Creating A Class And Referencing It

Feb 20, 2009

how to create a class yet, and I think I need to learn how.I am wanting to shorten my code in a form, thinking of creating several classes to do so.Lets use a Listview as a reference if you dont mind.Say there is a listview, you have a numeral amount of if statments to fill by. Is there a way to create a class(is this the way to go) so that you can open the class to modify that specific block of code? Example of questionYou have multiple items you need to add for each if statement. Animal as a group Dog as an item 14 years as a sub item Cat as an item 11 years as a sub itemIs this the way to go, if so how do you create a class and call it from a form?Davids Learning

View 4 Replies


ADVERTISEMENT

Dynamically Creating And Referencing Objects?

Mar 17, 2009

I would like to dynamically create an object (in my case a thread) and then be able reference that object. Simplistically put, I would like to read from a text file and then process each item using a thread (so that I don't have to wait for each item before starting the next). The problem is that I cannot think of a way to create a new thread dynamically ie. thread name so that I can then wait for all created threads before doing something else.

View 8 Replies

Referencing A Class As A Web Service

Nov 18, 2011

I am building application that will be hosted as a web service. This app takes an employeeID and returns an employee object that contains lots of info regarding the employee. (name, status, full-time/part-time, etc)I want the two existing apps we have (and more to come) to be able to call a method that the web service will have and return the employee object. (also at time this web service that returns the object may have new fields added to it - Pay rate, etc)How would I go about creating a new object from this web service reference in the existing applications.Would I decalre it like Dim Employee as new emp_webservice.employee? And then be able to use this object within the app? Or would the better practice be to also included the same class files? It seems like this would not be the way to go, since if I make a change to that class I then have to make it in all places.

View 1 Replies

Array Of Self-Referencing Objects In A Class

Aug 23, 2010

How can I implement a tree structure (Octree) in Visual Basic.

that is to declare a class containing array of objects of same class type - like

Class Node
{
dim ....

[Code].....

View 3 Replies

Class - Using Variables For Referencing Objects?

Feb 25, 2010

when using variables in object names.I have a Public class which is called "Tank".In that class, there is a public property called "direction" of an integer type.I keep getting the error:

"Tank is a type and cannot be used as an expression"What I'm doing wrong here ?

Public Class mainroutines()
Create Instances of tank
Private Tank1 As New Tank()[code]....

View 3 Replies

Referencing Another Variable In Form Class

Dec 24, 2011

How do you reference a variable in another Class?
Public Class Form1
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
TextBox1.Text = "Class1_Text" ' Would like to replace w/correct code
End Sub
End Class
Public Class Class1
Public Class1_Text As String = "Class1 Text"
End Class
I can reference the Form1 data in Class1 but not vice-verse.

View 8 Replies

SNMP Class - Error In Referencing

Jun 4, 2011

I have created an SNMP class. And then I want to test this class, so I create a program which imports this class ...
Imports SNMPClass
Module Module1
End Module
Public Class SimpleSNMP
Public Sub Main(ByVal argv As String())
[Code] .....

I got an error in this line
Dim conn As New SNMP()
Which says "SNMPClass.SNMP is not accessible in this context because it is friend"..
I am using Visual Studio 2008

View 1 Replies

Asp.net - Referencing Class Library In Inline Vb Code

Feb 15, 2012

I'm working on a legacy vb.net application that does most of its work using inline code ( Within that script I need to access functions from a third party .net dll. The dll(s) themself are stored in the GAC. Before I started the page looked something like the following

[Code]...

View 2 Replies

Dynamically Referencing Class Property With A Variable?

Feb 4, 2009

So Im iterating through the properties of a class. For each property Im iterating through a datatable until I find a column name with the same name as the property.

No worries so far, here's the isse: Once I've found a match I want to set the class's property to the value in the datatable but I'm having difficulty referencing the property as it has to be done through a variable.

