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• Disappearing IE6 elements.

  - by Stefan Kendall

  I don't know what could be causing this issue, but for some reason, elements on my page (list navigation items, specifically), are disappearing in IE6. That is, from IE developer toolbar, I can see that the elements are there, and the DOM/css is correct, but the elements just aren't visible. The odd thing is that if you set or toggle ANY css element on the list items with the IE6 toolbar, the elements appear. I also have a hover() jQuery action set on the list navigation items, and the event fires as if the elements were visible and working correctly. What could possibly be going wrong here? I initially thought z-index could be an issue, but changing ANY attribute or css value (not necessarily z-index), causes the element to render. I should note, however, that doing this programmatically does not cause the elements to display properly, even if triggered seconds after the page load.

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• Can this sql query be simplified?

  - by Bas

  I have the following tables: Person, {"Id", "Name", "LastName"} Sports, {"Id" "Name", "Type"} SportsPerPerson, {"Id", "PersonId", "SportsId"} For my query I want to get all the Persons that excersise a specific Sport whereas I only have the Sports "Name" attribute at my disposal. To retrieve the correct rows I've figured out the following queries: SELECT * FROM Person WHERE Person.Id in ( SELECT SportsPerPerson.PersonId FROM SportsPerPerson INNER JOIN Sports on SportsPerPerson.SportsId = Sports.Id WHERE Sports.Name = 'Tennis' ) AND Person.Id in ( SELECT SportsPerPerson.PersonId FROM SportsPerPerson INNER JOIN Sports on SportsPerPerson.SportsId = Sports.Id WHERE Sports.Name = 'Soccer' ) OR SELECT * FROM Person WHERE Id IN (SELECT PersonId FROM SportsPerPerson WHERE SportsId IN (SELECT Id FROM Sports WHERE Name = 'Tennis')) AND Id IN (SELECT PersonId FROM SportsPerPerson WHERE SportsId IN (SELECT Id FROM Sports WHERE Name = 'Soccer')) Now my question is, isn't there an easier way to write this query? Using just OR won't work because I need the person who play 'Tennis' AND 'Soccer'. But using AND also doesn't work because the values aren't on the same row.

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• How to make XmlnsDefinition work on the local assembly?

  - by Scott Bilas

  I've started using the XmlnsDefinition attribute to tie together some CLR namespaces into a single xmlns for convenience in XAML. Unfortunately, it seems that this only works when using foreign assemblies. If I have a XAML file in the same assembly as the types that are in the namespace I'm referencing from XmlnsDefinition, then it says the type does not exist in the xmlns I am defining. Moving the type to a foreign assembly fixes the problem. Is there a way to use XmlnsDefinition on an assembly and have it be used from within that assembly via XAML?

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• Django: How to create a model dynamically just for testing

  - by muhuk

  I have a Django app that requires a settings attribute in the form of: RELATED_MODELS = ('appname1.modelname1.attribute1', 'appname1.modelname2.attribute2', 'appname2.modelname3.attribute3', ...) Then hooks their post_save signal to update some other fixed model depending on the attributeN defined. I would like to test this behaviour and tests should work even if this app is the only one in the project (except for its own dependencies, no other wrapper app need to be installed). How can I create and attach/register/activate mock models just for the test database? (or is it possible at all?) Solutions that allow me to use test fixtures would be great.

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• How is ImmutableObjectAttribute used?

  - by Thomas Levesque

  I was looking for a built-in attribute to specify that a type is immutable, and I found only System.ComponentModel.ImmutableObjectAttribute. Using Reflector, I checked where it was used, and it seems that the only public class that uses it is System.Drawing.Image... WTF? It could have been used on string, int or any of the primitive types, but Image is definitely not immutable, there are plenty of ways to alter its internal state (using a Graphics or the Bitmap.SetPixel method for instance). So the only class in the BCL that is explicitly declared as immutable, is mutable! Or am I missing something?

