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  • MSDN Example of handling an exception from the TPL - Is this a race condition?

    - by David
    I'm looking at the TPL exception handling example from MSDN @ http://msdn.microsoft.com/en-us/library/dd537614(v=VS.100).aspx The basic form of the code is: Task task1 = Task.Factory.StartNew(() => { throw new IndexOutOfRangeException(); }); try { task1.Wait(); } catch (AggregateException ae) { throw ae.Flatten(); } My question is: Is this a race condition? What happens if task1 throws before the try has executed? Am I missing something that stops this being a race? Shouldn't it be written like this instead: try { Task task1 = Task.Factory.StartNew(() => { throw new IndexOutOfRangeException(); }); task1.Wait(); } catch (AggregateException ae) { throw ae.Flatten(); }

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  • Winforms Hotkey, Help?

    - by Di4g0n4leye
    namespace WebBrowser { public partial class MainForm : Form { public MainForm() { InitializeComponent(); } int GetPixel(int x, int y) { Bitmap bmp = new Bitmap(1, 1, PixelFormat.Format32bppPArgb); Graphics grp = Graphics.FromImage(bmp); grp.CopyFromScreen(new Point(x,y), Point.Empty, new Size(1,1)); grp.Save(); return bmp.GetPixel(0, 0).ToArgb(); } void Button1Click(object sender, EventArgs e) { int x = Cursor.Position.X; int y = Cursor.Position.Y; int pixel = GetPixel(x,y); textBox1.Text = pixel.ToString(); } void MainFormLoad(object sender, EventArgs e) { webBrowser1.Navigate("http://google.com"); } } } } i want to add a hotkey that call Button1 on Press, How can that be done?

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  • Writing a rails validator with integer

    - by user297008
    I was trying to write a validation for Rails to ensure that a price entered on a form was greater than zero. It works…sort of. The problem is that when I run it, val is turned into an integer, so it thinks that .99 is less than .1. What's going on, and how should I fix the code? class Product < ActiveRecord::Base protected def self.validates_greater_than_zero(*attr_names) validates_each(attr_names) do |record, attr, val| record.errors.add(attr, "should be at least 0.01 (current val = #{val.to_f})") if val.nil? || val < 0.01 end end public validates_presence_of :title, :description, :image_url validates_numericality_of :price validates_greater_than_zero :price end

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  • ASP.NET MVC SSL POST Error

    - by RyanFetz
    I have a Logon page in a MVC (1.0) application that I am securing with SSL, I have an attribute that inspects the request for the page and redirects to a https uri when it is requested with http. This all works, however when I post the form content i get the following error: The parameters dictionary contains a null entry for parameter 'rememberMe' of non-nullable type 'System.Boolean' for method 'System.Web.Mvc.ActionResult LogOn(System.String, System.String, Boolean, System.String)' in 'DAC.US.Web.Portal.Controllers.AccountController'. To make a parameter optional its type should be either a reference type or a Nullable type. Parameter name: parameters here is the controller code... // // GET: /Account/LogOn [RequiresSSL] public ActionResult LogOn(string ReturnUrl) { if (TempData["Message"] != null) ViewData["Message"] = TempData["Message"]; TempData["Message"] = null; ViewData["ReturnUrl"] = ReturnUrl ?? "/Home"; return View(); } Again, the RequireSSL Attribute works, but the POST from that SSL uri does not. What is not working?

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  • OSLO, ANTLR or other parser grammar, for parsing QUERY EXPRESSION

    - by Jay Allard
    Greetings I'm working on a project that requires me to write queries in text form, then convert them to some easily processed nodes to be processed by some abiguous repository. Of everything there, the part I'm least interested is the part that converts the text to nodes. I'm hoping it's already done somewhere. Because I'm making stuff up as I go, I chose to use a LINQish expression syntax. from m in Movie select m.A, m.B I started parsing it manually and got the basics, but it's pretty cheesy. I'm looking for the better solution. I made some progress using MGrammar, but it would be nice if such a thing already existed. Does anyone know of anything that already does this? I looked for existing ANTLR templates, but no luck. Thanks for the help.

