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  • C# Design a class with interface?

    - by Haroon
    I am having a bit of trouble understanding how I will design a class. My class will have 3 methods ICollection<Field> GetFields(); //perform validation internally - return back the object T UpdateFields(ICollection<Field> fields); //pass in model object with values on it, set up fields, then pass back all fields ICollection<Field> GetFieldsWithValues(T object); What is the best way to construct/design such a class keeping in mind: 1. The model object I pass in will be one of 3 or 4 tables, however when I call GetFIelds - internally for each object I know what fields will be there i.e. list.add(new Field{name = "id", value = "5"}); list.add(new Field{name = "nameofcompany", value = "super guys"});

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  • SQL Design Question regarding schema and if Name value pair is the best solution

    - by Aur
    I am having a small problem trying to decide on database schema for a current project. I am by no means a DBA. The application parses through a file based on user input and enters that data in the database. The number of fields that can be parsed is between 1 and 42 at the current moment. The current design of the database is entirely flat with there being 42 columns; some have repeated columns such as address1, address2, address3, etc... This says that I should normalize the data. However, data integrity is not needed at this moment and the way the data is shaped I'm looking at several joins. Not a bad thing but the data is still in a 1 to 1 relationship and I still see a lot of empty fields per row. So my concerns are that this does not allow the database or the application to be very extendable. If they want to add more fields to be parsed (which they do) than I'd need to create another table and add another foreign key to the linking table. The third option is I have a table where the fields are defined and a table for each record. So what I was thinking is to make a table that stores the value and then links to those two tables. The problem is I can picture the size of that table growing large depending on the input size. If someone gives me a file with 300,000 records than 300,000 x 40 = 12 million so I have some reservations. However I think if I get to that point than I should be happy it is being used. This option also allows for more custom displaying of information albeit a bit more work but little rework even if you add more fields. So the problem boils down to: 1. Current design is a flat file which makes extending it hard and it is not normalized. 2. Normalize the tables although no real benefits for the moment but requirements change. 3. Normalize it down into the name value pair and hope size doesn't hurt. There are a large number of inserts, updates, and selects against that table. So performance is a worry but I believe the saying is design now, performance testing later? I'm probably just missing something practical so any comments would be appreciated even if it’s a quick sanity check. Thank you for your time.

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  • Protocol/Packet Design Questions

    - by cam
    I'm looking to a design a protocol for a client-server application and need some links to some resources that may help me. The big part is I'm trying to create my own "packet" format so I can minimize the amount of information being sent. I'm looking for some resources to dissect their protocol, but it seems some completely lack packet design, such as SMTP (which just sends strings terminated by CLRF). What are the advantages/disadvantages of using a system like SMTP over a system that uses a custom made packet? Couldn't SMTP use only a couple bytes to cover all commands through bit flags and save bandwidth/space? Just trying to get my head around all this.

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  • Python design mistakes

    - by Andrea
    A while ago, when I was learning Javascript, I studied Javascript: the good parts, and I particularly enjoyed the chapters on the bad and the ugly parts. Of course, I did not agree with everything, as summing up the design defects of a programming language is to a certain extent subjective - although, for instance, I guess everyone would agree that the keyword with was a mistake in Javascript. Nevertheless, I find it useful to read such reviews: even if one does not agree, there is a lot to learn. Is there a blog entry or some book describing design mistakes for Python? For instance I guess some people would count the lack of tail call optimization a mistake; there may be other issues (or non-issues) which are worth learning about.

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  • To Switch To The Design View Of A Windows Form

    - by June
    Hi Friends I create new project in Windows Form Application using Visual Studio in VB.Net. I place some controls on my form. I don't write any code at this time. I close this project. When i open this project again , i found Form1.vb. I double-click that file , but the design view doesn't appear. I also find Form1.Designer.vb. What in this file is code. How can i switch to Design View of Form1 ? I need to write some codes for that form's objects like Button Click Event. June

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  • Design ideas for

    - by ZeroVector
    I need to design and I'm looking in to using WCF to accomplish this. Basically here is how I have it: Server process: Generate list of files to transfer across multiple FTP/SFTP sites in to a queue. Client(s): Talk to server to get files to transfer. Transfer the files acquired. All the data necessary to transfer the files will be present. Once transferred successfully, notify the server to remove it from the queue. Also, make sure no other client is trying to perform the transfer. Are there are any good articles/design patterns to use? I think it sounds like a good candidate for WCF since ideally it would be load balanced against a few machines. Development will be in C#/.NET 3.5.

