Pass Parameters Of LINQ DataTables Through Functions And Subs?
Oct 30, 2011How do I pass parameters of LINQ DataTables through Functions and Subs
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VS 2008 Subs/Functions Intellisense Listing Values To Parameters Upon Using It
May 30, 2010I'm almost sure that I've seen this somewhere, but I can't find it anymore. Or maybe I'm imagining it, which would'nt be strange either.
When creating a sub or function and adding parameters used when calling it.
-Is it possible to list the parameters that I can enter when using it somewhere in my code?
E.g.
Public Sub MessageMain(ByVal Message As String, ByVal MessageType As String (List of possible values for MessageType)) Same for example as when you have boolean values in a sub/function. As soon as you use that somewhere in your code intellisense will present you with True/False to select.
I'd like the same for parameters in subs or functions I create and calling them from somewhere in my code. Saves me the trouble of remembering which options are available for those parameters.
VS 2010 Add Subs / Functions To Subs / Functions?
Oct 26, 2009When you refrence a Function like this one:[code]You may want to be able to get more out of that, like this.[code]So how would I be able to add subs or functions onto a sub or function like that?
View 4 RepliesDatatables Left Join Linq - Joining 2 Datatables And Have The Joined Datatable As Result
Jun 1, 2012I'm having a hard time joining 2 datatables and have the joined datatable as result. First datatable (labels) holds data including a printerid. Second datatable (printers) holds printer references (id > unc). I would like to have as endresult (joined) a datatable with all data from the first datatable with the field (unc) of the second datatable. [Code]
View 3 RepliesUse Functions And Subs?
Feb 21, 2010I was reading the lesson on how to use functions and subs and I'm having a bit of a hard time understanding this part:
[Code]...
Insert Subs And Functions Into Vb?
Jun 14, 2009I don't mean to sound unintelligent, but is there a way to insert your functions and subs into visual basic and call them from and program made in visual basic? I don't want to have to put the code in over and over again.
View 8 RepliesShared Functions And Subs?
May 21, 2009I was wondering how to implement a vb script file with functions and subs that can be used in all code pages of a project. Similar to the old VB 6 bas files.
View 2 RepliesSum Of N Numbers Using Subs And Functions
Apr 7, 2009Option Explicit On
Option Strict On
Public Class frmMain
Private Sub btnSub_Click(ByVal sender As Object, _
ByVal e As EventArgs) Handles btnSub.Click
Call CalcSumSub(CLng(txtN.Text))
[Code] .....
I'm not receiving any errors or any thing I just need figuring out the logic in this program. The Program Needs to Accept Input in One text box and adds n numbers together and displays the sum using only subroutines and Functions.
Attached File(s)
Assignment5.txt (4.49K)
Number of downloads: 84
Getting Progress Bar To Follow Subs And Functions?
Jun 2, 2011Earlier I was working on a project, and I added a StatusToolStrip and the the ToolStrip I added a label and a progress bar. The label will say the current sub or function that is in progress and the progress bar will show how far along it is through the sub or function. I have tried this myself but I cannot figure it out as I rarely use progress bars.
An example of a code that I would like the progress bar to show would be like this:
Private Sub StopServer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles StopServer.Click
'Checks to give server notice
If My.Settings.warningmessages = True Then
Dim cmd As String = My.Settings.warningmessagetext(2)
[Code] .....
So while the sub is running the label would say "Stopping Server" and the progress bar would show how far along the sub is.
Should All Subs & Functions Always Be Inside A Class
Oct 4, 2008This is very basic about the layout of classes, subs etc. 1. Should all my subs & functions always be inside a class? I haven't used classes too much before, mostly just a bunch of subs in a form file. Now I downloaded a sample program which I want to develop. This has all the code of the form inside "Public Class Form1": [Code] The code is an example of use of the ZedGraph library. It produce a simple window with one graph/chart. Now I want to develop this code with several tabs, a dusin different charts, file I/O and so on. I'm ok with most of the specific coding, but my question is on the general coding;
2. Should I continue my subs&functions inside this form? inside this class? inside a new class? Earlier when I've NOT been using class, I can make global variables by placing the "Dim" outside the subs. This does not seem to work within a class. 3. Should I avoid global variables all together, or how is this done without always passing arguments?
