I'd like to get a more refined programming style and I was wondering if any of you might give me a hand...(How to declare public variables, constants, functions...in a proper way),is there any useful link or pdf document I could have a look in order to improve my style?
View 5 RepliesHow can I declare public constants that are available solution wide across all projects?
View 8 RepliesWhen and why do you declare variables in the Public Class Form1 section?
View 1 RepliesAt the head of a module, I wish to declare some global variables for use in various subs/functions.
What is the difference between.Dim x as string and Private x as string / Public x as string, and when would I use one over the other?
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've got a program that runs from one Windows form, Form1, with stuff declared all in that class: public variables, public functions, subs, etc. I decided that the form was getting cluttered, so I added one button to bring up a new form, Form2, and I put some of the buttons & check boxes for testing over there, so that Form1 can be more visually clean. Problem: when I go to put the code for the tests into the buttons on Form2, none of the public variables or subs or functions that reside in Form1 are visible in Form2. What statement/s do I need to add (and where) so that the public "stuff" that's declared in the class for Form1 is visible within Form2, please?
View 6 RepliesI am new to Visual Studio and Visual Basic, but I am a revived dBase, FoxPro, Visual FoxPro, ColdFusion programmer..I'm as good once as I ever was.So I am looking for how to implement some constants for the three main reasons anyone would want to use global constants:Readability, Maintenance,Memory Usage.For example in a list of error return codes, I may assign "File Not Found" an error code of 1010.To create a constant that exists only within a procedure, declare it within that procedure.To create a constant available to all procedures within a class, but not to any code outside that module, declare it in the declarations section of the class.To create a constant that is available to all members of an assembly, but not to outside clients of the assembly, declare it using the..Friend keyword in the declarations section of the class.To create a constant available throughout the application, declare it using the Public keyword in the declarations section [of] the class. global it is visible to all procedures and modules that comprise the application. Global variables and constants, as with Module level variables, must be declared outside of any procedures in the Declarations section and must use the Public keyword.The language above stating "Global variables and constants, as with Module level variables..." insinuates to me that Global Constants and Module Level constants are different, thus having different scopes.
And I have yet to see ANYWHERE that tells me to put stuff in the Declarations Section of a class or program or application, tell me just WHERE the declarations section actually IS! They always give the code of how to declare (I can do this...) but they don't say where the code GOES.I know I am overlooking the simplest of things, but just trying to be very sure of what I am doing.[code]
I am calling this function when a button is CLICKED and received the error; The name "The" is not permitted in this context. Valid expression are constants, constants expression, and (in some contexts) variables. Column names are not permitted. Unclosed quotation mark after the character string 'True)'.
The function is as follows;
Private Sub Save()
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
Dim cmd As New SqlCommand
Imports 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.
How do declare a public variable .aspx web page that can be used in all the pages within my web application?
View 3 Replieshow to use VB to access our SQL server - we've got an app that was coded in Access 2000, using DAO, which in Access 2010 (if I understand right)is DOA, and we should use ADO. So I worked up MSDN's example (http:[url].. In Visual Studio 2008, Visual Basic. I have added in a Reference for MS ADO 2.8 Library to my project. I can see in the Object Browser the ADODB Namespace, and I can look in there to see the ObjectStateEnum, and there is the adStateOpen enumeration. Wonderful. But in my code, I must put it this way:
"If m_oRecordset.State = ADODB.ObjectStateEnum.adStateOpen Then"
and not this way:
"If m_oRecordset.State = adStateOpen Then"
I must be missing some glaringly obvious thing, but none of the items that are declared as Public Constants in the object library are "visible" to my program. Why?
Is their a reason why I cant declare a Public Const this way?
HTML
Public Const whatever as string = my.application.settings.xxx.tostring
I don't understand why not.
how to connect VB2010 to MS Access and how to declare the connection as public? I just switched from VB2010 from VB6.0 and found some major changes since VB6.0 in terms of interface and functionality. Must I use a global module for it just like in VB6.0 (.bas module)?