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  • Netbook performance - 1.33 GHz vs 1.6/1.66 GHz Atom

    - by Imran
    All new 11" netbooks seem to carry 1.33 GHz Atom Z520 CPU instead of 1.6/1.66 GHz Atom N270/N280. The screen resolution of 11" netbooks make them very appealing, but I'm a bit concerned about their performance as they carry a slower CPU than the 1.6GHz Atom, which isn't a great performer in the first place. Is there any significant difference in performance between 1.33 GHz and 1.6/1.66 GHz Atom processors in day to day usage? Are any of those fast enough to decode 720p x264 video? (When paired with typical Intel GMA platform and software decoder like ffdshow/CoreAVC of course, not with Nvidia Ion platform)

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  • Any software transforming broken lines into curves?

    - by user32931
    Hello, do you know of any software that would help me transform a broken line into a curved line? For example, I have an octagon or a heptagon and I want it to be transformed into something resembling a circle. if you know such software, please, let me know. Thank You! Update A: Here is an image from the tutorial given to me by Jamie Keeling (right now it's the first answer below). At least the picture there represents what I want. In that tutorial this process is called "flattening paths". I will try to put that image right here, but if it doesn't get displayed, you can find it by this URL: http://msdn.microsoft.com/en-us/library/ms536364%28v=VS.85%29.aspx The red line in the picture is what I would want to submit, and the blue line is what I would want to get in the end:

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  • Inkscape: how to create inner border?

    - by Anton
    I create figure and set border width to 1px. My image actual size is 100px. But with border this is 102px. How to set inner border instead of o*uther border*? In Protoshop I can select type of border - inner, outer or center. But in Inkscape I not found this option. Please, help me. Thanks!

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  • Program for drawing with pen tablet, like Salman Khan's one.

    - by Halst
    Hi, I do a lot of sketching with my pen-tablet. I use MS Paint in Windows 7, and it is just perfect except for anti-aliasing. I found some videos of Salman Khan, where his sketching is really smooth and anti-aliased. Do you know what program he might use? You can see a bit of its interface here: http://www.khanacademy.org/press/chronicle.html and some more: http:/www.khanacademy.org/ http:/khanexercises.appspot.com/video?v=GW8ZPjGlk24 Else, you can recommend me something else. I hope to find something like MS Paint in Windows 7, but anti-aliased, or whatever. PS. Sorry for awkward links - newbies are allowed only 1 link per post

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  • Should Windows Multipoint Server stations on individual video cards support hardware video acceleration?

    - by villares
    I've set up a test machine with multiple PCI-e nVidia GF440 Video cards and installed Windows Multipoint Server 2011. I use the same kind of hardware set up with a BeTwin multiseat solution to create a class lab for Google SketchUp teaching (highly OpenGL dependent) and it works ok. On the Multipoint Windows test machine the drivers seem to be installed OK but I don´t seem to get any hardware video acceleration. Is this a intrinsic limitation of this solution or am I doing something wrong?

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  • Video Card needs additional mounting support

    - by Sean
    We are creating a fairly decent system with crossfire. The issue we are having is apparently the video cards are physically to heavy to be supported purely by the motherboard and case mounts. Whenever we have the case horizontal everything works fine however when we bring the case upright the computer stops working. Relevant Info: Video Cards (2) - Sapphire 5870 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814102856) MotherBoard - Asus M4A79T Deluxe Case - CoolerMaster 922 HAF To me it looks as if an additional support bracket that could hold up the end of the card would be required (included with the viideo cards!!!) Does anyone have any experience with this.

