Do you really need this keyword to overload methods? What is the difference between using the overloads keyword vs. just having different method signatures?
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From what I can see online the Overloads keyword is optional but is there ever a time when it is necessary? It even seems to be an error when used in a Module.
View 3 RepliesDifference between overloads, overridable and overrides .
View 1 RepliesComing from C#..I was looking at this website [URL]..And noticed that it said
public static void Main(string[] args) {is equivalent to Overloads Shared Sub Main(ByVal args() As String)
what is that "Overloads" all about?
I was familiar with the optional parameters in vb 6 and it made sense given the capabilities of the language but why the heck does VB.Net support optional parameters when there is method overloading? Which one should I use and is there a difference? If there is a difference when should I use each one?
View 4 RepliesI just need to know what is the slight difference between them so I know which one to use everytime.
View 5 RepliesI have a Xml file, ( actually HTML tags ) , I want to use the SelectNodes method to get ANY node/tag containing a keyword. The node name can be anything <td> , <div> <p>. What is the XPath to get any node which contains a keyword?
View 1 RepliesUse the "new" keyword to create an object instance & Check to determine if the object is null before calling the method. I'm reading text from a text file using the following [Code]
View 9 RepliesWhat's the difference between using the in out attributes in a interop method call such as SomeWIN32APICall(<[In],Out> Byval SomeVariable as SomeType) Vs SomeWin32APICall(ByRef SomeVariable as SomeType)? When I use the latter my app crashes.Edit: Fixed Typo
View 1 RepliesI have two classes:
Public Class Subscribing
Private _subscribingObjects As IList(Of String)
Public Sub Add(ByVal obj As SubscribeObject)[code].....
Is there a more elegant way to add do this? One class would suffice, but since the Add methods have different arguments, then one really wouldn't work.
Has any body seen any OOP signatures under any MVPs or others
View 7 Repliesexplain what is the difference between IsDbnull() method and convert.isDbNull(). Can you explain how do we implement both these methods with the of examples
View 1 RepliesWhat are the behaviors difference for the Previous Property of Other1 and Other2 Class.Note than the return type of the ovrloaded Previous Property of Other2 as bean changed to Other2 while it stay as Base for Other1.
Public Class Base
Private _Previous as Base
Protected Overridable ReadOnly Property Previous As Base
[code]....
I have a question. In the framework, that was largely written before the generics came, you often see a function with lots of overloads to do something with different types. [code] and then have some kind of ifs/switch statements with typeof() to try to infer what the types are and what to do with them.What is best practise? Or what are the ideias that'd help me choose between a) and b)?
View 5 RepliesI'm trying to run this code, but it displays the error "overload resolution failed".
[code...]
Here is the full error:[code...]
[code] I dont really understand what the error-msg means. I've used this bit of code in many of my projects but this time I get this error: [code]
View 2 RepliesI'm looking for a library compatible with microsoft.net framework that allows the creation and verification of XAdES signatures (XAdES, XAdES-C, XAdES-XL, etc...).It is important that the library enable the programmer to choose:
1.- Type of certificate to use in the signature process (PFX file, Windows centralized store, SmartCard)
2.- CRL to validate the certificate.
3.- Possibility to include Time stamping on the signature.
4.- Possibility to include OCSP response on the signature.
All I found are libraries in Java, but have not found any libraries in .NET.
I created a paint type program for signatures, and now I would like to save my canvas as either a jpeg, bitmap, or gif file, but I am unsure how to go about this. Here is my code,
[Code]...
The error is:
Method 'Private Sub ProcessToolWork()'
does not have a signature compatible
with delegate 'Delegate Sub
[code].....
Im trying to figure out how to generate and verify PKCS #7 signatures in VB.net. These signatures need to be stored in a separate file to the data they are verifying (eg test.dat and test.dat.sig). Ive found code to generate signatures in another question, but cant figure out how to verify them
[Code]...
I added a table to my program and it generated two errors and not it will not build. I have added quite a few tables and this has never happened before. The reeors are:
1. public sub new ' has multiple definitions with identical signatures
2. 'Protected Overrides Sub OnCreateMainForm()' has multiple definitions with identical signatures.
I have deleted the table that I added and tried undoing everything having to do with it but nothing works.
I am assuming "No", but I cannot find conclusive proof on Google to back this assumption. Using keywords of 'vb.net "generic operator overload"' yields exactly 1 result, and removing 'overload' gives more, but no direct statement to the issue.
My thinking is given an abstract class, it'd be great to be able to implement a generic operator overload that a derived class can use in such a case when said operator overload has to return a New copy of the derived class, yet the code for each overload is the same. If that makes any sense.
This touches back to my previous questions on my custom Enum class and overloading the bitwise operators (And, Or, Not, & Xor), but, this particular thought was prompted by a mere curiosity of "Can it be done?".
Here's what one of my custom enums basically look like:
The parent, EBase is nothing special, just hosting common Name and Value properties, plus two shared operators, op_Equality and op_Inequality.
