I've been working on a really large project for almost 2 years and the client requirements keep changing. These changes, of course, effect everything and I would like to find a way to work with the CSS in a more dynamic fashion.
I assume I could get one of the ruby or python CSS DSLs running under ironRuby/Python but this client is very very particular about what software/frameworks are installed.[url]...
I've just gotten started with development using Visual Studio (though this can be seen as a more language-generic question), and need done design answers regarding how to suitable relate a Database Entity/Table with an Class in-code.
Currently, I create a class who's attributes or iVars directly correspond to the fields in an Entity.
When I come to fetching all 'Customers from a Table' for example, I run a Select all statement against the database and for each result-row returned, I instantiate a new class Object where I use the Class' default constructor to set the instance variables. (I really wish there was a method like PHP's mysql-fetch-object()?)
I can then add each of these objects to say, a List(of Customer) and return it.
This doesn't seem like the best way to do it. If I were to change the Database schema, I'd have to reflect those changes in the class also.
In my applications I use objects and classes, but when reading SO topics, I have the idea I don't use real OOP principles. For example, I never use inheritance or interfaces. Therefore, I am trying to learn proper OOP (in VB.NET), but I find some concepts quite hard to understand (even after reading a lot about the subjects on SO).So I'm trying to find a book or resource with good practical real-world examples. For instance, I kind of understand examples like using an interface for both Dog and Cat classes when using a EatFood method, but I find it hard to relate it to real-world cases.Ideally these books or resources should cover explanations about:
- when and why to use inheritance or interfaces or abstract classes
- when and why to use private, public, protected, virtual etc.
- best practices in dependency injection /inversion of control
- when to use aspect oriented programming
- using of constructors
- solid principles
- singletons
- encapsulation
Perhaps it's a mix of all kinds of concepts, but I think these are all related to OOP, please correct me if I'm wrong.I would prefer a book/resource with VB.NET examples, but this might be difficult?
I'm looking for a library for Autocomplete support in text controls which remembers all previous entries of the user and provide auto-complete support for it.For example for "recent files" I use [URL] and it works great. Do you know something like that for this purpose?
UPDATE : This is a .NET Winforms application and I'm using normal Text Control.
Can you define this :
Class
Object
Inheritance
Polymorphism
Abstraction
And could you make it easy to understand I'm having a hard time to understand those terms.
I have a Visual Basic Class Library project. It generates a DLL. Is there a method to generate a static .LIB to which I can do a static link?Alternatively, can I do a static link against a DLL?
View 6 RepliesI am creating a project in VB.NET in which one of the reports require that the name of employees should be displayed as column names and whatever work they have done for a stated period should appear in rows below that particular column.Now as it is clear, the columns will have to be added at runtime. Am using an ODBC Data source to populate the grid. Also since a loop will have to be done to find out the work done by employees individually, so the number of rows under one column might be less or more than the rows in the next column.Is there a way to create an empty data table and then update its contents based on columns and not add data based on addition of new rows.
View 1 Replies1) is vb6 is interpreter based languge or compiler based or both interpreter and compiler based language?
2) is VB.Net interpreter based languge or compiler based or both interpreter and compiler based language?
3) if any of above mentioned is both interpreter and compiler based so tell me please when it compiles and when it interprets?
In a vb 2010 project, I have 2 win forms: Form1 and Form2.
In the Form1 class there is a server-based timer: when the "elapsed event" fires, then I update the text of a Label1 on the Form2. A very simple code:
what WPF based apps are?Is it an application that runs under Silverlight? If so, how?I know; Windows Forms based apps,console apps,DLL _ Class Library Projectsand I've had an introduction to ASP.Net.What I mostly want to know is, if WPF apps are for Silverlight then do they also run in a server based fashion like anASP.NET website would when you create ASP.Net webpages?Is it a way of creating what looks like a FORMS BASED application but it runs in a browser instead or what?Please enlighten me a bit further as I have no idea what WPF is all about.
Anyone know of a free SMS library or webservice for .NET that will allow me to send text messages to people's cell phones?
View 8 RepliesI have a pdf file. I want to use visual basic code to print the file to another pdf, with my particular pdf settings, which includes
- orint in landscape format and
- print multiple pages on single page. (4) are there any libraries. is it possible?
Can System.Drawing.Printing Namespace do it? Is there any way to set that print multi pages =4 in PrinterSettings I was unable to find ...what all values print settings can take?
If it's 0-based, how can we add a placeholder to make it 1-based?
View 4 Repliesthere's a lot of dlls i've got one in the Release folder and one in the Debug folder under bin, there seem to be one in the obj folder as well.they all seem to work fine, but which should be the correct one?
View 4 RepliesPossible Duplicate:Building F# library to be used in C#
Let's say I have the following function.
let rec fib n =
match n with
[code].....
I am looking for Graph libraries for .net. Are there any out?ps: I mean GRAPH libraries, not graphics nor charting libraries!
View 12 RepliesI have two projects; A and B, where B needs to use some classes that are in project A. Hence, I added B to A's solution, and in B I added a reference to project A.
Is that sensible? Or should I rather put those classes in a class library?
I see that if I further want to open form/program B from a menu option in project A, then A needs a reference to B. Which would not be possible if B already had a reference to A. However if I use the class library for the common classes, then it's ok as B doesn't need the A reference.
