what websites, books or courses you guys suggest to use so I learn the fundamentals of programming. What is a class, method, namespace, private vs public. That leads me into .Net programming. A lot of intro to programming use java or C++ as the platform but I want to find one with VB.net or maybe C# if.
View 6 RepliesI'm posting this there is a relationship with my previous post [URL]
I have two projects, namely:
1. Project1 (Windows Application)
2. Project2 (Class Library)
in Project2 there are several classes:
* frmLogin.vb
* frmCustomer.vb
* clsGlobals.vb
in my case, I want to frmLogin.vb and frmCustomer.vb not called in Project1 and I can only call is clsGlobals.vb
I'm relatively new to .NET and am wondering how people handle naming their private variables and the public properties that access them. Like if you want to be able to just read it, but not write to it.
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So far I've taken to putting a 'l' (for local) in front of the all the private variables so as to be able to use the full name for the property. Is there a better way around this, or do you just always have to have different names for private variable/public properties? If so, what sort of conventions do people use?
Its not a huge deal, its just a minor annoyance and I was wondering if I was missing something.
I have these list of RS-232 strings declared in my public class
Public Class TouchInterface
Dim WatchTVbtnCmd As String = "rs232command1"
Dim VolUpbtnCmd As String = "rs232command2"
Dim VolDownbtnCmd As String = "rs232command3"
Dim SystemOffbtnCmd As String = "rs232command4"
Dim RadiobtnCmd As String = "rs232command5"
Dim MusicbtnCmd As String = "rs232command6"
I then have this private sub. For the sake of this thread, what I would like to do is get the name of the label that was clicked which in the code below is already done, convert it to string (not sure if this needs to be done), this is also done in the code below. Next I want to compare the labelnamestring to all the variables in the public class to find out which one it is equal to and then disply that variable which should be my rs232 string in the message box. I have also added "Cmd" to the variable names above so I also need to work out how to add the text "Cmd" to the string to properly compare.
Private Sub Musicbtn_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WatchTvbtn.Click, VolUpbtn.Click, VolDownbtn.Click, SystemOffbtn.Click, Radiobtn.Click, Musicbtn.Click, GardenVolUpbtn.Click, GardenVolDownbtn.Click, GardenRadiobtn.Click, GardenOffbtn.Click, GardenMusicbtn.Click, GardenMediaCenterbtn.Click
Dim labelname As Label = DirectCast(sender, Label)
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I can't make difference between public class and private class and friend and protected friend class.
View 1 RepliesI have a class like this:
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It works, when I make getBar methods public, but I don't want to expose these unneccessarily. Why I can't call private shared methods from a public one in the same class is over my head. I'm using .net framework 4.0 in a web application.
I have written a method to replace multiple characters in a string. Is it possible to overload my own method to the existing method "Replace" in the String namespace?
Function Replace(ByVal inValue As String, ByVal ParamArray replacechars() As String) As String
For i As Integer = 0 To UBound(replacechars) Step 2
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As you can see it have a different signature from the public method so I think it would be nice to have my method overloading the existing method
I can live with it if it isn't possible. See it as a "nice to have"
Is it possible to set a variable in my custom class for Private Read/Write access and Public Readonly access without creating Properties with Get and Set? In other words, from within my class I want full access and from my form I only want read access. Right now I declare my variable as either Private or Public to control Public read/write access. I tried googling my question a bit but I'm not sure what the correct terms even ar
View 5 RepliesCan we override a Public Shared method in derived class? If not why?
View 2 Repliesexplain me the difference between them? I'm new to visual basic, and I need to know the very basic things in Visual Basic allowing me to become a professional User
View 8 RepliesHow to generate public private key VB.net code...
View 1 RepliesI came across a number of new Private Shared variables (of type Hashtables(Of String), initialized in the declaration) added to a partial class for a very large (DataContext-derived) class. This seems sensible to me in one sense because they never change, and making these shared variables ensures that they won't get re-initialized every time a function is called. However, these variables are only used within the scope of one function in the class, and I fear the private namespace of this DataContext-derived class is getting rather polluted, and having these sorts of things exposed at such a high level might be confusing to others reading the code in the future.
Would there be negative performance impact to making these local variables within the function where they are used, or is there some better way to handle this? Basically we are using these 3 hashtables to determine whether anything within particular subsets of properties changed (using GetModifiedMembers and then using the Overlaps function of the hashset to see if any of the modified members correspond to members we care about).
Edit: I caved and took the time to write my own test program, which confirmed that there is a cost to using local variables (which I assume applies generally to all cases -- I doubt there's any case where a shared variable would be slower unless using the shared variable requires some additional logic to do so properly): [Code]
So in this particular case, using the local variable costs about 200%. But in most cases (including my own), the time is probably negligible compared to the overall task. So I guess the question now becomes, how do people generally feel about improving code maintainability at the cost of negligible but known performance impacts?