Code:
Dim per As New Person
Dim t As Type = per.GetType
For Each p As PropertyInfo In t.GetProperties

[Code].....

View 2 Replies

Referencing An Object (class) Within A Thread Fails

Jun 8, 2012

Referencing an object (class) within a thread fails

I have an object ("a vb class") that needs to run on a separate thread and communicate with the U/I.

Even using sample code, I cannot get the object to run within a thread. I demonstrate this problem with two examples. The first calls a function within the form and it works perfectly. The second creates an object and performs the same calls, but fails.

example #1 [working] (Called within a form)
Private Delegate Sub FuctionToBeRunInThreadDelegate
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

[Code]....

SUMMARY: When the thread creates the object, it appears that the object is not actually running inside of a thread or else form.InvokeRequired would be true. I have other more complex examples where this is strongly verified and evidenced, but I provided these two as a very simple demonstration of my problem.How can I have a thread "own" a series of individual objects so that the objects are run asynchronously and can independently report back to the U/I?

View 1 Replies

Class Referencing - Form4.vb Doesnt See The Shared Class1

Aug 12, 2011

I have class file class1.vb with 3 classes class1 , class2, class3. a class file class10.vb with class10 class11 class13

I declared class 1 public and declared a public shared new instance of class11 in class1 at the top

All classes in class1.vb can use this shared instance, but a form4.vb doesnt see the shared class1.(new instance of class11)

View 1 Replies

VS 2008 Referencing A Property In The Parent ITEMS Class

May 6, 2010

I have a collection class, say ITEMS, that inherits a Dictionary (of String, SINGLEITEM). From the SINGLEITEM class, I would like to reference a property in the parent ITEMS class, what is the best way to do this? For example, say the ITEMS class has an IsDirty property and I would like to set that if ANY of the contained SINGLEITEM objects is modified, what's the best way to go about doing this?

I know I could add a reference to the collection class in each SINGLEITEM class (since I override the ADD method, I could make this assignment), but this seems like overkill.

View 1 Replies

IDE - Upgrade To 2010 Projects Referencing A Class Library Targeting A Different Framework Fail To Build

Aug 18, 2010

Say I have a Framework 4.0 project that is referencing a class library targeting 3.5. The project will simply not build. It won't give me any valid error message it will just act as though the reference does not exist.

Projects that were working like this in Visual Studio 2008 are no longer working in 2010. Took me forever to figure out what there error is. If I remove the project reference and add it back the intellisense lights up and you can tell a variable referenced in the class library is found. But as soon as you build the project everything is lost. My using statements get underlined, references to the variable all turn grey and project fails to build saying the class cannot be found. Once I make the class library 4.0 as well everything builds. I get the same issue between 4.0 client profile and 4.0 as well.

View 1 Replies

Creating An Instance Of A Class From A Class Library?

May 18, 2010

I've createda vb.net class library where I've defined a number of small classes... nothing complicated, just working with strings, sending emails, etc.In another project, I reference the class library and I'm seemingly able to create an instance ofone of tclasses - intellisense shows me all of the plic properties, methods, etc... all looks perfect. No compile errors at all, nothing b gumdropsand lollipops.When I run the app I'm working on that references the class library, it fails at the point where I'm creating an instance of the class and gives me a vague exception, "System.TypeLoadException".

View 2 Replies

Class Libraries (.dll's) Referencing Other Class Libraries (.dll's)?

Dec 17, 2010

I designed 7 class libraries for 1 project.The project references all 7 libraries.3 of the 7 libraries make references to the other 4 libraries.I thought of just duplicating the code that's referenced in the other 4 libraries, but thats a lot of code.

Example:

PrjctA makes reference to LibA, LibB, LibC, & LibD.If LibA references LibB & LibC also will this fail?

View 5 Replies

Creating An Exe And Best Use Of A Class?

