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• Best practices for launching a new software version

  - by steve

  I rebuilt a web app to replace a version that we have been using for the last 3-4 years. We have a few thousand clients and a few hundred active users per day. The functionality is basically the same. The new version is a little bit faster with a few enhancement features and there are a lot of behind the scenes changes that the clients will never see. The UI is quite different but ultimately much easier to use and navigate. How should I go about having our clients stop using the old system and start using the new one? I am currently putting together a video that will play on the web site as well as within the app. The video will go through the pages and focus on some key changes. I was also thinking about an intro page that will display once the user logs in and explains some of the features.

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• How to draw unlimited FPS on Mac OS X with OpenGL?

  - by V1ru8

  I d'like to draw as many frames as possible with OpenGL on Mac OS X to measure the performance on different scenes. What I've tried so far: Using a CVDisplayLink that has NSOpenGLCPSwapInterval set to 0, so it does not sync with the Display. But with that it's still stuck at max 60FPS Using normal -drawRect: with a timer that fires 1/1000sec and calls -setNeedsDisplay: Still not more than 60FPS Same as 2. but I call -display in the timer callback. With that I get the FPS above 60, but it still stops at 100-110 FPS. Although the frame rate should easily be at 10times more. Andy idea how I can really draw as many frames as possible?

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• Label not properly centered in TextButton

  - by Kees de Bruin

  I'm using LibGDX v1.1.0 and I see that the label of a TextButton is not properly centered. I have the following code: m_resumeButton = new TextButton("resume", skin); m_resumeButton.addListener(new ChangeListener() { public void changed(ChangeEvent event, Actor actor) { m_state = GameState.RUNNING; getGame().getWorld().pauseWorld(false); } }); The default TextButtonStyle is defined as: "com.badlogic.gdx.scenes.scene2d.ui.TextButton$TextButtonStyle": { "default": { "up": "menu-button", "down": "menu-button-down", "checked": "menu-button-down", "disabled": "menu-button-disabled", "font": "font24", "fontColor": "white" } } The menu button images are simple 240x48 bitmaps saved as 9-patch images. An image can be found here to illustrate the problem: https://www.dropbox.com/s/cwuhu5xb9ro5w6m/screenshot001.jpg Am I doing something wrong? Or is there a problem with the button images I'm using?

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• Is there anything software-related I can do, to make ubuntu play high-quality mkv files smoothely?

  - by Roy

  I've noticed that beyond let's say..a 20 MB/s bitrate, a movie would lag, played on my laptop.. It results in me missing the highest bitrated scenes of a movie.. And sometimes having to compromise for watching the movie at a lesser quality.. I was wondering if there's anything I can do software-wise to play movies smoothley..? At the moment Ubuntu is installed with all the default settings on an 60GB SSD I use VLC ofcourse.. I also have 2 1TB HDD - maybe I can use them as pagefiles? I don't really know alot about this so maybe this is irrelevant.. I took the laptop battery out since it was dead..but I think this is also irrelevant.. would appriciate a response, even if there's nothing that can be done software-wise :)

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• Ubuntu 13.04 to 13.10 Upgrade Failed

  - by BT643

  I have a VMware virtual machine running Ubuntu 13.04, and yesterday tried to upgrade to 13.10. The install got about half way through and then everything seemed to just freeze completely. I left it going overnight to see if it was just taking a while, but this morning it was still stuck. Nothing would respond at all so I had to just murder it and force a restart with VMware. Now, when I try and boot the virtual machine back up, it just hangs forever at the Ubuntu splash screen. How can I see what's actually going on behind the scenes rather than just seeing the splash screen sit there?

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• How does Google store search trends in backend?

  - by Achshar

  Google trends shows what query has been searched how many times and some other properties of the said query. But how is this data stored in a database? Storing a new row for every search does not seem right. They also tell the query on a time graph, so they must have some way to look for individual searches made by users, but the number of queries they get every day, it does not feel right that they would store every search in a database row along with a time-stamp. This does not apply to just Google trends or Google in general but any other big site that gets awful number of queries and then has tools to see them in depth. I am not an expert on this but I am interested to know some high level structure of how things work behind the scenes.

