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• PHP5 vs ASP.NET

  - by Lee

  Hi guys, I am required to write a report contrasting PHP5 and ASP.NET after building an application in both languages. I've been looking for papers and resources to reference and quote on the subject but i am running a little short. I was wondering if anyone directions as where i could find such papers / resources. Thanks in advance.

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• c++ FFT Beat detection library?

  - by mokaschitta

  Hi, I am currently looking around for a good allround beat detection library / source code in C++ since I found it really hard to achieve satisfying results with the beat detection code I wrote myself using this tutorial: http://www.gamedev.net/reference/programming/features/beatdetection/ It's especially really hard if you want to make it work with any kind of music so I was wondering if there is something usable out there allready? Thanks!

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• how to add a new item to ebay using ebay API

  - by From.ME.to.YOU

  Hello i want to add an item to ebay using ebay API and PHP i read their website for hours and i'm lost. i created a developer account. but what should i do after that? i read about "Add item" call http://developer.ebay.com/DevZone/XML/docs/Reference/eBay/AddItem.html but i have no idea on how to use that? Please help !!

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• Python: Inheritance of a class attribute (list)

  - by Sano98

  Hi everyone, inheriting a class attribute from a super class and later changing the value for the subclass works fine: class Unit(object): value = 10 class Archer(Unit): pass print Unit.value print Archer.value Archer.value = 5 print Unit.value print Archer.value leads to the output: 10 10 10 5 which is just fine: Archer inherits the value from Unit, but when I change Archer's value, Unit's value remains untouched. Now, if the inherited value is a list, the shallow copy effect strikes and the value of the superclass is also affected: class Unit(object): listvalue = [10] class Archer(Unit): pass print Unit.listvalue print Archer.listvalue Archer.listvalue[0] = 5 print Unit.listvalue print Archer.listvalue Output: 10 10 5 5 Is there a way to "deep copy" a list when inheriting it from the super class? Many thanks Sano

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• Seeking for faster $.(':data(key)')

  - by PoltoS

  I'm writing an extension to jQuery that adds data to DOM elements using el.data('lalala', my_data); and then uses that data to upload elements dynamically. Each time I get new data from the server I need to update all elements having el.data('lalala') != null; To get all needed elements I use an extension by James Padolsey: $(':data(lalala)').each(...); Everything was great until I came to the situation where I need to run that code 50 times - it is very slow! It takes about 8 seconds to execute on my page with 3640 DOM elements var x, t = (new Date).getTime(); for (n=0; n < 50; n++) { jQuery(':data(lalala)').each(function() { x++; }); }; console.log(((new Date).getTime()-t)/1000); Since I don't need RegExp as parameter of :data selector I've tried to replace this by var x, t = (new Date).getTime(); for (n=0; n < 50; n++) { jQuery('*').each(function() { if ($(this).data('lalala')) x++; }); }; console.log(((new Date).getTime()-t)/1000); This code is faster (5 sec), but I want get more. Q Are there any faster way to get all elements with this data key? In fact, I can keep an array with all elements I need, since I execute .data('key') in my module. Checking 100 elements having the desired .data('lalala') is better then checking 3640 :) So the solution would be like for (i in elements) { el = elements[i]; .... But sometimes elements are removed from the page (using jQuery .remove()). Both solutions described above [$(':data(lalala)') solution and if ($(this).data('lalala'))] will skip removed items (as I need), while the solution with array will still point to removed element (in fact, the element would not be really deleted - it will only be deleted from the DOM tree - because my array will still have a reference). I found that .remove() also removes data from the node, so my solution will change into var toRemove = []; for (vari in elements) { var el = elements[i]; if ($(el).data('lalala')) .... else toRemove.push(i); }; for (var ii in toRemove) elements.splice(toRemove[ii], 1); // remove element from array This solution is 100 times faster! Q Will the garbage collector release memory taken by DOM elements when deleted from that array? Remember, elements have been referenced by DOM tree, we made a new reference in our array, then removed with .remove() and then removed from the array. Is there a better way to do this?

