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• Delegate OpenID to Google (NOT Google Apps)

  - by Rio

  OK, I searched this question on SO but no good answer. After spent some time I figured out how to do it. I'm going to answer this myself as a way to share it. Not sure if this is the correct way to use SO, but here it goes: Now it is possible delegate OpenID to your Google account (not Google Apps). No, this is not using the demo OpenID provider using App Engine. This is your REAL Google account! First you need to enable your Google Profiles. Try to view your profile and edit it, there should be an option to set your Profile URL. You have two choices there: either use your Gmail account name (without the @gmail.com part) as your profile id, or a random number assigned to you. It's up to you to decide which one to use. Either way, that id is your profile id below. Now add the following HTML code to your delegating page: <link rel="openid2.provider" href="https://www.google.com/accounts/o8/ud?source=profiles" > <link rel="openid2.local_id" href="http://www.google.com/profiles/[YOUR PROFILE ID]" > And it's done. Now try login SO with your custom url!

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• Automatic web form testing/filling

  - by Polatrite

  I recently became lead on getting an inordinate amount of testing done in a very short period of time. We have many different web forms, using custom (Telerik) controls that need to be tested for proper data validation and sensible handling of the data. Some of the forms are several pages long with 30-80 different controls for data entry. I am looking for a software solution (that is free) that would allow me to automate the process of filling in these forms by designing a script, or using a UI. The other requirement is that I can't use any browsers but IE6 (terrible, I know). I have previously used AutoHotkey to great success for automatic Windows form testing, since Autohotkey's API allows you to directly reference controls on the Windows form. However Autohotkey does not have similar support for web forms (everything is just one big "InternetExplorer" control). While I would prefer that I could script some variance in the data to help serialize each test, it's not necessary, as I could go back through and manually edit a field or two (plus "break" whatever control I'm currently testing) to serialize each test. If you've ever seen Spawner: http://forge.mysql.com/projects/project.php?id=214 It's almost exactly the sort of thing I'm looking for (Spawner generates dummy SQL data, as opposed to dummy webform data) - but I won't be picky, I've got a really short deadline to meet and had this thrust in my lap just today. ;) Edit1: One of the challenges of just using Autohotkey to simulate keyboard input (tabbing through controls) is that some controls don't currently have tab index (bug), and some controls cause a page reload after modification, resulting in inconsistent control focus (tabbing screwed up). Our application makes heavy use of page reloads to populate fields (select a location, it auto-populates a city, for example).

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• [Apache Camel] Generating multiple files based on DB query in a nice way

  - by chantingwolf

  Dear all, I have a following question. I have to generate many files based on sql query. Let's say for example, I have get from database a list of orders made today and genarate file for each order and later store each file on ftp. Ideally I would like to get follewing. Not quite sure how to get it. from(MyBean).to(Ftp) The problem and main question is how to generate multiple messages by custom bean (for example). I am not sure if splitter EIP is ok in this case because in my case I have not just one message to split, but I just have to generate and send many messages. http://camel.apache.org/splitter.html I hope, someone meet this problem before. If the task will be to generate just one file - everything is quite simple - you need just fill Exchange.OutMessage (or something like this). But what about multiple files - I really can't get, how to manage this situation. P.S. Sorry if this question is stupid. I am novice in Camel (working with it just for coupe weeks). It's a great tool. Actually, that's why I want to use in in the best way. Thanks a lot.

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• TCP: Address already in use exception - possible causes for client port? NO PORT EXHAUSTION

