VS 2010 Proper Variable Declaration Conventions?
Jan 4, 2011
I've been programming for many years in many languages and I've seen the variable declarations conventions change. With VS 2010 I've noticed you don't have to declare the variable type. I work alone so I can use any method I want. But, someday I may want to sell some of my code so I would like to keep my programming conventions current.
In VS 2010 which of these would be considered the best convention?
Dim srtFirstName = "Bob"
Dim strFirstName As String = "Bob"
Dim FirstName = "Bob"
Dim FirstName As String = "Bob"
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Aug 24, 2009
I am looking for a good resource on variable naming conventions to illustrate variable type and where variables are declared. So I will have public variables, Private variables, private or local variables. I also may want to declare variables with the same name in different class code (i.e. in the code behind different forms). I am assuming good coding would dicatate a prefix for declaration location.
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Oct 21, 2010
In the example below, what would you name the parameter given that it is used to initialize the property FromDate?For class constructor methods, I like to have the name of the constructor parameter variable match the name of the property which is being initialized. For example, the parameter "fromDate" is used to initialize the module level variable "_FromDate" with the statement _FromDate = fromDate. Likewise, I could have alternatively written Me.FromDate = fromDate.
Proponents of C#'s case sensitivity would probably say that using a leading lower cased letter for the param variable name, which I believe is MS convention, is an acceptable approach to distinguish it from the Property of the same name but different casing.
However, VB is not case sensitive, which I generally appreciate. In the following example, I am using a param name that matches the property name, 'fromDate," and VB refers to the local instance when there is ambiguity. However, many would probably argue that this "ambiguity" introduces the opportunity for the developer to get confused and not realize which variable is being used. For example, my intent below was to have TWO params passed in, "fromDate" and "toDate" but I accidentily ommited one and as a result, the VB.NET did not warn me of the mistake because it assumed that the statement _ToDate = ToDate was equivalent to _ToDate = Me.ToDate instead of informing me that the variable on the right side of the assignment statement was undeclared.
Public Class Period
Property FromDate As Date
Property ToDate As Date
[code]....
In my judgement, we should have a convention for prefixing all parameter variable with a prefix, but hasn't the use of prefixes been discouraged by Microsoft? For example:
Public Sub New(ByVal paramFromDate As Date, paramToDate As Date)
..or maybe it could be shortened to pFromDate, pToDate...
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Mar 8, 2010
In this
Dim [end] As Point = e.Location
what is the significance of the [] 's?
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Jan 19, 2011
I have the following form[code]...
and when I run my app, I get a SQL error that tells me that I need to declare a value for '@payperiodstartdate' but I know that that value is declared because the first query runs fine. I am told that the line where the error is is line 59, which is this line [code]...
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May 17, 2010
I'm working on a home project using DirectShow.Net. to learn some VB.net. Most of the examples I've found have all been in C# so I'm looking through code for ideas and converting where I need to. I keep stumbling upon these declarations and I'm unsure how to convert it to a VB.Net statement.[code]Then the second part seems to be assigning the value but as its made up of two parts im unsure how that works?
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Feb 1, 2010
[code].....
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Jan 27, 2012
wondering about the relatively efficiency of declaring oop variables in the loops, emselves, or declaring them before first use. Here are some examples:Declare early:
Dim ix As Integer
Dim currentNode As System.Xml.XmlNode
For ix = 1 To 100
[code].....
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Oct 24, 2011
I have noticed in VB.Net that most Dim statements also include an assignment. Eg:Dim myvar As String = "Hello World"As this wasn't possible in VB6 I have always done the following:
Dim myvar As String
myvar = "Hello World"
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Aug 26, 2011
For i As Integer = 1 To 10
Dim j As Integer = 10
Next
now my question is, Is memory allocated to j every time its executed inside for loop? or only value of 10 is assigned on subsequent iterations?
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Feb 20, 2012
im sure im mis-wording the concept but here it is anyways. I know in CSharp you can do
el.AppendChild(new UISize(file, "TSize") { CX = 95, CY = 20 });
which declares a temporary bucket variable and then assigns the associate property values to the variable. Which then sends it to the XMLElement AppendChild method. What is this design concept called? What is the conversion to VB.Net? I have tried using my own online utility that does a 90-95% conversion rate from C# <-> VB.Net. It has failed in this instance, and so need a hand-up on what i am looking to do to convert this from C# to VB.Net. I would really like to not have to do a long-declaration of a variable with assignments, if at all possible.
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Apr 26, 2010
I'm making a call to my DLL file (prototyping 30+ functions), and want to be able to switch between different versions of the DLL quickly while in development. Thus, i want to replace the literal string constant that follows the "Lib" key word, with a variable string constant. In case there's any confusion in my use of the jargon. I am currently able to do this:
[Code]...
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Nov 22, 2010
How could I create declaration(event) to a variable control in VB .net ? [code]please i need to know how to insert this (declaration) newweb_ DocumentCompleted it's similar to WebBrowser_DocumentCompleted but it's a variable
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May 31, 2011
When I scroll down to the function shown below, and right click Analogues - go to definition it takes me to the top of the file, and lands on top of the
[Code]...
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Jul 8, 2010
I was looking at some existing code and stumbled across a variable declaration I didn't understand.
public foo as Boolean?
What does the question mark signify?
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Apr 21, 2010
Why are static variables set equal to 0 in the declaration when 0 would be the default value of the numeric variable anyway when it's first declared? Not including the "=0" in the static declaration seems to work with no problem.
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Jun 21, 2011
I got problem regarding declaration of dynamic runtime array declaration Here is my code
[Code]...
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Dec 16, 2009
What is the appropriate declaration such as "ValueChanged" or "Click" for a NumericUpDown that will execute the code when I press enter. I already know that setting the "AcceptButton" property of the main form to a default button will not work, especially if I want a different button to be selected depending on which control I give focus.
