I have the following equation. It's a log function or the ln, which I think is called the natural log function.I want to compute the value of x using my vb program. How do I write this function in visual basic?
y = 19.322ln(x) - 8.5994
How do I write the ln(x) function in general?
I have Ln in my function that I write in excel but in vb it doesn't work
0.215*Ln(4.32/0.3)
it should return the value = 0.573
how can I write this function without using log function (I don't know logs functions)
i need code to write a function DeleteIfExist(StrFileName)
View 4 RepliesI have a bit of a problem with the following bit of code. Basically the last line (Return Write...) is giving me the error 'Expression does not produce a value'.[code]...
View 1 RepliesSay I have some text like this: blah blah
this is my text and I like it,some more text here .I am trying to write a function that would get a string of text like that and put it into a single line. I've tried string.replace(vbcrlf, ""), but that doesn't get rid of all the line breaks. Can someone help me out here?
I'm trying to write a function where if the number in the first textbox is greater than the number in the second textbox.the result shows that it is "True", otherwise, it will show "False."
This is what I have so far:
[Code]...
What am I suppose to put in the Button coding? Or is what I have wrong? I don't know.
I like to turn Option Strict On I cant figure out how to write the generic version of this function?
Public
Shared
Sub UpdateItem(ByRef
oldValue As
[code]....
I need to write a function to select a text file.also let me know if i need to add any thing from references or from components window.is file browser and folder browser the same?
View 2 RepliesI don't understand the AND function.
I'm trying to say:
CODE:
It all works, except for the AND part. And I don't wanna write out a bunch of if statements just for this one thing.
I want to write a function that select some of xml nodes from a xml file that xml file has a attribute is date 20/06/2011 12:00:00 PM if i want to select all the node that is before 20/06/2011.i know sql query has >>> date LIKE "20/06/2011%" does xpath or .net has kind of method
View 3 RepliesWrite a function to print the Fibonacci value at a given position in the series.you should write two versions of the function both of wich must be named Fibonacci(overload functions).the first version should be implemented using a for loop.the second version should be implemented using do until.
View 3 RepliesHow to write Case Sensitive Function In SQL Query?
View 3 RepliesI am looking to write a small application that will mount an image using imagex and show a progress bar as to how much of the image has been mounted.
View 2 RepliesI'm a beginner and doing a review for my final...the question is-Write a Function procedure that takes an array of Strings, sorts it using Shell sort and returns the sorted array. I do not get shell sort at all.
View 3 RepliesI am trying to return a javascript function using response.write in an aspx page. The problem is that the function i am returning has lots of quotes and they are conflicting with the repsonse.write syntax. Here is a sample code:
Response.Write(" If hello.StartsWith("H", StringComparison.InvariantCultureIgnoreCase) OrElse hello.StartsWith("W", System.StringComparison.InvariantCultureIgnoreCase) Then")
This is giving me a problem as the quotes inside are cutting off the response early. Is there a better way to do this?
How to use function WriteAllBytes, to write to the end of code of previous program, so it wouldn't overwrite it?
View 1 RepliesI know how to declare a variable, a function, to write a string of characters or numbers (I still looking in tutorials and depict from there what i need to know) but...WHAT I DONT KNOW is how to USE them? At "what" or "how" are you thinking when you make a program? I try for SOME LOooNG TIME to understand but I think im too stupid to understand from pages on the net (or i dont find THAT tutorial who can explain right for me).I try a lot of programing languages starting with pascal,c,c++,darkbasic,alice, Visual-c,c#,c++,basic,php,even assembler, some programing zones in Excel and Word but from all of this i cant manage to understand the life behind the words.
View 1 RepliesI have a camera for which the complete source code with header files(.h) and all libraries files(.lib) are given in VC++. Now if I want to access the function calls in the header files and in turn the functions in the library from VB.NET, I am required to write a wrapper DLL for accessing the function calls which I never did till now.
View 1 RepliesSuppose I want to write a function like the following (as usual, a trivial example for illustrative purposes):
Public Function calcSqSum(Of T)(ByVal list As IEnumerable(Of T)) As T
Dim sumSq As T
For Each item As T In list
[Code]....
As you can probably guess, this function causes an error because a generic object is not guaranteed to implement the + operator. As far as I know, though, any numerical type (Integer, Double, Decimal, etc.) will.
Is there a way to write a (quasi-)generic function that can accept any numerical type, without having to explicitly overload the function for every such type yourself?
Alternatively, I suppose an equally acceptable solution would be to somehow check if a type implements the '+' operator (or any operator generally associated with numerical types and used by the function).
I'm looking to write a function that is called everytime an exit button is pressed, just simply prompting the user to click yes or no is there a guide anywhere? is there a name for this kind of thing i can look at it more?
View 7 RepliesWrite a function that returns the number of duplicates that exist in an array.
View 2 RepliesI 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].....
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.
I'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]...
I have a trouble making this code work. When executed, it just creates a correct (with the correct name) file with the extension .txt but the the actual text inside .
Imports System.IO
Public Class Form1
Public mytext As String
[code]...
The strange thing is that while debugging, h, t string variables have the correct values, but somehow mystream.write(t) doesnt work (it doesent write anything to my h.txt text file...
Ok i saw this guy on youtube that made a achievement generator for his computer. For example, he goes to notepad and write something and saves it and gets the xbox 360 achievement pop up saying "Gotta write this down" and all that. Cud this have been coded thru VB.NET or something?
View 1 Repliesi have a notification j-query plugin .. i taste it in my page (working 100%)but when i want to use it in a event SqlDataSource1_Deleted with the response.write method it does not work
Protected Sub SqlDataSource1_Deleted(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceStatusEventArgs) Handles SqlDataSource1.Deleted
Response.Write("<script type='text/javascript'> showNotification({message: 'This is a
[code].....
I 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.
i wanted to ask how to make picturebox1 ,to which functions are already assigned, perform the same function as picturebox2 ,to which no functions are assigned.For example:I have already made picturebox1 and have assigned it alot of function like when play button is pressed then picturebox1.visible = true and when we press pause button picturebox1.visible = false. So now i decided to make a theme and have to remove the picturebox1 and want to allow the picturebox2 to havefunction of picturebox1.But when i disable the theme the function of picturebox1 should go back to picturebox1.
View 6 RepliesI want to write a program to write in an xml file in this format:
<?xml version="1.0" encoding="utf-8" ?>
- <Orders>
<Item id="1" SKU="998123" Description="Super Widget" Quantity="100" />
[Code]....