  - by TomTom

  Hello, stupid problem. I get those from a client connecting to a server. Sadly, the setup is complicated making debugging complex - and we run out of options. The environment: *Client/Server system, both running on the same machine. The client is actually a service doing some database manipulation at specific times. * The cnonection comes from C# going through OleDb to an EasySoft JDBC driver to a custom written JDBC server that then hosts logic in C++. Yeah, compelx - but the third party supplier decided to expose the extension mechanisms for their server through a JDBC interface. Not a lot can be done here ;) The Symptom: At (ir)regular intervals we get a "Address already in use: connect" told from the JDBC driver. They seem to come from one particular service we run. Now, I did read all the stuff about port exhaustion. This is why we have a little tool running now that counts ports and their states every minute. Last time this happened, we had an astonishing 370 ports in use, with the count rising to about 900 AFTER the error. We aleady patched the registry (it is a windows machine) to allow more than the 5000 client ports standard, but even then, we are far far from that limit to start with. Which is why I am asking here. Ayneone an ide what ELSE could cause this? It is a Windows 2003 Server machine, 64 bit. The only other thing I can see that may cause it (but this functionality is supposedly disabled) is Symantec Endpoint Protection that is installed on the server - and being capable of actinc as a firewall, it could possibly intercept network traffic. I dont want to open a can of worms by pointing to Symantec prematurely (if pointing to Symantec can ever be seen as such). So, anyone an idea what else may be the cause? Thanks

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• Which is a good way to maintain resources for Internationalization in .Net

  - by ashtee

  I have thought of three approaches to create and maintain resources in .Net projects for WinForms using Visual Studio 2008. (I am sure there should be more than three ways.) I need to decide on one before starting to implement internationalization for our product. Have individual sets of resource files (resx) for each windows form or piece of UI (a custom control) in each .net project. These are auto generated by Visual Studio when Localizable property is set to true in the form or control properties. Have one resource file per .net project. This is added manually and updated manually with the resource strings and messages. Have one resource manager project that has resources for all the components for a set of .net projects. Personally, I do not like the first approach as it creates numerous resources files. The only advantage we get in this approach is that we do not need to set text in UI elements manually. I like second and third approach as they are easy to maintain and there is only one set of resources that you need to handle. So no duplication of strings and messages. Easy for the translators also. What are your thoughts? Please share.

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• Datatable add new column and values speed issue

  - by Cine

  I am having some speed issue with my datatables. In this particular case I am using it as holder of data, it is never used in GUI or any other scenario that actually uses any of the fancy features. In my speed trace, this particular constructor was showing up as a heavy user of time when my database is ~40k rows. The main user was set_Item of DataTable. protected myclass(DataTable dataTable, DataColumn idColumn) { this.dataTable = dataTable; IdColumn = idColumn ?? this.dataTable.Columns.Add(string.Format("SYS_{0}_SYS", Guid.NewGuid()), Type.GetType("System.Int32")); JobIdColumn = this.dataTable.Columns.Add(string.Format("SYS_{0}_SYS", Guid.NewGuid()), Type.GetType("System.Int32")); IsNewColumn = this.dataTable.Columns.Add(string.Format("SYS_{0}_SYS", Guid.NewGuid()), Type.GetType("System.Int32")); int id = 1; foreach (DataRow r in this.dataTable.Rows) { r[JobIdColumn] = id++; r[IsNewColumn] = (r[IdColumn] == null || r[IdColumn].ToString() == string.Empty) ? 1 : 0; } Digging deeper into the trace, it turns out that set_Item calls EndEdit, which brings my thoughts to the transaction support of the DataTable, for which I have no usage for in my scenario. So my solution to this was to open editing on all of the rows and never close them again. _dt.BeginLoadData(); foreach (DataRow row in _dt.Rows) row.BeginEdit(); Is there a better solution? This feels too much like a big giant hack that will eventually come and bite me. You might suggest that I dont use DataTable at all, but I have already considered that and rejected it due to the amount of effort that would be required to reimplement with a custom class. The main reason it is a datatable is that it is ancient code (.net 1.1 time) and I dont want to spend that much time changing it, and it is also because the original table comes out of a third party component.

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• NSOutlineView/NSTreeController - calculate sum of column

  - by matei

  I have a NSOutlineView bound to a NSTreeController. My data items are a custom class , let's call them "Row", and suppose a Row contains a "name" and a numeric field called "number" . All these "Rows" are found in let's say a "RowContainer" which has a "rows" mutable array holding the parent (level 0) rows. Each row also has a "children" NSMutableArray member which holds it's children. I have this working, and I want to display under the outlineview a textfield with the sum of all the "number" values of the rows. I bound this textfield to a "total" property of the "RowContainer". Now the problem is how or from where to trigger the recalculation of the "total" property, since this involves a recursive walk on the tree of rows, and I always get a "Collection was mutated while being enumerated" error. I've tried making a method "recalculateTotal", and calling it from the "setNumber" method of the "Row" class , but same error occurs. If I put the recalculation logic in the "total" getter, I can't trigger it to do the math. I'm sure the solution is simple but I can't see it

