Public Class ThreadSearch
Inherits frmStDetails 'Windows form which contains my control
Public Event finishedSearching()[code].....
This is the procedure I used to start the thread. It doesn't generates error but the problem is 'IT DOES NOTHING'.
I have 2 threads in my Program. Here is code for both of them
Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click
[Code]...
StartReceiving is working fine but StartWriting is called only once and that msgbox in startWriting is never called, any suggestions on this
I have a web app that I'm writing in asp.net, with vb code behind. The threads were working well when I had all my code in the aspx.vb code behind files, but after I moved the code into a seperate Class.vb file, the threads don't seem to be working in parallel any more. Below is a small section of my code.
It used to be that when the "botThread.Start()" method was called, the page would redirect to success.aspx, and work on the SQL query (RunBots()) thread in the background. Now when botThread.Start() is called, the page doesn't redirect to success.aspx until AFTER the RunBots() sub has been completed.
Recently i was trying to access the labels of main form (Form1) from a thread that was running on the other form (Form2), and I have noticed, that the label.Text is not changing.Form1 code - after the main Form is loaded I launch the second Formular, and the method on it : [code]There is a sample code attached to show how is it working.Is there any possibility to change the label values on the Main window?Peter.
View 2 RepliesI have two forms running in the same application but on different threads. HdForm and DataForm. I have a class library whit datasets and a stack in it. Cause both forms (different threads try to rad from the same class library i use a synclock to syncronize. But it seems like the synclock dont work.I get random errors in the HdForm while reading from myAr dataset. It says index out of range. But i know for sure that the index exist (i have make sure of that). When i click on the visual studio play button then, it goes again.If the index was realy out of range then it couldn't go further. So i think the synclock does not work and thus the dataset is changed in time while im the loop reading from MyAr.
[Code]...
I'm trying to sleep a single thread of code, when i try using System.Threading.Thread, it freezes the whole app, i need it to just freeze a portion of code.
View 11 RepliesI have a application that writes and reads from a serial port.The com-port is opened elsewhere in the early stages of starting / running frm_Main and is not shown. I have a button1 on my form and when I click it, the module 'RTUValues_Get_IOData' executes perfectly ok, with no errors.[code]However when I call it via a thread [button2], I get the following exception error and it hangs, at the part shown above in RED"Conversion from string "" to type 'Double' is not valid."
View 5 RepliesI just had a new, last-minute idea on to take on a task, so I am running to StackExchange for quick help.
What I want to do is execute a series of methods right in a row, each in their own threads. I want the application to wait until all of these threads are completed, after which the program will resume. It also has to use managed threading (thread pool).
What quick examples could you provide to help me along the way? If it's too complex, what things should I know about so that I can Google it on my own?
I have a main thread which is designed to be a batch processor - it spawns a series of 'child' threads from a loop (which can vary in terms of the no of items) - see below
[Code]...
However, each of the 'child' threads could take anywhere from milliseconds to about a minute to process - depending on the complexity of each calculation. There may also be a large number of child threads - e.g 100s. Creating large numbers of child threads is not efficient. I therefore want some way to effectively queue each child thread (and cancel if the process is taking too long to complete). Autoevents seems like one way of doing this, but the only examples I can find seem to assume there are two different processes on seperate threads, not one process being repeated.
I build my first Project composed of several forms and it�s working just fine. Id like now to redesign the project as a MDI Application. Once created the parent form, I can create child forms but thats not what I need. What I would need is convert my already designed and working forms to MDI child forms. How can that be done?
View 1 RepliesSo on Form1 I got a TreeView, and on Form2 I have a Button. What I want is when I click the Button on Form2, it adds a Treenode to the Treeview on Form1... How do I do this? Do I use inheritance or partial class or what?
View 4 Repliesi am involved in a project where i have four forms. access,oracle,sql and display resptly. the fourth form is common form for the other three forms. in the fourth form i have to write a code that opens connection to oracle database if its previous form is oracle or opens connection to sql database if its previous form is sql.
View 1 RepliesI am currently making a book shopping cart. look at the pictures to get an idea.(main is the first form "file books" is when the second printbook opens and user selects. The application has four books and calculating the subtotal of them. The user can choose to buy any ammount of books. The "Add book to Cart" button calls the module1 Module1.main1()
And this is the module1 code ( I tryed using a select case)
Module Module1
Public Sub main1()
Dim Print As Decimal
[Code].....
I have a couple of questions regarding the use of multiple forms within a single project.I'm currently using a button to load a second form so that the user can select different options and then load those options from the first form.Basically, I have a check box on form2 and I want form1 to be able to know if it is checked. I thought I could just use:
if CheckBox1.Chcked = True Then
Etc.
End If
But, when I do, I get an error saying it can't identify the object I'm referencing.Also, when I open the second box and I click my "OK" or "Cancel" button, the page reloads and then I must press it a second time for it to actually close.This is the code I'm using on my first form:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim frmDialogue As New frm2Toolest
frmDialogue.ShowDialog()
If frmDialogue.ShowDialog() = DialogResult.OK Then
[code]....
The second form that has the buttons:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOK.Click
Me.DialogResult = DialogResult.OK
End Sub
[code]....
I created a VB.NET Windows Forms Application in Visual Studio 2008. When I run my program from the command-line, I get no output (only the next prompt).
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Debug.Write("Foo")
Debug.Flush()
[code]....
EDIT: Can a program have a form and a console?
