Grouping Variables Within Classes?

Sep 8, 2009

I have a class called Trigger. within this class, I can perform a variety of functions, the main of which is to monitor a specific condition. In this class I have a bunch of class variables that are used to setup the condition as well as for information purposes after the condition has executed. All the conditions are stored in a database and when I start the program, I create a New Trigger class for each condition and store the variables (name, desc, action to perform once the condition is met, etc.) I was thinking about changing the class to create a Structure called Configuration where I would store all the variables. But then I would have to save the Configuration within the class so it could be used later on if needed correct?

[Code]...

but in looking at this i realized that I am creating a new structure and then creating a new trigger class where I am saving the Configuration structure which essentially seems the same as just using class variables as I was before. I also looked at creating a Configuration Class and a Trigger Class. then from the main class I would create all the Configurations and have a shared Trigger class that monitored all of them instead of having a single Trigger class for each Configuration. Using this method i could create a hash table that kept track of each configuration that was being monitored and stop it if required.

Does either method sound more appropriate over the other. I am just trying to understand when/why to do things a certain way.

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Grouping String Variables With Their Names?

Dec 13, 2010

I am trying to reduce the amount of code I have and make it more maintainable and flexible. (I.E Do it the right way). I have a bunch of (48) Form controls (text boxes) and when I click next on that form I save all their text values to some 48 global string variables. The names of these variables are the same as the Text Boxes but with "_saved" appended to them.

For any given operation instead of having a separate line for each control it's nice to just use a loop. I can easily write some code to operate on each Control (set visibility, enabled etc) by using Me.Controls and a For Each Loop. I can even make collections of fractional groups of the 48 controls. For example, If cntrl.name.startswith("sometext") collection.add or perform some other operation only on that subgroup etc.

I'd like to do something similar with my Saved Public String Variables. For example I would like to do the following loop somehow but don't know how to group Variables together and keep their name in a way where I can define that array or collection on 1 line or just a couple lines.

' But this next line only groups the values
Group_of_string_Variables = {Var1, Var2, Var3, Var4}
For Each Name_of_String_Variable In Group_of_string_variables

[Code].....

But I can not access the name of a variable or find a way to easily group in key/value 48 different ones without needing much more than 50 lines of code to make either a 2-dim array, a collection, or a hash.

I'm sure someone will tell me I should be doing it a completely different way. That would be ok as long as I don't have to change too much of my other code. I thought of making an object of some kind instead of a variable so I could access 2 object properties- name and value then I could group those objects in a collection as I have done before. But that seems like it would be many more lines of code and I'm not sure it would work.

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Passing Variables Through Classes?

Feb 8, 2012

I'm having trouble passing Variable information through classes, here is what I mean.

Example:
On my Form I call on Test.Result
Test is my Class

[code].....

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Provide Variables From Main To All Other Classes?

Oct 18, 2009

I have a need to provide mouse coordinates and click details to the sub-classes of an application. The details are stored in a typed variable in the main class, as they are not processed when the event occurs.

What is the correct way of getting the classes to refer to variables in the parent class that instigated them? I realise this is not standard practise, but at this stage in the project I am converting code from a procedural language and need to do this as an intermediary step. Using the mouse events is also not possible, as this is a DirectX-oriented real-time program, and some things still have to be processed procedurally. They have to be stored via the event and then processed manually.

I may have dozens of instances of the classes, so distributing the mouse data every time it changes is not a good option. Ideally, the class should be able to retrieve the data when it needs it.

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Suppress Private Variables In .NET Classes?

Feb 28, 2010

Does anyone know how to supress the private variables from showing in the .NET Namespace? I have a Class that looks similar to this.

[Code]...

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VS 2010 Public Variables For All Classes?

Mar 30, 2011

I have a MDI application and a very complicated class there which populates its properties from a dataset derived from an external database. Each form, including child forms have to be able to access that class and use its properties thorughout the whole session.I don't know where to 'preserve' these property values within the application. I kmow many books etc. suggest not to use public variables but I really can't find a way to solve this other than to use a public variable (which is a list(of my custom class) in this case.
I have a separate class called PublicItems.vb and declared there my public variable as

Public Shared secuniverse As List(Of myCustomClass)Is there something wrong with the syntax because if I try to use the variable secuniverse in my main application class, I get the following exception:'sectoruniverse' is not declared. It may be inaccessible due to its protection level.

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Losing Class Variables - Use Classes More In My Programs

Sep 24, 2010

I'm trying to use classes more in my programs. I'm using classes. This is the section of the main form that is causing the problem:

If conType = Nothing Then
TaOrIbt()
End If
objGetECaptureType.CaptureType(conType)

[CODE]...