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• UpdatePanel, Repeater, DataBinding Problem

  - by Gordon Carpenter-Thompson

  In a user control, I've got a Repeater inside of an UpdatePanel (which id displayed inside of a ModalPopupExtender. The Repeater is databound using an array list of MyDTO objects. There are two buttons for each Item in the list. Upon binding the ImageURL and CommandArgument are set. This code works fine the first time around but the CommandArgument is wrong thereafter. It seems like the display is updated correctly but the DTO isn't and the CommandArgument sent is the one that has just been removed. Can anybody spot any problems with the code? ASCX <asp:UpdatePanel ID="ViewDataDetail" runat="server" ChildrenAsTriggers="true"> <Triggers> <asp:PostBackTrigger ControlID="ViewDataCloseButton" /> <asp:AsyncPostBackTrigger ControlID="DataRepeater" /> </Triggers> <ContentTemplate> <table width="100%" id="DataResults"> <asp:Repeater ID="DataRepeater" runat="server" OnItemCommand="DataRepeater_ItemCommand" OnItemDataBound="DataRepeater_ItemDataBound"> <HeaderTemplate> <tr> <th><b>Name</b></th> <th><b>&nbsp;</b></th> </tr> </HeaderTemplate> <ItemTemplate> <tr> <td> <b><%#((MyDTO)Container.DataItem).Name%></b> </td> <td> <asp:ImageButton CausesValidation="false" ID="DeleteData" CommandName="Delete" runat="server" /> <asp:ImageButton CausesValidation="false" ID="RunData" CommandName="Run" runat="server" /> </td> </tr> <tr> <td colspan="2"> <table> <tr> <td>Description : </td> <td><%#((MyDTO)Container.DataItem).Description%></td> </tr> <tr> <td>Search Text : </td> <td><%#((MyDTO)Container.DataItem).Text%></td> </tr> </table> </td> </tr> </ItemTemplate> </asp:Repeater> </table> </ContentTemplate> </asp:UpdatePanel> Code-Behind public DeleteData DeleteDataDelegate; public RetrieveData PopulateDataDelegate; public delegate ArrayList RetrieveData(); public delegate void DeleteData(String sData); protected void Page_Load(object sender, EventArgs e) { //load the initial data.. if (!Page.IsPostBack) { if (PopulateDataDelegate != null) { this.DataRepeater.DataSource = this.PopulateDataDelegate(); this.DataRepeater.DataBind(); } } } protected void DataRepeater_ItemCommand(object source, RepeaterCommandEventArgs e) { if (e.CommandName == "Delete") { if (DeleteDataDelegate != null) { DeleteDataDelegate((String)e.CommandArgument); BindDataToRepeater(); } } else if (e.CommandName == "Run") { String sRunning = (String)e.CommandArgument; this.ViewDataModalPopupExtender.Hide(); } } protected void DataRepeater_ItemDataBound(object source, RepeaterItemEventArgs e) { RepeaterItem item = e.Item; if (item != null && item.DataItem != null) { MyDTO oQuery = (MyDTO)item.DataItem; ImageButton oDeleteControl = (ImageButton) item.FindControl("DeleteData"); ImageButton oRunControl = (ImageButton)item.FindControl("RunData"); if (oDeleteControl != null && oRunControl !=null) { oRunControl.ImageUrl = "button_expand.gif"; oRunControl.CommandArgument = "MyID"; oDeleteControl.ImageUrl = "btn_remove.gif"; oDeleteControl.CommandArgument = "MyID"; } } } public void BindDataToRepeater() { this.DataRepeater.DataSource = this.PopulateDataDelegate(); this.DataRepeater.DataBind(); } public void ShowModal(object sender, EventArgs e) { BindDataToRepeater(); this.ViewDataModalPopupExtender.Show(); }

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• Sparse matrices / arrays in Java

  - by DanM

  I'm working on a project, written in Java, which requires that I build a very large 2-D sparse array. Very sparse, if that makes a difference. Anyway: the most crucial aspect for this application is efficency in terms of time (assume loads of memory, though not nearly so unlimited as to allow me to use a standard 2-D array -- the key range is in the billions in both dimensions). Out of the kajillion cells in the array, there will be several hundred thousand cells which contain an object. I need to be able to modify cell contents VERY quickly. Anyway: Does anyone know a particularly good library for this purpose? It would have to be Berkeley, LGPL or similar license (no GPL, as the product can't be entirely open-sourced). Or if there's just a very simple way to make a homebrew sparse array object, that'd be fine too. I'm considering MTJ, but haven't heard any opinions on its quality. Thanks!! -Dan