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• PostSharp OnExceptionAspect not working as expected

  - by Rune Sundling

  Created a simple class to test out the OnExceptionAspect in PostSharp. [Serializable] [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class)] public class ExceptionSwallower : OnExceptionAspect { public override void OnException(MethodExecutionEventArgs eventArgs) { eventArgs.FlowBehavior = FlowBehavior.Return; base.OnException(eventArgs); } } Added the attribute to a method [ExceptionSwallower] public void SomeMethod() { throw new Exception(); } and invoked it. However, the exception is not actually swallowed, which seems odd. I haven't been able to find any similar problems, so I expect there is some minor thing I haven't gotten right. Anyone?

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• HttpRequestValidationexception on Asp.Net MVC

  - by elranu

  I’m getting an HttpRequestValidationexception with this error message: “A potentially dangerous Request.Form value was detected from the client”. But I have AllowHtml on the property that I’m getting the error. The problem is that later in my code I’m getting the following property to know in witch format I will show my view ControllerContext.HttpContext.Request.Params.AllKeys.Contains("format"). And on this “Param Getter” I’m getting the error. Let’s say my code is similar to the following: public class House { [AllowHtml] public string Text { get; set; } public string Name { get; set; } } [HttpPost, ValidateAntiForgeryToken] public ActionResult CreateTopic(House h) { //business code if(ControllerContext.HttpContext.Request.Params.AllKeys.Contains("format")) { Return view; } } How can I solve this? I already try with the ValidateInput(false) attribute on the controller action method. Any idea?

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• silverlight DataGrid style

  - by Piyush

  my Datagrid is: <data:DataGrid x:Name="dgSearchResults" Style="{StaticResource dgStyle}" Grid.Row="1" ColumnHeaderStyle="{StaticResource dgHeaderStyle}" > I have defined styles in my App.xaml file: <Style x:Key="dgStyle" TargetType="data:DataGrid"> <Setter Property="Background" Value="White"/> <Setter Property="RowBackground" Value="#FFF6F6F6"/> <Setter Property="Foreground" Value="#FF3A3B3B"/> <Setter Property="FontFamily" Value="Verdana"/> <Setter Property="FontSize" Value="13.333"/> </Style> EXCEPTION-- Invalid attribute value data:DataGrid for property TargetType. [Line: 61 Position: 43]

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• Can I make controls defined in my markup public instead of protected

  - by RoboShop

  Say I have a web site with a master page and an aspx page. In my ASPX page, I am pointing to my masterpage with the MasterType tag. <%@ MasterType VirtualPath="~/mymasterpage.master" % Say, I've defined a label in the markup of my master page. If you look at the designer code, this label should be something like this. protected global::System.Web.UI.WebControls.Label label1; Now in my content page, I would like to reference this label. If I type in this "Master.label1", the complier will complain that the control is inaccessible due to the protection level" and rightly so, as label1 is automatically defined as "protected". My question is, if I define controls in my markup page, is it possible to set these controls as public instead of protected? I do not see an attribute for it. thanks in advance.

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• Add a prefix do Django comment form

  - by Stefan Manastirliu

  I would like to add a prefix to each django comment form. I'm using multiply comment forms in the same page and depsite it's working well, i don't like having many input fields with the same id attribute like <input type="text" name="honeypot" id="id_honeypot" />. So, is there a way to tell django do add a prefix to each form instance? I know i can do it with other forms when i create a form instance in this waynewform = CustomForm(prefix="a") but using Django's comment system, this part is handled by a comment template tag {% get_comment_form for [object] as [varname] %}. Can I tell to the template tag to add a prefix?

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• App Engine webapp.RequestHandler child instances has no self.request during __init__

