Just trying to run a basic program where the user is prompted to enter five names, one at a time. I'm prompted one time. After entering one name I get the following error "Unhandled exception: System.NullReferenceException:Object reference not set to an instance of an object"
Here's the
Module Module1
Sub Main()
Dim SortedList
For SortedList = 1 To 5
[code]....
y question is I have a program that is used to add inputs to an array when the OK button is clicked. My problem is that the after the first click of the OK button the Do while loop does not execute again for a 2nd click.lling out my hair. Here is the code.
Public Class InputValue
Public Shared InputArray(0 To 9) As Integer
[code].....
I would like to know please how to check whether a string exists or not in a html code. I'm executing a for loop. Each time it checks a different url, so I want to be able to check each time if for example "<img" exists .
P.S: What's the difference between using
webrowser1.navigate
AND
dim request webrequest
request = WebRequest.Create
etc...
Makes the following statement about the code below:
**"The computer evaluates the loop condition in the Do...Loop statment to determine whether the loop instructions should be processed. In this case, the inputsales <> String.Empty condition compares the contenst of the input sales variable to the String.Empty value. As you know the String.Empty value represents a zero length, or empty, string if the inputsales variable is empty, the loop condition evaluates to True and the computer process the loop instructions. *If on the other hand the inputsales variable is not empty, the loop condition evaluates to false and the computer skips over the loop instructions.
Based on the code I think it is the opposite: ...that while the inputsales value is not empty it should evaluate to true and process the loop and if it is empty it should evaluate to false and skip the loop?
See below.
Option Explicit On
Option Strict On
Imports System.Globalization
[CODE]...
I know I am missing the obvious. I would like a label to show how many cycles in loop are left.
[Code]...
I am constructing a program, i am new to Visual Basic, but i have past programming experience. I was wondering if anyone knew how to form a loop that could...lets say calculate the answer when two numbers are added together,and it would repeat this thousands of times, etc. And if there is a way, would it be possible to calculate the time taken to complete this loop.
View 5 RepliesI have written a function that gets the alexa ranking of a given url, now this function works perfectly but I want to loop through a ListView of urls and grab the alexa rank of each item (url) with my function.The code works great if I put a MessageBox in the loop to test that the function is returning a value but when I remove the MessageBox the loop does not work.I need it to loop through adding each result without a MessageBox stop in each loop.
vb
For Each Item In ListView1.Items
Dim result As Integer
result = GetAlexaRank(Item.Text)
[code].....
we want to write a DLL using VB.NET 2008 using .Net 3.5 that performs an HTTP request we then want to call the DLL From SQL Server 2005 (in a trigger) and pass the DLL some variables and get a return value.Where im at in the process.I have created the DLL 'HTTPDLL.dll'
Source:
Imports System
Imports System.Configuration
Imports System.Collections.Generic
Imports System.Text
[code].....
Perhaps i am calling it incorrectly but i havent been able to get it to work (always return 'invalid class string')
im working in a windows app that execute another apps.. writing the name of the app in a text box (i.e firefox.exe) and click enter to run it im using >> (System.Diagnostics.Process.Start(app_name.Text)) to run apps it works fine with me .. but it didnt with some apps like when I write for example ares.exe it says:Win32Exciption was unhandled :The system cannot find the file specified
View 1 RepliesI am running SQL 2005 Standard Server. I am using Visual Studio 2010 for development.
Let me just say that what I have below works, I would just like to have some constructive critisism.
CODE:
how to get the name of the currently executing method? I was thinking it was somewhere under My.Application, but I can't find it...
View 4 RepliesI'm trying to execute a SQL command, but I just can't find out why this is not working.This is how I defined the "execute" function in my class named "clsSQL":
[Code]...
I have the following code:
Code:
Imports System.Data.SqlClient
Imports System.Data
Public Class Main[code]...
and the sub Exceptionquery is not working. I can verify this because it is supposed to create a new table called scratchpad3. what I may be missing in that sub routine that isn't allowing it to work?
I have two if statements and my project sees one and not the other. Here is the code:
If (IsPostBack) Then
HandleUploadedFile()
End If
Dim savePath As String = "Images "
If (fileUpload.HasFile) Then
[Code] .....
When I trace my code I find it goes to the second if and then go to end if without running the code inside the conditional.
I have a sub in which I call different subs, depending on a value I pass through. It works fine for all but the last one. It executes the sub I call but then comes back to the first sub and runs the second one again
[Code]...