I'm new to C#.Till this moment I used to make every global variable - public static.All my methods are public static so I can access them from other classes. I read on SO that the less public static methods I have,the better.So I rewrote my applications by putting all the code in one class - the form class.Now all my methods are private and there's no static method.
My question: What should I do,keeping everything in the form class is dump in my opinion. When should I use public,when private and when static private/public? I get the public methods as a 'cons' ,because they can be decompiled,but I doubt that.My public methods can be decompiled too.What is so 'private' in a private method? EDIT: I'm not asking how to prevent my program to be decompiled,I'm asking whether I should use static,private and public.And also : Is there are problem in putting all the code in the form class so I dont have to use public methods?
It is possible convert a private / public rsa key from a .pem file in vb.net ? to xml file.
View 1 Repliesis there a way to have the Get part of a property available as public, but keep the set as private?Otherwise I am thinking I need two properties or a property and a method, just figured this would be cleaner.
View 3 Repliesbasically how do I make my dataset public so I can access it on another form.
Dim ds As New DataSet("Dataset1")
Dim filePath As String
OpenFileDialog1.ShowDialog()
filePath = OpenFileDialog1.FileName
ds.ReadXmlSchema(filePath)
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I just stumbled over this in some C# code...:public Foo Foo { get; private set; }
View 2 RepliesI am a little new to .NET Developing, and have learned a great deal recently, but I'm stuck with something. I come from an ASP Background, I'm trying to subtract 2 variables, but they don't seem to 'see' one another.
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Private Sub ActivateMe(ByVal active As Boolean) Implements IGraphicControl .ActivateMe compiles.How is possible in VB.NET? A private method can be an interface implementation. VB.NET... a lot of compliments to this language and IDE..
View 6 RepliesI have a public variable which seems to be going out of scope. I am confused as it has been dimensioned as a public variable: Public xlCell as As Microsoft.Office.Interop.Excel.Range
I originally had all my code in the same module in the same project and it was wrapped within a For/Next Loop (Example 1). I decided to clean up my code and make it more modular (Example 2). All the code is still in the same module in the same project.
Upon doing so, my public variable is not recognized in any of the private subs that I have created. I keep getting the following error: Message="Object reference not set to an instance of an object." When I test the variable using ?IsNothing(xlCell) in the Main Sub I get False in the main sub. this tells me te variable is recognized. However as soon as the Call SelectCaseSub() is triggered, I get a True value for ?IsNothing(xlCell). Why is this? Shouldn't this variable be in scope regardless?
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I have a situation where I need to make some data available for reading by anyone from a specific device, where the data is pre-loaded on the device, but I cannot allow anyone to create their own device and populate it with their own data in the same format.I know this sounds a little crazy, but there is a good reason!I was planning to use Public Key cryptography, encrypting the data with a public key, but then publishing the private key to anyone who wants to read the data.
View 1 RepliesI can access a module from code behind but not from the aspx page in inline VB code <% ... %>.
View 2 RepliesWhen I use PUBLIC above a Class definition, the compiler gives an error. When I put PUBLIC under the Class definition, I have to qualify the variable with the class name in order to use it in another module.
The documentation says Public can be used at Namespace level. Is there a way to be able to just use the variable name, without any qualifier, across my entire project?
Can i have a property that is Readonly for Public but can Read/Write in Private?
View 4 RepliesImports System
Imports System.Threading
Imports System.ComponentModel[code]....
how to declare "smsport" on class smscomms as public so that it can be access in class form1 or button1_click event.
If you have a class with a PRIVATE constructor.>>
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim example1 As New ExampleClass[code]......
I have a bunch of private variables I've typed out and I want to put all of my corresponding Public ReadOnly Properties in a bunch below them.Is there some way of copying ten lines of
Private _myVar As String
and pasting in ten sets of
Public Readonly Property MyVar As String
Get
Return _myVar[code]....
I'm currently copying the whole bunch of variable declarations, Find+Replacing Private _ into Public ReadOnly Property then going line-by-line expanding the definitions and writing return statements.how to avoid all this nonsense in the future, as I'm developing on a virtual terminal server, and the input lag on my little copy/paste/type operations on the code is driving me up the wall.
give me a good resource that explains the difference between a Private, Public, Shared Functions/Sub/Variables? I normally use Public for Subs/Functions inside of Modules I call from other parts of the program. But I'd like to get more of an understanding of how and when to use them. I want as little as impact to a system that is running my programs as possible, so i guess the key here is I'm trying to just get more proficient in my coding.
View 8 RepliesI'm working in .net environment (all versions) and using vb.net. I want to generate RSA public and private keys based on a passphrase. RSA algorithm only limited by using a class provided by the .net ie System.Security.Cryptography.RSACryptoServiceProvider Class. I know how to generate random RSA public/private keys and perform encryption/decryption.But that .net class don't let us creating RSA public/private keys based on a passphrase.
View 4 RepliesI have been told before that it is possible to create sections of code which can be collapsed and expanded like a normal Public or Private Sub, but containing multiple Public Subs So say I have code for a variety of textboxes I wanted to be able to collapse, how would I do this?
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