  - by grucha

  i use modified webapp.RequestHandler for handling requests in my app: class MyRequestHandler(webapp.RequestHandler): """ Request handler with some facilities like user. self.out is the dictionary to pass to templates """ def __init__(self, *args, **kwargs): super(MyRequestHandler, self).__init__(*args, **kwargs) self.out = { 'user': users.get_current_user(), 'logout_url': users.create_logout_url(self.request.uri) } def render(self, template_name): """ Shortcut to render templates """ self.response.out.write(template.render(template_name, self.out)) class DeviceList(MyRequestHandler): def get(self): self.out['devices'] = GPSDevice.all().fetch(1000) self.render('templates/device_list.html') but I get an exception: line 28, in __init__ self.out['logout_url'] = users.create_logout_url(self.request.uri) AttributeError: 'DeviceList' object has no attribute 'request' When the code causing exception is moved out of __init__ everything's fine: class MyRequestHandler(webapp.RequestHandler): """ Request handler with some facilities like user. self.out is the dictionary to pass to templates and initially it contains user object for example """ def __init__(self, *args, **kwargs): super(MyRequestHandler, self).__init__(*args, **kwargs) self.out = { 'user': users.get_current_user(), } def render(self, template_name): """ Shortcut to render templates """ self.out['logout_url'] = users.create_logout_url(self.request.uri) self.response.out.write(template.render(template_name, self.out)) Whi is that? Why there's no self.request after parent's (i.e. webapp.RequestHandler's) __init__ was executed?

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• VB.NET equivalent of Timeout.bas Module from VB6

  - by user557889

  Hi all. I am looking for the VB.NET code of a very handy little *.bas file I used to use in Visual Basic 6. The file was called timeout.bas and it was the greatest module ever to me. I want to switch to start using VB.NET finally but this single file is holding me back. Trying to use .NET without it is like crippling me. Can someone, anyone please make this code work in .NET for me? It's only a couple lines: Attribute VB_Name = "Module1" Sub timeout(duration) starttime = Timer Do While Timer - starttime < duration DoEvents Loop End Sub Basically you add that timeout.bas file which contains that code and you can just do: Text1.text = "hello" timeout .5 Text1.text "World!" It's so awesome. Anyone PLEASE re-do it in VB.NET for me! Thanks!

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• PrincipalPermission - roles seperate from permissions

  - by Leblanc Meneses

  I've been using PrincipalPermission for a while in wcf services. [PrincipalPermission(SecurityAction.Demand, Role = SecurityRoles.CanManageUsers)] although now i have a requirement to simplify roles by business unit. - currently aspnet_roles has fine grained can* permissions. Here is my approach and wanted to see if anyone can provide feedback, code review before i implement my suggestion. 1) aspnet_roles - business unit role 2) create permission table and Role_Permission table and User_Permission table (many to many) 3) create custom CodeAccessSecurityAttribute + that looks at new tables [CustomPermissionCheck(Security.Demand, HasPermission="can*")] first iteration i'll statically new the dependent repository.. ideally i would like an aop style attribute that has repository injected IPermissionRepository.HasPermission(...); If i approach new aop way i probably will stop inheriting from CodeAccessSecurityAttribute -- what do the security guys have to say about this? has anyone else solved this, is there something in the framework that i've missed?

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• Using attr_accessible in a join model with has_many :through relationship

  - by Paulo Oliveira

  I have a USER that creates a COMPANY and become an EMPLOYEE in the process. The employees table has an :user_id and a :company_id. class User has_many :employees has_many :companies, :through => :employees class Employee belongs_to :user belongs_to :company attr_accessible :active class Company has_many :employees has_many :users, :through => employees Pretty basic. But here's the thing, the resource EMPLOYEE has other attributes than its foreign keys, like the boolean :active. I would like to use attr_accessible, but this causes some problems. The attribute :user_id is set right, but :company_id is nil. @user.companies << Company.new(...) Employee id:1 user_id:1 company_id:nil So my question is: if :user_id is set right, despite it is not an attr_accessible, why :company_id isn't set right just the same? It shouldn't be an attr_accessible. I'm using Rails 3.0.8, and have also tested with 3.0.7.

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• Rails AR validates_uniqueness_of against polymorphic relationship

  - by aaronrussell

  Is it posible to validate the uniqueness of a child model's attribute scoped against a polymorphic relationship? For example I have a model called field that belongs to fieldable: class Field < ActiveRecord::Base belongs_to :fieldable, :polymorphic => :true validates_uniqueness_of :name, :scope => :fieldable_id end I have several other models (Pages, Items) which have many Fields. So what I want is to validate the uniqueness of the field name against the parent model, but the problem is that occasionally a Page and an Item share the same ID number, causing the validations to fail when they shouldn't. Am I just doing this wrong or is there a better way to do this?