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• ASP .NET: SQL Server Money Type and .NET Currency Type

  - by Rudi Ramey

  MS SQL Server's Money Data Type seems to accept a well formatted currency value with no problem (example: $52,334.50) From my research MS SQL Sever just ignores the "$" and "," characters. ASP .NET has a parameter object that has a Type/DbType property and Currency is an available option to set as a value. However, when I set the parameter Type or DbType to currency it will not accept a value like $52,334.50. I receive an error "Input string was not in a correct format." when I try to Update/Insert. If I don't include the "$" or "," characters it seems to work fine. Also, if I don't specify the Type or DbType for the parameter it seems to work fine also. Is this just standard behavior that the parameter object with its Type set to currency will still reject "$" and "," characters in ASP .NET? Here's an example of the parameter declaration (in the .aspx page): <asp:Parameter Name="ImplementCost" DbType="Currency" />

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• Setting The Wallpaper On An IPad

  - by Anirudh

  I think there is no way to set the lock screen wallpaper on the iPhone programmatically (with ref to this question), but with the 3.2 SDK and the ability to set the wallpaper on the home screen on the iPad, does the SDK allow this to be done via APIs now? I looked up the developer reference, but i could not find anything useful.

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• UIViewController not loading a UIView

  - by Cosizzle

  Hey, I'm playing around with a script my teacher provided for a table based application. However I can't seem to get my own view to load. Files: SubViewOneController (which is a sub view, also has a nib) TapViewController (Custom UIView I created and want to add to a cell) RootViewController (Main controller which loads in the views) SimpleNavAppDelegate How it works: Within the RootViewController, there's an NSArray that holds NSDictionary objects which is declared in the -(void)awakeFromNib {} method - (void)awakeFromNib { // we'll keep track of our views controllers in this array views = [[NSMutableArray alloc] init]; // when using alloc you are responsible for it, and you will have to release it. // ==================================================================================================== // ==================================================================================================== // LOADING IN CUSTOM VIEW HERE: // allocate a set of views and add to our view array as a dictionary item TapViewController *tapBoardView = [[TapViewController alloc] init]; //push onto array [views addObject:[NSDictionary dictionaryWithObjectsAndKeys: @"Tab Gestures", @"title", tapBoardView, @"controller", nil]]; [tapBoardView release]; //release the memory // ==================================================================================================== // ==================================================================================================== SubViewOneController *subViewOneController = [[SubViewOneController alloc] init]; // This will set the 2nd level title subViewOneController.title = @"Swipe Gestures"; //set it's title //push it onto the array [views addObject:[NSDictionary dictionaryWithObjectsAndKeys: @"Swipe Gestures", @"title", subViewOneController, @"controller", nil]]; [subViewOneController release]; //release the memory } Later on I set the table view: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // OUTPUT -- see console NSLog(@"indexPath %i", indexPath.row); // OUTPUT: tapController: <TapViewController: 0x3b2b360> NSLog(@"view object: %@", [views objectAtIndex:indexPath.row]); // OUTPUT: view object: controller = <TapViewController: 0x3b0e290>; title = "Tab Gestures"; // ----- Hardcoding the controller and nib file in does work, so it's not a linkage issue ------ // UNCOMMENT TO SEE WORKING -- comment below section. //TapViewController *tapContoller = [[TapViewController alloc] initWithNibName:@"TapBoardView" bundle:nil]; //NSLog(@"tapController: %@", tapContoller); //[self.navigationController pushViewController:tapContoller animated:YES]; // ----- Random Tests ----- //UIViewController *targetViewController = [[views objectAtIndex: 0] objectForKey:@"controller"]; // DOES NOT WORK // LOADS THE SECOND CELL (SubViewOneController) however will not load (TapViewController) UIViewController *targetViewController = [[views objectAtIndex: indexPath.row] objectForKey:@"controller"]; NSLog(@"target: %@", targetViewController); // OUTPUT: target: <TapViewController: 0x3b0e290> [self.navigationController pushViewController:targetViewController animated:YES]; } Reading the comments you should be able to see that hardcoding the view in, works - however trying to load it from the View NSArray does not work. It does however contain the object in memory, seeing that NSLog proves that. Everything is linked up and working within the TapViewController nib file. So ya, im kinda stuck on this one, any help would be great! Thanks guys