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Use LINQ To Filter Collection Of Nested Classes To Yield Dictionary Of Unique Properties Of Those Classes?

Jan 23, 2012

I have two classes, one nested in the other. [code]Neither "Name" or "ID" are unique between operations and records.I wish to construct a dictionary using LINQ = Dictionary(Of String, Of List(Of Integer), whereby the keys are uniqe examples of Names in my collection and the values are the collective set of distinct IDs that are associated with those names.

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VS 2010 Structure Classes So That The User Interfaces Though A Single Class While The Supporting Classes Are Hidden From Their View?

Jun 13, 2012

How can I structure my classes so that the user interfaces though a single class while the supporting classes are hidden from their view? I think its best understood in an example:

Public Class MyInterface
Public Economic as EconomicClass
Public Sub New()
MyBase.New()

[code].....

So you might ask why am I even separating them? It's strictly for others who will be working with this interface. I need to funnel them though a logical structure:

interface.Economic.MyMethod
interface.Currency.MyMethod
etc

This way everything is already handled for them in the background and they only need to run the method they need. I don't know if I can have it both ways in VB.NET.

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VS 2010 Calling Subs And Functions Within Classes That Are Within Classes?

Oct 24, 2009

Here is some example code of what I mean:

vb
Public Class Form1
Private Sub Button1_Click(ByVal sender as Object, e as systemEventArgs) Handles Button1.Click

[Code]....

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Derived Classes Cannot Raise Base Classes

Jul 10, 2009

I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....

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.net - Grouping Using LINQ?

Feb 5, 2010

I'm having a heck of a time with transforming a simple SQL Query into a LINQ query(using vb btw)

Here is my SQL:
SELECT USRDEFND5
FROM int_gp_employee
GROUP BY USRDEFND5

[Code]...

I've tried a number of different variations of the LINQ. My current statement is:

From b In xmlFile...<row> Group b...<usrdefnd5> By b...<usrdefnd5> INTO group when I foreach through the resulting collection, EVERY line (17000) shows up.

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VS 2008 - Take A String Of Variables With A Common Delimiter And Break It All Back Out Into Separate Variables

Dec 11, 2011

Last year (2010) I came across a FANTASTIC command that allowed me to take a string of variables with a common delimiter and break it all back out into separate variables (possibly an array) with one statement.

[Code]...

As long as the delimiter was a unique specifiable character, this one-statement command could break it out into elements. my memory and point me in the right direction.

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Passing Multiple Byref Variables / Variables Fail To Change Calling Funct W/ Invoke

Sep 27, 2010

I have code, shown below, that works all except for 1 thing: The variables being passed byRef get passed, but once modified in the else section of the "if me.invokerequired" code of RecordData, the variables are never updated in the calling function. To reiterate, the calling function does not receive the updated data that is in the variables custid and amt.When debugging, I see the data change in the else section of "if me.invokerequired", but once it returns from the callback the data is missing.[code]

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Define Some Global Variables Of A Class - Variables Occupy Memory?

Mar 23, 2012

I define some global variables of a class as follows:

Private Class MyClass
Private var1 as Decimal
Private list1 as List(Of string)[code].....

But I found that after this form is closed, all above variables, var1, list1, list2 still exist in memory. I thought they should be collected by gc since the form is already disposed as I confirmed.

Add: I have monitored half an hour after the form is closed. But these variables are not collected by gc. I have an automatic update procedure on the form which uses above variables.Since the above variables still hold values, the automatic update procedure is always called which causes exception. (One quick fix is to check if form.isDisposed in update procedure. But I do not think this is elegeant. Besides, these variables occupy memory.)

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.net - Grouping Application Settings?

Aug 12, 2011

My VB.net application has a lot of application settings, is it possible to group them somehow(other than having a common name)?For example, my application has a lot of winforms each of which needs to save some information about itself. Is it possible to use something like:

Form1.width = My.Settings.Form1.Width
Form2.width = My.Settings.Form2.Width
etc.

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.net - Linq Nested Grouping?

Jul 7, 2009

I've a large table of Items and I need to organize them by Category, then by Year and then by Month.Item has CategoryID and Dated properties.I got this far:

Dim Items = From Item In DB.Items _
Group By CategoryID = Item.CategoryID _
Into Categories = Group _
Order By CategoryID

But where I put the:

Group By Year = Year(Item.Dated)

and the

Group By Month = Month(Item.Dated)

The final result should be something like this:

For Each Category in Categories
For Each Year in Category.Years

[code].....