EDIT2: However, the output appears on the next command-line prompt. Can a Winforms application tell the command-line to wait until it's finished instead of immediately returning?
I designed a software in which I used active captionas background colour. Now It works on my computer or current OS but not working properly onto other computers or OS. I mean to say that the background colour
View 1 RepliesLoading another form increases the memory usage of the application and after closing is not combing back to normal? dispose function at formclosed event is not doing that
View 12 Repliesthe message pumb of vb6 forms is taken by the hosted application (.NET) , we are currently in a process of calling our system from .NET but after using ShowWindow Lib "user32 API i stuck into same problem of Tabbing not work in correct way as it had been set in design time , ChaosTheEternal solution dosnt show form as modeless which its reuired to me?
View 1 RepliesIm very new to programming all together, but Ive recently been messing around with Visual Basic 2008..
1. When using multiple forms, how do I make a form be the form that opens with the program (default form?)?
2. How do I assign a button to open a second form?
With what I'm trying to make, I have both forms ready, I just need form2 to be the one that is the first to open when running and I need the code for a button to open form1.
I am using a parent for with child forms and i have made the option to "Float" the child windows outside of the parent form and "dock" them back in if you want.I'm doing this with a button on the child form to float/dock it. On the other hand I'd like to use a checkable item on the menu to choose if they are docked or floated from the opening point.
View 6 RepliesI have a login form (startup form) with OK/Cancel button, and each set on the form as Accept/Cancel button - works fine.
After login my main form loads, it has keypreview on. This main form opens a new form (after user clicks a client search button) with an OK/Cancel set up the same as the login form.
On this search form, the Enter key works (it calls the OKbutton click just fine), but the Esc key does not.
The cancelbutton property if set to the cancel button, and this form does not use keypreview.
The form has focus, I clicked it to be sure, but in any case the enter key works.
My Problem is, that I have some Buttons, Labels and TextBoxes I need to generate after the User told a number of Players. With the Code I'm using now only the last Player will have these Controls working, because they are moved - for example - from Player 1 to Player 3. how to create such a ControlArray The biggest Problem I have is, that these buttons have to have names like "1", "2", "3" and so on (or if it works somehow to read out the Index of a ControlArray the names will not be necessary).
This is the code I am using right now to generate the Controls, but as you see it won't work, because the properties will be changed when the For-Function restarts.What I need is a hint on how to get these Controls/Buttons into a Control-Array and then read out the Index-Number to use them in the Functions that are called.
Public Class Form1
Private btnTestNumButtons() As System.Windows.Forms.Button
Private Sub CreateButtonArray()[code]......
I have two forms frmA, frmB. I have a listview on frmA with a couple items with tags. In the listviews Itemactivate event I get the FocusedItem's tag and open frmB. Everything works fine until I close frmB and come back to frmA. The original item is still selected but the Itemactivate no longer opens frmB. I can step right into the frmB.Show line on frmA, it's just that frmB nevers shows.
Private Sub ListView1_ItemActivate(...) Handles ListView1.ItemActivate
Select Case ListView1.FocusedItem.Tag
Case "showfrmB"
[code]....
I've tried adding Hides, Activates, etc. with no luck.
I have the following sub that displays the progress (the Animation speed is 50 - but I've tried with other values)
[Code]...
I should mention that the control is created dynamically and placed on a dynamically created TabPage that in turn is added to the main tab control that is on the static form (Form1) that is refreshed - but I do believe that 'Refresh' should ripple though to all sub controls?
So here is the deal. I am making my own program for fun, and I have this road block. Basically I have a 'Parent Form' which we'll call 'frmMain' and I also have another form which we'll call 'frmSchedule' (work with me here)
[Code]...
In this example I want the loop button works in all mdi child forms at the same time; now in the first mdi child form it will work, but when getting a new mdi child form with that, it will stop in the first one!
View 3 RepliesI have a form from which I am visually representing data (from access database). I have set up a user log on a separate form (allows user to make comments as they scroll through the data and see any points of interest etc). The second form is linked via a textbox in terms of a common field in this case the field name is "Datetime".
What I want to do is be able to scroll through the data and make notes on the second form and add them to another table in the database. I have managed to do all the above but obviously loose focus of the second form when i scroll through the data on the first. Is there any way of being able to interact with both forms at the same time?
I'm working on a Windows forms app that will average a set of numbers, the only catch is that there are 10 textboxes(4 in the example for times sake), and not all of the textboxes could be filled with a number...I know that if i had a given set of numbers:
Dim a, b, c, d As Integer
a = t1.Text
b = t2.Text
c = t3.Text
[code].....
I have an event called "worksheet_selectionchanged" which occurs when a range/cell is selected in an excle file.When the event is triggered, all the tabpages in a tabcontrol should be removed.The code is given below:
Private Sub myWorksheet_SelectionChange(ByVal Target As Excel.Range) Handles myWorksheet.SelectionChange
for each tabpagesToRemove as TabPage in tabcontrol1.tabpages
tabcontrol1.tabpages.remove(tabpagesToRemove)
[code]....
but when ever i select a cell in the excel file, the tabpages seems to be "not removed".
I refer to the CompileExecutable function at.>> [URL] I have attempted to try and get it working for a Windows Forms based application from about my 4th post in this thread.>> [URL] Has anyone had any success in using it or a variation of it? links to VB.Net tutorials see here.>> [URL]
View 1 Replies