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  • GWT Dynamic loading using GWT.create() with String literals instead of Class literals

    - by Sathish
    GWT.create() is the reflection equivalent in GWT, But it take only class literals, not fully qualified String for the Class name. How do i dynamically create classes with Strings using GWT.create()? Its not possible according to many GWT forum posts but how is it being done in frameworks like Rocket-GWT (http://code.google.com/p/rocket-gwt/wiki/Ioc) and Gwittir (http://code.google.com/p/gwittir/wiki/Introspection)

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  • Build and render infinite hierarchical category tree from self-referential category table

    - by FreshCode
    I have a Categories table in which each category has a ParentId that can refer to any other category's CategoryId that I want to display as multi-level HTML list, like so: <ul class="tree"> <li>Parent Category <ul> <li>1st Child Category <!-- more sub-categories --> </li> <li>2nd Child Category <!-- more sub-categories --> </li> </ul> </li> </ul> Presently I am recursively rendering a partial view and passing down the next category. It works great, but it's wrong because I'm executing queries in a view. How can I render the list into a tree object and cache it for quick display every time I need a list of all hierarchical categories?

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  • WPF - Binding problem

    - by Erez
    Why after clicking the button the text in the textblock doesn't change ? XAML: <Grid> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <TextBlock Text="{Binding Name}"/> <Button Click="Button_Click" Grid.Row="1" Margin="20">Click Me</Button> </Grid> Code behind: public partial class Window1 : Window, INotifyPropertyChanged { private Person _myPerson; public Person MyPerson { get { return _myPerson; } set { _myPerson = value; if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("MyPerson")); } } } public Window1() { MyPerson = new Person { Name = "A" }; DataContext = MyPerson; InitializeComponent(); } private void Button_Click(object sender, RoutedEventArgs e) { MyPerson = new Person { Name = "B" }; } #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion }

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  • Apple Core Foundation license

    - by Shane
    Hi all, A short but sweet question: Can I use Apple's open source Core Foundation (CF classes) in a commercial product for free? That is, can I compile and link against the libraries without open sourcing my own applications's code? Obviously if I alter the original CF code, I would submit the changes. It's a very well constructed API and I'd hate to have to reinvent the wheel. Cheers, Shane

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  • Best Practices - Data Annotations vs OnChanging in Entity Framework 4

    - by jptacek
    I was wondering what the general recommendation is for Entity Framework in terms of data validation. I am relatively new to EF, but it appears there are two main approaches to data validation. The first is to create a partial class for the model, and then perform data validations and update a rule violation collection of some sort. This is outlined at http://msdn.microsoft.com/en-us/library/cc716747.aspx The other is to use data annotations and then have the annotations perform data validation. Scott Guthrie explains this on his blog at http://weblogs.asp.net/scottgu/archive/2010/01/15/asp-net-mvc-2-model-validation.aspx. I was wondering what the benefits are of one over the other. It seems the data annotations would be the preferred mechanism, especially as you move to RIA Services, but I want to ensure I am not missing something. Of course, nothing precludes using both of them together. Thanks John

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  • Fluent NHibernate - How to map a non nullable foreign key that exists in two joined tables

    - by vakman
    I'm mapping a set of membership classes for my application using Fluent NHibernate. I'm mapping the classes to the asp.net membership database structure. The database schema relevant to the problem looks like this: ASPNET_USERS UserId PK ApplicationId FK NOT NULL other user columns ... ASPNET_MEMBERSHIP UserId PK,FK ApplicationID FK NOT NULL other membership columns... There is a one to one relationship between these two tables. I'm attempting to join the two tables together and map data from both tables to a single 'User' entity which looks like this: public class User { public virtual Guid Id { get; set; } public virtual Guid ApplicationId { get; set; } // other properties to be mapped from aspnetuser/membership tables ... My mapping file is as follows: public class UserMap : ClassMap<User> { public UserMap() { Table("aspnet_Users"); Id(user => user.Id).Column("UserId").GeneratedBy.GuidComb(); Map(user => user.ApplicationId); // other user mappings Join("aspnet_Membership", join => { join.KeyColumn("UserId"); join.Map(user => user.ApplicationId); // Map other things from membership to 'User' class } } } If I try to run with the code above I get a FluentConfiguration exception Tried to add property 'ApplicationId' when already added. If I remove the line "Map(user = user.ApplicationId);" or change it to "Map(user = user.ApplicationId).Not.Update().Not.Insert();" then the application runs but I get the following exception when trying to insert a new user: Cannot insert the value NULL into column 'ApplicationId', table 'ASPNETUsers_Dev.dbo.aspnet_Users'; column does not allow nulls. INSERT fails. The statement has been terminated. And if I leave the .Map(user = user.ApplicationId) as it originally was and make either of those changes to the join.Map(user = user.ApplicationId) then I get the same exception above except of course the exception is related to an insert into the aspnet_Membership table So... how do I do this kind of mapping assuming I can't change my database schema?

