Using A .Net Class DLL To Control Webapge And Access Dayabase?
Sep 9, 2010
I am using a VB.Net Class DLL to control my webapge and access my dayabase, which is created and destroyed with each page visit.My question is: What's the best method of accessing database.
I am currently doing functions like this
[Code]...
Now Init() is called as the very first code in my webpage and DeInit() is at the very end.I am confused, because I have been told that ADODB objects should be created and destroyed as soon as you no longer need them. Would Method 2 be better, since Method 1 would be creating and destroying ADODB objects several times per page view?
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Jan 19, 2011
i have a usercontrol named filebox (which wraps a fileupload and some related stuff)
in a certain .net class i have need to use this type as a ctype
but i cant seem to call ctype(aobject,filebox)
or either ctype(aobject,Controls_filebox) (which is the correct name)
how can i convert an object to this type?
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Jun 3, 2009
What is the best way to access a value of a control within a form outside of the form class. I have a lot of functions defined in a module, one of these functions requires a series of values from controls in my main form such as the FolderBrowserDialog.SelectedPath element. I understand that these cannot be accessed in the format form.FolderBrowserDialog1.SelectedPath and that they need to be accessed using a delegate. This is the part I am stuck with.
[Code]...
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Aug 18, 2009
I have some classes, BsfciFile and StudyFlashCard. Bsfci is the extension to which I save my set of flashcards in an INI format. I am currently working to transform my code from using Windows API calls to access the INI to using a IniFile class that I found on the internet. I would like the BsfciFile to have a Array of StudyFlashCard objects, but I would like the StudyFlashCard class to use the IniFile class object contained in the BsfciFile class. I can pass the IniFile from the BsfciFile class to the constructor for the StudyFlashCard class, but I want it to modify the same IniFile as the BsfciFile class has later on.
[Code]...
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Mar 30, 2010
This is a bit of a continuation from a previous post for which AtmaWeapon was very informative.
Problem:
A parent class has a sub class with various properties. A property of the parent class is a List(of T) with T = the sub class The issue is how to store data in the sub class of the instantiated parent
Some example code (hopefully formatted correctly):
Code:
'=========== Class Definitions =============
Public Class courseClass
Public Class timeTableClass
[Code].....
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Oct 22, 2010
How do I access the base class inside a derived class?
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Feb 15, 2011
I have a very simple class that is located within my App_Code folder in my VS2008 web application project. I am trying to instantiate an instance of this class from my code-behind file. Intellisense does not seem to be seeing my class and I am not sure why. I am using VB.NET which I am admittedly not that familiar with as compared to C#. Perhaps I am missing something. I would bet it has something to do with something I am missing in VB.NET.Here is my simple class (for testing):
[Code]...
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May 13, 2011
Example:
Two files - TestClass.vb, myForm.vb
TestClass.vb looks as follows:
Imports System.Threading
Public Class TestClass
Private myClassThread As New Thread(AddressOf StartMyClassThread)
[code]....
The result:Application runs, no errors or exceptions.Displayed is the listbox and the Start button.I press the start button and a msgbox says "Not Invoked" as expected and upon clicking OK to that msgbox "Start Button Pressed" is added to the Output listbox control.Immediately following that the msgbox pops up again and says "Not Invoked". I was expecting "Invoked" as a separate thread is trying to use the Output listbox control.Of course this results in the Output.Items.Add being attempted which results in no visible result as the thread is not allowed to directly update the UI control.
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Nov 21, 2009
I am searching for the Component Class. When I go to "Add New Item" ,in my project their is no Component Class Item in VS 2008. I would like to Drag and Drop control onto my new class and I can't see how to do this ?
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Jan 12, 2012
Is it possible to set a variable in my custom class for Private Read/Write access and Public Readonly access without creating Properties with Get and Set? In other words, from within my class I want full access and from my form I only want read access. Right now I declare my variable as either Private or Public to control Public read/write access. I tried googling my question a bit but I'm not sure what the correct terms even ar
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Feb 12, 2009
I Need Build a user control which works as a Login control using Windows Class Library or Component Template:The user control returns the user name and the password It means that the control has minimum two ReadOnly Property procedures. You let the user of your control (he/she which uses your control in his/her software) to set the background colour of the two labels. Create a Windows application to test your control.
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Feb 28, 2011
I tried it and get an error but maybe I'm tring the wrong way. Can a usercontrol inherate an application defined class ie.. could you inheritance a classic rect class into a user control to add the hight and width properties to the control without having to do all the coding all over again? Currently I just declair a private instance of the class within the control and then encapsalate. It would be nice if I could just inherit all the functionality of my classes into controls designed to implament the classes.
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Apr 13, 2010
This is my first major application using multiple classes. It is written in vb and I know about creating objects of the class and using that instance to call functions of the class. But how do I create an object with constructors to allow another program written in C# to access my classes and functions and accept things from the program.
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Nov 11, 2011
if I put controls on form1 like button,textbox....etcwhy called this control fields not object in the class diagram ?
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Oct 13, 2010
I am using .ocx in my project. I made some changes into .ocx. and compiled it. Afterthat I unregistered the old one and register the new .ocx. I changed reference from my project as well. This .ocx is related to display of new form so whenever i m trying to load new form it taking to much time. In .log file of my project i m getting error "control XXX was not a loaded control class"
It seems like its not finding the correct .ocx at the beginning. But afterthat it works fine but very slow.
