XML Serialize Friend Classes
Sep 23, 2009
I have a few classes (about 15 or so) in VB.net (2005) that I would like to be able to serialize to xml. Unfortunately they are labeled as friend classes and cannot be exposed outside of the assembly.The assembly is a dll that is a com interop plugin to a CAD system. I have set all of my classes as friends so that they are not exposed outside of the assembly for 3rd party use. I am wondering if I even need to do that. Setting the class to public would allow me to serialize things. However I don't want people linking to the assembly and using the classes.Should I even worry about other programs linking to my assembly? In fact I don't think there is a large chance of this happening. I just don't like the idea of having almost all of my classes with a public scope.Is there a way to make a friend class serializable?
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May 9, 2009
I have one class with <Serialize> attribute called Tree. And Tree class has an arraylist of TreeNode classes. Is it possible to use Soap to convert the Tree class and arraylist of TreeNode classes to one xml file or binary file? If it is possible, do i need to use <Serialize> attribute on TreeNode classes too? If not, what should i do then?
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Feb 5, 2009
how can i serialize 2 lists(of classes) into 1 file?
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Aug 8, 2011
I want to download xsd specifications from a web service and automatic converting (serialize) these schemas to classes (visual studio - vb.net). If the organization that is responsible for the xsd schemas alter them in a way that only my class corresponding to the xsd have to be altered (not the rest of my code) I would like to automatic update my xsd corresponding class.
I use vs2010. What I want to do is: call a web service where I can send in an input parameter to the service which specifies the xsd I want to retrieve (the service is GetShemaDefenition and returns an object with the schema specification in a string property of the object). I den have to read the xsd string from the string property and convert this to a class representation of this xsd specification. Is it possible to do this automatically? I have done this manually by using xsd.exe. If the owner organization of the xsd has altered the xsd specification, I have to test if there is a new specification, and if there is I have to build a new class representation of this xsd? Is it possible to do what I want? And how would I know if it has been a big change in the xsd which also affect other parts of my code, not just the class representation of the xsd?
Update:I use one web service where one of the properties is a string. The string is an XML inside a CDATA block. The organization which provides the web service will not pares the xml inside the CDATA block but instead forward this to another organization that will use the xml data. The organization which uses the xml data specifies the xsd schem that I have to follow to generate my xml correct. This is the xsd schema I can get from another web service. I don't really understand what I can do with this xsd file from the web service. What can I do with it and why do I want to download it from the web service, when I can't use it automatically? Because I have to manually do the changes when the xsd changes I can easily download the xsd schema from the organization's home page and make the new class with xsd.exe.
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Aug 17, 2010
If a class is serialized and has events fired from it that are handled on a form you get the error "Form1 cannot be serialized" in c# you can use (to work around this):
[Code]....
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May 15, 2009
I can't make difference between public class and private class and friend and protected friend class.
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Apr 21, 2011
I've been reading about access modifiers in VB.Net lately, and there is something that I can't really understand: How do elements in a Class (or Module) inherit the modifiers of their enclosing block?For example, suppose you have a Friend class Bla in an assembly, with a public method Foo:
Friend Class Bla
Public Sub Foo
(...)
End Class
Does it behave differently than when Foo is set to Friend?
Friend Class Bla
Friend Sub Foo
(...)
End Class
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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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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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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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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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Dec 17, 2009
Who knows, why in vb.net WinForm projects the designer by default use the Friend WithEvents attributes and in C# - private ones.
By ex, in a form.designer.
.cs
private Label Label1;
.vb
Friend WithEvents Label1 as Label;
For WithEvents is more or less clear(for using Handles, apparently). But why Friend in VB and private in C#...
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Jun 30, 2009
I have class Aand BHow do i declare the class B as a friend of A?
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Aug 9, 2011
I have a Class with certain subs and functions declared as protected friends. From my understanding this should allow me to be able to access those subs and functions from anywhere in my project and yet it isn't working.
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Dec 20, 2010
I can think of the following tricks:
Read only wrapper - like ReadOnlyCollection. The friend keeps the pointer to the modifiable object, while everyone else can access only the wrapper.Write delegate - the friend gives the constructor of the object a reference to a delegate as one of the parameters, the constructor fills it with an address to a private method that can be used to modify the object.Reflection - obviously a bad idea. Included for completeness.Multiple assemblies - put your friends together in a separate assembly and set your modifier methods internal.Expose the modifiable object, but add comments to modifier methods "This is an infrastructure method - don't call it!"Nested classes.[code]...
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Jun 1, 2010
As far as c/c++ is concerned ,friend functions are defined outside the classes and they are accessed without object name.But in vb.net how can i create friend functions like that ? Is the concept same here or its bit different than what was in c/c++ ?
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Sep 14, 2010
When adding a new control to the designer in Winforms, the modifier on the control is set to Friend, but the default modifier is Private (right clicking the property and resetting the modifier). Is there a setting to set the modifier to default (Private)?
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Aug 13, 2011
Can we define a constructor with 'Friend' modifier?