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• Using TaskDialogIndirect in C#

  - by Dennis Delimarsky

  I've been working for a while with the regular Windows Vista/7 TaskDialog for a while, and I wanted to add some additional functionality (like custom buttons and a footer), so I need to use TaskDialogIndirect. Following the MSDN documentation for TaskDialogIndirect, I got this signature: [DllImport("comctl32.dll",CharSet = CharSet.Unicode,EntryPoint="TaskDialogIndirect")] static extern int TaskDialogIndirect (TASKDIALOGCONFIG pTaskConfig, out int pnButton, out int pnRadioButton, out bool pfVerificationFlagChecked); The TASKDIALOGCONFIG class is shown below: public class TASKDIALOGCONFIG { public UInt16 cbSize; public IntPtr hwndParent; public IntPtr hInstance; public String dwFlags; public String dwCommonButtons; public IntPtr hMainIcon; public String pszMainIcon; public String pszMainInstruction; public String pszContent; public UInt16 cButtons; public TASKDIALOG_BUTTON pButtons; public int nDefaultButton; public UInt16 cRadioButtons; public TASKDIALOG_BUTTON pRadioButtons; public int nDefaultRadioButton; public String pszVerificationText; public String pszExpandedInformation; public String pszExpandedControlText; public String pszCollapsedControlText; public IntPtr hFooterIcon; public IntPtr pszFooterText; public String pszFooter; // pfCallback; // lpCallbackData; public UInt16 cxWidth; } The TASKDIALOG_BUTTON implementation: public class TASKDIALOG_BUTTON { public int nButtonID; public String pszButtonText; } I am not entirely sure if I am on the right track here. Did anyone use TaskDialogIndirect from managed code directly through WinAPI (without VistaBridge or Windows API Code Pack)? I am curious about the possible implementations, as well as the callback declarations (I am not entirely sure how to implement TaskDialogCallbackProc). PS: I am looking for a direct WinAPI implementation, not one through a wrapper.

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• Mocking attributes - C#

  - by bob

  I use custom Attributes in a project and I would like to integrate them in my unit-tests. Now I use Rhino Mocks to create my mocks but I don't see a way to add my attributes (and there parameters) to them. Did I miss something, or is it not possible? Other mocking framework? Or do I have to create dummy implementations with my attributes? example: I have an interface in a plugin-architecture (IPlugin) and there is an attribute to add meta info to a property. Then I look for properties with this attribute in the plugin implementation for extra processing (storing its value, mark as gui read-only...) Now when I create a mock can I add easily an attribute to a property or the object instance itself? EDIT: I found a post with the same question - link. The answer there is not 100% and it is Java... EDIT 2: It can be done... searched some more (on SO) and found 2 related questions (+ answers) here and here Now, is this already implemented in one or another mocking framework?

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• Hiding Command Prompt with CodeDomProvider

  - by j-t-s

  Hi All I've just got my own little custom c# compiler made, using the article from MSDN. But, when I create a new Windows Forms application using my sample compiler, the MSDOS window also appears, and if I close the DOS window, my WinForms app closes too. How can I tell the Compiler? not to show the MSDOS window at all? Thank you :) Here's my code: using System; namespace JTS { public class CSCompiler { protected string ot, rt, ss, es; protected bool rg, cg; public string Compile(String se, String fe, String[] rdas, String[] fs, Boolean rn) { System.CodeDom.Compiler.CodeDomProvider CODEPROV = System.CodeDom.Compiler.CodeDomProvider.CreateProvider("CSharp"); ot = fe; System.CodeDom.Compiler.CompilerParameters PARAMS = new System.CodeDom.Compiler.CompilerParameters(); // Ensure the compiler generates an EXE file, not a DLL. PARAMS.GenerateExecutable = true; PARAMS.OutputAssembly = ot; PARAMS.CompilerOptions = "/target:winexe"; PARAMS.ReferencedAssemblies.Add(typeof(System.Xml.Linq.Extensions).Assembly.Location); PARAMS.LinkedResources.Add("this.ico"); foreach (String ay in rdas) { if (ay.Contains(".dll")) PARAMS.ReferencedAssemblies.Add(ay); else { string refd = ay; refd = refd + ".dll"; PARAMS.ReferencedAssemblies.Add(refd); } } System.CodeDom.Compiler.CompilerResults rs = CODEPROV.CompileAssemblyFromFile(PARAMS, fs); if (rs.Errors.Count > 0) { foreach (System.CodeDom.Compiler.CompilerError COMERR in rs.Errors) { es = es + "Line number: " + COMERR.Line + ", Error number: " + COMERR.ErrorNumber + ", '" + COMERR.ErrorText + ";" + Environment.NewLine + Environment.NewLine; } } else { // Compilation succeeded. es = "Compilation Succeeded."; if (rn) System.Diagnostics.Process.Start(ot); } return es; } } }