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Aug 15, 2011
I have a set of XML routines stored in a public class. There is a "sendMessage" function in this class. I'd like to be able to hit a button and have that function executed from my main class.
' Form = Main
Public Class Main
...
[Code].....
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Mar 21, 2012
I am creating a simple XML web service and have run into something I can't quite explain.My web service class has the following structure :
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
[code]....
Invoking my method using the built in VS web service test harness works fine. I created another project, in another solution, to test consuming the web service. I added a web reference to my project and set it so I could reference my web service by using "localWS". Then in the page load event of my consuming class I tried to instantiate an object of my web service:
Dim srv As New localWS.MyWS
But there was no "MyWS" type found. There is however a localWS.MyWSSoapClient class. When I use it I can invoke my web methods. My question is, why can't I create a straight up version of MyWS class? In the tutorials I'v read, and in the book I have, example consuming classes for .NET XML web services can instantiate objects of the web service class they are consuming. As a further test I added a new web form to my web service project and from there I was able to instantiate a MyWS class.
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Apr 13, 2011
I've encountered a problem which challenges my understanding of access modifiers in VB.Net. I have a class declared Friend. If I declare its properties Public, the application works. If I declare them Friend, the application fails.
Before this, I believed that, in a class declared Friend, it would make no functional difference whether I declared the members Public or Friend. I thought class access declarations applied their restrictions to all nested entities, so nested properties declared Public were effectively restricted as if they had been declared Friend. Obviously, I was wrong. Can anyone explain how access modifiers really work, or point me to the relevant documentation?
Here is a more detailed description of the situation: I have a Friend class called StripTask with properties called StripDate, HistorianDate, and TaskText. I have a collection of StripTasks (called _StripTasks) which is used as the data source for a Syncfusion GridDataBoundGrid. The way the binding works, I need to pass the name of a StripTask property to each of the grid columns so each column knows what data to display. It ends up looking something like this:_DataBoundGrid.GridBoundColumns(1).MappingName = "StripDate". When the mapped properties are declared Public, it works. When the mapped properties are declared Friend, the grid is populated with the correct number of rows, but every cell is empty.
As a follow-up question, is it a good idea to avoid things, such as this Syncfusion binding method, which require me to pass property names as strings? It just feels as if I'm inviting trouble.
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Mar 4, 2012
I want to do this: [URL] but in VB. I believe that is for C# I have 2 classes.
[Code]....
I know I've been asking too many questions lately and I do apologise for that. I am trying to learn the basics
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Oct 14, 2011
I have two classes[code]...
How can I modify class1 in a sub in class2?
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Aug 27, 2011
Private _Order As Order() Public Property Order() As Order() Get Return _Order End Get Set(ByVal value As Order()) _Order = value End Set End Property
I need to get property name 'color' inside the 'order()' array, i am trying ' Order.color ' but its not getting,
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Dec 1, 2011
how to access the variable from another [Code] I need to call the variable invoiceno in the class xmlserializer using ord1 and assign the value which the user enters during the runtime.
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Oct 18, 2011
I have a class called class1, in that class i wan;t to write something in a textbox in form1, but it won't let me access Form1.TextBox1.text, another problem is that it won't give me the save dialog in excel, but thats another problem.How can i acces Form1 controls?
Form1 code
Public Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Call ThisDrawing.GetFilepath(True)
If Me.TextBox1.Text = "" Or Me.TextBox1.Text = "False" Then MsgBox("Er is geen geldige filenaam opgegeven")
End Sub
[code]....
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Dec 18, 2011
Example ^. I must be forgetting something or being really dumb.
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Jun 30, 2011
I have two classes in two files in a class library project, they are:
Public Class Logins
Public CurrentUser As Login
Public Function Authenticate(ByVal id As String, ByVal pw As String)
[Code].....
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Feb 7, 2012
So, I am reorganizing a winform application I wrote to make it more readable and maintainable. The previous structure I used had:
1- a login form with some connection objects
2- an import process start form with some import objects
3- a log writer class that receives data from the import process and writes a log file at the end of the import process
The code quickly got too messy, so my goal now is:
1- a login form with only form events
2- an import form with only form events
3- a class with all the functions
Basically, my class with all the functions (3) looks like this:
Public Class MyProgramMainClass
Public Function test()
Dim testing As String = "test"
[Code].....
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Dec 8, 2010
I"m developing a small app in silverligh with VB
I created an :SQL Database , ADO.Net model and a Domin service
The code was auto generated for me.
All im trying to is access the class and call my query.[code]....
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Nov 16, 2010
I have a function that updates a Client in the database. A client object is passed in, along with a string array of fields/properties that should be updated. I need a way of accessing each property in the client object, based on what is in the array. Basically, I am looking for the VB .NET equivalent to this javascript:
var fields = ["Firstname","Lastname","DOB"];
for(field in fields)
{
[code]....
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Oct 21, 2010
I have a web site project in which I added a "Class.vb" file to hold public functions/procedures/variables. I'm trying to access a function within this file from my code-behind file from an aspx page. I've called the Class file "Module1"; Publc Class Module1.[code]...
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Jun 10, 2012
Create a web browser with tabs and I want to add a "Open in a new Link" Button with a Custom Menu .
The problem is I'm trying to use a Dynamic Control(Webbrowser) created in a class from a local sub (A picture box) on the event click . But i get this error [code]....
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