Indicate Which Code To Execute Initially?
May 17, 2009
I am totally new to VB2008, so please bear with this likely dumb question.
I have seen numerous "my first program" tutorial that show you how to create your form, put controls on it, etc. I can get through those just fine.
However, I am wondering: If I compile a set of subroutines into a .exe, how do I indicate which code/sub to execute initially? I am an old school programmer (remember COBOL?), and we always had a starting point; a set of code execute, that initiated execution of other subroutines, functions, etc.
I have dabbled in VBA for Excel, and MS Access, and even those, you indicate in the interface, and menus you create, that first bit of code that brings up the menu, or perhaps the program's main interface.
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Oct 19, 2009
The code below is used to check if the application setting, an arraylist is populated or not via the count method.
When running the program fails with error "NullReferenceException was unhandled" as initially the setting (arraylist) will contain no values.In similar circumstances I would declare a new instance of the object or set value to string.empty or check if DBNull.
I know application settings have a save method but to reference/load them one is not needed.I also left the value field in the projects -> settings to be empty.[code]...
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Dec 8, 2011
I have some code to execute code at runtime...
Here is the main
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
If TextBox1.Text.Trim <> "" Then
If TextBox2.Text.Trim <> "" Then
[code]....
When the button is pressed, it all works and the following files are created: yahoo.dll and yahoo.pdb My question is this: What is the code to load the already compiled yahoo files to execute the code again, without having to recompile the code?
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Oct 26, 2010
I want to execute a code after every 5 min.I am trying to develop the application in .net and using the C# as a backend language.My basic requirement is a C# code which executes after every 5min which i click a start button on my .net form.
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Apr 17, 2009
datasource to gridview.I have to populate gridview by adding footerrow.I have given visibility of footerrow as true.So one error is coming as 'Object not set to an instance of an object'.what may be the reason for this?Actually i need to add data into the Gridview through the FooterRow.After inserting a few records,i need to insert this data into the database.So, i want this Gridview only to insert data into the database.For a particular "FileID", i have many records,thats why i am using Gridview.Is there any other method for this?
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Jun 25, 2010
for example there is a file named abc.exe in c:
what would be the code for executing this file?
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Apr 16, 2010
Okay I have everything working as it should but when I first start up the data doesn't show up in the datagridview until I enter another record. It seems to be at the End Sub part of the button click Enter Record.This is what I have at form load event.
[Code]...
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Jan 27, 2010
How do you declare an array when the array is initially empty?? I am taking multiple measurements from a meter that I want to put into an array. How would I declare that?? Here is my code to accept the last measured value.
HTML
Dim measResult as string
For I as Integer = 1 to 4
measResult = objDevice.gpibRead(i, 30) ''30 is the buffer size
Next
How can I set up measResult so it is an array that will hold all of the measurements from the meter?? I have tried Dim measResult() as string, Dim measResult() as String = objDevice.gpibRead(1, 30) but no luck.
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May 31, 2012
I know this requirement may seem weired to many of you but it is one of my project requirement.Is it possible to add code in Sp and execute in .Net exe. Like on button click i call one SP that SP returns few line of code and then program execute the code.
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Apr 11, 2011
Been spending some time on Codility.com recently and it crossed my mind; how do they execute the code you have created (Specifically pertaining to C# and VB.NET) ?
What I am basically wondering is how would I take a textbox on a form type some code in it and then run that code? Is this possible without 3rd party tools?
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Dec 1, 2010
I need to to make a timer that will execute my code every 30 minutes
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Mar 23, 2010
Can anyone think of a clever way to execute a piece of code every time a form opens, application wide? I have an app with about 45 screens, and I don't want to drop code in each form load event.
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May 17, 2010
Can anyone think of a clever way to execute a piece of code every time a form opens, application wide? I have an app with about 45 screens, and I don't want to drop code in each form load event.
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Jan 26, 2009
how to run code "in the background".As a form is loaded into memory I have the following code filling a listbox from a database table with this sub.I read in one of the documents about making code efficient that I could make this execute in the background.The list box is not needed immediately.
Private Sub getReleaseChoices()
Dim da As New OleDb.OleDbDataAdapter()
Dim cn As New OleDb.OleDbConnection(gCnRefString)
Dim ds As New DataSet()
[code]....
