I am having trouble figuring out how to get my function (lines 45-57) to work. Option Strict is supposed to be on. I am getting the error "Option Strict On disallows implicit conversions from 'Decimal' to 'String'." This is an intro problem so its going to be basic. [code]
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I have a C# function call which looks something like this:
var res = function ("arg1", // argument# 1
"arg2", // argument# 2
"arg3" // argument# 3
[code].....
The following works:
[Code]...
However, the following doesn't work:
I expected the "Left" function in the code below to return the letter "A" but it returns nothing? Also, as a further test, Left(CP, 3) returns nothing?
View 3 RepliesI have the following function written for dot net 3.5 that uses "ElementAt()" to successively return a value from a dictionary collection.
Public Function GetNextEntryInfo() As EntryInfo
If mFileInfo.Count > mIndexLoc Then
Dim entry As EntryInfo = mFileInfo.ElementAt(mIndexLoc).Value
[Code].....
Basically, I'm trying to do some string manipulation to edit directories. I found some code to try and edit the directories, but when I use it it doesn't recognise 'right' as being a function and only recognises it as a right property, thus producing an error.
I was wondering if there's something I haven't imported or if perhaps 'right' is an obsolete function that was used in VB6 but replaced with something. The code I have is as follows:
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I have an image with a button for zoom on it. I want to zoom-in and zoom-out the image with mouse scrolling up and down, right and left. Can anyone help me with some example to understand how this can be done?
View 3 RepliesI'm using some functions which can be compared to encoding/decoding, but it's a really simple and basic application, not really an encoding function.The problem is, the decoding function doesn't seem to work. For some reason, it doesn't work correctly, and I'm a bit stressed, so even after searching for a while, I can't seem to find it.[code]
View 2 RepliesI want to change my default keyboard Layout for a installed another Keyboard Layout using my VB application.I googled about this and find Function LoadKeyboardLayout() Function to do that.But Is this support in vb 2010.When I wrote below code and there is no syntax error.But when I run the program there is an error called "PInvokeStackImbalance was detected." How can I solve this in vb 2010. Here is my code:
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I tested every example I found but it doens't work in vb 2010 express... Do I need to install anything moor to make it work?
View 2 RepliesI am creating an text encryption/decryption for my friend and I to use on facebook, because his parents read his messages. I made everything correctly, but when I hit the buttons they don't do anything.
VB
Dim strString As String
Dim strString2 As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim strString As String
[code]....
i got 5 treeview with checkboxes when i click button update i need to uncheck all the checkbox i also got a button which can clear all the checkboxes which it uses javascript function to clear i was wondering whether execute update after tat execute clear button automatic? it tat any way to implement this function? here is my java script of clear button which word perfectly
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In cell A1 of Sheet2 I have the following text [code]how to I get VB to recognize that the 4<sup>th</sup> character of the string has character code 63?
View 3 RepliesI have work with BindingSource in VB NET 2008
--
dim bsA as new bindingSource
BsA = DB
DataGridView.dataSource = bsA
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but data has changed this is correct ?I don't wont change this data what I have to do ?
On my software , i have a function for search in the list a member . The function have more fields : Girls , Boy , Old , etc ... but the software doesn't work correctly. I want him to search with several conditions, adding AND. Here is the code :
Vb
For Each MemberALister As MemberInfo In _Listemember
If Me.Girl.Checked Then
If MemberALister.Nom.Contains(Me.Genre.Text) Then
[Code]....
