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• Silverlight authentication during startup - how to mimic syncronous behavior?

  - by jkohlhepp

  I have a Silverlight app that is using the MVVM pattern. I have a WCF service which will allow me to authenticate users (I don't have direct control over that service - assume it is a black box that just returns me the user info and a list of privileges the user has). So, when the app starts up, I want to pull security data from that service. Right now, when I do this, my views and view models can end up getting initialized before the service returns with the security data. This causes problems because the view models need to disable buttons and make things visible/invisible based on the user having certain privileges. Is there a pattern that allows me to prevent the initialization of the views / view models until the WCF call has returned? How would you go about solving this problem as elegantly as possible?

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• The accossoryView of a UITableViewCell disappears after the visible view is changed

  - by Luca

  Hi! I'm experiencing this strange situation. I have a UITableView where, when the user selects a cell, a long (network) process begins. So, I performed this in a background thread and I placed (in the didSelectRowAtIndexPath) a UIActivityIndicatorView as the accessory view. This is what I wrote: UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath]; UIActivityIndicatorView* activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; cell.accessoryView = activityView; [activityView startAnimating]; [activityView release]; everything seems to work correctly, except that, if during a loading process (when the indicator is animated), I switch the view using a UITabBar, when I go back to the UITableView, the UIActivityIndicatorView that should still be there has disappeared. Any idea of what I did wrong? Thanks!

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• basic sql group by with percentage

  - by David in Dakota

  I have an issue and NO it is not homework, it's just a programmer who has been away from SQL for a long time having to solve a problem. I have the following table: create table students( studentid int identity(1,1), [name] varchar(200), [group] varchar(10), grade numeric(9,2) ) go The group is something arbitrary, assume it's the following "Group A", "Group B"... and so on. The grade is on a scale of 0 - 100. If there are 5 students in each group with grades randomly assigned, what is the best approach to getting the top 3 students (the top 80%) based on their grade? To be more concrete if I had the following: Ronald, Group A, 84.5 George H, Group A, 82.3 Bill, Group A, 92.0 George W, Group A, 45.5 Barack, Group A, 85.0 I'd get back Ronald, Bill, and Barack. I'd also need to do this over other groups.

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• refresh table view iphone

  - by Florent

  Hi all !! So i've set a table view, i have set a system which set if the row have been already selected, i set checkmarck acessory for a row which have been seen, i write the row in a plist to an int value. It work good but only when i restart the app or reload the table view in my navigation controller. I mean when i select a row it pushes a view controller, then when i go back to the table view checkmark disappear and we do not know if the row have already been selected only when the app restart. So is there a way to refresh the table view ? ? in the view will appear for example ? ? thanks to all !!!!

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• Comparing Clojure books

  - by Michiel Borkent

  Currently there is (afaik) one completed Clojure book available: Programming Clojure by Stuart Halloway. Two are being written and partially available at Manning: The Joy of Clojure by Fogus and Houser Clojure in Action by Amit Rathore Another one is about to be published in May: Practical Clojure (The Definitive Guide) by Luke Van der Hart Are these books more or less the same and meant as a general introduction to Clojure? Does it make sense to buy them all, or is there a risk of having three very similar books? Will there be books that go into more specialized areas of Clojure and targetted for 'intermediate' or 'advanced' Clojure programmers?

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• ASP.NET MVC Validation of ViewState MAC failed

  - by Kevin Pang

  After publishing a new build of my ASP.NET MVC web application, I often see this exception thrown when browsing to the site: System.Web.Mvc.HttpAntiForgeryException: A required anti-forgery token was not supplied or was invalid. --- System.Web.HttpException: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. --- System.Web.UI.ViewStateException: Invalid viewstate. This exception will continue to occur on each page I visit in my web application until I close out of Firefox. After reopening Firefox, the site works perfectly. Any idea what's going on? Additional notes: I am not using any ASP.NET web controls (there are no instances of runat="server" in my application) If I take out the <%= Html.AntiForgeryToken % from my pages, this problem seems to go away

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• Facebook fan page canvas source?