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• Hiding Command Prompt with CodeDomProvider

  - by j-t-s

  Hi All I've just got my own little custom c# compiler made, using the article from MSDN. But, when I create a new Windows Forms application using my sample compiler, the MSDOS window also appears, and if I close the DOS window, my WinForms app closes too. How can I tell the Compiler? not to show the MSDOS window at all? Thank you :) Here's my code: using System; namespace JTS { public class CSCompiler { protected string ot, rt, ss, es; protected bool rg, cg; public string Compile(String se, String fe, String[] rdas, String[] fs, Boolean rn) { System.CodeDom.Compiler.CodeDomProvider CODEPROV = System.CodeDom.Compiler.CodeDomProvider.CreateProvider("CSharp"); ot = fe; System.CodeDom.Compiler.CompilerParameters PARAMS = new System.CodeDom.Compiler.CompilerParameters(); // Ensure the compiler generates an EXE file, not a DLL. PARAMS.GenerateExecutable = true; PARAMS.OutputAssembly = ot; PARAMS.CompilerOptions = "/target:winexe"; PARAMS.ReferencedAssemblies.Add(typeof(System.Xml.Linq.Extensions).Assembly.Location); PARAMS.LinkedResources.Add("this.ico"); foreach (String ay in rdas) { if (ay.Contains(".dll")) PARAMS.ReferencedAssemblies.Add(ay); else { string refd = ay; refd = refd + ".dll"; PARAMS.ReferencedAssemblies.Add(refd); } } System.CodeDom.Compiler.CompilerResults rs = CODEPROV.CompileAssemblyFromFile(PARAMS, fs); if (rs.Errors.Count > 0) { foreach (System.CodeDom.Compiler.CompilerError COMERR in rs.Errors) { es = es + "Line number: " + COMERR.Line + ", Error number: " + COMERR.ErrorNumber + ", '" + COMERR.ErrorText + ";" + Environment.NewLine + Environment.NewLine; } } else { // Compilation succeeded. es = "Compilation Succeeded."; if (rn) System.Diagnostics.Process.Start(ot); } return es; } } }

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• Membership Provider users in different tables

  - by Mike

  I have an existing database with users and administrators in different tables. I am rewriting an existing website in ASP.net and need to decide - should I merge the two tables into one users table and just have one provider, OR leave the tables separated and have two different providers. Administrators, they need the ability to create, edit and delete users. I am thinking that the membership/profile provider way of editing users (i.e. System.Web.Profile.ProfileBase pro = System.Web.Profile.ProfileBase.Create("User1"); pro.Initialize("User1", true); txtEmail.Text = pro["SecondaryEmail"].ToString(); is the best way to edit users because the provider handles it? You cannot use this if you have two separate providers? (because they are both looking at different tables). Or should I make a whole lot of methods to edit the users for the administrators? UPDATE: Making a custom membership provider look at both tables is fine, but then what about the profile provider? The profile provider GetPropertyValues and SetPropertyValues would be going on the same set of properties for users and admins. Mike

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• Problem in migrating to LAMP from XAMPP.. Memory limit error