I am migrating project from .net 3.5 to .net 4.0 and faced the following issue. There are 2 DllImport statements:
<DllImport("hid64.dll")> _
Public Sub GenerateHardwareID( _
<MarshalAs(UnmanagedType.LPArray, SizeParamIndex:=1)> ByVal Buffer As Byte(), _
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I'm doing a baseball program for a class project. And I almost have it complete, but it's giving me a syntax error. I can't figure out what i'm doing wrong. I'm using two functions to return a value for different type of baseball tickets to the button that calculates them. Here are the instructions 1.)User selects whether to purchase season tickets or single-game tickets 2.) User enters the number of tickets needed and the type of seats based on whether they selected season single-game tickets.3.) User clicks the Compute Ticket Cost Button to display final cost4.) User clicks the Clear Form button to clear the responseI just can't figure out what I did wrong. I know it's something stupid that i'm doing.the errors are happening inside the btnCompute sub routine. with syntax erros on SingleGameCost() and SeasonalCost() line 114 and 118
Public Class Form1
'Global Variables
Dim intTicketChoice As Integer
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I am having issue with this function where wait_rtn statement does not work and errors out with error 0. it is suppose to search the screen and if it finds (true) get out of the loop...
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In vb.net, it is possible to design a function which can operate on generic parameters which meet multiple constraints. For example, it is possible to have a function accept as a parameter a class which inherits from Control and implements IList. This function could use "Control" or "IList" methods on such an object, and also pass the object to anything that expected a Control or an IList [note that this particular combination was chosen to facilitate a brief example, not to be a particularly useful combination].
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This approach provides compile-time type-safety; there's no need for a cast that could fail at runtime. An alternative approach would be to pass the argument as either a Control or an IList, and have the function cast to the other. That would, however, fail at runtime if the object that was passed didn't in fact meet both constraints.
Under what circumstances is it good to use a generic function like the above, in what cases would it be better to have objects which are going to meet both constraints have a new interface like IListableControl(Of T) which would include a TheControl property that would return itself (cast as a control), and in what cases would it be better to have a generic ISelf(of T) interface, any implementor of which would be expected to provide a "Self" property that would return itself as a T?
Using multi-constrained generics, it's possible to do a lot of things without requiring any run-time typecasts, but I don't know what the performance costs are likely to be. I tried writing a short program to generate 65,536 different generic types at run-time, e.g. Foo(of Bar(Of Foo(Of Foo(Of Bar(Of Foo(...(Of Blah)) and it got pretty slow, so I can tell that the time required to handle generics isn't fixed, but I don't know what factors affect it.
this is my code:
axWebBrowser1.Navigate(url,
ref flags, ref targetframe, ref post, ref headers);
this
[code]....
Im using TCP cliente to connect and receive data from my server. To read received data im using this code:
[Code]...
It works fine when server response is detected but when there is no connection or there is no server respone the program starts to crash and doesn't work, so i have to break the debuggind process.
how to count the lines in textbox1.text (with multiplelines). I don't need to count each character. I only need to count each line from top to bottom in textbox1.text (multiplelines) and I will use Label1 to display the numbers.
example:
1-pauljaones
2-tommyperrry
3-marktoms
4-Jonessmith
5-paulwhite
Obviously this is 5 lines and that's what I need to count.
I have written a simple script to get a bunch of lines from a text file (they will be filenames eventually) which are split by new lines and puts each one into an array..
Dim ary() As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If My.Computer.FileSystem.FileExists("C:MenuFiles.txt") Then
[code]....
The only thing I can do for now is either use the substring function to remove the first character from all array values after 0 but I don't like that because it's messy and what if the split "works" as I want it to one one of the lines and knocks of the first character when I don't want it to.
below are a few lines from my text file(10929 lines)I need to read each line and insert into MS Access. each line is a column in my table and the record changes on every 8th line or to be more specific(on every 8th line you will see a number [1,2,3,4,5,6,7,8,9.....] this is where another record starts,
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I want to draw string in multiple lines and and I want to know how many lines given string will take. I am using following method.
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I am trying to make a script to spit command lines to a bat file to compress a bunch of files singly and then delete the original ones. I am sure that is easy to most of you, but I living a ____ trying to do this. A have a file list like this one belo, which was created with a command -- Dir /b /s /a-D N: > filelist.txt
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read lines in a file, split the lines and spit the result to another file
View 2 RepliesI 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 found that when group by multiple values does not work well with VB.NET, but it works well with C# ,here are my code, is there something wrong with my VB.NET Code? Here is my VB.NET code:
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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]...