Friend NotInheritable Class EExample
Inherits EBase
Private Sub New()
[Code]....
Then (in theory anyways), calling EExample.OneA Or EExample.FiveE would work because the compiler would know to call the generic operator overload from EBase, know that EExample.Enums matches the IEnums interface constraint, and automatically supply T.
That or I'm just swimming up a certain creek here without a paddle and over-analyzing things. But it's an interesting thought, no? What is StackOverflow's consensus? Do I need to lay off the Spice a little bit?
PS: I use /* */ style comments because Markdown doesn't handle VB-style properly.
PPS: I know that, in the last example, Return New T( ... ) is invalid, but I can't think of a proper syntax that would articulate the basic idea.
I have been trying to use Subsonic 3 in a test application in order to understand how it works. However, when it builds the vb files from the database the files are full of '' has multiple definitions with identical signatures errors. I am using Visual Studio 2008 configured for VB.
View 1 Repliesi dont know what has happened to my project. it suddenly wont build and comes up with some errors regarding identical signatures. to the best of my knowledge i didnt do anything to it. i was testing some drawing stuff, but it now no longer builds on any of my back up copies either.the error list show errors at line 25 "public sub new() has multiple defs...." and line 34 "Protected overrides sub oncreatemainform() has multiple defs.
Code:
'------------------------------------------------------------------------------
' <auto-generated>
[code].....
I have a number of unrelated subs and functions that do various things on my server (e.g. Lighting control, data caching, server maintenance, etc). They are all in various classes which I have coalesced into a single solution.My goal is to create a single, simple interface which each of these disparate classes can be integrated and called from a command line interface. Instead of hard-coding a longish case statement which parses arguments and passes them to the various subs, I wanted to make a generic class which can be instantiated with a minimum of information and put into a data structure. Ideally, adding a new function would involve:
1.) Providing the function pointer (Delegate). The delegates will have various signatures. This is the crux of the question.
2.) Providing ancillary info such as the command-line callable name, number of arguments, argument types, etc.
I have a 100% working class called "node" which is basically a hierarchical tree of node instances. I can use this to simply organize function calls in related branches. All is working quite well.NodeFunctionDelegate(ByVal args As String) As String.The node takes the arguments passed to it by the command line and sends it as the "args" string as comma-separated. The delegate function then needs to know how to split up these comma-separated values, type them, tryparse them and etc. It then must return some string.It works, but it involves writing a middle-man function stub which can receive the argument string from the node class, do the parsing and type checking, and then call the destination function.My goal is to eliminate this trivial middle-man function. The problem is, I can't figure out how to create a variable-signature delegate for the node class.
Visual Basic gave me these errors:
Error1'Private Shared Sub AutoSaveSettings(sender As Object, e As System.EventArgs)' has multiple definitions with identical signatures.C:Documents and SettingsCatalinmy documentsvisual studio 2010ProjectsGame OS 0.2Game OS 0.2My
[code].....
I am having a problem setting up automated email signatures for a company through VBScript. Everything works fine apart from the rich text file creation. In this section for some reason a double underscore (__) always appears at the end of the e-mail signature when a user has their outlook set up for rich text. As you can see the script creates the signature in all the file formats needed.
On Error Resume Next
Dim qQuery, objSysInfo, objuserDim FullName, EMail, Title, PhoneNumber, MobileNumber, FaxNumber, OfficeLocation, DepartmentDim web_address, FolderLocation, HTMFileString, StreetAddress, Town, State, CompanyDim ZipCode, PostOfficeBox, UserDataPath, Maillink
Set objSysInfo = CreateObject("ADSystemInfo")objSysInfo.RefreshSchemaCacheqQuery = "LDAP://" & objSysInfo.UsernameSet objuser = GetObject(qQuery)
[code]....
I have recently come across some code that has the following. First there is a Interface with the following function Function Validate() As Boolean. That interface is then implemented in the an 'ABSTRACT' class like this.
Public MustOverride Overloads Function Validate() As Boolean Implements IBusinessEntity.Validate
Question 1: Why use Overloads in the Abstract class implementation.
Question 2: The Abstract class is then inherited into a class (TestClass). In TestClass the Validate function is implemented as follows Public Overloads Overrides Function Validate() As Boolean. I understand the Overrides keyword is to insure that this is the version of the Validate that you want called and not the Abstract class version but why again use the keyword Overloads?
From what I understand you can overload a constructor of a class by simply changing the constructor signature. Also, you overload Methods and Properties of a class by using the Keyword Overloads. But why do it when your implementing an Interface method, or an Abstract Class method that's inherited.
Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:
[Code]....
I've got question. I created this;
Public Overloads Sub AddTextLeft(ByVal Text As String, ByVal Fontsize As Decimal, ByVal Bold As Boolean)<br/>
'-- PBA / 22.08.2006<br/>
[CODE]...
