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  • How to upgrade a VB6 app with .NET components

    - by Craig Johnston
    I want to make a change to a VB6 app which consists of a .EXE, no VB6 DLLs but a handful of .NET DLLs. The interop is achieved by a one of the .NET dlls being referenced by the VB6 app which seems to require REGASM-ing of an associated .tlb file. If I want to change only the VB6 app .exe, could I just compile it and drop it into the app folder on existing installations or are there going to be binding issues?

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  • How can I use a Shader in XNA to color single pixels?

    - by George Johnston
    I have a standard 800x600 window in my XNA project. My goal is to color each individual pixel based on a rectangle array which holds boolean values. Currently I am using a 1x1 Texture and drawing each sprite in my array. I am very new to XNA and come from a GDI background, so I am doing what I would have done in GDI, but it doesn't scale very well. I have been told in another question to use a Shader, but after much research, I still haven't been able to find out how to accomplish this goal. My application loops through the X and Y coordinates of my rectangular array, does calculations based on each value, and reassigns/moves the array around. At the end, I need to update my "Canvas" with the new values. A smaller sample of my array would look like: 0,0,0,0,0,0,0 0,0,0,0,0,0,0 0,0,0,0,0,0,0 1,1,1,1,1,1,1 1,1,1,1,1,1,1 How can I use a shader to color each pixel?

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  • C++/CLI .ToString() returning error

    - by George Johnston
    I am a beginner to C++/CLI as I come from a C# background. I am currently writing a wrapper for some native C++ code. I have the following methods: void AddToBlockList(System::String^ address) { char* cAddress = (char*)(void*)Marshal::StringToHGlobalAnsi(address); _packetFilter->AddToBlockList(cAddress); } void AddToBlockList(IPAddress^ address) { char* cAddress = (char*)(void*)Marshal::StringToHGlobalAnsi(address.ToString()); _packetFilter->AddToBlockList(cAddress); } ...The first method works fine and converts my string into the character array. However, the second function with the IPAddress object as the signiture gives me the following error: error C2228: left of '.ToString' must have class/struct/union ...When I type ? address.ToString() ...in the command window, the IP Address prints. Not sure where I'm going wrong. Any ideas?

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  • Using target-specific variable in makefile

    - by James Johnston
    I have the following makefile: OUTPUTDIR = build all: v12target v13target v12target: INTDIR = v12 v12target: DoV12.avrcommontargets v13target: INTDIR = v13 v13target: DoV13.avrcommontargets %.avrcommontargets: $(OUTPUTDIR)/%.elf @true $(OUTPUTDIR)/%.elf: $(OUTPUTDIR)/$(INTDIR)/main.o @echo TODO build ELF file from object file: destination $@, source $^ @echo Compiled elf file for $(INTDIR) > $@ $(OUTPUTDIR)/$(INTDIR)/%.o: %.c @echo TODO call GCC to compile C file: destination $@, source $< @echo Compiled object file for $<, revision $(INTDIR) > $@ $(shell rm -rf $(OUTPUTDIR)) $(shell mkdir -p $(OUTPUTDIR)/v12 2> /dev/null) $(shell mkdir -p $(OUTPUTDIR)/v13 2> /dev/null) .SECONDARY: The idea is that there are several different code configurations that need to be compiled from the same source code. The "all" target depends on v12target and v13 target, which set a number of variables for that particular build. It also depends on an "avrcommontargets" pattern, which defines how to actually do the compiling. avrcommontargets then depends on the ELF file, which in turn depends on object files, which are built from the C source code. Each compiled C file results in an object file (*.o). Since each configuration (v12, v13, etc.) results in a different output, the C file needs to be built several times with the output placed in different subdirectories. For example, "build/v12/main.o", "build/v13/main.o", etc. Sample output: TODO call GCC to compile C file: destination build//main.o, source main.c TODO build ELF file from object file: destination build/DoV12.elf, source build//main.o TODO build ELF file from object file: destination build/DoV13.elf, source build//main.o The problem is that the object file isn't going into the correct subdirectory. For example, "build//main.o" instead of "build/v12/main.o". That then prevents the main.o from being correctly rebuilt to generate the v13 version of main.o. I'm guessing the issue is that $(INTDIR) is a target specific variable, and perhaps this can't be used in the pattern targets I defined for %.elf and %.o. The correct output would be: TODO call GCC to compile C file: destination build/v12/main.o, source main.c TODO build ELF file from object file: destination build/DoV12.elf, source build/v12/main.o TODO call GCC to compile C file: destination build/v13/main.o, source main.c TODO build ELF file from object file: destination build/DoV13.elf, source build/v13/main.o What do I need to do to adjust this makefile so that it generates the correct output?

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  • Faster way to iterate through a jaggad 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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  • 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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  • 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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  • Tuple conversion to a string

    - by David542
    I have the following list: [('Steve Buscemi', 'Mr. Pink'), ('Chris Penn', 'Nice Guy Eddie'), ...] I need to convert it to a string in the following format: "(Steve Buscemi, Mr. Pink), (Chris Penn, Nice Guy Eddit), ..." I tried doing str = ', '.join(item for item in items) but run into the following error: TypeError: sequence item 0: expected string, tuple found How would I do the above formatting?

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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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Trying to write a loop that uses an OutputStream to write to a text file.

    - by Steve McLain
    I'm not a java programmer, I'm a VB programmer. I am doing this as part of an assignment, however, I'm not asking for help on something assignment related. I'd like to figure out how to get the OutputStreamWriter to work properly in this instance. I just want to capture the values I'm generating and place them into a text document. The file is generated, but only one entry exists, not the 40 I'm expecting. I could do this in a heartbeat with VB, but java feels very strange to me right now. Your help is appreciated. Thanks, Steve Here's the code: public static void main(String[] args){ long start, end; double result,difference; try {//OutputStream code assistance from http://tutorials.jenkov.com/java-io/outputstreamwriter.html OutputStream outputStream = new FileOutputStream("c:\\Temp\\output1.txt"); Writer out = new OutputStreamWriter(outputStream); for(int n=1; n<=20; n++){ //Calculate the Time for n^2. start = System.nanoTime(); //Add code to call method to calculate n^2 result = mN2(n); end = System.nanoTime(); difference = (end - start); //Output results to a file out.write("N^2 End time: " + end + " Difference: " + difference + "\n"); out.close(); } } catch (IOException e){ } try { OutputStream outputStream = new FileOutputStream("c:\\Temp\\output1.txt"); Writer out = new OutputStreamWriter(outputStream); for(int n=1; n<=20; n++){ //Calculate the Time for 2^n. start = System.nanoTime(); //Add code to call method to calculate 2^n result = m2N(n); end = System.nanoTime(); difference = (end - start); //Output results to a file out.write("N^2 End time: " + end + " Difference: " + difference + "\n"); out.close(); } } catch (IOException e){ } } //Calculate N^2 public static double mN2(double n) { n = n*n; return n; } //Calculate 2N public static double m2N (double n) { n = 2*n; return n; }

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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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