So I made a simple patform game where the player has to jump quickly while the platforms move to the bottom of the screen, as to not touch the bottom of the screen. But, I need to know how to create a loop to loop the locations of the platform. This means that after twenty or so platforms, the same platforms come up again, so that the player will have an "endless" game. I've declared all the platform's locations relative to the location of the first repeating platform:
[Code]...
I assigned an integer as 1, and looped my program using:[code]I can recieve the packets without looping, but once i loop, i receive nothing.
View 29 RepliesI am compiling and running code at runtime. Can I stop this code midway through if I wish? Like the 'stop' feature in Visual Studio that stops the code if desired?
View 2 RepliesI'm trying to eliminate a VB.NET button on my aspx page. Trying to use javascript and ajax to execute the same code my vb had.I put in a script manager, set EnablePageMethods to true, added a static subroutine, and referred to it in my javascript function (BTW -- this seems a lot of work just to execute an existing subroutine). The javascript calls my code-behind and it almost works.Problem is, now I'm getting a NullReferenceException when SimulatePrintBatchClick tries to do anything with the controls.
Error is 'Object reference not set to an instance of an object', line is 'pnlVars.Controls.Clear'
Here's the code from UW.aspx:
<WebMethod()> _
Public Shared Sub PrintBatchFromJSWM()
Dim UWI As New UW
[code]....
when I run the above code in PrintBatch_Click it all executes just fine. I really don't understand why it bombs out as a subroutine.
Perhaps this is not the way to do this, but I'm at a loss for finding a different way. Originally this code was handled by an ASP/VB button, but the specs have called for it to be deleted.
background worker is not executing all the code in side it. windows application..Although there is not any exception.
View 6 RepliesI can step through a routine that creates sql tables and the process is successful. However when I simply allow this same routine to run it does not.[code]...
View 1 RepliesFirst, Im new to VB but have been programming for 20 years.
Ive been creating an application that starts with a form that has 4 text boxes with corresponding search buttons.You key something in to one of the text boxes and click the corresponding search button and it would execute the code in the button click event. It worked.
Ive done something though to make it not work.When I run it and click on the button it doesnt run the click event.
If I double click on the button in the development mode, it should, I thought, go to the click event in the code but it doesnt.It creates a new click event with the same name as the original but with a_1 appended on to the end of the name.
I`m now at the point calling server from vb.net, and run query inside vb.net code.I have write two codes on button click. One button is checked server connection, other should execute query for server table.Connection code is working, as I have set two messages, and getting successfull message. Second code is not working, as nothing happened when press button. Sql statement is very simple, and it works if I run it manually.[code]
View 19 RepliesI have some code in Form Load event. It is doing fine. But when it reaches to pick data from database, no commands are executing after that. There is no error at all but it just goes silent.[code]...
View 3 RepliesSince i set my 3rd party addins to be copied local i am now getting an error which is below.
When i selected Build i set the build to release. Why is it so difficult to get your application published and running? It runs fine in debug but when you come to do a release build it wont run.[code]...
how would i got about executing another file from my application with hidden attributes so its not visible?
View 5 RepliesHere's an example code so you can understand my problem:
Dim test1 As String
Dim test2 As String
Dim test3 As String
[code]....
shell.Run("""testProgram""test1 test2 test3 test4") 'I know this is wrong.My problem is in the last line. I want the contents of the strings to be printed, not the names of the strings, and I don't know how to do that.
I created a ssis package in visual studio 2005. I want to execute the package from vb.net code. How can this be done?
View 1 RepliesI'm trying to make a program that has command buttons, each running a different file. I have added some files so far, but I encountered a problem with a couple of them.
For example, I want to run Zuma's Revenge! right from the program, but it is not working. If I run the game from outside the program, it runs perfectly, but when I try running it from the program, it keeps saying "Zumas Revenge! - Adventure has stopped working."
What really confused me, is that the game is running normally if I run it from its folder or by using the shortcut, while from the program it isn't.I'm using Windows 7, with Visual Basic 2010 Express.
'Here's the code I'm using:
Private Sub Zumas_Revenge_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Zumas_Revenge.Click
Process.Start(My.Application.Info.DirectoryPath & "umas Revenge! - AdventureumasRevengeAdventure.exe")
End Sub
well i tried to make this vb code execute another app *hidden*(as in window not visible) and it didnt work because the window is still fully visible.. i dont know why, i think its just because of this particular kind of exe or something..
is there another way to really execute this file hidden? i dont know how to do it but i heard about mabye threading it or making it a windows service? will that solve this?
[Code]...