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  • LicenseException for Xceed DataGrid for WPF

    - by ewall
    I have developed a simple DB-editing app using Xceed's excellent DataGrid for WPF (UX Edition version 3.7), which is now ready for deployment... except that when I run it on a machine other than the development one where it was built, I am getting the runtime exception for invalid licensing. I have included my license key in the App.xaml.cs exactly as specified in the Xceed docs, like so: public partial class App : System.Windows.Application { protected override void OnStartup(StartupEventArgs e) { Xceed.Wpf.DataGrid.Licenser.LicenseKey = "DGF37-xxxxx-xxxxx-xxxx"; base.OnStartup(e); } } The correct version of the DataGrid DLLs are being included in the setup and the application's program directory, and there are no other versions on the target machine. Debugging doesn't show me anything useful other than the LicenseException that is thrown when the code tries to use the DataGrid, with the message that reads "Xceed.Wpf.DataGrid.Licenser.LicenseKey property must be set to a valid license key in the code of your application before using this product..." Any idea what's going wrong here?

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  • Edit dialog, with bindings and OK/Cancel in WPF

    - by Erik
    How can i have a dialog for editing the properties of a class with binding, and have OK-Cancel in the dialog? My first idea was this: public partial class EditServerDialog : Window { private NewsServer _newsServer; public EditServerDialog(NewsServer newsServer) { InitializeComponent(); this.DataContext = (_newsServer = newsServer).Clone(); } private void ButtonClick(object sender, RoutedEventArgs e) { switch (((Button)e.OriginalSource).Content.ToString()) { case "OK": _newsServer = (NewsServer)this.DataContext; this.Close(); break; case "Cancel": this.Close(); break; } } } When in the switch, case "OK", the DataContext contains the correct information, but the originally passed NewsServer instance does not change.

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  • How to set HTTP Headers from client class inherited from SoapHttpClientProtocol

    - by Alfred
    I'm using a class MyClass inherited from SoapHttpClientProtocol (auto-generated in my project by creating a WebReference from a .wsdl file, representing a service). Before calling a "WebMethod" of this service, I need to custom the http header of my request. I tried overloading the GetWebRequest() method of SoapHttpClientProtocol that way : public partial class MyClass: System.Web.Services.Protocols.SoapHttpClientProtocol{ protected override WebRequest GetWebRequest(Uri uri) { HttpWebRequest request = (HttpWebRequest)base.GetWebRequest(uri); request.Headers.Add("MyCustomHeader", "MyCustomHeaderValue"); return request; } } I was hoping that GetWebRequest was called in the constructor of MyClass, apparently it's not. Could someone help me ?

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  • Compiler can not find AndroidInstrumentationTestCase2 when building Android app test code with Andro

    - by orospakr
    I have a project with some Android test code in it (with the appropriate elements, <uses-library> and <instrumentation>, added to AndroidManifest.xml). This works fine in Eclipse. However, it fails to build with mm, claiming that it can't find the test-runner classes: /home/orospakr/code/my-android/packages/apps/MyApp/src/ca/orospakr/myapp/test/functional/MyActivityTest.java:5: cannot find symbol symbol : class ActivityInstrumentationTestCase2 location: package android.test import android.test.ActivityInstrumentationTestCase2; ^

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  • Domain driven design: Manager and service

    - by ryudice
    I'm creating some business logic in the application but I'm not sure how or where to encapsulate it, I've used the repository pattern for data access, I've seen some projects that use DDD that have some classes with the "Service" suffix and the "manager" suffix, what are each of this clases suppose to take care of in DDD?