Also I will make more forms, for program options etc. 4. Should these forms be coded as classes? or just subs&functions in a form? Obviously I'm not well trained on the proper use of classes and have trouble to find this easily explained.
Create A .dll In VB Express With Multiple Functions And Subs?
Apr 15, 2010I'm trying to create a .dll in VB Express with multiple functions and subs.
For the .dll program, I create a class module with:
Public Class Class1
Public Function ReturnOne(ByRef MyVar As Integer) As Integer
[Code]....
Upon execution, it tells me that it cannot find the entry point in the .dll.
Declare Some Global Variables For Use In Various Subs/functions?
Oct 21, 2011At the head of a module, I wish to declare some global variables for use in various subs/functions.
What is the difference between.Dim x as string and Private x as string / Public x as string, and when would I use one over the other?
Keeping All Functions And Subs In Separate File?
Mar 4, 2009When I code in PHP I usually keep my functions in a separate file functions.php, I am going to write a small function in VB, is it ok to keep all my functions and subs in the 1 file linke in PHP? will they be available in all my form code?
View 3 RepliesVS 2010 - Referencing Shared Functions And Subs
Feb 1, 2011I am porting an app from VB6 and I run into problems with references to functions and subs. Basically, let's say I have 2 classes added to the project, like this.
Public Class OOOOO
Public Shared Sub BBBBBBB(ByVal FileName As String)
...
Call CCCCCC()
Call DDDDDD()
etc.
...
End Sub
[Code] .....
I had to make the BBBB() shared to be able to call it from another function AAAAAA() from another class PPPPP. However, I get error on the references in the BBBBB(), that CCCC() and DDDD() have to be made also shared (so instead of 1 error I got number of errors).
When I tried to make them shared as well, I got tens and tens of errors due to other references of both variables and functions.
Passing Subs And Functions With Varying Signatures Into A Class
Dec 28, 2011I 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.
Multithreading Efficiency (Reuse Background Worker Subs / Functions?)
Oct 3, 2011I have an application that queries DHCP and pulls scope/subnet information. There are roughly 8k scopes on our network to query so reporting this data takes a little bit of time. I currently have this running on it's own thread and reporting to a progress bar so the applications doesn't seem inactive.
The DHCP api functions can report a total, a max read and a resume argument. This means that I can, in theory start 4 threads and have each thread read through 2k subnets, so it will only take 1/4 of the time to read all this data. Would I need to create four separate background worker handlers, do_works, runworkcomplete, report progress etc.?
VS 2008 - Difference Between Public, Private, Protected When Declaring Functions And Subs?
Jul 19, 2009i have have a few questions about the syntax of the lan.:
1) What is the 'Get' statement and when do you use it?
2) Whats the difference between public, private, protected etc... when declaring functions and subs.
3) When would you use the overrides property?
VS 2008 Pass An Array Between Private Subs?
Sep 4, 2009I want to use a string array created in a different private sub in another, so I need to pass the array. How do I accomplish this task?
View 2 RepliesVS 2008 Class Library - Declare New Instance Of MainClass() Before Using Subs/Functions In Class2 Or Class3?
Feb 3, 2011Namespace MyClassLib
Public Class MainClass
Public Sub New()
[CODE]...
Is it possible to make it so that the user using the Class Library has to declare a new Instance of MainClass() before using Subs/Functions in Class2 or Class3?
VS 2005 : Make Program To Select A File, Create DataTables And Then Perform Some Other Functions?
Feb 9, 2011I am attempting to have my program select a file, create DataTables and then perform some other functions. I want to be able to open another file and re-do the same steps.The problem I am having is that I add columns to my Datatables and when I try and to open another file while one is already open I get a message that a column of xyz is already added how do I properly "clear my datatable" or perhaps that isnt even the correct approach? Here is the code I have that Opens a File
HTML
Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click
[code]....
This was working at one time but after adding to my project I must have placed something in the wrong place inadvertantly or it has soemthing to do with adding columns,?