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• How to add pdfsharp lib in C#

  - by Royson

  i am new to C#.net,i had downloaded pdfsharp lib. but how to add those lib in our project. My project is create a pdf file.Plz provide me step/step instruction. After unziping it has 32 folders. i tried by coping it in my pro folder. but same error come. "The type or namespace name 'PdfSharp' could not be found (are you missing a using directive or an assembly reference?)"

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• LazyInitializationException when adding to a list that is held within a entity class using hibernate

  - by molleman

  Right so i am working with hibernate gilead and gwt to persist my data on users and files of a website. my users have a list of file locations. i am using annotations to map my classes to the database. i am getting a org.hibernate.LazyInitializationException when i try to add file locations to the list that is held in the user class. this is a method below that is overridden from a external file upload servlet class that i am using. when the file uploads it calls this method. the user1 is loaded from the database elsewhere. the exception occurs at user1.getFileLocations().add(fileLocation); . i dont understand it really at all.! any help would be great. the stack trace of the error is below public String executeAction(HttpServletRequest request, List<FileItem> sessionFiles) throws UploadActionException { for (FileItem item : sessionFiles) { if (false == item.isFormField()) { try { YFUser user1 = (YFUser)getSession().getAttribute(SESSION_USER); // This is the location where a file will be stored String fileLocationString = "/Users/Stefano/Desktop/UploadedFiles/" + user1.getUsername(); File fl = new File(fileLocationString); fl.mkdir(); // so here i will create the a file container for my uploaded file File file = File.createTempFile("upload-", ".bin",fl); // this is where the file is written to disk item.write(file); // the FileLocation object is then created FileLocation fileLocation = new FileLocation(); fileLocation.setLocation(fileLocationString); //test System.out.println("file path = "+file.getPath()); user1.getFileLocations().add(fileLocation); //the line above is where the exception occurs } catch (Exception e) { throw new UploadActionException(e.getMessage()); } } removeSessionFileItems(request); } return null; } //This is the class file for a Your Files User @Entity @Table(name = "yf_user_table") public class YFUser implements Serializable,ILightEntity { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "user_id",nullable = false) private int userId; @Column(name = "username") private String username; @Column(name = "password") private String password; @Column(name = "email") private String email; @ManyToMany(cascade = CascadeType.ALL) @JoinTable(name = "USER_FILELOCATION", joinColumns = { @JoinColumn(name = "user_id") }, inverseJoinColumns = { @JoinColumn(name = "locationId") }) private List<FileLocation> fileLocations = new ArrayList<FileLocation>() ; public YFUser(){ } public int getUserId() { return userId; } private void setUserId(int userId) { this.userId = userId; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public List<FileLocation> getFileLocations() { if(fileLocations ==null){ fileLocations = new ArrayList<FileLocation>(); } return fileLocations; } public void setFileLocations(List<FileLocation> fileLocations) { this.fileLocations = fileLocations; } /* public void addFileLocation(FileLocation location){ fileLocations.add(location); }*/ @Override public void addProxyInformation(String property, Object proxyInfo) { // TODO Auto-generated method stub } @Override public String getDebugString() { // TODO Auto-generated method stub return null; } @Override public Object getProxyInformation(String property) { // TODO Auto-generated method stub return null; } @Override public boolean isInitialized(String property) { // TODO Auto-generated method stub return false; } @Override public void removeProxyInformation(String property) { // TODO Auto-generated method stub } @Override public void setInitialized(String property, boolean initialised) { // TODO Auto-generated method stub } @Override public Object getValue() { // TODO Auto-generated method stub return null; } } @Entity @Table(name = "fileLocationTable") public class FileLocation implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "locationId", updatable = false, nullable = false) private int ieId; @Column (name = "location") private String location; public FileLocation(){ } public int getIeId() { return ieId; } private void setIeId(int ieId) { this.ieId = ieId; } public String getLocation() { return location; } public void setLocation(String location) { this.location = location; } } Apr 2, 2010 11:33:12 PM org.hibernate.LazyInitializationException <init> SEVERE: failed to lazily initialize a collection of role: com.example.client.YFUser.fileLocations, no session or session was closed org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.example.client.YFUser.fileLocations, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365) at org.hibernate.collection.AbstractPersistentCollection.write(AbstractPersistentCollection.java:205) at org.hibernate.collection.PersistentBag.add(PersistentBag.java:297) at com.example.server.TestServiceImpl.saveFileLocation(TestServiceImpl.java:132) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at net.sf.gilead.gwt.PersistentRemoteService.processCall(PersistentRemoteService.java:174) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:713) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:324) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488) Apr 2, 2010 11:33:12 PM net.sf.gilead.core.PersistentBeanManager clonePojo INFO: Third party instance, not cloned : org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.example.client.YFUser.fileLocations, no session or session was closed

