.net - Retriggering A VB Subroutine, How To Serialize Execution?
Mar 14, 2009
I have a VB.NET subroutine that is triggered by a timer. I have found that on occasion, if the routine runs for a long time, the routine will be triggered again while it is still running with unpredictable results. Is this normal? Is each copy of the routine running in its own thread? Is there a way to serialize the routines? Right now I use a Boolean that I set True on entry and False when I am done so I can check if the routine is running when I enter it, but I thought that there might be something more elegant.
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May 24, 2010
This is one of those "seems obvious" as how to do, but came across interesting side effect in implementing. I'm trying to keep two text boxes syncronized when information is updated. In this example, I will be using txtStartDate and txtEndDate. If the txtStartDate is changed, then the txtEndDate should should be updated. Likewise, if the txtEndDate changes, I want the txtSartDate to be updated. The side effect I'm comming across is that when I set them up under the TextChanged event for both, the events seem to retrigger against each other indefinately (endless loop?). Am I using the wrong event? Is this a task for a delegate?
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Aug 17, 2010
If a class is serialized and has events fired from it that are handled on a form you get the error "Form1 cannot be serialized" in c# you can use (to work around this):
[Code]....
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May 9, 2010
I am trying to get the hang of this stupid VB.net, but it won't even let me create a subroutine or function, it use to be in the tools menu in VB6. I have spent £50 on 2 books that rabbit on about objects, property's classes etc: but tell me nothing of what I want/need to know, what a waste of money.
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Dec 4, 2011
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim d As Integer
Dim price(20) As Double ' Adjusted close price
[code]....
What is the for ... next loops in the second subroutine doing? What is the sim() array meaning?
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Jul 23, 2009
Does anyone know how to get x value form another subroutine?
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May 1, 2010
I have a form that is bound to a table of data. I have a typical binding navigator. When I go to a different record such as next, previous, first or last I need a subroutine named "LayoutAdjust()" to execute "after" the new next record data is loaded on form. I tried calling the subroutine in the "BindingNavigatorMoveNextItem_Click" action but it executed the procedure before the next record data was loaded
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Jun 23, 2011
I have the following code which works well:
Dim dept As New ArrayList
Dim forename As New ArrayList
objJSONStringBuilder = New StringBuilder()
[Code].....
Eventually, I will want to add more columns, i.e. surname.
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Apr 26, 2012
I am trying to call a rest service..that service returns json object...I am able to send the request but unable to serialize the json...here is the code i am trying
[Code]...
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Mar 15, 2010
This is for a web project so i have several classes that inherit from Web.UI.
I only want to serialize very particular properties (basically, only local properties)
I'm aware of the XMLIgnore property that can be placed on a property to ignore items, but this won't work in my context since that would require modifying a bunch of stuff that i really don't want to modify (and probably can't).
So how do i tell the xml serializer to ignore everything except for X and Y or tell it to seralize just X and Y?
i could just create my own xml in a string builder or something and if that's the only way, so be it. however i'm looking for a method that will employ the built in XML stuff.
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Jan 13, 2011
I am trying to read in an XML document, add a record with a tag for the filename and write to a different XML document.I have been told I must use serialization.
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Nov 2, 2009
I have a hash table in which the key is of type Point and the value is of type PieceOfBoard. PieceOfBoard is derived from PictureBox. How do I serialize this hashtable to save it to a file?Do I need to add anything to the PieceOfBoard class?
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Oct 9, 2011
How can I serialize a .net object into XML and then de-serialize it back?
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Nov 7, 2009
how to serialize a listview using vb.net
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Feb 27, 2010
I'm writing a test application in order to figure out how to serialize a structure to XML. I can not get the following code to work for me and it's not obvious to me.
The following defines the structures I am attempting to serialize. I think I have the xml decoration correct - but the errors I'm receiving (see below) don't really give me much information.
Imports System.IO
Imports System.Xml.Serialization
Public Module modTestSerialization
[Code]....
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Aug 9, 2009
Is it possible to serialize a toolstrip?