  - by Geshan

  I was using XAMPP for my local machine but as I wanted to run applications like mysql work bench and some test frameworks I decided to switch to LAMP self install. I'm using ubuntu and followed the instructions at: https://help.ubuntu.com/community/ApacheMySQLPHP But the problem is LAMP is consuming too much of my memory (RAM) I've allocated 124 MB currently but still it gives me memory exhausted error when I run Drush (Drupal command line). When I do drush cc to clear cache it give me the following: Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 122880 bytes) in /var/www/----/sites/all/modules/ubercart/uc_order/uc_order.order_pane.inc on line 150 Call Stack: 0.0020 185624 1. {main}() /opt/drush/drush.php:0 0.0254 1303672 2. drush_main() /opt/drush/drush.php:37 0.2674 5107784 3. drush_bootstrap() /opt/drush/drush.php:71 0.2676 5109872 4. _drush_bootstrap_drupal_full() /opt/drush/includes/environment.inc:173 0.2676 5151032 5. drupal_bootstrap() /opt/drush/includes/environment.inc:655 0.3030 7739048 6. _drupal_bootstrap() /var/www/missmoti/includes/bootstrap.inc:989 0.3122 8855792 7. _drupal_bootstrap_full() /var/www/missmoti/includes/bootstrap.inc:1078 0.3445 12387320 8. module_load_all() /var/www/missmoti/includes/common.inc:2608 0.5194 32586544 9. drupal_load() /var/www/missmoti/includes/module.inc:14 0.5251 33361112 10. include_once('/var/www/missmoti/sites/all/modules/ubercart/uc_order/uc_order.module') /var/www/-----/includes/bootstrap.inc:617 Drush command could not be completed. In each error it shows me a back trace and I guess this default debugger I'm not aware of in Apache or my PHP config it eating up the memory. If anyone can help I"d be glad. Another error below: Fatal error: Call to undefined function dsm() in /var/www/-----/sites/all/modules/custom/gtpath/gtpath.module on line 180 Call Stack # Time Memory Function Location 1 0.0002 120144 {main}( ) ../index.php:0 2 1.7604 68224112 theme( ) ../index.php:36 3 2.0188 77346112 call_user_func_array ( ) ../theme.inc:658 4 2.0188 77347024 gtpath_preprocess_page( ) ../theme.inc:0 how do I deal with this default debugger? how do I turn it off??

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• iPhone app rejection for using ICU (Unicode extensions)

  - by nickbit

  I received the following mail form Apple, considering my application: *Thank you for submitting your update to ??µ??es?a to the App Store. During our review of your application we found it is using private APIs, which is in violation of the iPhone Developer Program License Agreement section 3.3.1; "3.3.1 Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs." While your application has not been rejected, it would be appropriate to resolve this issue in your next update. The following non-public APIs are included in your application: u_isspace ubrk_close ubrk_current ubrk_first ubrk_next ubrk_open If you have defined methods in your source code with the same names as the above mentioned APIs, we suggest altering your method names so that they no longer collide with Apple's private APIs to avoid your application being flagged with future submissions. Please resolve this issue in your next update to ??µ??es?a. Sincerely, iPhone App Review Team* The functions mentioned in this mail are used in the ICU library (International Components for Unicode). Although my app is not rejected at this point, I don't feel very secure for the future of my app, because it relies heavily on the Unicode protocol and on this components in particular. Another thing is that I do not call these functions directly, but they are called by a custom 'sqlite' build (with FTS3 extensions enabled). Am I missing something here? Any suggestions?

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• How should I implement lazy session creation in PHP?

  - by Adam Franco

  By default, PHP's session handling mechanisms set a session cookie header and store a session even if there is no data in the session. If no data is set in the session then I don't want a Set-Cookie header sent to the client in the response and I don't want an empty session record stored on the server. If data is added to $_SESSION, then the normal behavior should continue. My goal is to implement lazy session creation behavior of the sort that Drupal 7 and Pressflow where no session is stored (or session cookie header sent) unless data is added to the $_SESSION array during application execution. The point of this behavior is to allow reverse proxies such as Varnish to cache and serve anonymous traffic while letting authenticated requests pass through to Apache/PHP. Varnish (or another proxy-server) is configured to pass through any requests without cookies, assuming correctly that if a cookie exists then the request is for a particular client. I have ported the session handling code from Pressflow that uses session_set_save_handler() and overrides the implementation of session_write() to check for data in the $_SESSION array before saving and will write this up as library and add an answer here if this is the best/only route to take. My Question: While I can implement a fully custom session_set_save_handler() system, is there an easier way to get this lazy session creation behavior in a relatively generic way that would be transparent to most applications?