Does this sound logical? It would be nice to know what are typical reasons for putting projects in the same solution, and if it's advised to use libraries aggressively to refactor common code between two projects, even if it's just a couple of classes.. Yet I've never made my own library, so a bit unsure on when to use it.
I have a DLL library, but I am not familiar with it. How can I get its usage in vb.net?
View 2 RepliesI was looking at tutorial that was detailing how to Build a Class Library Component and Consumer Client Application. One of the steps involved was how to add a reference to a library. Am I right in assuming that the reason for adding a reference is to show Vb where class library is located. I would also like to know if it is possible to add the reference within the code. In the tutorial the reference was added via the top menu (selecting project and add reference).
View 4 RepliesI am running through an issue for which I am unable to find a solution.My goal is to:1- compile a x64 .NET library (vb) which has a simple User Control 2- Use this dll in a .NET WinForm application targeted to x64 CPU ONLY.
I have been able to do the first step, but now I am unable to add the library into the VisualStudio Toolbox. With our previous x86 version we had just to right click to VS toolbox, click on "Choose items...", then brows to the needed x86 assembly. If we do the same selecting a x64 lib (of course I am running vs on a 64 bit OS), we get the following message "[DLL PATH] is not a Microsoft .NET module."
I have decided that I want to learn a bit about sound and how it works so I thought that I would make an application that reads and plays MP3 files. I know that this will be very difficult and that I will be re-inventing the wheel, but it's all for the educational purpose. So my questions are; How does it work, how does Windows Media Player plays the data from the MP3 file? How can I, with the data provided in the MP3 file, know what to play, how it should sound? Which method would I have to approach to play the sound provided in the file? If you think that I have too little knowledge on the subject
View 4 Repliesi have created a dll library and now i want to secure it....and distribute it to other...i want to provide a trial so that the user can see what it can do....how can i protect it...
View 2 RepliesI have created a library which generates a .DLL file that I include in some of my projects. Now my question is that I have 2 databases, a development and a production one. I want to give the user using the .DLL file to have the ability to select which database they want to query. How can I achieve that?
The way I know how to do it will require them to manually select the database EVERY TIME they call a function..
[Code]...
I'm just wondering if there is something I should know of when doing this or will it work straight out of the bat as long as the .NET framework is installed on the client?
I ask because when I attempted this, VB6's references dialog said "cant register that dll"
Im trying to use the library in GNU in VB2008 to generate random number with uniform distribution (actually will also use it for other distributions)...I already added dll under bin file and try to run the following code, but just cant make it work: Public Class Form1 Declare Function gsl_rng_uniform Lib "C:vbuniformuniforminDebuglibgsl.dll" (ByVal x As Double, ByVal y As Double) As Double
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I'm merging two of my projects that can share a lot of the same classes into one solution with two web applications and a shared class library.
I've literally just dumped all the classes into the class library project and as expected I've got a ton of errors to fix. My main problem at the moment is the connection string. Currently I have this (which is obviously not going to work):
''' <summary>
''' Initialise the data access layer by loading the database connection string from the Web.Config file
[Code].....
I have the following problem. I have some project written in Visual Basic (not Visual Basic .NET but simple Visual Basic - sic!). I can compile it and generate a dll. Then inside my web application I add reference to this dll library. When I run my web application hosted in default Visual Studio server, everything is fine and I can debug my Visual Basic project. However, when I host my web application in IIS then I can't.Code does not stop in my breakpoint. My asp.net catch the exception when I try to execute some method from the mentioned library which is something like:
Unable to cast COM object of type 'xxx' to interface type 'yyy'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{4C2875B5-3265-306B-9C74-1BEC98986B1A}' failed due to the following error: Error loading type library/DLL. (Exception from HRESULT: 0x80029C4A (TYPE_E_CANTLOADLIBRARY)).
I am working on a project that currently uses a .tiff, compares the defined template document to the document in question. We are moving away from the .tiff format for a variety of reasons but mainly because the new files will be coming in the format of PDF. I see two potential solutions to the issue. First convert the PDF to a tiff and use the existing code. Or second, use a PDF library that will compare the template PDF to the PDF that is received. Because the PDF that is received will basically come from an outside source we won't know for sure if it is text based or image based so the library or tool will have to be able to compare both.
View 2 RepliesWhen I downloaded my Visual Studio Express I also downloaded the MSDM Library (Express Edition) to have the extra resource. I just now got around to installing that. I was under the impression that this was extra content stored on your PC. I could not seem to find a way to access it from VS Express 2008 or find an exe to start it by itself. I searched the Internet and all I get is information about accessing the Online version of the MSDN Library. I do see an icon in VB Express that says MSDN Forums. Is this what I should be looking for or is there really local content I can access.. How does this work?
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In my shop we currently develop what I would consider small to medium sized projects.We have been investigating the Enterprise Library and how it may be able to help us in development.I have particularly been looking at the Logging block and comparing it with Log4Net.It seems to me that the Enterprise Library blocks would be an extremely over-engineered solution for something like simple application logging.That being said. Are you using the Enterprise Library and on what size projects? What are your thoughts on the Enterprise Library as a whole?
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