  - by Andre

  Im trying to understand how to learn reading the source of a facebook fan page. So far, I can only get the layout displayed while viewing the source. Here is an example: If you go here: http://www.facebook.com/pages/See-oho-nieps-YothG-RRofiLe/106340746065367#!/pages/Milton-Keynes-United-Kingdom/IF-MR-BEAN-WAS-IN-AVATAR-HE-WOULD-LOOK-LIKE-THIS/302690570115 That canvas page requires you to be a fan of the page. This is done with: content here My question is, why cant I find the FB:visible code in the source of that page? I would be grateful for any guidance!

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• winsock compile error

  - by ioil

  The following errors are from a file with just windows and winsock2 included. C:\Users\ioil\Desktop\dm\bin>dmc sockit.c typedef struct fd_set { ^ C:\Users\ioil\Desktop\dm\bin\..\include\win32\WINSOCK2.H(85) : Error: 'fd_set' is already defined } fd_set; ^ C:\Users\ioil\Desktop\dm\bin\..\include\win32\WINSOCK2.H(88) : Error: identifier or '( declarator )' expected struct timeval { ^ C:\Users\ioil\Desktop\dm\bin\..\include\win32\WINSOCK2.H(129) : Error: 'timeval' is already defined }; ^ C:\Users\ioil\Desktop\dm\bin\..\include\win32\WINSOCK2.H(132) : Error: identifier or '( declarator )' expected struct hostent { ^ C:\Users\ioil\Desktop\dm\bin\..\include\win32\WINSOCK2.H(185) : Error: 'hostent' is already defined Fatal error: too many errors --- errorlevel 1 C:\Users\ioil\Desktop\dm\bin> What's already been tried : placing the winsock.dll file in the same directory as the compiler and program to be compiled, placing it in the system32 directory, and entering it in the registry with the regsrv32 command. Don't really know where to go from here, appreciate any advice . . .

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• Django admin urls return INVALID REQUEST! - Django

  - by RadiantHex

  Hi folks, my admin urls are sat behind a prefix by doing the following. 1# (r'^admin/', include(admin.site.urls)), is placed within urls_core.py 2# (r'^api/', include('project.urls_core')), is palced within urls.py All admin URLs work fine except app indexes. If I go to any URL such as: /api/admin/core/ /api/admin/registration/ /api/admin/users/ /api/admin/filters/ I receive 'INVALID REQUEST' as my response. Status code is 200 (OK) though. I have never received this error message before. Does anyone have a clue? Thanks guys!

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• How to determine direction of navigation from IE WebBrowser (IHtmlWindow2 or Javascript)

  - by Geoff Cox

  I'm uisng the WPF Web Browser control and when it fires the Navigating event, the event args always contain NavigationMode.New. It should be set to NavigationMode.Back if the user chooses to 'Go Back' from the web control. So its off to the COM ActiveX control underneath to determine the direction of navigation. I've been looking at IHtmlWindow2 and IHtmlDocument2 and IOmHistory, but don't see anything that happens on navigation to tell me if the navigation is caused by going back, forward, a new address, or a refresh. Since IHtmlWindow and Javascript have the same DOM, maybe someone knows how from Javascript. I've also been looking at the IWebBrowser2 interface, but can't find anything there either. Is there an event or property I need to inspect?

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• How do you develop Visual Studio Add-Ins?

  - by devoured elysium

  I have a vague idea Visual Studio allows you to run a second sandboxed instance where the add-in is being in fact loaded. That'd allow you to debug your add-in code and such. Is this effectively possible? How would I go about doing that? I'm currently using a single instance of Visual Studio. I'm having the problem that as I load and run the add-in, it won't allow me to compile again until I restart that instance of Visual Studio as there seems to be no way to unload the add-in. Even using two instances of Visual Studio wouldn't really help in here. There must be an easier way, how do you guys do it? Thanks

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• WWSAPI and setting "soapenv:Header" values

  - by Ben Burnett

  I'm trying to connect to a web service from a C++ app using WWS. I got the base connection working just fine. My XML message has two parts though, a header (soapenv:Header) and a body (soapenv:Body). the generated functions only fill in the body. How do I set the Header information? I assumed it has something to do with WsSetHeader() or WsAddCustomHeader() but can't seam to find the right values to use in the parameters. Can someone point me in the right direction here? I've been googling and trying to research this now for several days and am finding many sources for basic help with WWSAPI, but nothing seams to go deeper into how to use it for more advanced applications. any good links or resources to find more advanced help on WWSAPI? Thanks, --Ben Burnett www.burnett.ws

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• How get Android 2.1 SDK to recognize new class: SignalStrength

  - by Doughy

  The new Android 2.1 SDK (version 7) has a new class called SignalStrength: http://developer.android.com/reference/android/telephony/SignalStrength.html I updated my SDK in Eclipse to include the 2.1 add-on, and now I am trying to use this new class. However, when I go to do an import android.telephony.SignalStrength, it can't find it. Do I have to somehow reset my project to refresh the SDK so it knows about the new libraries? How can I get it to recognize this new class? Thanks.