View 1 RepliesLater on i have a form where a cost for a class is calculated by timing the duration of a class by the costperhour textbox which is in a different form.
View 3 RepliesI'm trying to declare a array that I want to use in the module and in the forms. I like it to be usable all over but I cant get it to work.[code]...
View 3 RepliesJust working on getting more fluent in Visual Basic over the summer so I'm still sharp for my next visual basic class. My teacher went over variables, but only in local scope.I have looked everywhere, but I can't find exactly what I need. I'm making an alarm clock of sorts, and I have this code to populate the minute array and the hour array.
Public Class Form1
Public Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
trying to figure out how to declare items here. here is the
[Code]...
I was thinking about writing some VB 2005 code that would be able to open an excel file and keep it open while I do things in separate functions/subs basically just check boxes, so each check box is its own sub but HOW do I do that with out opening and closing the excel file for every check box sub, since every time I make a check box the sub comes up as private?
View 9 RepliesI have an asp.net web app. It has a shared class, and I want to have the connection string the same through out the site. My string is in my web config, but I don't want to type this all over the place:
View 3 RepliesIs it at all possible to declare variables dynamically? Something like Dim Answers & i As ArrayList. What I'm trying to achieve is putting one or more answers to a question into an array. Or should I really be looking at a mult-dimensional array to store the question number and answer? How would I add to and access a multi-dimentional array? Anyway, here's the section of code:[code].......
View 4 RepliesI'm new to VB.NET programming.What I'm confused about is the different ways one can declare a variable.Would someone please explain the difference between the two declarations below? [code]
View 2 RepliesHow I can declare global variables in vb.net that I can access them in all windows of my application?
View 5 RepliesI am needing help in understanding how to declare variables properly. I am needing to write as program that calculates the commission for a sales person. I keep getting a error listed below. I thought I declared the salestextbox, costtextbox as integers correctly to use them in the calculation. I Copied my code below also. I have reread the chapter again and I am still lose.[code]
View 3 RepliesI would like an overview of System.EventArgs. I have an understanding of System.Object where I can pass data between subroutines and functions using Public Classes. I am curious what EventArgs do?
View 3 RepliesWhat happens if I do: Dim x As New Int32? Is a object of int placed on the heap? If it is, maybe your application would be able to access global variables faster if they were reference types.
A global variable as an value type should be somewhere at the bottom of the stack most of the time and it might take more time to get to this then to get a object from the heap. Unless it's the same story with the pointer of this object is also at the bottom of the stack of course.
I am making a game that involves moving picture boxes automaticly i can get the boxes moving but I need them to be object orientated but when I try to make it a class i am not to sure how to declare the veriables to make it work. [code]
View 3 RepliesThis is a VB.Net newbie question. I'm confused at the different ways to declare and define variables.Here's an example:
Dim URL As String = http://www.c-sharpcorner.com/default.asp
Dim request As HttpWebRequest = WebRequest.Create(URL)
Dim response As HttpWebResponse = request.GetResponse()
[code]......
[code]...
EDIT: The above class is just an example of what could be returned from a web service. I won't have access to modify it at all, sorry if I didn't make that clear.Is it possible to somehow make a clone this class, so that it retains all of the properties values, but hides the fact that there is a Public function?I'd like to be able to take some existing classes we retrieve from a web service(which we didn't write) and be able to pass them on for use in an application, but without exposing the functions. I don't want to go down the route of creating my own classes that specifically define each property and write the values in (due to the sheer size of some of them), so I'm looking to see if there is anything dynamic I can utilise (maybe there is a way using reflection?).
I put "isolated context" in quotes because I don't know what else you would call it. Basically, in C#, you can do this:
{ int i = 0; }
{ int i = 1; }
The curly braces create an isolated context which allows you to declare two variables with the same name in the same method or property logic. Is this possible in VB.NET? Also, what do you call this aside from an isolated context?
Namespace MyClassLib
Public Class MainClass
Public Sub New()
[CODE]...
Is it possible to make it so that the user using the Class Library has to declare a new Instance of MainClass() before using Subs/Functions in Class2 or Class3?