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  • Error with Ajax.Beginform on ASP.NET MVC Page

    - by Rupa
    Hi I am using Ajaxy Call to load the partial view. It is working fine in Firefox and IE without in Debug Mode. But in Debug mode, I am getting the follwoing error: Error: 'Sys' is undefined Ajaxy call Code: <% using (Ajax.BeginForm("SearchResults", new AjaxOptions { UpdateTargetId = "divLoadSearchResults" } )) {%> HTML View Source corresponding to this: <form action="/Home/SearchResults" method="post" onclick="***Sys.***Mvc.AsyncForm.handleClick(this, new Sys.UI.DomEvent(event));" onsubmit="Sys.Mvc.AsyncForm.handleSubmit(this, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, updateTargetId: 'divLoadSearchResults' });"> I am using MVC RC2 framework. Anyone have similar problems with RC2? If it is not in Debug mode, it is working fine. Again, if i run it using Debug mode or CTRL+F5, it shows up the error. Appreciate your responses.

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  • Guessing the time zone from an arbitrary "location" string?

    - by Thomas
    I'm trying to run some statistics over the Stack Overflow data dump, and for that I would like to know the time zone for each user. However, all I have to go on is the completely free-form "location" string. I'll stress that I'm only looking for an approximation of the time zone; of course, in general this is an unsolvable problem. However, many people fill out their country, state and/or city, which should give a pretty good indication. It's okay if it fails for other cases. It doesn't have to be reliable, it doesn't have to be accurate, it doesn't have to cover all bases. I don't want to waste too much time on this, so I'm wondering if there is some code out there that can make a reasonable guess. Any language, platform, API or library goes. Any ideas?

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  • multiple records using the select_tag

    - by JZ
    I'm attempting to display multiple records, with each record displaying its own selection box. I would like to submit this form and pass a hash, having the Add.id function as the key of the hash, and the selection box option pass as the information in the hash. How could I fix my code? is this even possible with the select_tag method? <%= form_tag yardsign_adds_path, :method => :post do %> <%= select_tag "support_code[]", options_for_select([[ "1 - Strong Supporter", add.id ], [ "2 - Likely Voter" ], [ "3 - Undecided" ], [ "4 - Likely Opposed" ], [ "5 - Strongly Opposed" ]]) %> <%= submit_tag "Update" %> <% end %> Current terminal output: Started POST "/adds/yardsign" for 127.0.0.1 at 2010-04-17 01:36:03 Processing by AddsController#yardsign as HTML Parameters: {"commit"=>"Update", "authenticity_token"=>"VQ2jVfzHI7pB+87lQa9NWqvUK3zwJWiJE7CwAnIewiw=", "support_code"=>["1", "3 - Undecided", "3 - Undecided"]}

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  • jcaptcha integration with struts

    - by xain
    Hi, I'm trying to interate a struts 1.3.8 app with jcaptcha-1.0; I added the jcaptcha jar to the app lib and added <%@ taglib uri="jcaptcha" prefix="jcaptcha"%> to my form The app couldn't find the file, so I added the following to the web.xml file <taglib-uri>jcaptcha</taglib-uri> <taglib-location>/WEB-INF/lib/jcaptcha-1.0-all.jar</taglib-location> </taglib> And now I get the null pointer exception: org.apache.jasper.JasperException: Unable to read TLD "META-INF/taglib.tld" from JAR file Any clues ? Thanks

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  • Implicitly invoking parent class initializer

    - by Matt Joiner
    class A(object): def __init__(self, a, b, c): #super(A, self).__init__() super(self.__class__, self).__init__() class B(A): def __init__(self, b, c): print super(B, self) print super(self.__class__, self) #super(B, self).__init__(1, b, c) super(self.__class__, self).__init__(1, b, c) class C(B): def __init__(self, c): #super(C, self).__init__(2, c) super(self.__class__, self).__init__(2, c) C(3) In the above code, the commented out __init__ calls appear to the be the commonly accepted "smart" way to do super class initialization. However in the event that the class hierarchy is likely to change, I have been using the uncommented form, until recently. It appears that in the call to the super constructor for B in the above hierarchy, that B.__init__ is called again, self.__class__ is actually C, not B as I had always assumed. Is there some way in Python-2.x that I can overcome this, and maintain proper MRO when calling super constructors without actually naming the current class?

