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  • LINQ to Entities Projection of Nested List

    - by Matthew
    Assuming these objects... class MyClass { int ID {get;set;} string Name {get;set;} List<MyOtherClass> Things {get;set;} } class MyOtherClass { int ID {get;set;} string Value {get;set;} } How do I perform a LINQ to Entities Query, using a projection like below, that will give me a List? This works fine with an IEnumerable (assuming MyClass.Things is an IEnumerable, but I need to use List) MyClass myClass = (from MyClassTable mct in this.Context.MyClassTableSet select new MyClass { ID = mct.ID, Name = mct.Name, Things = (from MyOtherClass moc in mct.Stuff where moc.IsActive select new MyOtherClass { ID = moc.ID, Value = moc.Value }).AsEnumerable() }).FirstOrDefault(); Thanks in advance for the help!

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  • create a wav file from multiple wav files in delphi

    - by Bayu
    i' ve a problem in doing my final project... i'm having trouble with how to save multiple wav files into 1 wav file.. let's take an example: i have 3 wav files which are the syllables of the word "hospital" : "hos.wav", "pi.wav", and "tal.wav" (sorry if i'm wrong in determining the syllables of the words).. each of those syllable wav files contains utterances of the syllables of the word "hospital" respectively.. my task is to merge those files so that the word hospital could be reproduced from those files. and then to save the merged file to be a new wav file, let say "hospital.wav"..I've done my first task, but not with my second task... does anyone can help me? thx b4..

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  • SQL: Return "true" if list of records exists?

    - by User
    An alternative title might be: Check for existence of multiple rows? Using a combination of SQL and C# I want a method to return true if all products in a list exist in a table. If it can be done in all in SQL that would be preferable. I have written a method that returns whether a single productID exists using the following SQL: SELECT productID FROM Products WHERE ProductID = @productID If this returns a row, then the c# method returns true, false otherwise. Now I'm wondering if I have a list of product IDs (not a huge list mind you, normally under 20). How can I write a query that will return a row if all the product id's exist and no row if one or more product id's does not exist? (Maybe something involving "IN" like: SELECT * FROM Products WHERE ProductID IN (1, 10, 100))

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  • HashSet vs. List performance

    - by Michael Damatov
    It's clear that a search performance of the generic HashSet<T> class is higher than of the generic List<T> class. Just compare the hash-based key with the linear approach in the List<T> class. However calculating a hash key may itself take some CPU cycles, so for a small amount of items the linear search can be a real alternative to the HashSet<T>. My question: where is the break-even? To simplify the scenario (and to be fair) let's assume that the List<T> class uses the element's Equals() method to identify an item.

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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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  • Class Design - Returning a List<Object> From <Object>

    - by Mike
    Given a simple class: public class Person { public string FirstName; public string LastName; public string GetFullName() { return FirstName + LastName; } } The user of this class will populate a List<Person> object by reading an Xml file or some other data source. Should the logic for populating the List be in the Person class or should it just remain in the calling class? In other words, should there be a public List<Persons> GetPersons() method in the Person class or in the calling class? Or should the data accessor be in another class altogether? I know this is a rather simplistic question but I'm just curious how others typically do it.

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  • SSIS- Sharepoint list data transfer issue

    - by Vicky
    Hi , We are trying to transfer data from oracle database (about 60,0000) records only to a sharepoint list using SSIS. But we are getting following error when records reaches around 19000 . The attempt to add a row to the Data Flow task buffer failed with error code 0xC0047020 and System.ServiceModel.ProtocolException: The remote server returned an unexpected response: (400) Bad Request. Earlier we thought if could because of Sharepoint list limit so we tried by reducing two of the columns and then it has went fine. So we left with one of the column of Datatype DT_STR and length 400 in oracle beacuse of which issue might be happening, It is mapped to sharepoint custom list field of multiline type. We also verified if length of field is issue but in oracle DB for all records max length for this column is only 239 so length issue is also ruled out. Any one who has faced this kind of issue or knows cause of this issue.Kindly let us know.. Thanks and regards, Vicky

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  • Get the selected drop down list value from a FormCollection in MVC

    - by James Santiago
    I have a form posting to an action with MVC. I want to pull the selected drop down list item from the FormCollection in the action. How do I do it? My Html form: <% using (Html.BeginForm()) {%> <select name="Content List"> <% foreach (String name in (ViewData["names"] as IQueryable<String>)) { %> <option value="<%= name %>"><%= name%></option> <% } %> </select> <p><input type="submit" value="Save" /></p> <% } %> My Action: [HttpPost] public ActionResult Index(FormCollection collection) { //how do I get the selected drop down list value? String name = collection.AllKeys.Single(); return RedirectToAction("Details", name); }

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  • Traversing Scheme function as a list

    - by csl
    Isn't it possible to treat functions in Scheme as any other list? Basically, what I want do to is something like this: (define (foo) "hello") (cdr foo) ; or similar, should return the list ((foo) "hello") I've found a similar discussion about this, and I feel a bit disappointed if this is not possible with Scheme. If so, why is this impossible? Is it possible in other lisps? EDIT: Changed (cdr 'foo) to (cdr foo) -- it was misleading. I'm asking, why can't I access a function as a list?