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  • ANTLRv3 How to set a custom Lexer and Parser Class names

    - by Filip
    Is there a way to specify custom class name (meaning independent of the grammar name) for the ANTLRv3 generated Parser and Lexer classes? So in the case of grammar MDD; //other stufff Automtaically it would crate MDDParser and MDDLexer, but i would like to have them for example as MDDBaseParser and MDDLexer.

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  • Microsoft.Office.Interop.Word documentation

    - by rold2007
    I need to use the Microsoft.Office.Interop.Word namespace to extract if a Word document contains macros, and which ones. The MSDN documentation for this namespace doesn't give much information compared to the documentation on other .Net classes. Where can I get more informations about this namespaces (examples, complete documentation, etc.). I already searched on Google and SO but didn't much information.

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  • Java webapp: adding a content-disposition header to force browsers "save as" behavior

    - by WizardOfOdds
    Even though it's not part of HTTP 1.1/RFC2616 webapps that wish to force a resource to be downloaded (rather than displayed) in a browser can use the Content-Disposition header like this: Content-Disposition: attachment; filename=FILENAME Even tough it's only defined in RFC2183 and not part of HTTP 1.1 it works in most web browsers as wanted. So from the client side, everything is good enough. However on the server-side, in my case, I've got a Java webapp and I don't know how I'm supposed to set that header, especially in the following case... I'll have a file (say called "bigfile") hosted on an Amazon S3 instance (my S3 bucket shall be accessible using a partial address like: files.mycompany.com/) so users will be able to access this file at files.mycompany.com/bigfile. Now is there a way to craft a servlet (or a .jsp) so that the Content-Disposition header is always added when the user wants to download that file? What would the code look like and what are the gotchas, if any?

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  • Java language features which have no equivalent in C#

    - by jthg
    Having mostly worked with C#, I tend to think in terms of C# features which aren't available in Java. After working extensively with Java over the last year, I've started to discover Java features that I wish were in C#. Below is a list of the ones that I'm aware of. Can anyone think of other Java language features which a person with a C# background may not realize exists? The articles http://www.25hoursaday.com/CsharpVsJava.html and http://en.wikipedia.org/wiki/Comparison_of_Java_and_C_Sharp give a very extensive list of differences between Java and C#, but I wonder whether I missed anything in the (very) long articles. I can also think of one feature (covariant return type) which I didn't see mentioned in either article. Please limit answers to language or core library features which can't be effectively implemented by your own custom code or third party libraries. Covariant return type - a method can be overridden by a method which returns a more specific type. Useful when implementing an interface or extending a class and you want a method to override a base method, but return a type more specific to your class. Enums are classes - an enum is a full class in java, rather than a wrapper around a primitive like in .Net. Java allows you to define fields and methods on an enum. Anonymous inner classes - define an anonymous class which implements a method. Although most of the use cases for this in Java are covered by delegates in .Net, there are some cases in which you really need to pass multiple callbacks as a group. It would be nice to have the choice of using an anonymous inner class. Checked exceptions - I can see how this is useful in the context of common designs used with Java applications, but my experience with .Net has put me in a habit of using exceptions only for unrecoverable conditions. I.E. exceptions indicate a bug in the application and are only caught for the purpose of logging. I haven't quite come around to the idea of using exceptions for normal program flow. strictfp - Ensures strict floating point arithmetic. I'm not sure what kind of applications would find this useful. fields in interfaces - It's possible to declare fields in interfaces. I've never used this. static imports - Allows one to use the static methods of a class without qualifying it with the class name. I just realized today that this feature exists. It sounds like a nice convenience.