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• COM Interop error, class not registered when using MSMQ Library

  - by mattmck

  I've referenced the MSMQ v3 Object Library in a VS2010 C# project only to get: System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {0188401C-247A-4FED-99C6-BF14119D7055} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)). I've registered the library the reference points to: regsvr32 C:\windows\system32\mqoa.dll What am I missing? Assuming this works, what will I have to do at deployment to ensure the app will run on other machines with MSMQ installed?

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• Mastering CSharp.

  - by Subrat

  Hi All, Want to master CSharp. Know the basics though. Please name a few very good book to choose from. I have always loved the complete reference books. Is the one for CSharp is good? Thanks.

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• How to serialize and unserialize to/from a C# class?

  - by Earlz

  Hello, I have an object in Javascript that looks like this function MyObject(){ this.name=""; this.id=0; this..... } I then stringify an array of those objects and send it to an ASP.Net web service. Now what I want to do is do some processing on the JSON objects given to the webservice and return a JSON array of the same type of objects(same field names and such) How would I do this easily? I am using Netwonsoft.Json. Is there some way to turn a JSON string into a List or Array of an object?

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• Retrieve EF4 POCOs using WCF REST services starter kit

  - by muruge

  I am using WCF REST service (GET method) to retrieve my EF4 POCOs. The service seem to work just fine. When I query the uri in my browser I get the results as expected. In my client application I am trying to use WCF REST Starter Kit's HTTPExtension method - ReadAsDataContract() to convert the result back into my POCO. This works fine when the POCO's navigation property is a single object of related POCO. The problem is when the navigation property is a collection of related POCOs. The ReadAsDataContract() method throws an exception with message "Object reference not set to an instance of an object." Below are my POCOs. [DataContract(Namespace = "", Name = "Trip")] public class Trip { [DataMember(Order = 1)] public virtual int TripID { get; set; } [DataMember(Order = 2)] public virtual int RegionID { get; set; } [DataMember(Order = 3)] public virtual System.DateTime BookingDate { get; set; } [DataMember(Order = 4)] public virtual Region Region { // removed for brevity } } [DataContract(Namespace = "", Name = "Region")] public class Region { [DataMember(Order = 1)] public virtual int RegionID { get; set; } [DataMember(Order = 2)] public virtual string RegionCode { get; set; } [DataMember(Order = 3)] public virtual FixupCollection<Trip> Trips { // removed for brevity } } [CollectionDataContract(Namespace = "", Name = "{0}s", ItemName = "{0}")] [Serializable] public class FixupCollection<T> : ObservableCollection<T> { protected override void ClearItems() { new List<T>(this).ForEach(t => Remove(t)); } protected override void InsertItem(int index, T item) { if (!this.Contains(item)) { base.InsertItem(index, item); } } } And this is how I am trying retrieve a Region POCO. static void GetRegion() { string uri = "http://localhost:8080/TripService/Regions?id=1"; HttpClient client = new HttpClient(uri); using (HttpResponseMessage response = client.Get(uri)) { Region region; response.EnsureStatusIsSuccessful(); try { region = response.Content.ReadAsDataContract<Region>(); // this line throws exception because Region returns a collection of related trips Console.WriteLine(region.RegionName); } catch (Exception ex) { Console.WriteLine(ex.Message); } } } Would appreciate any pointers.