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• Global.asax Event: Application_OnPostAuthenticateRequest

  - by Hemant Kothiyal

  Hi, I am using Application_OnPostAuthenticateRequest event in global.asax to get roles and permissions of authenticated user also i have made my custom principal class to get user detail and roles and permission. To get some information which remain same for that user. following are the code void Application_OnPostAuthenticateRequest(object sender, EventArgs e) { // Get a reference to the current User IPrincipal objIPrincipal = HttpContext.Current.User; // If we are dealing with an authenticated forms authentication request if ((objIPrincipal.Identity.IsAuthenticated) && (objIPrincipal.Identity.AuthenticationType == "Forms")) { CustomPrincipal objCustomPrincipal = new CustomPrincipal(); objCustomPrincipal = objCustomPrincipal.GetCustomPrincipalObject(objIPrincipal.Identity.Name); HttpContext.Current.User = objCustomPrincipal; CustomIdentity ci = (CustomIdentity)objCustomPrincipal.Identity; HttpContext.Current.Cache["CountryID"] = FatchMasterInfo.GetCountryID(ci.CultureId); HttpContext.Current.Cache["WeatherLocationID"] = FatchMasterInfo.GetWeatherLocationId(ci.UserId); Thread.CurrentPrincipal = objCustomPrincipal; } } My question is as following This event fires every time for every request. Hence for each request the code execute? My approach is right or not? Is it right to add HttpContext.Current.Cache in this event or we should move it on session start

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• Webbased data modelling and management tool

  - by pixeldude

  Is there a web-based tool available, where I am able to... ...define data models (like in a database admin tool) ...fill in data (in custom web forms, not too generic) with basic features like completion ...import data from CSV oder Excel Sheets ...export data to CSV or SQL ...create snapshots of my data models (versions, diff, etc.) ...share my data models ...discuss/collaborate with other people about my data models Well, I can develop something like this in PHP or with Ruby or whatever. But this is such a common task, where the application support could be a lot better. And it would be language and database independent. This would help to maintain data models in different versions and you can maybe share your data models with others, extend it with your team members, etc. There is a website called FreeBase, which allows you to define a data entity model and fill in data, which also has export features, but I need to define my own data model with my own granularity and structure. And it should not be shared in public if I don't want to. How do you solve problems like this yourself?

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• WPF validation red border doesn't show If UserControl collapsed first

  - by Creepy Gnome

  There seems to be a bug with WPF in 3.5, and I was hoping someone may have found a workaround. Basically if you have a custom UserControl that contains a TextBox and it is in a Window but initialized to be Collapsed by default in the xaml or code behind if it fails validation when you make the control visible it will not show the red border until it fails while visible. However, this works correctly when visibility is set to Hidden, just no when Collapsed. I am already overriding the ErrorTemplate with a style to workaround the Adornment issue with the red border staying visibile when you collapse the control. Below is my full style for the TextBox. If there is any additional changes or additions to make it work correctly with collapsed controls that would be great. <Style TargetType="TextBox"> <Setter Property="Margin" Value="3" /> <Setter Property="Validation.ErrorTemplate"> <Setter.Value> <ControlTemplate> <ControlTemplate.Resources> <BooleanToVisibilityConverter x:Key="converter" /> </ControlTemplate.Resources> <DockPanel LastChildFill="True"> <Border BorderThickness="2" BorderBrush="Red" Visibility="{ Binding ElementName=placeholder, Mode=OneWay, Path=AdornedElement.IsVisible, Converter={StaticResource converter}}" > <AdornedElementPlaceholder x:Name="placeholder" /> </Border> </DockPanel> </ControlTemplate> </Setter.Value> </Setter> <Style.Triggers> <Trigger Property="Validation.HasError" Value="true" > <Setter Property="ToolTip" Value="{Binding RelativeSource={RelativeSource Self}, Path=(Validation.Errors)[0].ErrorContent}" /> </Trigger> </Style.Triggers> </Style>

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• how to handle multiple profiles per user?