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  • KSoap2 list handling - is this the correct way?

    - by oozoo
    Hello, ksoap-newbie here I have a basic soap service running on glassfish, that returns List<String> like this <?xml version="1.0" encoding="UTF-8"?> <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/"> <S:Body> <ns2:getNamesResponse xmlns:ns2="http://namespace/"> <return>Name1</return> <return>Name2</return> </ns2:getNamesResponse> </S:Body> </S:Envelope> now in ksoap2 (android) I have to iterate the soap-object properties to get my list back: SoapObject result = (SoapObject) envelope.bodyIn; for(int i=0;i<result.getPropertyCount();i++) { list.add(result.getProperty(i)); } is there a better way? I couldn't find any class mapper in my implementation. thanks in advance

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  • Large file upload into WSS v3

    - by Rubens Farias
    I'd built an WSSv3 application which upload files in small chunks; when every data piece arrives, I temporarly keep it into a SQL 2005 image data type field for performance reasons**. Problem come when upload ends; I need to move data from my SQL Server to Sharepoint Document Library through WSSv3 object model. Right now, I can think two approaches: SPFileCollection.Add(string, (byte[])reader[0]); // OutOfMemoryException and SPFile file = folder.Files.Add("filename", new byte[]{ }); using(Stream stream = file.OpenBinaryStream()) { // ... init vars and stuff ... while ((bytes = reader.GetBytes(0, offset, buffer, 0, BUFFER_SIZE)) 0) { stream.Write(buffer, 0, (int)bytes); // Timeout issues } file.SaveBinary(stream); } Are there any other way to complete successfully this task? ** Performance reasons: if you tries to write every chunk directly at Sharepoint, you'll note a performance degradation as file grows up (100Mb).

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  • Which c# project files should I version control?

    - by DTown
    I have a project I'm looking to manually manage via perforce version control as I only have the Express edition. What I'm looking for is which files should be excluded in the version control as locking many of the files can result in a problem for visual studio compiling and debugging. What I have, so far, included. .cs files (except properties folder) .resx files .csproj files Excluded bin folder obj folder Properties folder .user file Let me know if there is something more that should be included that I have excluded or if there is a better way to do this.

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  • hibernate criteria OneToMany, ManyToOne and List

    - by jrsokolow
    Hi, I have three entities ClassA, ClassB and ClassC. ClassA { ... @Id @GeneratedValue @Column(name = "a_id") private long id; ... @OneToMany(cascade={CascadeType.ALL}) @JoinColumn(name="a_id") private List<ClassB> bbb; ... } ClassB { ... @ManyToOne private ClassC ccc; ... } ClassC { ... private String name; ... } I want to filter by hibernate criteria ClassA by 'name' member of ClassC. So I want to obtain by hibernate criteria list of ClassA objects which have inside ClassC objects with specified name. Problem is that access to ClassC objects is through ClassB list. I tried something like this but it does not work: crit.createCriteria("bbb").createCriteria("ccc").add(Restrictions.ilike("name", name, MatchMode.ANYWHERE)); I will be grateful for help.

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  • How to organize a large number of objects

    - by shane
    We have a large number of documents and metadata (xml files) associated with these documents. What is the best way to organize them? Currently we put them into a series of nested folders: /repository/category/date(when they were loaded into our db)/document_number.pdf and .xml We use the path as a unique identifier for the document in our system. This is more versatile than putting them all in a single flat folder. also it is independent from our database/application, so we can reload them in case of failure. Yet, it introduces some limitations. for example we can't move the files once they've been placed in this structure, also it takes work to put them this way. What is the best practice? How websites such as Scribd deal with this problem?

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  • Having py2exe include my data files (like include_package_data)

    - by cool-RR
    I have a Python app which includes non-Python data files in some of its subpackages. I've been using the include_package_data option in my setup.py to include all these files automatically when making distributions. It works well. Now I'm starting to use py2exe. I expected it to see that I have include_package_data=True and to include all the files. But it doesn't. It puts only my Python files in the library.zip, so my app doesn't work. How do I make py2exe include my data files?

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  • How to CompareTo two Object without known about their real type

    - by Kamil
    I have to implement a one linked list but it should put object in appropriate position. Everything was OK when I use it in conjunction with specific class, but when I tried make it universal and argument of method insert was Object some problem appeared. When I want to input Object in right position I should use CompareTo method, but there isn't method in Object class! The problem is how to compare two object elements without known about their real types. Maybe I should use generic class type? But what about CompareTo? Or maybe combine with Element class and place CompareTo there? I suppose it is feasible. :) public void insert(Object o) { Element el = new Element(o); // initializing and setting iterators while(!it.isDone() && ((it.current().getValue())).CompareTo(o)<0) // it.current() returns Element of List { //move interators } //... }

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  • scvmap, disco, xsd, wsdl, svcinfo and datasource files

    - by David Gray Wright
    We have a WEb Service named, let's say Foo. So there is a Foo.svc file and a code behind Foo.svc.cs. We add a silverlight project and wish to use the Foo.svc services so we add a Service Reference and call it's namespace FooBar. This creates the following files : Reference.cs Reference.svcmap Foo.xsd Foo.disco configuration.svcinfo Foo.wsdl Also various *.datasource files. Over time we update the Foo.svc and add more Web Services (methods and interfaces) and the number of files in the FooBar directory is growing. I have 26 Foo(nn).xsd files in this directory - where nn = 1 to 26. My configuration.svcinfo is upto configuration91.svcinfo. My question is this? Do any of these files need to be version controlled? Can they all be deleted each time you do a build \ deploy (as long as you do an update service reference)?