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• What does it take to prove this Contract.Requires?

  - by John Gietzen

  I have an application that runs through the rounds in a tournament, and I am getting a contract warning on this simplified code structure: public static void LoadState(IList<Object> stuff) { for(int i = 0; i < stuff.Count; i++) { // Contract.Assert(i < stuff.Count); // Contract.Assume(i < stuff.Count); Object thing = stuff[i]; Console.WriteLine(thing.ToString()); } } The warning is: contracts: requires unproven: index < @this.Count What am I doing wrong? How can I prove this on an IList<T>? Is this a bug in the static analyzer? How would I submit a bug report to Microsoft?

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• Load external image inside flash movie clip

  - by PepeSanchez

  I have a flash movie clip and need to load an external image inside the clip that reference to an external URL.. like www.myimage.com/image.jpg i did something with XML but the image persist on every clip because it loads from actionscript using the x and y cords. Help needed! Thanks!

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• DataGridView's SelectionChange event firing twice on DataBinding even after removing event binding

  - by Shantanu Gupta

  This Code triggers selection change event twice. how can I prevent it ? Currently i m using a flag or focused property to prevent this. But what is the actual way ? I am using it on winfoms EDIT My Mistake in writing Question, here is the correct code that i wanted to ask private void frmGuestInfo_Load(object sender, EventArgs e) { this.dgvGuestInfo.SelectionChanged -= new System.EventHandler(this.dgvGuestInfo_SelectionChanged); dgvGuestInfo.DataSource=dsFillControls.Tables["tblName"]; this.dgvGuestInfo.SelectionChanged += new System.EventHandler(this.dgvGuestInfo_SelectionChanged); } private void dgvGuestInfo_SelectionChanged(object sender, EventArgs e) { //this function is raised twice, i was expecting that this will not be raised }

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• How to get the Ansinerator library to work?

  - by konzepz

  I'm trying to get the Ansinerator library to work my on my localhost, but something's amiss. I'm receiving the following errors: Notice: Undefined index: hash in ansi.php on line 23 Notice: Undefined index: aml in ansi.php on line 37 Notice: Undefined variable: PNG_DESTRUCT in ansi.php on line 119 Notice: Undefined offset: -1 in ansi.php on line 362 Notice: Trying to get property of non-object in ansi.php on line 362 Notice: Undefined variable: links in ansi.php on line 459 Notice: Trying to get property of non-object in ansi.php on line 677 Notice: Undefined variable: links in ansi.php on line 459 Notice: Undefined variable: map_link in ansi.php on line 687 Any idea where am I going wrong with this one? I've installed the php-gd library, restarted the server, and while runs perfectly on production server, localhost will refuse. Ideas? Thank you.

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• Asynchronous sockets in C#

  - by IVlad

  I'm confused about the correct way of using asynchronous socket methods in C#. I will refer to these two articles to explain things and ask my questions: MSDN article on asynchronous client sockets and devarticles.com article on socket programming. My question is about the BeginReceive() method. The MSDN article uses these two functions to handle receiving data: private static void Receive(Socket client) { try { // Create the state object. StateObject state = new StateObject(); state.workSocket = client; // Begin receiving the data from the remote device. client.BeginReceive( state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state); } catch (Exception e) { Console.WriteLine(e.ToString()); } } private static void ReceiveCallback( IAsyncResult ar ) { try { // Retrieve the state object and the client socket // from the asynchronous state object. StateObject state = (StateObject) ar.AsyncState; Socket client = state.workSocket; // Read data from the remote device. int bytesRead = client.EndReceive(ar); if (bytesRead > 0) { // There might be more data, so store the data received so far. state.sb.Append(Encoding.ASCII.GetString(state.buffer,0,bytesRead)); // Get the rest of the data. client.BeginReceive(state.buffer,0,StateObject.BufferSize,0, new AsyncCallback(ReceiveCallback), state); } else { // All the data has arrived; put it in response. if (state.sb.Length > 1) { response = state.sb.ToString(); } // Signal that all bytes have been received. receiveDone.Set(); } } catch (Exception e) { Console.WriteLine(e.ToString()); } } While the devarticles.com tutorial passes null for the last parameter of the BeginReceive method, and goes on to explain that the last parameter is useful when we're dealing with multiple sockets. Now my questions are: What is the point of passing a state to the BeginReceive method if we're only working with a single socket? Is it to avoid using a class field? It seems like there's little point in doing it, but maybe I'm missing something. How can the state parameter help when dealing with multiple sockets? If I'm calling client.BeginReceive(...), won't all the data be read from the client socket? The devarticles.com tutorial makes it sound like in this call: m_asynResult = m_socClient.BeginReceive (theSocPkt.dataBuffer,0,theSocPkt.dataBuffer.Length, SocketFlags.None,pfnCallBack,theSocPkt); Data will be read from the theSocPkt.thisSocket socket, instead of from the m_socClient socket. In their example the two are one and the same, but what happens if that is not the case? I just don't really see where that last argument is useful or at least how it helps with multiple sockets. If I have multiple sockets, I still need to call BeginReceive on each of them, right?