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Aug 4, 2010
I have an app that allows a user to type in code that can be executed much like vba code in the office world.I currently execute this code with the Proprietary Dexterity code used with MS Dynamics - GP.However, my users need to be able to run outside the Dexterity world.The easy answer is to allow them to type in vb scripting or vb code instead of dex code.However, I can't find an easy way to dynamically execute their code within my methods.CodeCom looked like it could be the answer, but If i'm reading it right, I would have to know what libraries the user is using in their code for vb.Thus, I thought to simply limit them to vb scripting.Unfortunately, I can't find a way to execute vb scripting from within vb, (all the articles are ancient and most links fail - thus I gotta believe there is an easier way).I'm at a deadline where I developed the prototype but trying to use sql statements failed miserably when trying to execute.
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Nov 15, 2011
When ever i execute this code it hangs ..how to troubleshoot
Imports System.Net
Imports System.IO
Partial Class vbIPNexample
[CODE]...
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May 4, 2012
I'm trying to accomplish something fairly simple in VB that I do everyday in JavaScript.I need to parse text between two strings (HTML tags mainly) that have multiple occurrences.
Sample Data:
<tag>test</tag>
<tag>test2</tag>
<tag>test3</tag>
If I wanted to grab the data in the 2nd <tag> in JavaScript I would simply do this:
var result = string.split('<tag>')[2].split('</tag>')[0];
And the only way I seem to get that to work in VB looks like this...
Dim from = string.IndexOf("<tag>")
Dim [to] = string.IndexOf("</tag>", from)
Dim result = string.Substring(from + "<tag>".Length, [to] - from - "<tag>".Length)
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Aug 4, 2010
I have some code that access an API out on the web. One of the API's parameters allows me to let them know that I am testing.I would like to only set this parameter in my code when I am testing. Currently, I just comment the code out when I do a release build. Is there an automatic way of doing this based on the build configuration?
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Jan 11, 2009
I have a VB.NET application with Enable application framework checked, and Splash screen set. At the same time, I need to run some code before the splash screen is loadedMyApplication_Startup seems to go later, so it's not suitable. I understand it's possible with custom splash screen, but would prefer any other way to make it without more complex customization.
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Apr 30, 2011
Suppose I have two buttons btnCheck and btnOK. I want to execute few lines code of btnCheck from btnOK. So that When I click on btnOK, btnOK's code as well as BtnCheck's Code should be executed one after the other. How can I do this in vb.net
[Code]...
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Feb 15, 2012
ASPX [code]...
When i click on the div it does not execute the ServerSide Code ...why?
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Mar 15, 2011
I want a RichText box that will allow me to type basic vb code and then have this code executed. Similar to what could be done with SQL statements and ExecuteNonQuery, is there something similar to this for VB?
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Nov 16, 2009
im having a speed issue with a puzzle solution generator i am developing. its currently running fine.. but i would love to have it tick faster then 1 millisecond.is there any way i could get my code to execute up to uS(microsecond) speed? or even faster heh. i just need a continuous loop faster then a timer that can update the UI, or form?
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Apr 15, 2011
Is there a way to execute a block of code once the form is opened? What is the event procedure required for this?
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Oct 26, 2011
I am calling a sub from a form load event. The procedure that is being called adds columns to a listview and then loops through an array to populate the listview. I have another procedure called after the loop that does not execute when the loop completes. Please advise as to what I am doing wrong for the code not to execute after the loop in the if/then/else statement or why it is not executing if I remove the if/then/else statement and just placed the called sub after the loop or why the code does not go back to the form load event and then call the next called sub.[code]
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Sep 20, 2011
Is it possible to create and execute code at runtime?Eg, I make a string with this as the data: MessageBox.Show("Test")Then I 'run' the code from this string to produce a MessageBox
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Jan 25, 2012
I was reading a old post, and came along this post in particular by jmcilhinney... [URL]He states Quote: Originally Posted by jmcilhinney The other alternative is to do your initialisation from the constructor instead of the Laod event handler. My question is...how/where is the constructor? I can't seem to do the right internet search to find out how to do this.
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Mar 3, 2010
I've got a database that I've been working on for over a year and a half but I've just recently finished the back end to the point of feeling comfortable with starting on a front end.
[Code]...
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Oct 17, 2010
I am currently using Visual Basic 2008 Express Edition.I want to make a program that will draw 700 random lines on it initially. I tried my code but the lines only appear in the same way such as straight line and diagonal line. Here's my code:
Public Class Form1
Private Sub Form1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
[Code].....
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Sep 29, 2010
This may be a strange question and have no answer but I thought I would post it to see how you would go about doing it. I have a line of code:
Grade = Math.Round((Math.Abs(CorrectAnswers) / TotalQuestions) * 100)
Basically that line just figures out the grade no major code work there, what I want to do is execute that specific line with different variables without running the whole application and navigating to the point in the application which for this segment would be completing a 150 question exam, or coding some #temp page and running it from there.
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