/1.0/"> <rdf:Description rdf:about="http://www.w3.org/TR/rdf-syntax-grammar" dc:title="RDF/XML Syntax Specification (Revised)"> <ex:editor> <rdf:Description ex:fullName="Dave Beckett"> <ex:homePage rdf:resource="http://purl.org/net/dajobe/" /> </rdf:Description> </ex:editor> </rdf:Description> </rdf:RDF> The output is : Subject URI is http://www.w3.org/TR/rdf-syntax-grammar Predicate URI is http://example.org/stuff/1.0/editor Object URI is null Subject URI is http://www.w3.org/TR/rdf-syntax-grammar Predicate URI is http://purl.org/dc/elements/1.1/title Website is read

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