Aug 2, 2010

I have a project where I need to create an exe that will execute through a scheduler every five minutes The visual basic file will call a SQL Stored procedure, get values and then write these values to a separate database system (that is NOT SQL).

View 4 Replies

Creating A Combobox From A Class?

Jan 30, 2012

my query is:

file: read.vb
Friend Function Nav()
Dim NavBox As New ComboBox()
NavBox.Size = New System.Drawing.Size(44, 21)

[code]....

Now what i need is, a access to its control so i can parss value from mainFrom.vb to read.vb to manipulation the SelectionChangeCommitted activity.

View 1 Replies

Creating A Datagridview Class?

Jun 18, 2012

I have a one form with code that has lots of subs and was wondering if i can shift some of these subs to a class or module to make the main form coding less clutered.

View 4 Replies

Creating A Dice Class

May 24, 2010

I'm working on the code I used to make the animated dice program in my sig. I've done a bit of modding on it so I can re-use parts and it still worked fine, until I tried to put everything in a class so that I could just create new instances of a certain die.

I was heading towards the idea of creating a new instance of the die by a number in a textbox on the main form. Right now I am just working on the basic d6 just to get it up and running.

QuoteAn error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'

I am probably going about this the wrong way all together and could use some help because I can't see how the class is referring to itself at all.

[code...]

doesn't look much better in the original program, but it actually works in that so if it helps just click the link in my sig to go to the post with the original download.

Since I am going to want all the various dice to Rotate() and Move(), I am wanting these to be generic so that I can use them no matter which die is trying to access it which is why I have tried putting them separately in their own subs and just passing the picture ByVal. I'm not sure if, or how, to put these in classes of their own or not.

And I have looked at just about every dice roller and Yahtzee example I can find, but none of them actually try to rotate the dice like I have, and they pretty much just calculate by using simple random values...which is okay, but does squat when the values are actual objects instead of numbers (if that makes sense).

Nothing I can find tries to put this stuff in classes, which makes it even harder to determine what really should go in the class files themselves. I really just can't find an example that I have been able to get to work for my purpose, nor figure this out on my own.

View 14 Replies

Creating A List In A VBA Class

Nov 18, 2011

I would like to know how I can get the list of possible choices to Intellisense for my class object, like it does with MsgBox.For example, when creating a message box you type MsgBox "Test Message Text", vbYesNo, "Test Message Title".In typing that, when you type the comma just before the vbYesNo, it gives you the possible selections for button types in a drop down list: i.e., vbYesNo, vbOKOnly, etc.I have a class called clsKeyState. what it does is turn on/off/toggle key states, such as CAPS LOCK, SCROLL LOCK, NUM LOCK, etc... I have set my property for it as Get/Let "State". When I call it to set a key to on/off I will be doing it like this: KeyState.State WhichKey, On/Off/Toggle.I would like the WhichKey part to automatically display all the possible selections that I define, such as CapsLock, NumLock, Scroll Lock; and I want the On/Off/Toggle to display those specific items also (On, Off, Toggle). I will be using the ability to create these displayable options for many more things in my project than just this one simple class.

View 3 Replies

Creating An Array Of Class

Jan 15, 2012

How can I create an array of a class that I have declared? I have this class named partswith properties of frame, engine and date, and i want to know how could I store them in an array .

View 1 Replies

Creating NEW Construct In A Class?

Dec 31, 2009

I have an application in VB.Net and now I find out an API is not compatible and requires VB6. I am trying to convert it back to VB6 and have an issue in a Class Module. In VB.Net, I have:

[Code]...

View 7 Replies

Prevent Creating New Class

Mar 12, 2011

I am making a class that will behave like a collection class. I want to prevent the end-user from creating a new class of this. For example, the following should give error:

[Code]...