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• ICommand.CanExecute being passed null even though CommandParameter is set...

  - by chaiguy

  I have a tricky problem where I am binding a ContextMenu to a set of ICommand-derived objects, and setting the Command and CommandParameter properties on each MenuItem via a style: <ContextMenu ItemsSource="{Binding Source={x:Static OrangeNote:Note.MultiCommands}}"> <ContextMenu.Resources> <Style TargetType="MenuItem"> <Setter Property="Header" Value="{Binding Path=Title}" /> <Setter Property="Command" Value="{Binding}" /> <Setter Property="CommandParameter" Value="{Binding Source={x:Static OrangeNote:App.Screen}, Path=SelectedNotes}" /> ... However, while ICommand.Execute( object ) gets passed the set of selected notes as it should, ICommand.CanExecute( object ) (which is called when the menu is created) is getting passed null. I've checked and the selected notes collection is properly instantiated before the call is made (in fact it's assigned a value in its declaration, so it is never null). I can't figure out why CanEvaluate is getting passed null.

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• Setting an asptextbox to read only from the code behind

  - by Anthony

  I need to change the readonly property of a asptextbox from the code behind based on certain conditions. I know how to run a function when the page loads, but I don't know how to reference the form fields to change the readonly property. Can anyone point me in the right direction? Thanks in advance, Anthony

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• RadGrid cannot pass sortExpression to ObjectDataSourceControl

  - by Jeff

  I have a Telerik RadGrid that bound to a datasource object. They are configured to support custom paging, sorting. For paging, only the data of a page is retrieved from the database. Before sorting, it works fine. The select method of the datasource is like public List<xxx> Select(string sortExpression, int maximumRows, int startRowIndex) {} Before sorting the sortExpression is empty, which is expected. But after use click sort, in the OnSortCommand event handler of Radgrid, the SortExpression is correct, indicating RadGrid has caputre user's sorting correctly. protected void OnSort(object source, GridSortCommandEventArgs e) { Console.WriteLine(e.SortExpression); // correct } But what is strange is that the RadGrid does not pass parameter to DataSource correctly this time. sortExpression is still empty, maximumRows became int.Max, and startRowIndex is 0. The the sorting in still render correctly, but grid ask datasource to get all data and do the sorting locally. Is this bug of RadGrid or my configuration is wrong?

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• Encrypt nsdata in iphone and decrypt it in php

  - by Gaurav Arora

  Hi All, I am new to Iphone development , I want to create an application in which I have to upload some data on php server using my Iphone application. For this I have an file on the Iphone whose content I have to upload on php server. For this I have converted the content of the file in NSData and now I want to encrypt this nsdata object and then pass it to the php server and on php server firstly I have to decrypt the nsdata object then I have to upload it on the server. But I am not able to find any way by which I can encrypt some data in Iphone app and then decrypt it in php. And also I want to compress the encrypted data before transferring it to php and then uncompress that data on php. The complete flow of my application is IPhone NSData -- Encrypted NsData -- Compressed Encrypted Data php Compressed Encrypted Data -- uncompressed encrypted data -- decrypted (original) NSData. Can some one help me how can I develop such application? Thanks in advance. Gaurav

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