.NET Enumerations Of Symbolic Constants For String Values?
Jun 1, 2009
I have a list of rather meaningless codes that I'm processing with a VB.NET Windows application. For the business logic I'm writing to process those codes, I'd like to use meaningful constants (like ServiceNotCovered or MemberNotEligible) instead of the original codes (like "SNCV" and "MNEL").As far as I can tell, Enums can only map to numeric values, not to strings. So the best I've been able to come up with is a static class that exposes the constants as static readonly string fields that are internally set equal to the code values, as follows.
Public Class MyClass
private _reasonCode as String()
Public Property ReasonCode() As String
[code].....
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Sep 24, 2010
The code underneath works when I use WM_MOUSEMOVE but not when I use WM_NCMOUSEMOVE. Is WM_NCMOUSEMOVE not supported anymore?I use the correct values for the constants too.Protected Overrides Sub WndProc(ByRef m As Message)Dim MousePosition As Point
Select Case m.Msg Case WM_NCMOUSEMOVE MousePosition = New Point(m.LParam.ToInt32())
If MousePosition.Y < 50 Then CloseButtonState = ButtonState.Flat
Else
CloseButtonState = ButtonState.Normal
[Code]...
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May 11, 2010
I need a source for the VALUES of the constants used for dealing with video using SendMessage.
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Sep 21, 2009
I have a class in VB with some constants that represent the string name of my security roles. I need to be able to call a function to return to me a string array(or collection, or whatever) of the values of each of these constants. I will be using it to make sure that my databases Roles table has the same roles as coded into the application.
[Code]...
I'm looking to run a function, i.e. ClassConstantsToStringArray(gettype(Roles)) that will return to me "Administrator","Basic User","Power User" I'm know reflection is the way to go, I just don't know enough about using it yet to get what I want. I found a function on the net that would return to me the constant names in a FieldInfo array but still don't have enough smarts to make that work for me.
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Feb 4, 2011
I noticed that if I leave off the terminating double quote for a string constant in Visual Studio 2010, there is no error or even a warning, i.e.
Dim foo as String = "hi
However, the continuous integration tool we are using flags an error:
error BC30648: String constants must end with a double quote.
Is there some language rule in VB.Net that makes a terminating double quote optional "sometimes"? Is there some setting in Visual Studio that will make it flag this as an error, so I can avoid "breaking the build" in this way?
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May 31, 2012
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
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Apr 11, 2010
I usually always use enummerations as a pass ID of some type with a calculated value using the n^2 notation to calculate the return values. It's easy to derive with squareroots what values are derived from a sum; but most of the time I use the Identifier String to denote a combo box drop down list view. I think this is fairly routine for most developers; since in all my coding or rework I have seen it used commonly by other developers also.
Anyway, I wanted to do some sort of comparisson array of strings to fill the combobox using the *.Items.AddRange() function and it requires an array pass (this typically shrinks the code down considerably) and if you want to mix and match arrays in segments it's easier. So here is the code; for doing so I am assuming that other developers use an "AddToArray" type function like me; if not you have to write the function or just replace the code with the actual adding to array.
''' <summary>
''' Convert an enummeration to an array.
''' </summary>
''' <param name="ConvertTo">Convert to return type.</param>
[CODE]...
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Oct 2, 2010
I'm trying to figure out how to add an enumeration to an object with Linq. For example:
Dim thingBlock = <Things>
<Thing Name="Ish">
<SmallThing>Jibber</SmallThing>
[code].....
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Apr 20, 2010
Using Visual Basic express edition,I would like to make a small application to create and check symbolic links.it shall be like a grafical interface for Commands: 'mklink' and 'fsutil reparsepoint query'I already found ways to creta a symbolic link ( API CreateSymbolicLink )
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Jun 8, 2011
In my project, it is desirable to access built-in color, dash styles, hatch styles by a numerical index rather than their names. For example, I would like to access the colors in a loop from 0 to 140 and display each of these in side by side rectangles in a picture box. Then later, when I click on the rectangle for a desired color, calculate the index of the color from the position of the rectangle in the picture box and use this index to set another object to the clicked color. I understand the coding for all of this except for how to get the colors from the enumeration in the loop and later, after I get the index from the clicked picture box, how to I access the desired color from the enumeration by using the index obtained from clicking the picture box.
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Dec 31, 2010
How can I find if a given file is a symbolic link? And once I know that it is, how can I get the target its pointing to? I'm using VB.NET in Visual Studio 2010.
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Jun 18, 2011
I'm doing some directory work and in this directory, some of the subdirectories are symbolic links to a different location. I need to be able to determine which directly is a symlink and process them differently.
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May 20, 2010
I want to use the function of fsutil, which can create the symbolic link for me. I have try to code in vb.net web application to call the cmd and input the command needed for create symbolic link, exampleit can be created a symbolic link between the two file under a local system network. But if I use the function for network, it cannot works because the IIS is not giving permission for those function. I wish to use it on network, using the Internet InformationMy vb.net code as below:
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim info As New ProcessStartInfo
[code].....
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Sep 20, 2009
my goal was to have a string generator that runs through all possible values of a string eg.