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  • The handle is invalid when loading file or assembly AjaxControlToolkit

    - by Dharmik Bhandari
    I'm having one error repeatedly. The site is on ASP.NET 2.0 web form. There is no pattern to reproduce this error again because it occurs sometimes and it resolve by adding blank space at end of the in web.config. What could be the problem? Server Error in '/' Application. The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE)) Exception Details: System.Runtime.InteropServices.COMException: The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE)) [COMException (0x80070006): The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE))] [FileLoadException: Could not load file or assembly 'AjaxControlToolkit, Version=3.0.30930.28736, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE))] [ConfigurationErrorsException: Could not load file or assembly 'AjaxControlToolkit, Version=3.0.30930.28736, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE))] System.Web.Configuration.CompilationSection.LoadAssemblyHelper(String assemblyName, Boolean starDirective) +613

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  • Setting the content-type of requests performed by jQuery jqGrid

    - by Nigel
    I am using the latest version of jqGrid: 3.6.4 This seems like a simple problem (or at least it did before I spent a few hours on it): When the grid sends a request to the server (to a controller action), its content-type is always: application/x-www-form-urlencoded; charset=UTF-8 and I would like it to be: application/json; charset=utf-8 but I can find no way of setting the content-type (there is no contentType option as you would find on a $.ajax call for example). So just to clarify, I am not asking how to set the content-type on a jQuery server request, but specifically using jqGrid, which does not provide an obvious option for doing this. Thanks, Nigel.

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  • Scrolling textboxes programmatically using WndProc messages.

    - by Hannes Nel
    Hi, I'm trying to scroll a textbox using the form's WndProc method. The code I've come up with so far, after scouring the internet, looks like this: private void ScrollTextBox() { scrollMessage = Message.Create(TabContents.Handle, 0x00B6, new IntPtr(0x0003), new IntPtr(0x0000)); this.WndProc(ref scrollMessage); } where TabContents is a TextBox. For some reason, nothing happens when i call this method. I'd like to know why. I realise that i can accomplish the same with the MoveToCaret method, but I'm curious why this is not working.

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  • Can Cython compile to an EXE?

    - by ThantiK
    I know what Cythons purpose is. It's to write compilable C extensions in a Python-like language in order to produce speedups in your code. What I would like to know (and can't seem to find using my google-fu) is if Cython can somehow compile into an executable format since it already seems to break python code down into C. I already use Py2Exe, which is just a packager, but am interested in using this to compile down to something that is a little harder to unpack (Anything packed using Py2EXE can basically just be extracted using 7zip which I do not want) It seems if this is not possible my next alternative would just be to compile all my code and load it as a module and then package that using py2exe at least getting most of my code into compiled form, right?

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  • jquery loop to create elements

    - by Andy Simpson
    Dear all, I have had no luck with this task so far so grateful for any help. I have an html form, in which there is a small select menu (1-10) ie <select> <option value = '1'>1</option> <option value = '2'>2</option> ... <option value = '10'>10</option> </select> depending on what value is selected i would like jquery to create (or remove) that number of input text boxes (with different names and id's). eg if 2 was selected these inputs would be created: <input type = 'text' name = 'name1' id = 'id1' /> <input type = 'text' name = 'name2' id = 'id2' /> i look forward to your no doubt simple and elegant solutions! andy

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  • Can't connect to Office Communication Server through Unified Communications API

    - by Robin Clowers
    I am trying to connect to Office Communication Server using the Unified Communications Managed API. I have tried my user and a fresh user enabled for OCS. Both account can successfully log into the Office Communicator client, but fail using the API. When creating the network credential, if I pass in the username in the form domain\username, I get this error: SupportedAuthenticationProtocols=Ntlm, Kerberos Realm=SIP Communications Service FailureReason=InvalidCredentials ErrorCode=-2146893044 Microsoft.Rtc.Signaling.AuthenticationException: The log on was denied. Check that the proper credentials are being used and the account is active. ---> Microsoft.Rtc.Internal.Sip.AuthException: NegotiateSecurityAssociation failed, error: - 2146893044 If I leave off the domain in the username I this error: ResponseCode=404 ResponseText=Not Found DiagnosticInformation=ErrorCode=4005,Source=OCS.mydomain.com,Reason=Destination URI either not enabled for SIP or does not exist

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  • Spring validator default message codes not resolving

    - by Derek Clarkson
    Hi all, I have a custom spring validator which has the following default message: public @interface FieldMatch { String message() default "au.com.xxx.website.FieldMatchValidation"; ... The problem I'm having is that the message code is not being resolved and <form:error...> is simply displaying the code rather than the message (Which is in a properties file which is being used by a ResourceBundleMessageSource). I've also tried this as String message() default "{au.com.xxx.website.FieldMatchValidation}"; Which causes the message source to crash with an exception indicating that it thinks that the "{}" brackets should contain a number because it thinks it's a parameter place holder. I think that the issue is that the message code is not being seen as a message code and therefore not resolved, but I cannot figure out why. Any suggestions?