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Asp.net ListView Or Repeater Grouping By Three

May 8, 2012

I am using a nice shopping cart I found online. I would like to translate this code to use a repeater or listview and dynamically retrieve my data, but I cannot seem to find a way to group my data correctly.I know the ListView can group by a certain amount of items, but I have not found a way to do it with this scenario.The shopping cart works by having a ul list of items, followed by their details in the div below. This process starts again by getting three more ul items, followed by three more details. How could I do this using a ListView or repeater? I have not found a way to repeat both of these sets of data I need in a group of three.[code]

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Datatable Grouping Using Linq?

May 25, 2011

I'm completely dense here, but I'm trying to get some stats from a DataTable. One of the columns in the datatable is called "colour".I need to find out how many of each instance of "colour" are in the datatable.

I'm trying:
Dim q = From p In PGWorkingDataTable _
Group p By p("colour") Into Group _

[code].....

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Forms :: Grouping Controls Using Tag Or Name?

Feb 24, 2010

I am trying to group various controls (of the same type, e.g., labels together, buttons together, etc.) on a form using a tag or a name of some sort so I can identify all those that belong to tag 'A' and those in tag 'B'. In the end I will have on a form a number of labels grouped as tag 'A' and some labels as tag 'B' so I can change their visible properties on/off.

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Grouping Applications In The TaskBar?

Sep 2, 2009

If a user has a few of my applications open and he/she minimises them I would like to group these in the task bar like MS Word for example.

Product Name - Application 1
Product Name - Application 2
Product Name - Application 3
Product Name - Application 4

Because all of my applications begin with the product in the Title bar can this be achived.

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Grouping Code For Outlining?

Oct 1, 2011

I have multiple sub's that i'd like to group together, however all of the groups need to be in the same class. They all work together, but it would help me organize the code and make it less confusing if I could group some of the different subs together for outlining purposes. Is there a way to do this? I tried to find answers online, but I couldn't find what I was looking for.

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Grouping Data From Two Dataset?

Mar 28, 2010

i've got a problem with dataset:

I've got two dataset from two different server but they have the same columns.
so it's like that:
First DataSet :

[code].....

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ListView Control Grouping?

Feb 17, 2010

I did attempt searching but it just gave me a "505 bad gateway error".So my issues is the grouping header isn't working lol.

ListView1 - name of the ListView control
3 columns added to lv
3 items added to lv

[code].....

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Repeater Grouping By Months

Jan 18, 2012

My repeater is searching through dates in the SQL Server database and returning the first 3 letters of every month. Is there a way to show the repeater the way I want to? [code]

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VS 2005 ReportViewer Grouping?

Jan 5, 2010

I am making a report using the reportviewer. I have grouped the data and the group works. But when I try to put some data in the group header, I get the following error:The Value expression for the textbox Dep_Name refers to the field Dep_Name. Report item expressions can only refer to fields within the current data set scope or, if inside an aggregate, the specified data set scope.

The data I am trying to display is from a different table then the one that I am using to group the data. Does this mean there is a problem with the relationship between the tables?

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Memory Used In Declaring Variables Are Reclaimed By The OS When These Variables Go Out Of Scope?

Jan 7, 2010

Does the memory used in declaring variables are reclaimed by the OS when these variables go out of scope?Does the memory used be released by setting thier value to nothing? if not, then how can I force the garbage collector to run or excecute at a certain/desired time..How about in Windows Forms..How can we make sure that the memory used in initializing and showing forms be released if those forms were closed?

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Multithreading: Reading/setting Variables, And Passing Variables?

Mar 8, 2011

Question 1: What is the difference between "Background Worker" and "Worker Pool" as indicated within the MSDN samples provided.

Question 2: I noticed while using, AddressOf _Function_, variables cannot be passed; what would be an efficient solution to this?

Question 3: While using multithreading is it required to invoke before setting variables, or only form properties?

Question 4: While using System.Net.Sockets is it safe/efficient to use Application.DoEvents while waiting for new data; or would be using a Do While loop be fine without DoEvents since the action would be multithreaded? Note: there can be up to 2000-3000 sockets in use at a time.

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Use Variables Or Properties, And Global Or Static Variables In A Class?

Jun 9, 2012

I'm new in .NET programming.I have a class Form1 that includes Button1_Click event.Button1_Click creates a multiple Text Boxies at run time)Here is the class:

Public Class Form1
Dim shiftDown As Integer
Dim counter As Integer

[code].....

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Any Object That Supports Column Grouping

May 25, 2010

Is there any object that supports column grouping in VB.Net. Because I've been trying datagridview with no success.

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