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  • Acer makes monitor go to power safe mode unless in safe mode

    - by Babyfriend
    I have an acer aspire x3200 Monitor says no input signal (go to power safe mode) I was only able to use computer in safe mode The computer was on (power safe mode) for two weeks. The monitor is ok with another desktop I tried with a different monitor, same message (monitor goes to power safe mode) Why is this happening and if it's my video card probLem will I be able to replace the video card and solve it? It's currently using GeForce 8200 The NVIDIA® GeForce® 8200 motherboard GPU provides DirectX® 10 and HD movies to everyone. System is Windows Vista™ Thanks

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  • 3 monitors + a TV on a single card with Eyefinity?

    - by Paul Accisano
    Greetings all, Right now I have a fairly standard video card with 2 DVI ports, one powering my single monitor and another powering my HDTV (with a DVI-to-HDMI cable), which are in separate rooms. I never need to have my monitor and TV active at the same time. I'm looking into a possible computer upgrade. I'd like to know if the following situation is possible. I want three monitors on my desk powered by a single card, which I hear these new Eyefinity cards are capable of. But, I also want my TV hooked up. At any given time, I would want either my three monitors active or my TV active, never both at once. So it seems to me it might be possible to do this all a single 3-port card with a splitter of some kind. Is this possible? What hardware would I need? Thanks!

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  • How to install windows without graphic's driver?

    - by Mike Redford
    My notebook's(Compaq Presario V5000) graphic card damaged last week and after that it will be restarted when I want to boot. So I tested it via windows live, and it booted from CD without any problem (as you know in win live, the graphic card doesn't recognize, and in setting of graphic card write : unknown ) Now my question : Is there anyway to install windows without any graphic driver please ?for example, Should I delete some installation files ?! PS : I tested Windows XP , VISTA and 7 but, when it goes to GUI installation restarted again :( Thanks for your help

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  • Need to Connect 2 HDMI between Onboard and Add-In GPUs - What's the consequences?

    - by jmalais
    If i plug a second hdmi cable into my onboard video output (my dedicated add-in only has one hdmi port) will it use my video card or the onboard for that display? Also, what is the difference in quality between HDMI and DVI? I do have a DVI to HDMI adapter and cable that I could use alternatively if the above is not in my best interest. This is a gaming related question as I will be gaming off the two displays, hopefully in the highest of quality.

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  • Graph paper like drawing software

    - by Algorist
    Hi, I have a college assignment, where I have to draw diagrams of voronoi, delaunay, minimum spanning tree etc for the college. I want to do that in computer. I searched in google with no luck. Is there any good graph drawing software you are aware of? Thank you Bala

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  • If I can take a screen capture of a graphical anomaly, can it still be a hardware issue?

    - by Jay Carr
    I have a strange graphical anomaly going on my iMac right now (green and magenta boxes are appearing sporadically), I'm slowly trying to work through different possibilities but I thought I'd start with the basics: Can a graphical anomaly that I can screen capture still be a hardware issue? I know, it seems really obvious. If it's hardware, it should show up well after the operating system has had it's say. And since the operating system is (I assume) doing the screen capture, it seems like it shouldn't see the anomaly unless the problem is software in nature. But, as I've researched this problem I see a lot of people taking their computers in to service people for hardware issues and Apple then resolving said issue. To further complicate things, I also have Windows 8 installed via bootcamp, and the issues seems to be showing up there as well. Anyway, it feels like it must be a driver issue, since I assume that's what the two OSes have in common, but...I thought I'd come here for some disambiguation. In my case, yes, I can screen capture the anomaly (at least in OSX I can), so I assume it's somehow a software (or driver) issue. But I wanted to double check because the internet is being ambiguous...

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  • How to backup or export PowerStrip display profiles?

    - by Sk8erPeter
    I would like to save two of my saved PowerStrip display profiles. Earlier I set 720x540 resolution and some other settings (frequency, etc.) to another display device usually used in extended mode, which is now NOT connected: But when I go to "Advanced timing options", I see some different settings. I thought I could copy settings with the copy icon , but this way I would copy the wrong ones, not the predefined ones (with the 720x540 resolution): What is the best method to "export" these settings before formatting the hard drive?

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