Pass Variable To External Function?
Dec 12, 2009
I have been trying to correctly pass the value of a textbox as a variable to a function that reside in my App_Code folder when triggered by a click event. I can't seem to get it right.Here is the code behind for the aspx page with the textbox and the click event:(Error is on 4th line)
Public Sub btnCouponCode_Click1(ByVal sender As Object, ByVal e As System.EventArgs, Optional ByVal CouponCode As Char) Handles btnCouponCode.Click
lblSubtotal.Text = Calculations.CalcSubTotalPrice().ToString("C")
[code]......
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Jul 21, 2010
I have Listview which databound to Dataset with about 20 items per row. I have a function which executes on each ItemTemplate appearance and gets about 10 params from Eval("something"). So basically one function builds and image from 10 parameters.Instead of passing 10 Eval("something") to the function is it possible to pass it whole row and how to use this row inside of function because it is not simple DataRow or ListView row which i can access as array of items (datacolumns).Reason i do that because function looks ugly and each time i need to change it i need to deal with dozens of items.
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Mar 3, 2012
Im having a very difficult time trying to pass an vba array ive built from ms- access vba to a .net function.I don't have a com problem I can reference the library just fine from vba but and i can call a simple function from vba. however my problem exist when i attempt to try to pass an array to the vb.net function. vb.net code
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Jul 8, 2009
I have a variable that I am trying to get to iterate up by one, i.e. X starts at 0 x+1 on first pass thererfore its at 1 then x+1 on second function call therefore x=2 and so on. I've tried the different loop and for commands but I cant get one to stay until the next function call, does it need to be a global variable? I'm sorry if this is in poor form or improperly formatted, definently trial by fire going into the object oriented world.
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Dec 18, 2009
I don't think I fully understand passing values from a sub to a module. Here is what I'm trying to do (problem is at the '****):
[Code]...
I think I've seen something like this before - where the actual function returns a value. Is this possible? Or would I have to pass an integer variable from the sub to the function, and then return it back to the sub?
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Mar 1, 2012
Im having a very difficult time trying to pass an vba array ive built from access vba to a .net function. I dont have a com problem I can reference the library just fine from vba but and i can call a simple function from vba. however my problem exist when i attempt to try to pass an array to the vb.net function. vb.net code
<ComClass(ComClass1.ClassId, ComClass1.InterfaceId, ComClass1.EventsId)> _
Public Class ComClass1
Public otag As String()
[code].....
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Feb 2, 2012
I have a structure to hold a student name, an array to hold 5 test scores, and an average score. I have created an a array of structures for 6 students. User input is setup through text boxes. I want to calculate the average for each student. I have made a function to do this. What I am having trouble with is how to pass the array of test scores to the function.
Here is what I have so far:
CODE********
Public Const intMAX_STUDENTS As Integer = 6
Public Const intMAX_NUMTESTS As Integer = 5
Public student(intMAX_STUDENTS - 1) As StudentData
[Code].....
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Jun 5, 2012
I am using XML literals to parse files that contain data. I was wondering if there is a way to take a section of the xml file and pass it as a variable to another function...
<XML>
<DATA>
<STUFF>
<blahblah>sdfsdf</blahblah>
[code].....
I know with XML literals I can use ...<STUFF> and get the info out of that section, but how can I take an entire section of the xml, like MORESTUFF and set it as a variable to pass to another function that can parse that xml?
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Dec 22, 2009
I have a function that returns a date. I want to use a modal window to get the datte value from the user and pass it into the function.
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May 23, 2012
I have created 2 forms (Parent & Child), i want to store the unique textbox value to a variable into the parent form.
[Code]...
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Oct 12, 2011
I 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.
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Sep 5, 2010
Using Visual Basic 2008 Express. I need to pass a variable to another form. Or else make the variable visible to both forms.
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May 28, 2012
I want to make a GetAllContacts method which takes a sort parameter of type Func(Of Contact, TKey) which is the same type that the OrderBy method for an IEnumerable(Of Contact) takes.[code]"Too many arguments to extension method 'Public Function ElementAtOrDefault(index As Integer) As Contact' defined in 'System.Linq.Enumerable'." on the second parameter.
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Mar 30, 2012
Im a student doing an assignment, how do i pass the value from a sub procedure to a function procedure....i want to pass the value from decSubtotal to a function procedure named CalculateDiscount; check out my code--
[Code]...
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May 18, 2012
Public Class Form1
Dim x, c, number(0 To 19) As Integer
Dim s As Integer
[CODE]...
The variables in the brackets [example] do not actually have brackets in them in the original code. These are where the issues are. For both variables, it says, "The type for variable [variable] will not be inferred because it is bound to a field in an enclosing scope. Either change the name of [variable], or use the fully qualified name (for example, 'Me.[variable]' or 'MyBase.[variable]')." Now, I'm not entirely sure if this is a stupid question or not, as I'm used to VB '98 because that's what we use in my programming class at High School. let me know why this won't work.
-Note: The intention of this program is to continually loop the generation of numbers for this list until I tell it to stop. Button1 ends the program, Button2 generates the list one time only, Button3 is supposed to loop the generation of the list, and Button4 is supposed to end the loop, but not the program.
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Oct 9, 2009
wondering if there was anyway I could call a function of an external program. Ie.My App:Call Reset()External App:Reset()My.Settings.Rese
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Mar 21, 2012
In my application I'm trying to invoke a function from an external DLL (this DLL is compiled in C++)I have this code to declare the DLL function:
Code:
<DllImport("{DLLPATH}", CharSet:=CharSet.Auto, SetLastError:=True)> _
Public Shared Function functionName(<MarshalAs(UnmanagedType.VBByRefStr)> ByRef Name1 As
[code]....