  - by Scott Willman

  I'm doing something that doesn't feel very efficient. From my code below, you can probably see that I'm trying to allow for multiple profiles of different types attached to my custom user object (Person). One of those profiles will be considered a default and should have an accessor from the Person class. Can this be done better? from django.db import models from django.contrib.auth.models import User, UserManager class Person(User): public_name = models.CharField(max_length=24, default="Mr. T") objects = UserManager() def save(self): self.set_password(self.password) super(Person, self).save() def _getDefaultProfile(self): def_teacher = self.teacher_set.filter(default=True) if def_teacher: return def_teacher[0] def_student = self.student_set.filter(default=True) if def_student: return def_student[0] def_parent = self.parent_set.filter(default=True) if def_parent: return def_parent[0] return False profile = property(_getDefaultProfile) def _getProfiles(self): # Inefficient use of QuerySet here. Tolerated because the QuerySets should be very small. profiles = [] if self.teacher_set.count(): profiles.append(list(self.teacher_set.all())) if self.student_set.count(): profiles.append(list(self.student_set.all())) if self.parent_set.count(): profiles.append(list(self.parent_set.all())) return profiles profiles = property(_getProfiles) class BaseProfile(models.Model): person = models.ForeignKey(Person) is_default = models.BooleanField(default=False) class Meta: abstract = True class Teacher(BaseProfile): user_type = models.CharField(max_length=7, default="teacher") class Student(BaseProfile): user_type = models.CharField(max_length=7, default="student") class Parent(BaseProfile): user_type = models.CharField(max_length=7, default="parent")

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• The uncatchable exception

  - by chaiguy

  Another custom MarkupExtension binding question... This time, my converter is being called before DataContext is set on the target element. This isn't a big deal because it will get updated when DataContext eventually receives a value. What is causing problems is the NullReferenceException I'm getting because of DataContext being null. Even though I'm attempting to catch the exception in my value converter: try { return ( (MethodInfo)_member ).Invoke( parameter, null ); } catch { return Binding.DoNothing; } For some reason the debugger is still halting at this point. Now I'm thinking it could be because the exception is happening in another assembly from where it is being caught (I'm trying to package this in a reusable class library, and _member above points to a method in the application assembly). If I run my little test app without the debugger it works fine, however my application is a little more robust and has general exception handling which is getting triggered because of this. I'm wondering if there is just some attribute or something (or perhaps some reflection parameter I'm missing?) I can use to make the exception be caught like it's supposed to.

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• how to clone the drag-event using jquery and jquery-ui.

  - by zjm1126

  i want to create a new '.b' div appendTo document.body, and it can dragable like its father, but i can not clone the drag event, how to do this, thanks this is my code : <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta name="viewport" content="width=device-width, user-scalable=no"> </head> <body> <style type="text/css" media="screen"> </style> <div id="map_canvas" style="width: 500px; height: 300px;background:blue;"></div> <div class=b style="width: 20px; height: 20px;background:red;position:absolute;left:700px;top:200px;"></div> <script src="jquery-1.4.2.js" type="text/javascript"></script> <script src="jquery-ui-1.8rc3.custom.min.js" type="text/javascript"></script> <script type="text/javascript" charset="utf-8"> $(".b").draggable({ start: function(event,ui) { //console.log(ui) //$(ui.helper).clone(true).appendTo($(document.body)) $(this).clone(true).appendTo($(document.body))//draggable is not be cloned, } }); $("#map_canvas").droppable({ drop: function(event,ui) { //console.log(ui.offset.left+' '+ui.offset.top) ui.draggable.remove(); } }); </script> </body> </html>

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• What issues to consider when rolling your own data-backend for Silverlight / AJAX on non-ASP.NET ser

