Use A Function / Sub That Exist In Modul?
Feb 8, 2009I new in vb.net and i try to call a function that exist in a module[code]...
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MDI - Childforms - Application - User Can Choose Which Modul He Wants To Use
Oct 4, 2010Here is a simplified hierarchy of a application I want to create:
1. Mainform - here should be a navigation pane, where a user can choose which modul he wants to use.
2. Childform Reports, Childform Maintenance, Childform To Do, Childform Management, ... - depending on which modul of the program the user wants to work with, a proper childform will appear as the main working part of the application
3. Childform CostReport, Childform TurnoverReport, Childform EmployeesReport, ... - if user wants to work with Childform Reports (chosen in 2. paragraph) he can work with one of these childforms.
I wanted to do this with MDI childforms, but visual basic keeps telling me that a form can be a MDI container only as a toplevel, which Childform Reports isn't. So i can make the program till 2nd paragraph but when i want to make the 3rd, its a problem.
I put the error here: "Top-level style of a parented control cannot be changed.
Parameter name: value"
Is there a workaround?
Maybe i could use TabControl for the 3rd paragraph, but its not that convient, since I want to use more "tabs" or forms...
Check If A Function Exist In A Class In Vba
Oct 21, 2009the way i could use VBA to check if a function say function1 is present in class1. if the function is present display 1 else display 0.
View 2 RepliesWrite A Function That Returns The Number Of Duplicates That Exist In An Array
May 18, 2009Write a function that returns the number of duplicates that exist in an array.
View 2 RepliesCreate An Application Autoupdate - Check In A Webserver If Exist New Version,if Exist The Software Run Update
Dec 21, 2010I try to find online any example for create an application autoupdate.
When I run my application it check in a webserver if exist new version,if exist the software run update.
Namespace Of "system.runtime.caching" Does Not Exist But In Object Explorer And Microsof Exist?
Nov 25, 2010namespace of "system.runtime.caching" does not exist but in object explorer and microsof exist.i use microsoft visual studio 2010 and .net framework 4.0.i also cant use this name space(System.IO.MemoryMappedFiles & System.Runtime.Caching.MemoryCache)
any body know what is the problem. i want my program after doing something (opening a file or any thing that can do something my program use more memory.)use memory like startup run.
Rich Text Box That Does Not Exist Yet In A Tab That Does Not Exist?
Jan 16, 2011Here's my code:
Option Infer Off
Option Explicit On
Option Strict On
Public Class Form1
Public Sub NewToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripMenuItem.Click
[Code]...
Button That Determine If File Exist And If That File Exist Then Show A Messagebox?
Sep 16, 2009I have Requests for VB(2005) very very important for my selly project!i need a button that determine if file exist and if that file exist then show a messagebox!and if not show messagebox!.
View 2 RepliesCode To Check Database Exist In SQL And Message Box Show Database Exist Yes/NO?
Apr 23, 2012I want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?
View 1 RepliesWill The "New" Bit Only Be Executed Once When The Function Is First Executed But In The Next Call, It Will Already Exist
Sep 27, 2009I used to write this:
Private Sub Example()
Static CachedPeople As List(Of MyApp.Person)
If CachedPeople Is Nothing Then
[code]....
But then wondered if I could reduce this to:
Private Sub Example()
Static CachedPeople As New List(Of MyApp.Person)
...rest of code...
End Sub
will the "New" bit only be executed once when the function is first executed but in the next call, it will already exist.
How To Pass A Function To A Function Is Functors/function Objects Avaiable In VB2010
Oct 12, 2011I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?
I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)
What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.
I have just started using VB, and from what I have found so far it seems like the tools you have is
- to us a delegate for the function
- to use a lambda expression for the function
- send a pointer/adressOf
- to create a function class/structure and submit this to the function
As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.
Function Syntax - Call A Function With 2 Arguments When The Function Is Only Defined For One
Apr 1, 2010I'm trying to undersatnd the syntax of calling a funciton and it seem confusing when I'm using a web service in ASP.net. Maybe this question should be in an ASP forum, but it is a VB question. This simple web service allows you to type in your name and it response with an alert box with you name.
My question is, How can you call a function with 2 arguments when the function is only defined for one. I understand that the second argument is actually a method that handling the respons, but how can you interchange function arguments for methods and how do you know that there are methods for
Here's my call:
<script type="text/javascript">
function HelloWorld()
{
var yourName = $get('txtYourName').value;
[CODE]...
How To Check The Exist Value
Jan 17, 2009Using VB.Net and Sql Server I want to check the user Entry Value.The User is entering the code in the textbox, before saving to the table, i want to check whethere code is already exist in the table or not.
Tried Code
cmd = New SqlCommand("Select code from table where code = '" & textbox1.Text & "' ", Con)
dr = cmd.ExecuteReader()
While dr.Read()
End While
If value is exist, then message to the user "Already Exist" other wise save to the table.
Id Number Already Exist
Jan 15, 2012i am new to VB.net. just want to check an id number in my textbox if its aldready existed in my database. this is my condition: if textbox1.text = ds.tables("employees").row(0).item("id") then msgbox("ID already exist") end if
View 9 RepliesKnow Value Exist In Database?
Aug 8, 2011[code]...
If the code exist in the table only it shows the description
Says File Does Not Exist When It Does?
Jun 11, 2011I feel quite silly posting this as I know my way around C++ decently and am writing an application in VB however I am getting quite frustrated with this problem.