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May 12, 2011
I'm using a 3rd party DLL to access a proprietary Database. It's designed to invoke a function called "CALL_ME_FUNCTION" to make the datarows available to my program. What makes it difficult is the CALL_ME_FUNCTION is in the VB program and therefor, external to the DLL iteself. I've got the CALL_ME_FUNCTION written in my program, but how do you give access of it to the DLL? I've written lots of code that invokes functions inside a external DLL, but this is the first time I've encountered a DLL that needs to run a VB function.
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Sep 17, 2011
I have the following code that I am using to parse out a test file. I am getting variable conversion error in Sub Main() when I assign file = Read(). The return value of Read() is a TextFieldParser type. How do I assign the proper variable type to "file" so I can write the output to a text file?
Function Read()
Using MyReader As New FileIO.TextFieldParser("C:UsersColinDesktopParse_Me.txt")
Dim currentRow As String
[Code].....
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Feb 17, 2011
I'm currently working with a client's VB.Net code, which was developed for them by a small development shop a few years ago and which they purchased and have been maintaining and uprgrading since. This client's primary developer is out on indefinite (likely permanent) medical leave and I'm now filling in until they bring in a full timer (as I'm a contractor here). My current task is to add some functionality to a the VB.Net code they purchased. I'm finding practices and techniques in the code that absolutely baffle me and can't make the code do what I want. I'm starting to wonder if it's me and was hoping to get some thoughts on the code I've encountered.
For example: Setting a variable to accept the result of a function by calling the function with many parameters, clearing the parameters in the function, setting them to some value, calling another function with those new values, then never using the values returned by the functions. I'll add a code snippet in the first comment since this is already getting long.
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Nov 8, 2010
I have a function in an external library, for which I do not have the source code, which is causing problems. If I were putting in a breakpoint in my own code, I would put it on the first line of the function, but as it is an external function, I do not have that option. Is there any way to as Visual Studio to break any time the function is called? My current workaround is to do a "Find All References" and put an individual breakpoint on every single call to the function, which is a sucky way of doing things.
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Dec 7, 2011
Part of my project is to retrieve a string variable from an external source (google docs) and parse it. This string represents width and height. I have no problem retrieving, I just need to parse it in to two strings. The string has 4 variations.
Here are examples:
3"x4"
3"hx4"w
3hx4w
3x4
The width is always the first number and the height is always the second. Sometimes, the width and height have decimal points. Any way to parse this into two strings of the numeric values only?
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Apr 20, 2012
I have a Javascript function in the js file (test.js) and I need to call her in visual basic 2010 enter her input parameter and load response javascript functions in visual basic.
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May 25, 2012
I have an application (app.exe) that has a VB Module in its source code (Module1). The module has a function called Function1. I need to call this function from another application. The module is not marked as public, so adding a reference to app.exe won't work. I'm trying to use reflection (Assembly.LoadFrom()) but unless I'm way off base, the module would have to be a class in order for me to get an instance of it.
Please nobody ask me "what have you tried?" I tried a million different things and let's just say "none of them work." So I'm looking for someone that has specific experience with doing exactly what I'm trying to do. If you don't have that experience, please move on to the next question and ignore mine.
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Jun 1, 2009
I notice in the MSDN documentation that there are multiple ways to declare a reference to a function in an external DLL from within a VB.NET program. The confusing thing is that MSDN claims that you can only use the DllImportAttribute class with Shared Function prototypes "in rare cases", but I couldn't find the explanation for this statement, while you can simply use the Declare keyword instead.
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Jul 8, 2009
ok to start i know very little about VB6 but i am very good in true basic lol (stupid school teaching the wrong language -_-) anyway im just asking you to make the answer as clear as possible because i don't know very much. heres the problem . ok in the above example i have a button that (for my example) can be used to build a house (lol) i then have a variable in the button sub called money which will have 150 subtracted from it when the button is clicked my problem is it say variable not defined when using this button ... i have declared the variable in a module and in form load along with my other 50 or so variables. my question is how do i pass the variable into this sub and then send the new value back into form load so it can be sent into another sub for more calculations.
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Jan 14, 2010
I currently have the following funcion:
Public Sub GetUserAmount(ByVal ConnectionString As String)
Dim command1Text As String = "SELECT Wager FROM Donations1 WHERE DonationId = (SELECTCOUNT (BidCountHistory) FROM BidCountHistory)"
[Code]......
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Aug 6, 2011
I need to pass a variable by name like this
Dim html_news = "...the news ..."
Dim var = "news"
Dim a = "html_" & var
' content of that variable
How can I do that in VB.NET ?
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Sep 7, 2011
I am currently trying to teach myself how to program VB.Net in Visual Basic 2010 Express.I've been working on a little project for a while and have hit a wall. Normally I can find what I need online but I am now at a complete loss. Essentially I am trying to pass a pair of variables from Visual Basic (file names actually) to VBA so that I can copy/paste data from them using VBA. What I need is to find out how I can pass variables (in string form) back and forth between VB and VBA
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Oct 1, 2011
I have a Public Sub where I declared
Dim Elev As Double
later under that Sub I have the program go to anothrer SubRoutine that uses the same Elev variable. Within that subroutine I get a Variable not declared error. My book talks about using "Static" but in the context i guess I am using it, it hasn't worked.
What is the best method of tranfering the information from one sub to another.
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