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• Understanding how to go from a scene to what's actually rendered to screen in OpenGL?

  - by Pris

  I want something that explains step by step how, after setting up a simple scene I can go from that 'world' space, to what's finally rendered on my screen (ie, actually implement something). I need the resource to clearly show how to derive and set up both orthographic and perspective projection matrices... basically I want to thoroughly understand what's going on behind the scenes and not plug in random things without knowing what they do. I've found lots of half explanations, presentation slides, walls of text, etc that aren't really doing much for me. I have a basic understanding of linear algebra/matrix transforms, and a rough idea of what's going on when you go from model space - screen, but not enough to actually implement it in code.

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• Rendering trillions of "atoms" instead of polygons?

  - by Baring

  I just saw a video about what the publishers call the "next major step after the invention of 3D". According to the person speaking in it, they use a huge amount of atoms grouped into clouds instead of polygons, to reach a level of unlimited detail. They tried their best to make the video understandable for persons with no knowledge of any rendering techniques, and therefore or for other purposes left out all details of how their engine works. The level of detail in their video does look quite impressive to me. How is it possible to render scenes using custom atoms instead of polygons on current hardware? (Speed, memory-wise) If this is real, why has nobody else even thought about it so far? I'm, as an OpenGL developer, really baffled by this and would really like to hear what experts have to say. Therefore I also don't want this to look like a cheap advert and will include the link to the video only if requested, in the comments section.

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• Using Response.Redirect with jQuery Thickbox

  - by Chris Stewart

  I'm using jQuery Thickbox to display an iframe (upload.aspx) that allows a user to upload a file. In the code behind for the upload.aspx I finish by sending: Response.Redirect("blah.aspx"); The page I redirect to is dynamic based on the results of the upload process. When this redirect happens, it happens inside the Thickbox and not the parent window as I'd like it to. Here's the calling ASP.NET page (home.aspx): <a href="upload.aspx?placeValuesBeforeTB_=savedValues&TB_iframe=true&height=300&width=500&modal=true" class="thickbox">Add New</a> And here's the submit button inside of the upload.aspx page: <asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click" OnClientClick="self.parent.tb_remove();" /> This is designed to close the modal window and send control to the code behind to perform the file upload, processing, etc. Has anyone experienced this before? How would I go about sending a redirect on the parent window?

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• Does the EntityDataSource support "it.Property.Property" syntax?

  - by Orion Adrian

  I have an EntityDataSource where I'm trying to replace some previous code-behind work. My EntityDataSource looks like: <asp:EntityDataSource runat="server" ID="personDataSource" ContextTypeName="Model.GuidesEntities" EntitySetName="CharacterFavorites" OrderBy="it.Person.FullName" Select="it.Person.Id" Where="it.UserName = @userName" /> When when I actually use it I get the error: 'Person' is not a member of type 'Transient.rowtype[(Id,Edm.Int32(Nullable=True,DefaultValue=))]' in the currently loaded schemas. Does the EntityDataSource not support walking the relationships? How would you do this with the EntityDataSource? Also the @userName parameter is being added in the code behind for now. Extra points for anyone who knows how to specify a username parameter directly in the WhereParameters collection.

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• Why is the unit test useful when the view is not unit testable in MVVM?

  - by BigTiger

  Why is the unit test useful when the view is not unit testable in MVVM? In MVVM, we have the models, view-models, and views. The claimed advantage is that MVVM can make the models and view=models unit testable. But all the three parties belong to the same application. If the views are not unit testable, why test the other two? Will unit testing the other two and leave one not tested improve the quality? Removing all the code-behind from the views sounds weird to me. How about the code-behind only handles the pure UI operations?