Dim FileNo As Integer
FileNo = FreeFile()
Dim FILE_NAME As String = "C: est.txt"
[Code].....
When executing the above code it says at the FileOpen operation that the document does not exist or the relative path may not be right... I have looked in many place over the internet and even used the same examples from the Microsoft website however I get the same error.
Tell If Something Doesn't Exist?
Jul 16, 2010I want the oppisite of
If My.Computer.FileSystem.FileExists() Then
end if
VS 2010 : Convert A DLL Function Call Which Has The Callback Function Routine Called Within The DLL Function Call?
May 25, 2012I am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:
typedef void *HANDLE;
typedef HANDLE HACQDESC;
DECLARE_HANDLE (HWND);
[code]....
how to convert this DLL call to VB.NET and also how to create the callback function and send it as parameter to this function
call.
.net - Get XmlItem.Value Even If Element Does Not Exist?
Mar 19, 2011I am starting out with xml and vb.net here, my xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<Steps>
<X cmd="Message">
<Message>Hello World</Message>
[code]....
it works if all the elements are found (< Message > and < Title >).. but if for example the element "< Title >" is not found I get an error by trying to get the innerText.Is there a way to ignore these errors, I just want to receive an empty value and not any errors.
.net - IO.FileNotFoundException But File Should Exist?
Aug 4, 2011I'm getting a suprising FileNotFoundException although i'm sure that the file exists.I simply wanted to add Logfiles(IO.FileInfo) as attachments to an email, therefore i tried to check the length of every file to detect if they must be added/zipped.This works fine if these files already exist. But if i've created them in this run, i get above exception when i try to check the length. It's oddly enough that i can write into these "not existing" files(actually FileInfo.Exists returns false) without a problem one line before.
Here is some code...
Creating one of the files in the constructor of a class named Log:
Me.LogFile = New IO.FileInfo(infoLogPath)
If Not LogFile.Exists() Then
'tried to use `Using` on the Stream but that doesn't change anything'
[code]....
Can Access Variables That Don't Exist Yet
Feb 1, 2012Basically I just want to use
tile1.backcolor = colors.while (just an example)
however tile1 is only created WHEN the form loads, and it will not let me compile it becuase it's saying it doesn't exist
Check If ANY Folders Exist?
Nov 17, 2009I want to check inside a dir if any folder exists. Every way I found is to check for a specific folder with name as string. I want something like
folderExists = My.Computer.FileSystem.DirectoryExists("C:TestDirectory*")
Check If File Exist On The Web?
Jun 21, 2007how do i verify a file like a image or html exist on the web?
View 6 RepliesCheck If Ftp Directories Exist?
Nov 18, 2009i am having a problem in writing the code that checks whether a directory exists or not in FTP using vb.net..
View 3 RepliesCheck Regedit If Key Exist?
Jun 21, 2010I had it working at one point now it does not want to work. Im checking the registry for a subkey and I know it exists but vb is telling me it doesnt, which is driving me up the wall, this is what I got[code]...
View 1 RepliesChecking Record Already Exist Or Not?
Jun 4, 2011My tables are PURCHASE and SALES...In PURCHASE table, fields are CODE(primary key), PRICE, DATE, TOTAL, QTY...when I'm entering datas in form and when i click submit, the datas stored... but when i enter same DATA(CODE), it is showing error...i don't want to show the DEFAULT ERROR message...so, i want to search whether the CODE is already in database or not...i.e When i click SUBMIT button, 1st it has to search whether the CODE is already PRESENT in table or not. if it is not there, DATAS have to be stored. otherwise, it has to DISPLAY MESSAGE BOX.
View 4 RepliesDB/Reporting :: Does EOF Exist In 2008
Apr 30, 2008I am trying to change over a program from VB 6.0 to VB 2008 and I am having trouble with the EOF statement. [code] Argument not specified for parameter 'FileNumber' of 'Public Function EOF(FileNumber As Integer) As Boolean'.I have a Dataset with a Table called Table1. How do I get VB 2008 to perform the "Do While Not Table1BindingSource.EOF statement?
View 1 RepliesDisplay All From One Table Even If It Does Not Exist In The Other
Nov 15, 2011I have two DBF tables called product and ullage. The user enters data from products table into ullage, by searching for product id and adds their count into the ullage table. This part is working. how can I display the products table with all the prod_ID, Desc and price with Counts from the ullage table but were there is no count in the ullage table these product will be displayed but with no count number.
The Tables....
Product table
Prod_ID | Desc |price
1 Food 5.99
[Code].....
Dll And Ocx Files Does Not Exist In Program
May 1, 2009I am just trying to learn Visual Basic in 2008. I need some help theory about dll and ocx files. I have seen videos tutorials, and in some of them they use some additional files. i.e. MSwinSck.dll, or DVD .dll ect. But lot of these files does not exist in my program, noone is telling about these files and where to install them or how to get them.
[Code]...
How To Check If The Data Exist
Sep 8, 2009This code works. i insert 3 string and then check if the database already save this code.if the first string does not exist it works well.but when 1 string "already exist" or found in the DB, all of the next string say its already in db even though it haven't. what should i do?
For count = 0 To strArr.Length - 1
If strArr(count).Contains("=") Then
str1 = strArr(count)
coun = str1.IndexOf("=")
str1 = str1.Substring(0, coun)
[Code]...