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• Getting a sent MailMessage into the "Sent Folder"

  - by Robert Reid

  I'm sending MailMessages with an SmtpClient (being delivered successfully) using an Exchange Server but would like my sent emails to go to the Sent Folder of the email address I'm sending them from (not happening). using (var mailMessage = new MailMessage("[email protected]", "[email protected]", "subject", "body")) { var smtpClient = new SmtpClient("SmtpHost") { EnableSsl = false, DeliveryMethod = SmtpDeliveryMethod.Network }; // Apply credentials smtpClient.Credentials = new NetworkCredential("smtpUsername", "smtpPassword"); // Send smtpClient.Send(mailMessage); } Is there a configuration I'm missing that will ensure all of my sent emails from "[email protected]" arrive in their Sent Folder?

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• Current date in rails form

  - by Dean

  Hi, Im learning rails and exploring a bit away from the book and creating a simple application with added functionality as i increase my knowledge. Im writing a simple blog application and i have a field in the form called date added, i don't want this to be a field i want it to get the date from the server and place it in to the database automatically. How would i go about doing this? I was thinking of a hidden field but then unsure on how to process the date and insert it to the hidden field. Is this the wrong way of going about things? Thanks in Advance, Dean

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• How do I give each test its own TestResults folder?

  - by izb

  I have a set of unit tests, each with a bunch of methods, each of which produces output in the TestResults folder. At the moment, all the test files are jumbled up in this folder, but I'd like to bring some order to the chaos. Ideally, I'd like to have a folder for each test method. I know I can go round adding code to each test to make it produce output in a subfolder instead, but I was wondering if there was a way to control the output folder location with the Visual Studio unit test framework, perhaps using an initialization method on each test class so that any new tests added automatically get their own output folder without needing copy/pasted boilerplate code?

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• How do I create a new folder and deploy files to the 12 hive using VseWSS 1.3?

  - by Nathan DeWitt

  I have created a web part using VSeWSS 1.3. It creates a wsp file and my web part gets installed, everything works great. I would like to also create a folder in the LAYOUTS directory of the 12 hive and place a couple files in there. How do I go about doing this? I know that I can manually place the files there, but I would prefer to have it all done in one fell swoop when I uses stsadm to install my solution. Is there a best practices guide out there for using VSeWSS 1.3 to do this? They changed a bunch of stuff with this new version and I want to make sure I don't mess anything up.

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• Editing history in bash

  - by nameanyone

  In bash, when I go back in history, edit some command and run it, this edited command is appended to history and the original one is left intact. But every once in a while I somehow manage to affect the original command, i.e. my edit replaces the original command back in history. I can't put my finger on how this happens. Can someone explain? My goal is to avoid this, so any edit to a previous command always gets appended to history and never replaces the original.

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• learning the Lower levels of computing

  - by Ben

  I am a software developer with four years experience in .Net development, I always like to keep up to date with the latest technologies (.net related normally) being released and love learning them. I didn't however go to university and learnt all I know through helpful colleagues, .Net courses, the internet and good old books. I feel that I am a good developer, but without learning the lower levels of a computer as you would in the first year of a computer related Uni course, I get lost when talking to people about a lot of more technical lower level computing. Is there a book(s) that anyone could recommend, that would cover the lower levels of what is going on when I click "Run" in Visual Studio? I feel out of my depth when my boss says to me "Thats running in the CPU cache" or "you're limited by disk reads there", and would like to feel more confident when talking about how the hardware talks to each other (CPU to RAM etc). Apologise if thats a vague question, or has been asked before (i did check and couldn't find anything on here that answers my question).