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• sorting and paging with gridview asp.net

  - by dangerisgo

  I'm trying to get a gridview to sort and page manually with no success. The problem is that when a user clicks the column they want to sort, it sorts that page, but doesn't sort the datasource (dataview) behind the gridview. So when they progress to a different page, their sort is lost. Pretty much I'm looking for a sort that will actually sort the datasource behind the gridview. Here is what I have so far: protected void GridView_OnSort(object sender, GridViewSortEventArgs e) { String sortExpression = e.SortExpression; if (GridViewSortDirection == SortDirection.Ascending) { DataView myDataView = new DataView(mybll.GetItemsOrdered()); myDataView.Sort = sortExpression + " DESC"; GridView.DataSource = myDataView; GridView.DataBind(); } else { DataView myDataView = new DataView(mybll.GetItemsOrdered()); myDataView.Sort = sortExpression + " ASC"; GridView.DataSource = myDataView; GridView.DataBind(); } } Any help would be appreciated. Thanks.

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• Why other languages don't have automatic garbage collection similar as that of the Java Garbage Coll

  - by anonymous

  What are the reason/s behind other languages not having a Garbage Collector?

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• Is it a Good Practice to Write HTML Using a StringBuilder in my ASP.NET Codebehind?

  - by d3020

  I'm interested to hear from other developers their opinion on an approach that I typically take. I have a web application, asp.net 2.0, c#. What I usually do to write out drop downs, tables, input controls, etc. is in the code behind use StringBuilder and write out something like sb.Append(" I don't find myself using to many .net controls as I typically write out the html in the code behind. When I want to use jQuery or call JavaScript I just put that function call in my sb.Append tag like sb.Append("td...onblur='fnCallJS()'. I've gotten pretty comfortable with this approach. For data access I use EntitySpaces. I'm just kind of curious if this sort of approach is horribly wrong, ok depending on the context, good, time to learn 3.0, etc. I'm interested in learning and was just looking for some input.

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• help in c# and javascript

  - by scatman

  how can i call a javascript function, that is in the aspx page, from the Page_Load method, in the code behind?

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• Referencing code in VB.NET

  - by akramnik

  I'm not at all familiar with VB.NET or ASP. I need to create a simple page which makes a call to a remote web service. I used the wsdl utility which comes with the DotNet SDK to generate a service proxy and write it to a VB file. Unfortunately I have no idea how to reference this code in either my ASPX file or the code behind VB file so I can create an instance of the proxy. Edit: I should have qualified this by noting that I'm not using visual studio. I just coded up a .aspx with a .vb behind it and dropped it into an IIS location. Is there a way to do what you're suggesting outside of VS?

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• Global.asax PostAuthenticateRequest binding

  - by Tux

  How can I use the PostAuthenticateRequest event of Global.asax? I'm following this tutorial and it mentions that to use the PostAuthenticateRequest. When I added the Global.asax event it created two files, the markup and the code-behind file. Here is the content of the code-behind file using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Security; using System.Web.SessionState; namespace authentication { public class Global : System.Web.HttpApplication { protected void Application_Start(object sender, EventArgs e) { } protected void Session_Start(object sender, EventArgs e) { } protected void Application_BeginRequest(object sender, EventArgs e) { } protected void Application_AuthenticateRequest(object sender, EventArgs e) { } protected void Application_Error(object sender, EventArgs e) { } protected void Session_End(object sender, EventArgs e) { } protected void Application_End(object sender, EventArgs e) { } } } Now when I type the protected void Application_OnPostAuthenticateRequest(object sender, EventArgs e) It is successfully called. Now I want to know how is the PostAuthenticateRequest binded to this Application_OnPostAuthenticateRequest method?

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• C#: How to change the region containing MDI children?

  - by Erlend D.

  When creating a MDI parent, the entire "inside" of the form is made the MDI region. If you add a menustrip to the MDI parent, the MDI region is scaled down a bit to make room for the menustrip. But if you add a panel to the top of the MDI parent, the entire inside is still the MDI region. Which means that you can move MDI children up behind the panel, and hide their title line. If you move MDI children behind a menustrip, scrollbars appear, and you can scroll higher up to access the title line. But the scrollbars doesn't appear when you are using a panel instead of a menustrip. Because the MDI region doesn't know about the panel, I suppose. How can I scale the MDI region to start below a given Y value?

