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  • Faster way to iterate through a jagged array?

    - by George Johnston
    I would like to iterate through an array that covers every pixel on my screen. i.e: for (int y = 598; y > 0; y--) { for (int x = 798; x > 0; x--) { if (grains[x][y]) { spriteBatch.Draw(Grain, new Vector2(x,y), Color.White); } } } ...my texture is a 1x1 pixel image that is drawn to the screen when the array value is true. It runs decent -- but there is definitely lag the more screen I cover. Is there a better way to accomplish what I am trying to achieve?

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  • .NET: How does the use of components in .NET differ to pre-.NET?

    - by Craig Johnston
    How does the use of components in .NET differ to pre-.NET? I see the differences as: .NET components don't have to be centrally registered on a machine and can merely be invoked at run-time from a specified location if .NET components are 'registered' in the GAC, problems asociated with different versions of the same DLL ("DLL hell") are avoided because each version will have its own id/key which is known to the calling program Is the above correct, and what other relevant differences are there?

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  • Trap error or 'Resume Next'

    - by Craig Johnston
    I realise this is an older programming environment, but I have to clean up some VB6 code and I am finding that most of it uses: Resume Next What is the general consensus about the use of Resume Next? Surely, if there is an error, you would want the app to stop what it was doing, rollback any data changes, and inform the user of the error, rather than just resuming. When is it good idea to use Resume?

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  • Google analytics event tracking not working.

    - by Cato Johnston
    I have this code setup to track image downloads throught Google Analytics. <a href="/media/37768/CC20100117m001_thumb_2000.jpg" onclick="pageTracker._trackEvent('Image', 'Download', 'file.jpg');" class="hi-res track"> Hi-Res</a> But the events don't ever show up in the GA reports. I thought maybe the the browser was following the link before the javascript was being run but setting href="#" doesn't work either. Any ideas?

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  • How to create own XP printer driver

    - by Craig Johnston
    How would I create my own XP printer driver which will do the following: print to file (probably XPS format) put this file into a password protected ZIP file email the zip file to a configured email address Do existing printer driver already offer something like this anyway?

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  • Copy one jagged array ontop of another.

    - by George Johnston
    How could I accomplish copying one jagged array to another? For instance, I have a 5x7 array of: 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 and a 4x3 array of: 0,1,1,0 1,1,1,1 0,1,1,0 I would like to be able to specify a specific start point such as (1,1) on my all zero array, and copy my second array ontop of it so I would have a result such as: 0, 0, 0, 0, 0, 0, 0 0, 0, 1, 1, 0, 0, 0 0, 1, 1, 1, 1, 0, 0 0, 0, 1, 1, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 What would be the best way to do this?

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  • VB.NET: short cuts in code

    - by Craig Johnston
    Why is the following VB.NET code setting str to Nothing in my VS2005 IDE: If Trim(str = New StreamReader(OpenFile).ReadToEnd) <> "" Then Button2.Enabled = True TextBox1.Text = fname End If OpenFile is a Function that returns a FileStream

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  • keep only GUI when converting vb6 app to c#?

    - by Craig Johnston
    I have a large VB6 app which I want to convert to C#. The majority of the code in VB6 is quite badly written. I thought that a good strategy would be to keep the GUI design since it is adequate and would be a pain to recreate. But I would want to rewrite the code behind the GUI and the data layer. I could keep the GUI design by using one of the VB6 to .NET converters provided by Microsoft. Would this be a good strategy?

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  • How to speed up 'cold start' of .NET component called from VB6 app

    - by Craig Johnston
    I have a VB6 app which brings up a form by invoking a .NET DLL, but the problem is that this form takes almost 5 seconds to appear after a menu item in the VB6 app is selected. How can I speed this up? I'm thinking that one possible solution is to load the Form from the .NET DLL during the splash screen of the VB6 app but make invisible or somehow not show it, and then when the menu item is selected I will make it show or visible. What are my options?

