Obtain A List Of Constants In A Class And Their Values?

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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Use The Correct Values For The Constants?

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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Find Values For The WM_CAP_ Set Of Constants?

May 11, 2010

I need a source for the VALUES of the constants used for dealing with video using SendMessage.

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Create A Class That Has A List Of Possible Values That Can Be Used?

Oct 9, 2009

I want to create a class that has a list of possible values that can be used.Example: when you create one like this: Dim a As ClassName = , a list will pop up in intellisense.or when the class is used as a property on a usercontrol, you can click the combobox and pick from the values.Here is what the value list looks like for the Color class: vs value selection.PNG

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Access Constants In List Box?

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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.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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How To Pass Values From List Inside Of Class

May 5, 2011

I am having a hard time trying to pass the values from a list inside of a class. I am trying to display multiple lines of values from a list inside of a class. My "client" class stores multiple lines of values into a list(of class transaction), with the number value (num) counting each transaction that it adds to the list.

Ex:
Public Class Client
Private m_tranlist As New List(Of transaction)
If CInt(tid) = m_ID Then 'create client tran, add to list
nextTran = New transaction(m_ID, tcode, tdate, ttype, tshares, tprice, value, num)
m_tranlist.Add(nextTran)
num += 1
End If

Now I am trying to display each line that is stored in the list in a label, and I am having major trouble. How do I call the list in my main form in order to display all of the values?

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Access Private Constants In Class Attributes?

Sep 27, 2011

I have an API that I created and currently utilize successfully in C#. I am trying to create an example of interacting with the API in VB.NET (so that the QA without C# experience can still utilize it for creating automated tests).

In C# I do the following

[TestingForm(FormName= "Land Lines", CaseType= _caseType
, Application= ApplicationNameCodes.WinRDECode, HasActions= true)]
public class LandLines : RDEMainForm

[Code]....

This gives me a compile time error because it claims that FORM_NAME and CASE_TYPE is not defined, even though the class has it defined inside.

How can I use the defined constants inside the class in the class attributes?

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VS 2010 : Override Constants In Base Class?

Mar 31, 2011

I have a base class, with a const giving its name. If I inherit that class, how can I override the const to give the name of the new class?E.g. (and I know this won't compile!)

Public MustInherit Class BaseClass
Const ClassName="BaseClass"
Public Sub DisplayName
MsgBox(ClassName)

[code]....

What I want is for class One to display its own name, not that of the base class.

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Getting Field Values From A List Into Fields In A Structure Or Class?

Mar 21, 2012

I have a class (using a class rather than a structure only because I can set a default field value for the fields I declare in the class) and I'm using a web service that returns information (demographic information) in JSON. I am using LINQ to get the values of each "entry" from the returned list and in that, I have to parse through and pull out the actual data that I want.Here's how I have it doing right now (just a start, there are 44 of them total, thus my question which will follow the code):

Dim returnedStats = From ljo As Linq.JObject In returnedObject.SelectToken("results")
'
'
For Each stat As Linq.JObject In returnedStats

[code]....

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Iterating Through A Dataset And Obtain Values Of Each Column In A Row

Apr 1, 2009

I would like to iterate through a dataset and obtain values of each column in a row

[Code]...

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Interface And Graphics :: How To Obtain Rgb Values For Each Pixel And Converting Them To HSL Value

Nov 1, 2009

I am developing a software that would scan the image in a picturebox and obtain the rgb values of each pixel in the image and convert each rgb values to HSL values. I am using vb 2008 express edition. I am still a student. All I have done is to obtain the image in a file and paste it in the picturebox. Below is my code. I dont really know how to start with the process of obtaining the rgb values of each pixel and converting them to HSL values and averaging the HSL value.[code..]

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VS 2008 - Obtain A List Of Desktop Icons And Add Them To A ListView?

Apr 14, 2010

I need to obtain a list of desktop icons and add them to a ListView. I'm currently doing this:


[code]...

It points to the direct path the icons should be located under the user profile. However, for some reason I've yet to determine, not all of the icons are in this directory.

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Sql Server - Obtain A List Of Collections Which Contain Objects Which Implement An Interface In C#

Aug 28, 2010

I am new to .Net Programming and would like to know if Reflection is suitable for traversing an Object to discover Collections within an instance of a class. I am working with the Microsoft.SqlServer.Management.Smo Namespace.

The plan is to connect to a database, determine what collections exists, then for each of those collections, if the Collection exposes objects which implement the IScriptable Interface, generate a script for the object.How do i do the following (This is pseudo-code as I am seeking assistance with using reflection or some other method to do the following)

[Code]...

I would like to enumerate all objects in db with one function if possible

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The Name "The" Is Not Permitted In This Context. Valid Expression Are Constants, Constants Expression, And (in Some Contexts) Variables

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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Obtain Index From Array Where An Input Value Lies Within A Range Of Values In The Array?

Dec 12, 2010

Per this UserControl that can be added to a blank form, I would like to use the HorizUnits array below to map custom grid x coordinate from a mouse x position.For a given input value 13, what syntax would I use to obtain a value of 2 where 13 lies between Value 10 and 16 for which 2 (Name) would be the custom grid's displayed coordinate position?