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• How to call WCF Service Method Asycroniously from Class file?

  - by stackuser1

  I've added WCF Service reference to my asp.net application and configured that reference to support asncronious calls. From asp.net code behind files, i'm able to call the service methods asyncroniously like the bellow sample code. protected void Button1_Click(object sender, EventArgs e) { PageAsyncTask pat = new PageAsyncTask(BeiginGetDataAsync, EndDataRetrieveAsync, null, null); Page.RegisterAsyncTask(pat); } IAsyncResult BeiginGetDataAsync(object sender, EventArgs e, AsyncCallback async, object extractData) { svc = new Service1Client(); return svc.BeginGetData(656,async, extractData); } void EndDataRetrieveAsync(IAsyncResult ar) { Label1.Text = svc.EndGetData(ar); } and in page directive added Async="true" In this scenario it is working fine. But from UI i'm not supposed to call the service methods directly. I need to call all service methods from a static class and from code behind file i need to invoke the static method. In this scenario what exactlly do i need to do?

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• Scrolling png with text & alpha on top of a static UIImageView

  - by heymon

  I have a view controller that has a view structure as follows: FilesOwner FirstResponder View ImageView (.jpg) ScrollView ImageView (.png) The text in the innermost imageview has white text and clear (alpha) all around. I want to scroll the innermost imageview, and see the background image (the .jpg) behind it. Its not working. Its acting like the scrollview background obscures the underneath .jpg. I say this because if I change the background color of the scrollview, that's what I see i.e. if I set it black, I see black behind my .png, if I set it white, I see white. If I change the alpha of the scrollview that doesn't seem to work either. The one other thing I tried was unchecking drawing: Opaque, but that doesn't get it either.

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• How to add handler in dynamic datatemplate

  - by Phillip Ngan

  I am successfully declaring a data template in a code behind as follows: private static DataTemplate CreateTemplate(string sortMemberPath, HorizontalAlignment horzAlignment) { const string xamlFormat = "<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\" >" + "<StackPanel > " + " <TextBlock Margin=\"2,0\" VerticalAlignment=\"Center\" HorizontalAlignment=\"_HALIGNMENT_\" " + " Text=\"hello there\"> " + " </TextBlock> " + "</StackPanel>" + "</DataTemplate>"; return (DataTemplate) XamlReader.Load(xamlReturned); } But now I want to add a size changed handler by changing the line: + "<StackPanel > " to + "<StackPanel SizeChanged="SizeChangedHandler" > " I have the method "SizeChangedHandler" declared in the code behind. This results in a xaml parse error when the control attempts to load at runtime. I suspect that it can't find the handler "SizeChangedHandler". How can I specify this handler so that the xaml parser is happy.

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• Include a c# file in aspx page

  - by BeraCim

  Hi all: I have an aspx page that has a @Page directive which points to a c# class. e.g. <@ Page Language="C#" EnableSessionState="true" ValidateRequest="False" Inherits="MyClass" %> MyClass extends Page, which is the code behind class for that aspx page. Now I want to add another class to the aspx page. This class does some processing and will redirect the user to another page if certain conditions are met. It will be called before the above directive. I tried adding another @Page directive, but gotten an unknown error (literally). I'm thinking that there can only be one code behind class per aspx page so I got the error when I added another one. Googling such question didnt really help me with the answer. So, how do I add another c# class to the same aspx page? Thanks.