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  • WCF JSON Service returns XML on Fault

    - by Anthony Johnston
    I am running a ServiceHost to test one of my services and all works fine until I throw a FaultException - bang I get XML not JSON my service contract - lovely /// <summary> /// <para>Get category by id</para> /// </summary> [OperationContract(AsyncPattern = true)] [FaultContract(typeof(CategoryNotFound))] [FaultContract(typeof(UnexpectedExceptionDetail))] IAsyncResult BeginCategoryById( CategoryByIdRequest request, AsyncCallback callback, object state); CategoryByIdResponse EndCategoryById(IAsyncResult result); Host Set-up - scrummy yum var host = new ServiceHost(serviceType, new Uri(serviceUrl)); host.AddServiceEndpoint( serviceContract, new WebHttpBinding(), "") .Behaviors.Add( new WebHttpBehavior { DefaultBodyStyle = WebMessageBodyStyle.Bare, DefaultOutgoingResponseFormat = WebMessageFormat.Json, FaultExceptionEnabled = true }); host.Open(); Here's the call - oo belly ache var request = WebRequest.Create(serviceUrl + "/" + serviceName); request.Method = "POST"; request.ContentType = "application/json; charset=utf-8"; request.ContentLength = 0; try { // receive response using (var response = request.GetResponse()) { var responseStream = response.GetResponseStream(); // convert back into referenced object for verification var deserialiser = new DataContractJsonSerializer(typeof (TResponseData)); return (TResponseData) deserialiser.ReadObject(responseStream); } } catch (WebException wex) { var response = wex.Response; using (var responseStream = response.GetResponseStream()) { // convert back into fault //var deserialiser = new DataContractJsonSerializer(typeof(FaultException<CategoryNotFound>)); //var fex = (FaultException<CategoryNotFound>)deserialiser.ReadObject(responseStream); var text = new StreamReader(responseStream).ReadToEnd(); var fex = new Exception(text, wex); Logger.Error(fex); throw fex; } } the text var contains the correct fault, but serialized as Xml What have I done wrong here?

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  • Why would a error get thrown inside my try-catch?

    - by George Johnston
    I'm pushing a copy of our application over to a new dev server (IIS7) and the application is blowing up on a line inside of a try-catch block. It doesn't happen locally, it actually obey's the rules of a try-catch block, go figure. Any idea why this would be happening? Shouldn't it just be failing silently? Is there something environmental I need to enable/disable? Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Line 229: Try Line 230: Here >> : _MemoryStream.Seek(6 * StartOffset, 0) Line 232: _MemoryStream.Read(_Buffer, 0, 6) Line 233: Catch ex As IOException End Try Although it doesn't matter for answering this question, I thought I would mention that it's third party code for the Geo IP lookup.

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  • VB6: Question about version numbers of dependent OCXs

    - by Craig Johnston
    Is it important for a VB6 app to refer to certain OCX versions? I have noticed that if I put my VB6 app code through the IDE on one machine then the form files will refer to different version of some OCXs than if I use another machine. What is the rule of thumb with this? Is it safe to assume that most of these old OCX versions will be compatible with each other and so I shouldn't worry? Some of the OCXs in question are: RICHTX32.OCX v1.1 and v1.2 COMCTL32.OCX v1.2 and v1.3

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  • Providing an application data update from a website

    - by Craig Johnston
    I need to provide an update to application data as a download from a website. The update would actually just be the replacing of some data files with some updated ones. The update, which I assume would be some sort of setup package type program, would need to be able to do the following: access the file system and registry to determine where files should be copied to supply the files to be copied provide strong security so the data files cannot be downloaded or used by the wrong people What would be best way to achieve all of the above?

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  • How to quickly analyse large MDB file

    - by Craig Johnston
    I need to know how to quickly analyse a large MDB file (about 1GB) to see which tables are causing it to be so big. Is there something will easily allow me to show a breakdown of which tables are responsible for how much data. I need to know whether it is just this one customer who is using the application differently, or whether there is genuinely a lot of data in the MDB. This MDB is currently causing the VB app to crash, and I need to know why it is so big so that I can maybe think about how to put some of the data into another 'archival' MDB. Migrating to SQL Server is not an option, unless the use of linked tables from an MDB is a realistic option.

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