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  • Removing table prefixes on ASP.NET MVC DataModel entities

    - by Tim Shults
    My database tables have prefixes on them and when the DataModel generates the EntityObjects they have the prefixes at the beginning of the class name. Is there anyway that I can have those prefixes ignored when the DataModel is updating/creating the classes? I've found the below question, but with no solution. http://stackoverflow.com/questions/1800065/removing-table-prefix-in-linq2sql-setup/2525827#2525827 Thanks in advance, Tim Shults

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  • Guides for PostgreSQL query tuning?

    - by Joe
    I've found a number of resources that talk about tuning the database server, but I haven't found much on the tuning of the individual queries. For instance, in Oracle, I might try adding hints to ignore indexes or to use sort-merge vs. correlated joins, but I can't find much on tuning Postgres other than using explicit joins and recommendations when bulk loading tables. Do any such guides exist so I can focus on tuning the most run and/or underperforming queries, hopefully without adversely affecting the currently well-performing queries? I'd even be happy to find something that compared how certain types of queries performed relative to other databases, so I had a better clue of what sort of things to avoid. update: I should've mentioned, I took all of the Oracle DBA classes along with their data modeling and SQL tuning classes back in the 8i days ... so I know about 'EXPLAIN', but that's more to tell you what's going wrong with the query, not necessarily how to make it better. (eg, are 'while var=1 or var=2' and 'while var in (1,2)' considered the same when generating an execution plan? What if I'm doing it with 10 permutations? When are multi-column indexes used? Are there ways to get the planner to optimize for fastest start vs. fastest finish? What sort of 'gotchas' might I run into when moving from mySQL, Oracle or some other RDBMS?) I could write any complex query dozens if not hundreds of ways, and I'm hoping to not have to try them all and find which one works best through trial and error. I've already found that 'SELECT count(*)' won't use an index, but 'SELECT count(primary_key)' will ... maybe a 'PostgreSQL for experienced SQL users' sort of document that explained sorts of queries to avoid, and how best to re-write them, or how to get the planner to handle them better. update 2: I found a Comparison of different SQL Implementations which covers PostgreSQL, DB2, MS-SQL, mySQL, Oracle and Informix, and explains if, how, and gotchas on things you might try to do, and his references section linked to Oracle / SQL Server / DB2 / Mckoi /MySQL Database Equivalents (which is what its title suggests) and to the wikibook SQL Dialects Reference which covers whatever people contribute (includes some DB2, SQLite, mySQL, PostgreSQL, Firebird, Vituoso, Oracle, MS-SQL, Ingres, and Linter).

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  • Why do I lose my javascript from the browser cache after a full page postback?

    - by burak ozdogan
    Hi, I have an external javascript file which I include to my page on the code behind (as seen below). My problem is, when I my page makes a postback (not partial one), I check the loaded scripts by using FireBug, and I cannot see the javascript file in the list after the post back. I asusmed once it is included to page on the first load, browser will be caching it so that I do not need to re-include it. What am I doing wrong? The way I include the script is here: protected override void OnInit(EventArgs e) { if (this.Page.IsPostBack==false) { if (this.Page.ClientScript.IsClientScriptIncludeRegistered("ctlPalletDetail")==false) { string guidParamToHackBrowserCaching = System.Guid.NewGuid().ToString(); this.Page.ClientScript.RegisterClientScriptInclude("ctlPalletDetail", ResolveUrl(String.Format("~/clientScripts/ctlLtlRequestDetail.js?par={0}",guidParamToHackBrowserCaching))); } } base.OnInit(e); }

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  • How can i navigate one xaml page to another?

    - by programmerist
    i have 2 page i need to navigate mainpage.xaml to login.page xaml but it throws me Object reference not set to an instance of an object. in Root.Children.Clear();.... i added this codes in App.xaml: private void Application_Startup(object sender, StartupEventArgs e) { Grid myGrid = new Grid(); myGrid.Children.Add(new MainPage()); this.RootVisual = myGrid; } and than i adde some codes on main.xaml to navigate to LoginUI.xaml namespace Gen.CallCenter.UI { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); Grid Root = ((Grid)(this.Parent)); Root.Children.Clear(); Root.Children.Add(new LoginUI()); } } } How can i navigate main.xaml to LoginUI.xaml ?

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