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• Silverlight 4 DataBinding: Binding to ObservableCollection<string> not working anymore

  - by Kurt

  Upgrading from SL3 - SL4. First problem: this throws a parser exception: <StackPanel Name={Binding} /> (same with x:Name) Collection is ObservableCollection<string>. Worked fine in SL3. So it seems that SL4 doen't allow binding to the Name property. Huh? So: changed to <StackPanel Tag={Binding} /> ... since I just need to ID the control in code behind. So here's the bug ('cuz this has got to be a bug!): In this frag, AllAvailableItems is an ObservableCollection<string>: <ItemsControl Name="lbItems" ItemsSource="{Binding AllAvailableItems}" Height="Auto" Width="Auto" BorderBrush="Transparent" BorderThickness="0" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="12,6,0,0"> <ItemsControl.ItemTemplate> <DataTemplate> <Grid> <Grid.RowDefinitions> <RowDefinition /> <RowDefinition /> </Grid.RowDefinitions> <CheckBox Tag="{Binding}" Checked="ItemChecked_Click" Unchecked="ItemUnchecked_Click" Style="{StaticResource CheckBoxStyle}" Grid.Row="0"> <CheckBox.Content> <TextBlock Text="{Binding}" Style="{StaticResource FormLJustStyle}" /> </CheckBox.Content> </CheckBox> <StackPanel Tag="{Binding}" Orientation="Vertical" Grid.Row="1"> <configControls:ucLanguage /> <!-- simple user control --> </StackPanel> </Grid> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> In the code behind, I use a recursive function to find the Dependency object with either the Name or Tag property provided: public static T FindVisualChildByName<T>(DependencyObject parent, string name, DependencyProperty propToUse) where T : DependencyObject { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++) { var child = VisualTreeHelper.GetChild(parent, i); string controlName = child.GetValue(propToUse) as string; if (controlName == name) { return child as T; } else { T result = FindVisualChildByName<T>(child, name, propToUse); if (result != null) return result; } } return null; } OK, get this: in the code behind, I can get the control that is ORDERED FIRST in the XAML! In other words, if I put the CheckBox first, I can retrieve the CheckBox, but no StackPanel. And vice-versa. This all worked fine in SL3. Any help, ideas ... ? Thanks - Kurt

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• Native (non-jqueryui) way to set prompt() input field inline.

  - by Anthony

  I might just be using the wrong keywords on Google, but what I have in mind is: -------------------------------- | What is your mailbox? | | | | [ ]@mail.example.org | | | | [OK] [Cancel] | -------------------------------- The idea being that the input field is followed right behind by the mail server name, to help avoid instances where: If I don't make it follow right behind, the user puts in the whole thing, If I default it to "[email protected]" they delete the server name. In either case, it's not too big a deal, as I will know that if the returned value does have the server, to remove it and if doesn't, I know what server it belongs to, but I think this visual aid will be a better user experience and lower the amount of validation worries I tend to get.

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• ASP.NET EnqityDataSource WhereParameters, creates new property.

  - by Alex

  I am trying to populate GridView, using EntityDataSource(code behind), I need to able to sort GridView. However when I sort i get error: A property with name 'aspnet_Users.UserId1' does not exist in metadata for entity type So I beleive it is because I generate where parameter in code behind: ActiveEnqDataSource.WhereParameters.Add(new SessionParameter("aspnet_Users.UserId", TypeCode.Object, "UserName")); Full code is : ActiveEnqDataSource.ConnectionString = db.Connection.ConnectionString; ActiveEnqDataSource.DefaultContainerName = "Entities"; ActiveEnqDataSource.EntitySetName = "Enquiries"; ActiveEnqDataSource.Include = "UserCars.CarModel.CarMake, Category, aspnet_Users"; ActiveEnqDataSource.EnableUpdate = true; ActiveEnqDataSource.EnableInsert = true; ActiveEnqDataSource.EnableDelete = true; ActiveEnqDataSource.AutoGenerateWhereClause = true; ActiveEnqDataSource.WhereParameters.Add(new SessionParameter("aspnet_Users.UserId", TypeCode.Object, "UserName")); Any suggestions? Thank you very much! The gridview itself renders perfectly, only thing I cannot sort it, any "whereParameters" I add, Add 1 to the property e.g UserId1,EnquiryStatus1, ProdauctName1. etc...

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