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• layout problam in android

  - by mahdi

  Hi i try show layout like image 1 (textView and editText in same line) but my out put shown like image 2 ! i try with this code : <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="5px" > <TextView android:id="@+id/label" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="URL:" android:layout_alignBaseline="@+id/entry" android:layout_alignParentLeft="true"/> /> <EditText android:id="@+id/entry" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_toRightOf="@id/label" android:layout_alignParentTop="true" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:paddingRight="30px" android:paddingLeft="30px" android:text="Go..." /> </LinearLayout> please help me thanks

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• How do you redeploy javascript in Idea when using a Tomcat configuration

  - by Jonny Leeds

  I'm working on a java/javascript webapp that runs on tomcat. We're working with IDEA and I've managed to get debugging set up for both the client and server code at the same time, which is great. I did have hot redeployment of the javascript set up when running Tomcat manually, however I find when running Tomcat through IDEA this doesnt work as it's setting stuff up somewhere in my users folder. I was going to just set up a deployment configuration to go to that folder but I can't see any of the javascript files in there. Is it possible to get the best of both worlds and have debugging and automatic deployment working together?

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• How to use strange characters in a query string

  - by peter

  I am using silverlight / ASP .NET and C#. What if I want to do this from silverlight for instance, // I have left out the quotes to show you literally what the characters // are that I want to use string password = vtakyoj#"5 string encodedPassword = HttpUtility.UrlEncode(encryptedPassword, Encoding.UTF8); // encoded password now = vtakyoj%23%225 URI uri = new URI("http://www.url.com/page.aspx@password=vtakyoj%23%225"); HttpPage.Window.Navigate(uri); If I debug and look at the value of uri it shows up as this (we are still inside the silverlight app), http://www.url.com?password=vtakyoj%23"5 So the %22 has become a quote for some reason. If I then debug inside the page.aspx code (which of course is ASP .NET) the value of Request["pasword"] is actually this, vtakyoj#"5 Which is the original value. How does that work? I would have thought that I would have to go, HttpUtility.UrlDecode(Request["pswd"], Encoding.UTF8) To get the original value. Hope this makes sense? Thanks.

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• Hiding Row in DataGridView Very Slow

  - by Ed Schwehm

  I have a DataGridView in a Winforms app that has about 1000 rows (unbound) and 50 columns. Hiding a column takes a full 2 seconds. When I want to hide about half the rows, this becomes a problem. private void ShowRows(string match) { this.SuspendLayout(); foreach (DataGridViewRow row in uxMainList.Rows) { if (match == row.Cells["thisColumn"].Value.ToString())) { row.Visible = false; } else { row.Visible = true; } } this.ResumeLayout(); } I did some testing by adding by addingConsole.WriteLine(DateTime.Now)around the actions, androw.Visible = falseis definitely the slow bit. Am I missing something obvious, like setting IsReallySlow = false? Or do I have to go ahead and enable Virtual Mode and code up the necessary events?

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• Delphi overwrite existing file on save dialog

  - by AfterImage

  Hello everyone, I am using the TSaveDialog component to save a file from a button click. However, I am having trouble with saving on an existing file name. Generally, when you want to save over an existing file in Windows, a message box pops up asking you if you really want to overwrite the file. This is not the case with the TSaveDialog component and it will go ahead and write over the file without asking. I was hoping there was a TSaveDialog function or event that I could use but I have not seen anything that looks like it handles this. So it could be that I simplely haven't found the correct method to use. If there is an event, I could use if FileExists(saveDialog.FileName) then //and so forth but the events TSaveDialog has are OnCanClose, OnClose, OnFolderChange, OnIncludeItem, OnSelectionChange, OnShow, OnTypeChange... My question is, how do I pop up a message box to ask the user if they want to overwrite the existing file using the TSaveDialog component. Thanks.

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• MSDN Subscription Site Down?

  - by Vaccano

  I am not sure that this is an SO worthy question. (At least it is not like ones I normally ask.) But I can't get my MSDN Subscription to work any more. Is anyone else having this issue? When I log in and select "My Account" I get this: and when I try to download I get this: I have asked other developers that I know and it is broken for them too. But before I go digging into this, it would be nice to know if this is a me/us issue or an everyone issue. Also, if I am breaking the rules by posting this here let me know and I will delete it. Thanks.

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