  - by Edward Tanguay

  I have read-only Silverlight and AJAX apps which read static text and XML files from a PHP/Apache server, which works very nicely with features such as asynchronous loading, lazy-loading only what I need for each page, loading in the background, developed a little query language to get a PHP script to create custom XML files etc. it's pragmatic read-only REST, and all works fast and fine for read-only sites. Now I want to also add the ability to write data from these apps to a database on the same PHP/Apache server. For those of you who have built similar data-access layers, what do I need to consider while building this, especially regarding security so that not just any client can write and alter my database, e.g.: check HTTP_USER_AGENT for security check REMOTE_ADDR for security require a special code for security, perhaps a list of TAN codes (such as banks use for online transactions) each which can only be used once, both the client and server have these I wonder if there is some kind of standard REST query I should lean on for e.g. building SQL-like statements in the URL parameters, e.g. http://www.thedatalayersite.com/query?insertinto=customers&... Any thoughts, notes from experience, ideas, gotchas, especially ideas on tightening down security in this endeavor would be helpful.

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• Synchronizing files between Linux servers, through FTP

  - by Daniel Magliola

  I have the following configuration of servers: 1 central linux server, a VPS 8 satellite linux servers, "crappy shared hostings" I have a bunch of files that I need to have in all servers. Right now i'm copying them everywhere manually, but I want to be able to copy them to the central server, and then have a scheduled process that runs every now and then and synchronizes them (only outwardly, no need to try to find "new" files in the satellite servers). There are a couple of catches though: I can't have any custom software in the satellite servers, or do strange command line things that'll auto connect to them and send the files directly. I know this is the way these kinds of things are normally done, but the satellite servers are crappy shared hosting ones where I have absolutely no control over anything. I need to send the files over FTP I also need to have, in my central server, a list of the files that are available in each of the satellite servers, to make sure they are ready before I send traffic to them. If I were to do this manually, the steps would be: get the list of files in a satellite server compare to my own, and send the files that are missing get the list of files again, and store it in my central database. I'd like to know what tools are out there that can alleviate as much of this as possible, first the syncing, and then the "getting the list of files available in the other server". I'm going to be doing everything from PHP, not sure if there are good tools to "use FTP from PHP", which i'm pretty sure i'll have to do for step 3 at least. Thanks in advance for any ideas! Daniel

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• WPF: Selecting the Target of an Animation

  - by Phil Sandler

  I am trying to create a simple (I think) animation effect based on a property change in my ViewModel. I would like the target to be a specific textblock in the control template of a custom control, which inherits from Window. From the article examples I've seen, a DataTrigger is the easiest way to accomplish this. It appears that Window.Triggers doesn't support DataTriggers, which led me to try to apply the trigger in the style. The problem I am currently having is that I can't seem to target the TextBlock (or any other child control)--what happens is which the code below is that the animation is applied to the background of the whole window. If I leave off StoryBoard.Target completely, the effect is exactly the same. Is this the right approach with the wrong syntax, or is there an easier way to accomplish this? <Style x:Key="MyWindowStyle" TargetType="{x:Type Window}"> <Setter Property="Template" Value="{StaticResource MyWindowTemplate}"/> <Style.Triggers> <DataTrigger Binding="{Binding ChangeOccurred}" Value="True"> <DataTrigger.EnterActions> <BeginStoryboard> <Storyboard BeginTime="00:00:00" Duration="0:0:2" Storyboard.Target="{Binding RelativeSource={RelativeSource AncestorType=TextBlock}}" Storyboard.TargetProperty="(Background).(SolidColorBrush.Color)"> <ColorAnimation FillBehavior="Stop" From="Black" To="Red" Duration="0:0:0.5" AutoReverse="True"/> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger> </Style.Triggers> </Style>

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• Possible to have multiple Profiles in ASP.NET for different users?

  - by asple

  My application has a few different user types with their own members. For example, I have the student user as well as the teacher user. I authenticate my users through active directory in my custom MembershipProvider's ValidateUser method. While querying AD, I pull out all their relevant information. I'd like to put that information into a Profile, but from what I've read and the examples I've sen, you can only define a single Profile (like so): <profile defaultProvider="CustomProfileProvider" enabled="true"> <properties> <add name="YearLevel" type="String" /> <add name="Name" type="String" /> <add name="Age" type="String" /> </properties> </profile> The above profile would work for a student, but not for a teacher, who does not have a value for "YearLevel" in AD. Is it possible to have multiple profiles to accomplish this? Or is it easier to add all properties from AD spanning all user types, then in my code, just check what user type they are and then access their specific properties?

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