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.net - Overrides A "list Of Base Class" Property And Returning A "list Of Child Class"

Oct 19, 2010

I have a base class (ex: Class1) containing a list of another base class (ex: ClassA). Each child class of first base class (ex: Class1AA, Class1AB,..) containing a list of child class of second base class (ex: ClassAA, ClassAB,...)The client must never know which child class is using, then i don't think i can use generic for my bases classes.I try something like this and many more, but i always received errors..Imports System.Collections.Generic

[code]...

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VS 2010 : Create A New Class And Have Each List Item Of That Class Such As 'btnID', 'btnText'?

Apr 27, 2011

I want to read a number of items from a file and then associate each of those items with a new button at run-time, so that when the user clicks one of the buttons I can display some information about that item.Can I use a LIST to manage these buttons and items? Can I create a new class and have each list item of that class, such as 'btnID', 'btnText', etc... ?

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VS 2008 Adding Class Object To List Or Array In A Different Class

Jun 21, 2010

I am trying to create an list or an array of a class.Here is my "Ingredient" class that I am trying to create a list of:[code]In my "recipe" class, I am want to create a list (or array) and I am drawing a big blank on how to do it. Can anyone point me in the right direction?

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Get Type Of Derived Generic List Class From List Item Method?

Mar 23, 2011

Public Class notifierMain
Public Class Contacts
Inherits List(Of row)
Public Sub New()

[code]....

When I debug this winforms application I get curType = "notifier.notifierMain+Contacts+row" I want to the Validate function to know it is in MyContacts. How do I do this?

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Make A Project Where A Teacher Views A List Box With A List Of Students Of A Class?

Nov 5, 2011

I wish to make a project where a teacher views a list box with a list of students of a class. When he selects a name from the first list box the second listbox would change its data to show the grades for that one student.

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VS 2010 List(of Class) - System.NullReferenceException Error When Add The Info To The List

Jan 27, 2011

I'm getting System.NullReferenceException error when I try to add the employee info to the Employees list.

[Code]...

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How To Use The Values From A Child Class In Parent Class

Mar 31, 2012

I have a problem that is frustrating me to no end, I have a overrideable function in a parent class, and the override function in the child class, like below:

[Code]...

When i debug, the value is produced, but it doesn't carry over to the parent class of ski.RetailPrice()what seems to be the problem here?

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Convert A List Linq Expression To Defined List Class?

May 26, 2012

y have this class

Private Class MyClass
Public Property propertyOne() as String
Public Property propertyTwo() as String

[code].....

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Make Values Of Checked List Box Contain 2 Values?

Sep 13, 2011

[url]...base on the thread ive linked.

i am able to pass the checked value of the checked list box to a list box

my current problem is

i am going to save the values [ for instance mat_name ] on the listbox in the database

but i need the id [ for instance mat_id ] of that value

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Adding A List (of Class) Or Collection As Another Class's Property

Apr 2, 2010

I'm looking for a tutorial on how to Adding a list(of Class) or Collection as another Class's Property.What I am after is something like the Columns Collection for the DatagridView control.I would like to add Items in the graphics screen. Where the item list is displayed in the left panel and the selected Item properties are displayed in the right panel.

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Using The List Class - Displaying Information From A List Into A Listbox

Mar 6, 2012

I am trying to understand classes in VB 2010. I am a bit confused with displaying information from a list into a listbox.When I run the following code, the word collection appears in my list box. How do I drill down into 'hostnames' to display the info I want.

Public Class computer
Private _HostName As String

Public Property HostName As String

[CODE]...

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Array In One Class Writing To A List In Another Class?

Jun 3, 2011

I'm designing a small GUI Windows program that allow staff at a cinema to reserve seats for customers. There will be a total of 60 seats in the cinema. I have two classes in my program:-

1.) MainForm.vb - used for I/O actions and user interaction
2.) SeatManager.vb - used to hold and handle the background methods and functions that make the program work Here is the code for my MainForm.vb class thusfar:-

[Code]...

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Passing List / Collection From Class To Class

Apr 28, 2009

I seem to have problem with passing a collection/sorted list/ list of strings from one class to another.I am using property procedure to pass it, however nothing is sent to another class. There isn't any error messages either.[code]

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"upgrade" An Object To An Inherited Class, And Keep All The Base Class's Property Values?

Jul 5, 2010

bare with me during this silly example. :-) Let's say I have a class like this:

Public Class Animal
Public iLegs as int32 ' Number of legs
Public bWings as Boolean ' Wings? Yes/No
End Class

And another class that inherits the "Animal" class and adds one more property:

Public Class ScaryAnimal
Inherits Animal
Public iScariness as int32 ' 0-100, how scary is it?
End Class

Now, if I have an instance of "Animal" with some values in it, and I decide I want to cast it to a ScaryAnimal for some reason, how do I do that without having to create a new instance of "ScaryAnimal" and copy each property value?Basically I'm looking for a way to do this, without having to write the lines marked with '*** below:

[Code]...

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