Friend Class Reader
Friend Sub New()
End Sub
End Class
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Oct 14, 2009
A friend at work is trying to write a piece of database software for an HND project and when adding his database file, he gets the below error message. I'm too much of a greenhorn to know what it means, can anyone make sense of it?
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Aug 27, 2011
facebook friend add using regex,how? [code]
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Mar 21, 2012
The only place I've seen the Friend modifier used is in the WinForms designer, as alluded to in Why is the modifier set to Friend in Winforms? and VB.NET: what does the 'friend' modifier do?. The Friend modifier appears to be an almost arbitrarily wide access level that was created to solve some historic architectural problem in VB, I just wonder if anyone has a meaningful continued use for it?
I have had some desires to expose methods only to a given namespace so as to roll the functionalities of a related collection of objects together and manage any of their non-thread-safe methods, while exposing the safe public methods to a wider scope in the same assembly. This access level does not exist yet Friend does. Possibly a corollary question then, is my usage of assemblies and namespaces at odds with what is intended?
[Code]...
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Jan 19, 2010
Is it better to use friend or public forms in vb.net? What are the advantages of each?I notice when you import a vb6 project, the forms come in as friend, but when you add a new form in vb.net it is public. I have not seen any difference in the way they work, though, so I must be missing something.
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Nov 18, 2011
Is there a way to do something like this?
Public Enum CarMakes
Honda
BMW
Mazda
Friend Yugo
End Enum
I need to expose the the Enum to Public except for one of the items I just want to be available from inside the assembly.
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Jun 18, 2010
Why is it that some components/controls will not be inherited visually in a child form if they are declared with the access modifier Friend vs when they are declared with Protected. For example, I've got a DataSet object in my Parent Form that was initially "Friend" (I drag and dropped it to the form, so it was shown as a control in the designer view), but I noticed that my Child Form did not inherit the control as expected. Once I changed it to "Protected", it showed up in my Child form as expected.I am aware that Protected allows the Child Form to modify the inherited control, but how exactly does this tie in to the issue I described above?
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Sep 1, 2010
First of all let me say that while I was knowledgeable enough to create my program using VB-10 express I am by no means fluent in 'programming' speak .. so if you choose to help me please don't use technical jargon.. just explain as if you are talking to a 6 year old ..
Anyways I would like to give my program to some friends either by Email or via the internet (I have a website [url] (it is a wordpress blog) but I have no clue as to how I would get it onto my site.
I have attempted to Email the files .. first I had to change the file extension because Email would not send an .EXE file.. Then I tried to ZIP the files and send them via WINZIP but my recipients kept getting 'unable to open file' messages.
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May 11, 2012
I am working on a VB Windows Form and I have a question here about initialize an array (friend variable)[code]But this didn't work and it thrown an exception says Object reference not set to an instance of an object.I am wondering how I can have the array initialized to size 4.
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Jun 10, 2011
I'm playing around with VB.NET once again since college and I'm trying to recreate a program that GeekSquad uses called the MRI for a friend.Upon doing so, I have run into a few snags. The must present one is once I publish my application to a particular spot that also includes already setup folders with portable apps setup in them. I want to use Process.Start("App Path") where App Path is the drive letter of where the Custom Program exe is located and calling file Test1.exe in the test1 folder in the root.
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Jul 13, 2011
I made a program for my friend, a patient database program using VS 2010. I'm worried if my program messes up she loses all the records. Here's what I remembered doing. Maybe you guys can identify how I can fix this or you can give ideas on how to avoid the same mistake.
1. I used Visual Studio
2. I made a VB Windows Forms Application
3. I made a Service-Based Database called Database1.mdf which is a Dataset Model
4. I chose save connection string to Database1ConnectionString
[code]....
She was glad with how simple it was cause I made it with Visual Studio. Now I dunno how to export the database file from her computer/copy of program to make a backup. I dunno what to do.I know I didn't ask for anything in return but if the program messes up I'd feel bad. 1k+ records already jesus christ and the program has like 74 columns/textboxes.
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Feb 25, 2011
I'm currently trying to create a NEWID() function in my DataContext in LINQ using the solution here, however, when adding the partial class to my DataContext.vb or a separate DataContextPartial.vb, I get the error System.Data.Function is not available in this context because it is 'Friend'.
I've come across this when accessing data types before and that was in easy fix of setting it to Public, but I'm not sure where the properties for function could be or how to change them.The code I have is converted to VB.NET from the C# in the linked answer above:
Partial Public Class CMSModelDataContext
<[Function](Name:="NEWID", IsComposable:=True)> _
Public Function Random() As Guid
[code]....
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Aug 17, 2009
I have an application that I originally wrote in MS Basic. It has since migrated to VB6 and then to VB Net. It works, but recently I have been unable to rebuild the project and an attempt to convert from VB6 has produced an error on converting and MSMaskEdBox as an array.
The most recent problem arises from the line of
Friend ExcelGlobal_definst As New Excel.Global
This enables me to pass data to an Excel spreadsheet from my project. If I leave a blank after New, VB Net presents me with a drop-down list, which includes I have recently tried to convert the project on my laptop and the above line of code produces an error. When I try to add a property(?) after New, Excel is not in the list of those available.
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