Combining DataTables Using Linq
Apr 27, 2012I've seen several posts on the subject, but none seem to answer this particular dilemma. I have two datatables that I obtained by querying two separate servers.[code]
View 7 RepliesUse LINQ To Left Join 2 Datatables?
Nov 10, 2011I have two UNTYPED datatables: "Shelfs" and "Books". Data came from different databases.
I must create a "left join" relationship because I want a list of ALL shelfs and books (if they have any).
Dim dset As New DataSet
dset.Tables.Add(dtShelfs)
dset.Tables.Add(dtBooks)
[Code].....
I spent hours googling around, but all examples I found were only applicable to strongly typed dataSets, and how to build queries (not to get the data)
I could solve this the "easy" way: by looping both datatables and sending the rows to a third one, but I want to do this the "right" way and, of course... LINQ exists to make things easier and I don't know how to use it
Join Multiple Datatables Using LINQ To Dataset?
Feb 8, 2012I have been searching for quite a while about joining multiple datatables via LINQ to dataset (When i say multiple, i don't mean just 2!!!), and it seems there aren't lot of examples in the net. I have seen examples of joining two datatables, done that, no problem there. Now i want to join three datatables. And there's nothing i can find out there.For example i have a 3 datatables:
PERSON (columns: person_id, name, gender_code, ethnic_code)
GENDER (columns: gender_code, gender_description)
ETHNICITY (cols: ethnic_code, ethnic_description)
[code].....
VS 2008 Replicate This Code (LINQ, Datatables And N-tier)?
Apr 4, 2012I am referencing a project so I can create a messaging system on my website. [URL] how I would replicate this function in my dal and bll so that I can get the same output. In the example they use a datacontext. I mostly return datatables in frim my DAL.
public List<MessageWithRecipient> GetMessagesByAccountID(Int32 AccountID, Int32 PageNumber, MessageFolders Folder)
{
List<MessageWithRecipient> result = new List<MessageWithRecipient>();
using(FisharooDataContext dc = conn.GetContext())
[code]....
Make A Root User Interface That "calls" The Functions And Subs Remotely?
May 25, 2010I have an application that I am reworking. It has many reports and a pain to compile and roll out.I'd like to make a root user interface that "calls" the functions and subs remotely.I was concidering pulling them and making formless exe's of them, passing the needed criteria via command line. Yet still be able to update and control them.
View 4 RepliesGet Functions Name And Their Parameters?
Dec 13, 2010We know some functions in dll files and can use them but if we haw a dll file and dont know functions names. is there a way to get the functions name and their parameters
View 3 RepliesVS 2010 Calling Subs And Functions Within Classes That Are Within Classes?
Oct 24, 2009Here 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]....
Create A LINQ Query Statement That Retrieve Intersecting Data From 3 Datatables
Nov 26, 2010I am trying to create a LINQ query statement that retrieve intersecting data from 3 datatables (dt, dt1, dt2). My first attempt to do so with the following LINQ query statement was successful: [code] However in my design, I would need the LINQ query statement to be dynamically generated, because I want a user to be able to retrieve intersecting data entries from VARIABLE number of datatables. In this case, the first option is not as good as the "INTERSECT" query operator, with which I can just easily connect each SQL query statement with a "INTERSECT" operator. The problem is that my second attempt using the "intersect" operator fails, and after many trials and errors I still can't get it to work. [code]
View 5 RepliesAdd Description To Functions And Function Parameters?
Apr 19, 2011I'm writing a VB.NET function with a ton of overloads. I've seen that most .NET functions have parameter descriptions in IntelliSense. For example, when typing in String.Compare(, IntelliSense says Compares two specified System.String objects and returns... you get the idea. This description changes and you click through different overloaded versions of the same functions. When you start typing in something for a parameter, it describes the parameter you're currently inputting as well. Example: strA: The first string to compare..
View 5 RepliesArray Parameters In Functions/procedures?
Feb 1, 2011I do need to write a procedure that carries an array as a parameter- The array can be an array of many types (Dates, Double, Strings etc)- The number of elements in the array is unknownExample:Private Sub MyArrayRoutine(MyFirstPatameter as string, MyArray as array of Object()
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