Possible values:
abcd
Chars that need to be filled:
**
Outcome:
aa
ab
ac
[code]....
(I have cut out a section where it tries to write it to a doc file. (just the writting))What I was wondering is how would I improve several parts of this code?
1. The speed - Already In a background worker (I will write a delegate soon )
2. The chars that can be used with it because this only allows the preset ones I would like to be able to use other ones like � or Chinese chars etc.
3. general Code.
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Feb 3, 2012
I am trying to use string.format on a url to pass several values into the string. It's probably a simple error but I cannot get the following code to work. It doesn't even build the string.
Public Sub getStockData()
Dim client As New WebClient()
Dim url As String
[code]....
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Nov 28, 2010
There are a bunch of constants like vbTab in VB.Net, is there corresponding one in C# ?
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Apr 24, 2012
i cant understand what constants are.
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Jun 29, 2010
Say I have some constants that depends one of other, and I decided to keep them together in a container instead of keeping it as individual constants in a class.I thought use a Structure for that scope, but compiler force me to declare a private member for that structure.
[Code]...
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Jan 8, 2009
How would you declare constants from a .dll, so you can use it in your program.
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Jan 4, 2010
i was concerned if constants take up storage. if a class had 10 integer constants at class level, will that adds up to 40bytes of storage or is that actually not true because they are constants?
what i'm trying to do: find the best place to put the constants that i need to access at class scope, and whether its best to make them shared or not. [constants are private]
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Sep 2, 2011
I want to define several constants of pens like SystemPens. How do I do that?
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Sep 24, 2011
Can anyone explain what the following vbkey constants are as actual key presses? I've tried searching and really can't find any info other than vbKeyCancel = CANCEL key. Well, what's a cancel key? I dont have one on my keybaord...I read somewhere that CANCEL = Ctrl+C. Is that true? If so, what are the other few I have listed?
Constant
Value
Description[code].....
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Apr 6, 2011
Every time I do something that ends up using windows API calls in VB, I always end up having to look up the values for the windows constants. Does anyone have a file with a class or something for VB that defines all the WIN-API constants?
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Oct 17, 2011
I have two list boxes that have a list in each and each one has a constant. I am trying to add the selections that are made together and output the total in a third label. I am stuck at this point and am not sure how to proceed, it is entirely possible that i am doing it wrong. Would someone please have a look at this and let me know what the next step would be or if there is a different wayof doing it than I am.[code]...
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Jul 30, 2010
It would be good if visual basic had standard math constants like pi, the Euler number, and others built-in so one doesn't have to define them each time and have the possibility of making typos. Even some of the physical constants in MKS unit could be included like the Boltzmann's Constant, speed of light, permittivity and such. Each could be a special simple like kb for the Boltzmann's constant. Or it could be a properties like phyconst.c for the speed of light, phyconst.kb for the Boltzmann's, phyconst.sb for the steffan-Boltzmann's constant, pmathconst.e for e=2.71.
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Dec 10, 2009
Calculate and display the total cost of the sale, as well as the total cost of all sales and the average cost of all sales. - Clear the box for the number of yards, the total cost, and return the quality, padding, and installation settings back to their defaults. Use constants for the cost of each quality of carpeting ($4.95 for Fabulous Flat, $8.95 for Precious Plush, or $12.95 for Super Sculptured), the padding charge ($1.25 per yard), and the installation charge ($3.50 per yard).
[Code]...
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Feb 23, 2010
I've got a situation where I need a table of constants in my app. It's actually a table of 43 formatting options where the description will appear in a drop down and the detailed settings will be used by the codeIt appears that VB can't do arrays of constants. So I've fiddled around with a Constructor in a class that creates a new array then loads up each element with hard-coded .Add statements. It doesn't seem elegant though.So I then decided to try an XML file, that I load in the Constructor and assign the contents to an array. This is what I've decided is the best, most elegant, option - but I'm throwing this question in to see what you people might recommend ! The data is mostly strings
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Mar 18, 2009
We're trying to trim the number of assemblies we load during startup, and one of the easiest to cut is the Microsoft.VisualBasic assembly. There are alot of things in it that were easy enough to replace, like Left(), but I'm struggling to find a good way to replace vbLf and Chr(). vbCrLf was easy enough to replace with Environment.NewLine, but we have a few spots where we generate content for a Unix-based system that is expecting line feeds only.
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Nov 13, 2009
I am exporting data to an Excel spreadsheet from a VB.Net 2008 application. Now I'm trying to format the spreadsheet. So I am creating macros in Excel that format the spreadsheet, and then using the code it generates in my application. The problem is that the constants used in VBA are not being recognized in VB.Net (They are recognized in VB6). I have the following imports:
Imports Microsoft.Office.Interop
Imports Microsoft.Office.Interop.Excel
Is there something else I should be importing? For example, in this line, xlNone and xlDiagonalDown are flagged as not declared.
oXL.Selection.Borders(xlDiagonalDown).LineStyle = xlNone
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Apr 19, 2012
I'm working with an API that spits out alot of data in name=value format. At first I processed everything by doing simple string comparison:
Sub ProcessData(ByVal name As String, ByVal value As String)
If name = "thisname" Then
DoThis(value)
[code].....
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