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Feb 7, 2010
I have an old program written in VB6. I upgraded the program with VB 2008. The updated program works fine except when the program tries to transfer an array to another subroutine. The old VB6 program sends arr(0) as an argument to the subroutine, the address of arr(0) is passed to the subroutine. The array arr() address is the first of a block of consequent addresses one by one, arr(1), arr(2), etc.
Now when running VBnet, the address of arr(0) is not the first of all consequent arr(1), arr(2), etc. It is an isolated number, just like if arr(0) were a variable instead of an array. The addresses of arr(1), arr(2), etc do not exist in the subroutine. [Code]
The variable of y1 passes to the subroutine oK, whilst arr(0) passes also like y1 into an isolated address. So VBnet interprets arr(0) like a variable rather than the first value of a long list. I haven't been able to find out why the above sample does not work. I got stuck in my programming effort, as I cannot proceed to to further development. how the code should be modified to enable the whole array information passing through the subroutine.
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Jun 27, 2011
Problem is, I need to call a VB.NET function from javascript, no two ways around it. This is a bit harder to find.BTW -- Web/Page methods won't work. I have to be able to reference a listbox and it's selected items when the VB code-behind fires.
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Jun 21, 2010
what I need to do is to call/run/execute a subroutine using a varaible name from a subroutine.
Public Sub Main(ByVal subName as String)
Call subName ' subName may be contain the value AAA or BBB
End Sub
[code]....
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Jun 16, 2012
I am trying to make a counter go up by 1 every time a subroutine is called But i dont know how to word it. Here is the code. [code]...
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Feb 23, 2010
I'm writing a class library and I need to be able to shut down the main code in certain cases.
I know I could raise an event and listen for it in the form called by application.run but I would like to find a way around it.I wouldn't be opposed to try to throw an exception that if unhandled would close the application... but would prefer to come up with a more elegant soln.
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Feb 4, 2011
I am trying to execute the "Data()" subroutine at startup. This did not work:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Call Data()
End Sub
Is there a way to call the subroutine at the begining of debug?
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Dec 11, 2011
I'm following this tutorial [URL] and it says to Open form1_Load() subroutine. What does this mean and how do I do so? It is really important.
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Feb 1, 2010
When you access a subroutine by one or more other subroutines each time the variables are zeroed like 'n' below. How can I keep n saved so main can increment n each time.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]....
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Jan 19, 2011
have a look at my VB/ASP code and tell me if you can see what's wrong (I highlighted the important segments in red):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<%@Page Explicit="true" Language="VB" Debug="true"
[Code].....
Basically, I'm trying to get the Page_Load subroutine to execute on the page load, but it doesn't seem to be called. I'm assuming that because I set my feedback label to "feedback" in the Page_Load subroutine, I should see it displayed on the page saying "feedback" on first loading the page and every time I refresh. But this doesn't happen. I'm lead to conclude that the Page_Load subroutine is not being called on the page load.
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Jan 19, 2011
VB/ASP code and tell me if you can see what's wrong (I have bolded the important segments):
[Code]...
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Jan 24, 2012
How do I pass a list as a parameter to a subroutine? I don't know how to specify the variable type in the receiving routine.[code]...
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May 12, 2009
I have two subroutines that consists of two datasets. I am not sure how to pass some data in first dataset named dsGoodStudent to second dataset named dsBestClass.
Private Sub Classification()
Dim SqlSelect As String
SqlSelect = "Select Name, Age, grade from tblStudent where grade = 'A'"
[Code]......
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Dec 15, 2011
So I created a subroutine to do some work but now i have no idea how to pass the results on to another stage in the process.
Private Sub CheckDates() Handles MyBase.Load
Dim Duedate As Date = INFDateLabel1.Text
Dim Duedate2 As Date = INFDateLabel2.Text
[Code].....
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Dec 15, 2009
Having a time trying to figure out mapping a key to a sub. When ever the window is the top window active window I was wanting to map the key ' z ' to run my command. So when the ' z ' button is pressed the motor command is run. Then will map the ' x ' key to go the other direction.[code]....
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