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  • request parameter is taking null value in servlets

    - by Dusk
    Hi, I want to know how can I get the value of the request parameters "j_username" and "j_password"? After successfully login using form based authentication, I want my servlet to get the value of parameters "j_username" and "j_password", but I'm getting null as the value in both parameters. Could anyone please tell me how can I get the actual value of both paramters? Servlets class : package foo; import javax.servlet.http.*; import javax.servlet.*; public class RequestHandler extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) { try { String user = request.getParameter("j_username"); String password = request.getParameter("j_password"); response.getWriter().println(user+" "+password); } catch(Exception e) { e.printStackTrace(); } } } output: null null

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  • how to design a complex webreport in DevExpress XtraReport?

    - by ahmed
    Hello , I have to design a complex webreport with DevExpress Xtrareport .I have to pull data from 40 different tables on user selection and show on the Report. So I have designed in this way. On the design form I am giving the user to select the department section and project. with three dropdowns A) select the report , B) Sort by , C)Filter By A) Select the report contains different types like family status, insurance type etc ..total 40 types. B) Sort by will contain by employee number, date of birth , Salary , and many more C) Filter by will contain like employee on vacation, or employee terminated etc etc. Now for a single webreport I am first taking a DataSource and binding data to labels. to achieve the above webreport I have to take 40 different Datasource and I have to assign to the labels? Should I be doing this?

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  • Variable naming for arrays/lists/collections - C#

    - by David Neale
    What should I call a variable instantiated with some type of array? Is it okay to simply use a pluralised form of the type being held? IList<Person> people = new List<Person>(); or should I append something like 'List' to the name? IList<Person> personList = new List<Person>(); Is it generally acceptable to have loops like this? foreach(string item in items) { //Do something }

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  • wpf trigger events after a few milli-seconds!!!

    - by Rev
    Hi What was that "wpf trigger events after a few Milli-seconds" ;) Let me explain about that: I have a wpf form with few controls. some of these control over-writing template. for example a textblock with an effect will be trigger on Mouse-Enter event and change color of foreground to something else. But after running program when mouse enter on textBloc, it takes a few Milli-seconds until Mouse-enter event triggers. also all control or better say all control which use mouse-events have this problem. How solve this problem???

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  • ShowDialog won't run

    - by clawson
    I've come across a situation where I try to run a simple line of code in a method Dim res As DialogResult = frmOptions.ShowDialog() but nothing happens. The dialog box will not appear. If I run this method from another location in the code it executes fine (i.e. displays the form in dialog mode and code executes fine thereafter). Hence, it may be the way in which I arrive at this code that is causing my problem, but I cannot see to find what is wrong. When I pause the debugger the line of code is highlighted in green but I can't see to step over it or into it. Any idea what may cause this to happen, or what I should be looking for that might be causing the problem?? Thanks for the help!

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  • fastercsv parsing to int or other into ActiveRecord

    - by Schroedinger
    I'm currently importing a CSV into an activerecord element but can't choose to parse the elements as say ints or decimals on a case by case basis using fastercsv. I can either choose to parse everything as an int or the other, or all as strings. I need to parse some columns as ints, some as decimals and some as strings. Otherwise, is there a way after I've parsed everything as strings to convert and update individual elements in the activerecord to the new form? Say parse values in as strings then convert certain values to ints, others to decs, etc?

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  • store everything only once, smarter

    - by hsmit
    In the digital world a lot is stored multiple times. As a thought experiment or creative challenge I want you to think about making this more efficient and maybe reuse more. Think of the following cases: an mp3 track is downloaded multiple times, copied over various devices on website a login form is often rebuild many times, why not reuse more code? words themselves are used many times questions and answers are accidentally saved at many places in parallel images or photos often describe the same data (Eiffel tower, Golden gate, Taj Mahal) etc etc Are you aware of solutions? Or are you thinking about similar topics? Ideas? Blueprints? I'd love to hear from you!

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  • Graph coloring Algorithm

    - by Amitd
    From wiki In its simplest form, it is a way of coloring the vertices of a graph such that no two adjacent vertices share the same color; this is called a vertex coloring. Similarly, an edge coloring assigns a color to each edge so that no two adjacent edges share the same color, and a face coloring of a planar graph assigns a color to each face or region so that no two faces that share a boundary have the same color. Given 'n' colors and m vertices, how easily can a graph coloring algorithm be implemented? Lan

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