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• Identifying NHibernate proxy classes

  - by Marc Gravell

  I'm not an NHibernate user; I write a serialization utility library. A user has logged a feature-request that I should handle NHibernate proxy classes, treating them the same as the actual type. At the moment my code is treating them as unexpected inheritance, and throwing an exception. The code won't know in advance about NHibernate (including no reference, but I'm not aftaid of reflection ;-p) Is there a robust / guaranteed way of detecting such proxy types? Apparently DataContractSerializer handles this fine, so I'm hoping it is something pretty simple. Perhaps some interface or [attribute] decoration. Also, during deserialization; at the moment I would be creating the original type (not the NHibernate type). Is this fine for persistence purposes? Or is the proxy type required? If the latter; what is required to create an instance of the proxy type?

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• Web Service in c# - "This web service is using http://tempuri.org/ as its default namespace."

  - by glenatron

  I've created a web service using Visual Studio ( 2005 - I know I'm old school ) and it all compiles fine but when it opens I get warned thus: This web service does not conform to WS-I Basic Profile v1.1. And furthermore: This web service is using http://tempuri.org/ as its default namespace. Which would be fine except my service begins thus: [WebService(Namespace = "http://totally-not-default-uri.com/servicename")] Searching the entire solution folder for "tempuri" returns nothing. I can't find it mentioned in any configuration page acessible from Visual Studio. And yet it's right there in the wsdl:definitions list for the xmlns:tns attribute on the web service descriptor page when I view it through the browser and as targetNamespace in the same tag. I'm viewing it using Visual Studio's "debug" mode with the built in server from that. Seems like something has got cached somewhere but I can't work out what and where- I've tried stopping and restarting the server, cleaning and rebuilding the service and going through the associated text config files with a text editor but no dice. Any idea what is going on?

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• __getattr__ on a module

  - by Matt Joiner

  How can implement the equivalent of a __getattr__ on a class, on a module? Example When calling a function that does not exist in a module's statically defined attributes, I wish to create an instance of a class in that module, and invoke the method on it with the same name as failed in the attribute lookup on the module. class A(object): def salutation(self, accusative): print "hello", accusative def __getattr__(mod, name): return getattr(A(), name) if __name__ == "__main__": salutation("world") Which gives: matt@stanley:~/Desktop$ python getattrmod.py Traceback (most recent call last): File "getattrmod.py", line 9, in <module> salutation("world") NameError: name 'salutation' is not defined Evidently something is not right about my assumed implementation.

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• IAR Embedded Workbench - setting endian-ness of variable

  - by Seidleroni

  I'm using IAR Embedded Workbench for ARM (ARM7TDMI-S) and the majority of my work is done using little-endian format. However, I saw in the manual that I can do something like : __big_endian int i, j; to declare those two variables as big endian (while the rest of the app as little endian). This seems like a fantastic feature, but when I try to compile, I always get the errror: Error[Pa002]: the type attribute "__big_endian" is not allowed on this declaration. The big endian line above is copied directly from the manual, but it does not work. This is a great feature of the compiler and would make life a big easier. Any ideas how to get it working? I have my language conformance set to 'Allow IAR extensions' on the C/C++ Compiler options tab on the IDE options.

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• Binding to static property

  - by Anthony Brien

  I'm having a hard time binding a simple static string property to a text box. Here's the class with the static property: public class VersionManager { private static string filterString; public static string FilterString { get { return filterString; } set { filterString = value; } } } In my xaml, I just want to bind this static property to a text box: <TextBox> <TextBox.Text> <Binding Source="{x:Static local:VersionManager.FilterString}"/> </TextBox.Text> </TextBox> Everything compiles, but at run time, I get the following exception: Cannot convert the value in attribute 'Source' to object of type 'System.Windows.Markup.StaticExtension'. Error at object 'System.Windows.Data.Binding' in markup file 'BurnDisk;component/selectversionpagefunction.xaml' Line 57 Position 29. Any idea what I'm doing wrong?