PS: Is the syntax any different from Visual Basic 2010 Express than it is on Visual Studio 2012 RC (running in Visual Basic Mode)?
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Oct 15, 2011
i'm used to be a VB6 user and started move on to VB.NET few days ago and i'm still quite new to its new syntax.Today i came across there is a object declaration with the 'Nothing' keyword follows at the end and what it actually means? Dim l_Active As AvsIdentityType = Nothing
As i know Nothing keyword is usually used to release the instance to the object after we used it but why it is used in the declaration statement?BTW, the 'AvsIdentityType' is a public structure.
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Feb 19, 2011
I want a proper hh:mm:ss formatted duration, but I cant seem to get it right. I have ran through a good dozen attempts and things just arent working.
timer
Public dtStartTime As DateTime
Public tsElapseTime As TimeSpan
Public Sub tmrStartTime()
[code]....
Calling tmrStartTime sets the start of the timer, and tmrGetTimeSpan should report back the proper hh:mm:ss. For example, 11 elapsed seconds should look like 00:00:11, or 65 elapsed seconds should look like 00:01:05.
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May 15, 2012
I have an application developed in VB.NET 3.5 2010 with MySQL as Database server.I need to generate a report type on on a form datagrid View.In the table i have fields as below
Reviewed_By - varchar
Stage - varchar
Review_Status - varchar
[code]....
I Need to retrieve the data to a dataset in below format Reviewed_By are repeated in the table, so i need only 1 cell to be filled by the data and the other empty.I used the below SQL code which worked well at MySQL prompt
SET @PrvSupervisor='';
SELECT IF(@PrvSupervisor=Reviewed_By,'',@PrvSupervisor:=Reviewed_By) Reviewed_By,Stage,sum(Review_Status='Int_Approved') as Approved,sum(Review_Status='Retake') as Retake,COUNT(*) AS TotCount,GROUP_CONCAT(Shot_Num) as ShotsList FROM ShotTable WHERE DATE_FORMAT(Review_Date_Time,'%d/%m/%y') LIKE '10/05/12' AND (Review_Status='Retake' OR
[code]....
In the above result as the last 4 rows are from Person2, so only 1st record of that person is having data remaining 3 are empty.but when i used it from VB.NET i am getting below error.
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':=Reviewed_By) Reviewed_By,Stage,sum(Review_Status='Int_Approved') as Approved,s' at line 1
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Oct 26, 2011
VS 2010 [RESOLVED] Proper location for Global Constant?
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May 19, 2011
In the following two code snippets, the code does the same thing, when I tested this.
Dim test As New Class1 Dim test As New Class1() Do the parantheses make a difference in some way? Is there an explanation of this in the msdn library?
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Apr 24, 2012
It seems up until now I've never used Regex, nor even heard of it. But once I did I realized how extremely useful this is. Having said, it's been 2 days since I've began looking into constructing my own patterns. My most recent being for decimals. Is the pattern I provided below "proper"? and are there also any improvements I could be making for a more efficient patter, which would minimize any possibility of a loophole? [code] So for my use, this is doing what it's supposed to being doing under every test I can through at it. But do mind the 0. and .0, I have a function to normalize these as they are proper, I just pad the left and right accordingly. I found most regex questions asked here..and yes I am doing this in vb.net so it fits. If not, then feel free to move this post somewhere else better suited for the topic of discussion.
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May 3, 2009
According to conventional programming, how is it to properly comment using the '''<summary> feature built into Visual Basic?Would I have to use the part that says
''' <param name="text">Description here
''' characters in</param>
''' <returns>The description</returns>
''' <remarks></remarks>
Here is the full commenting process; is it necessary to use all of it?
''' <summary>
''' Text here
''' </summary>
[code].....
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Mar 25, 2011
What everyone uses for naming conventions?
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Jan 27, 2012
Is there a product/project that would allow you to define conventions for say an MVC Project to statically check for naming conventions like Controller being appended on the end of classes that inherit from controller and/or enforce a certain method signature when decorating a method with an attribute.I am basically looking for a way to kind of set up some guard rails for new developers coming onto our team where we have a clear set of conventions some of which are used to wire things up dynamically through reflection. Seeing that this reflection wire-up would fail because of an incompatible signature would be a huge boon to our ramp up process.Static/Compile time checking for broken rules Ability to target methods decorated with specific attributes (via RegEx or a Wizard)Different Sets of rules based on different types of projects.(example: A set of conventions for an MVC App, a different set for a Web Forms App, and a different set for a Class Library suffixed with .BLL)?
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Jun 9, 2010
I am generally not one to engage in subjective arguments over matters like variable naming, code formatting, etc. So I have no intention of starting an argument here.I just came across this (old) blog post which recommends not prefixing member variable names:
[Code]...
I get it: member variables can be lower camelCase, and public properties/methods can be PascalCase. But VB.NET is case-insensitive, so you can't really give a private member the same name as a public property except with a lower case first letter.I've generally prefixed member variables with an underscore, but I've been told that's not idiomatic.
So really I'm just curious: how do you name your member variables in VB.NET? And is there a "standard" way?
I'm not asking because I believe there's a "right" way or because I particularly want to change my style, and certainly not because I have any desire to tell others they're "wrong." Like I said, I'm just curious.
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Mar 25, 2011
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.
[Code]...
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.
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Jan 5, 2011
iv got visual basic 6.0 and im trying to change the naming conventions because i need to change them to 2008 standards the code is for a basic book shop.im looking ofr the code for the calcualte button on a till.you enter the title,quantity and price.then it updates for extended price 15% discount and the discounted price. There is also a running total of no of books sold and the total no of dicount given in € the code is
[Code]...
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