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  • Databound Checkbox list with textboxes in a webform

    - by zSysop
    Hi all, I'm having trouble coming up with a solution for the following problem and i was wondering if someone here would help me out. I need to pull a list of supplies from a db table and list them along with two textboxes (one for quantity, and another for manufacturer) so the list would look something like this. checkbox for supply 1 | Quantity | Manufacturer checkbox for supply 2 | Quantity | Manufacturer .. I also need to store all of the checked items in a db table. I'm not sure how i should go about doing this. I've heard some talk about a repeater control being useful but i've not come across any examples that do this type of thing. Thanks in advance

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  • Viewing large text file in a browser

    - by MeLight
    Hi, I need to write a text file viewer (not the directory tree, but the actual file contents) for use in a browser. It will be used to view large files. I want to give the user the ability to actually ummm, browse the file, ie prev page & next page buttons, while each page will show only a portion of the file. Two question: Is there anyway to pass the file descriptor through POST (or something) so that on each page I can keep reading from an already open file, and not starting all over again (again - huge files) Is there a way to read the file backwards? Will be very useful for browsing back in a file. Any other implementation ideas are very welcome. Thanks

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  • Initializing a List c#

    - by Mohan
    List<Student> liStudent = new List<Student> { new Student { Name="Mohan",ID=1 }, new Student { Name="Ravi",ID=2 } }; public class Student { public string Name { get; set; } public int ID { get; set; } } Is there other way to write this? I am a newbie. I want to make instance of student class first and assign properties in list.

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  • SharePoint itemDeleting evert is not working

    - by Clodin
    Hi! I have a site in SharePoint and I want to custom delete from a list. So, I'm creating the public class ListItemEventReceiver : SPItemEventReceiver { public override void ItemDeleting(SPItemEventProperties properties) { if (properties.ListTitle.Equals("Projects List")) { Projects pr = new Projects(); string projectName = properties.ListItem["Project Name"].ToString(); pr.DeleteProject(projectName); } } } Where 'Projects' class has 'DeleteProject' method who deletes the item. But it's doing nothing :( I mention that everything it's ok in Feature.xml Where am I wrong?

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  • Flash files are playing laggy /Jerky in screensaver

    - by yogesh-chhabra
    I have developed a screen saver for MAC OS X. Screen saver plays flash files. Whene I run screen saver on display resolution higher than 1300 X 1000 then flash files play very jerky / laggy. When I run it in low resolution then files play fine.Even flash files are playing fine in desktop application. This problem is more on 10.6 Snow Leopard. I am unable to find out the reason whether it is OS screensaver engine problem or flash files problem. I know rendering increases on high resolution but there should be solution for this problem

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  • Howto serialize a List<T> in Silverlight?

    - by Jurgen
    I have a struct called coordinate which is contained in a list in another class called segment. public struct Coordinate { public double Latitude { get; set; } public double Longtitude { get; set; } public double Altitude { get; set; } public DateTime Time { get; set; } } public class Segment { private List<Coordinate> coordinates; ... } I'd like to serialize the Segment class using the XmlSerializer using Silverlight (on Windows Phone 7). I understand from link text that XmlSerializer doesn't support List<T>. What is the advised way of serializing a resizable array coordinates? Thanks, Jurgen

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  • Scheme redefine a list...

    - by octavio
    I have a list called hand and another one called deck, the main goal here is to take the first card (or element ) in the list deck and put it in the list hand when i call the fnction draw... (draw hand deck) (2 C) (draw hand deck) (2 C) (3 H) (draw hand deck) (2 C) (3 H) (K D) but everytime i call it the hand never changes value... I'm clueless is there a way like in O-Object to change the content of hand permenantly? and i initialy define hand empty because the player has no card to start. (define hand '())

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  • Preventing referenced assembly PDB and XML files copied to output

    - by Jason Morse
    I have a Visual Studio 2008 C#/.NET 3.5 project with a post build task to ZIP the contents. However I'm finding that I'm also getting the referenced assemblies' .pdb (debug) and .xml (documentation) files in my output directory (and ZIP). For example, if MyProject.csproj references YourAssembly.dll and there are YourAssembly.xml and YourAssembly.pdb files in the same directory as the DLL they will show up in my output directory (and ZIP). I can exclude *.pdb when ZIP'ing but I cannot blanket exclude the *.xml files as I have deployment files with the same extension. Is there a way to prevent the project from copying referenced assembly PDB and XML files?

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