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• How to set source path of image within html pages to show in webbrowser control

  - by Royson

  Hi in my application there is web browser control to show some static html pages. The pages are displayed properly. but images are not displayed.. I tried with changing src-path but no success. my htmlpages folder is located at bin folder. And i am assigning it as. FileStream source = new FileStream(@"..\HtmlPages\supportHtml.html", FileMode.Open, FileAccess.Read); if i open html files in browser, the images are displayed properly.. So, What is the correct path for images..?? If i set full path to src attribute of <img> tag..it works. but i think its not a proper way. :( EDIT: If i assign d:\myapp\bin\HtmlPages\support.gif then image is displayed. And if i assign "..\HtmlPages\support.gif" or "support.gif" image is not shown.

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• In javascript, how do I find out the name of a function from within that function?

  - by roryhewitt

  The title should make it clear. Is it possible from within a function to determine the name of that function? Basically, I'm adding some debugging code to a number of functions, and I'd like to be able to simply add the following line inside every function: if (global_debugOn) alert("Processing function " + function-name); How can I get 'function-name'? Yes, obviously I could simply type in the function name (after all I'm typing in the whole alert bit), but that's a hassle to do, especially if there is a nice simple way of retrieving it dynamically. Plus, as function names change during development, I'd like to keep it up-to-date... I hoped that maybe the arguments attribute might hold this (e.g. arguments[0], like in C), but I couldn't get it to work. I'm not even sure if arguments works anyway. Thanks! Rory

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• Naming convention for utility classes in Java

  - by Zarjay

  When writing utility classes in Java, what are some good guidelines to follow? Should packges be "util" or "utils"? Is it ClassUtil or ClassUtils? When is a class a "Helper" or a "Utility"? Utility or Utilities? Or do you use a mixture of them? The standard Java library uses both Utils and Utilities: javax.swing.Utilities javax.print.attribute.AttributeSetUtilities javax.swing.plaf.basic.BasicGraphicsUtils Apache uses a variety of Util and Utils, although mostly Utils: org.apache.commons.modeler.util.DomUtil org.apache.commons.modeler.util.IntrospectionUtils org.apache.commons.io.FileSystemUtils org.apache.lucene.wordnet.AnalyzerUtil org.apache.lucene.util.ArrayUtil org.apache.lucene.xmlparser.DOMUtils Spring uses a lot of Helper and Utils classes: org.springframework.web.util.UrlPathHelper org.springframework.core.ReflectiveVisitorHelper org.springframework.core.NestedExceptionUtils org.springframework.util.NumberUtils So, how do you name your utility classes?

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• ReturnUrl = Default.aspx for MVC?

  - by Cynthia

  I'm trying to secure my entire MVC site, so before the Home controller, I added an [Authorize] attribute. Now if you run it from Visual Studio or navigate using the root URL (e.g. http://localhost:2897) it does redirect to the login page, as expected. However the URL in the address bar after redirection looks like this: http://localhost:2897/Account/LogOn?ReturnUrl=%2fdefault.aspx%3f I haven't tested this out, seeing as I have not implemented my authentication code. However, this looks like a big problem to me, since I do not have a default.aspx in my project! My authentication tag in the web.config looks like this: <authentication mode="Forms"> <forms loginUrl="~/Account/LogOn" defaultUrl="~/Home/Index" timeout="2880"/> </authentication> Why doesn't it pick up this route as the default ReturnUrl instead of default.aspx?

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• DataTable C# Empty column type

  - by Dested

  I am trying build a DataTable one row at a time using the following code. foreach (var e in Project.ProjectElements[hi.FakeName].Root.Elements()) { index = 0; object[] obj=new object[count]; foreach (var holdingColumn in names) { string d = e.Attribute(holdingColumn.Key).Value; obj[index++] = d; } dt.Rows.Add(obj); } The problem is the DataTable has types tied to the columns. Sometimes im passing null (or an empty string) in that object index and it is telling me that it cant be converted properly to a DateTime (in this case). My question is what should I default this value to, or is there some way to have the DataTable ignore empty values.

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