View 10 Replies

.net - Creating A New Instance Of A Class Object Box()

Sep 29, 2011

my aim is to create a new instance box at the push of a button, the box has strings name and Id to be filled concatenating the auto generated ID i.e. 0 to 210 plus a string "Box" added by the user. I had problems earlier creating a structure within the class box, frankly I am not sure if the code below will work, as i try to run it in VB I get an error indicating that I am using the variables strBoxPositions() and strBoxNumbers() without assigning a value to it. The thing is the strBoxPositions() should automatically be filled by arrPosition() which will be created at the same time the new object box is created and the strNumbers() will be created with empty strings to be filled at latter stage by the used as and when necessary.

how could I initialise those arrays to get the program to run and perhaps ill be able to see if the code works or not, or just correct this code with a better way of code with comments, also if possible some indication on how could I update the strNumbers array inputing the strings one at a time on a text box field.

Public class form1
Public Class Box
Public intBoxID As Integer

[Code].....

View 2 Replies

.net - Creating Geometric Shapes As A Class?

Apr 17, 2011

how do I create a geometric shape as a class? Visual basic has a Rectangle class pre-defined object that I would like to use, but I need to use a rectangle class that can use decimals for the 4 points to set its location. I do not want to draw a shape on the form for graphical reasons but I want to use the shape for an algorithm, how can I create a class for a rectangle using decimals?

View 1 Replies

Creating A Class That Contains Other Classes/Objects?

Aug 27, 2010

I'm wondering on how you would go abouts instantiating a class that contains other complex objects. for example an Payment Class which has Date,Time, etc.. and it also holds a reference to a paymethod object which has id,Type,Description etc.. How do you instantiate the payment class with all the other objects without one or the other failing, how do you create the payment class which doesn

View 4 Replies

Creating A Partial Class For A Form?

Nov 30, 2010

I would like to create a partial class for my form. I have a lot of events, and it gets messy, so I would like to break up sections into their own files. The problem: When I create a partial class of my form, say:

Partial Public Class Form1
End Class

Visual Studio decides I need another form for this partial class.

1. How do I create a partial class for a form?

2. If I cant do that, how can I break up all the events in my form into different files?

View 3 Replies

Creating A Proxy Class From Wsdl?

Feb 9, 2009

I am a complete Newbie to VB.NET and am migrating up from VB4, so please forgive my mistakes.I am trying to create a proxy class using the WSDL tool included in Visual Basic 2008 Express Edition. I have managed to create the file successfully through WSDL tool, and then am able to add this file as an item in my VB project, however, the file that is added, comes up with 11 errors that I am not familiar with. The command I am using to create the file with WSDL tool is as follows:

wsdl /l:vb /protocol:soap http://direct.racetab.com.au/LiveOdd...gin/Login.wsdl This creates a file called Login, however it creates it, inside the folder that the WSDL tool is located in, which happens to be:Program Files/Microsoft SDKs/Windows/v6.0A/bin I then go to the solution explorer and right click the 'My Project' folder and select ADD>Existing Item, and then navigate it to the file that was just created.

This creates a new item in my solution explorer called Login.vb however, as soon as it is created, I get 9 errors and 2 warnings, that absolutely confuse the hell out of me, and all point to this new item 'Login.vb'

[Code]...

I am doing wrong, what I have forgotten to do, or how I can work to get around this problem? If I need to supply any more information, please let me know what you need to know. Also, if it helps, the only method that I plan to use from the above file is the GETKEY(userName, password) method.

View 2 Replies

Creating Custom Generic Class?

Jan 1, 2011

Here are essential excerpts for the code creating the class and the page using it:

Imports System.Collections.ObjectModel
Public Class Test (Of T as xyz)
Inherits Collection (Of T)

[code].....

View 7 Replies

Creating Instances Of Own Class At Runtime?

Sep 3, 2011

info on creating instances of my own class at runtime. Simple project for family recipes but would like the option to add new recipes with new instances of my own food Item class at runtime. Creating my own class,no problem. Storing the data in an XML file, OK on that as well. My issue is creating new instances of different food item class as I use this program over time

View 13 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved