Make Tab Key Invoke Command Such As In Exercise 40?
Sep 6, 2010How do you make the tab key invoke command such as in Exercise 40 ,Page 51?
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Vb2008 - Randomizing - Addition Exercise Or A Subtraction Exercise ?
Jul 2, 2011I have (label1.text), a combobox(items = + , -), (label2.text) = answer1.text
What I want to do is randomize if its an addition exercise or a subtraction exercise.
Invoke Command To Change Value Of Progressbar1 To 50?
Mar 9, 2009I am using vb 2008 express and i am using the backround worker component. I am trying to change the value of progressbar1 to 50. Whenever I type progressbar1.value=50 in the DoWork section for backround worker, it says I need to use the invoke command because I am on a different thread.How do you use the invoke command to change the value of progressbar1 to 50?
View 6 RepliesVS 2008 - Invoke The 'click' Event Of A Command Button
Feb 7, 2011It was pretty simple in VB6 to invoke the 'click' event of a command button (i.e.; btnNext_Click). I am having difficulty trying to do the same think in VS2008.
I am getting errors at line btnNext_Click(): Error1Argument not specified for parameter 'e' of 'Private Sub btnNext_Click(sender As Object, e As System.EventArgs)'.
Error2Argument not specified for parameter 'sender' of 'Private Sub btnNext_Click(sender As Object, e As System.EventArgs)'.
Multithreading - Me.Invoke Doesn't "Invoke" - Threads Stall On Invoke Statement
Mar 16, 2010I've got the following code:
[code]...
The problem is that, when I call the "SetStatusBarText" sub from another thread, InvokeRequired is True (as it should be), but then my threads stall on the Me.Invoke statement - pausing execution shows them all just sitting there, not actually invoking anything.
Make An Invoke Or Safe Thread Call?
Jun 22, 2010i got a background worker that has the following code in the do work.... one of the things i want to do is to add rows if theres none available ...but i got an error saying i need to do a safe call thread...i already read about it but im stuck i put control.invoke, but that gives me an error too saying Error 1 Reference to a non-shared member requires an object reference.
[Code]...
VS 2008 : Make An Invoke Or Safe Thread Call?
May 27, 2010i got a background worker that has the following code in the do work.... one of the things i want to do is to add rows if theres none available ...but i got an error saying i need to do a safe call thread...i already read about it but im stuck i put control.invoke, but that gives me an error too saying Error1Reference to a non-shared member requires an object reference.what can i do to add rows safely?
vb.net
Private Sub BackgroundWorker2_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker2.DoWork
If DataGridView2.Rows.Item(num).Cells.Item(0).Value = "" Then
Control.Invoke(DataGridView2.Rows.Add(1))
Using Modulous And Division In An Exercise
Mar 6, 2005This exercise says :"Write a program that inputs one number consisting of five digits from the user, separates the number into its individual digits and prints the digits separated from one another by three spaces each. For example, if the user types the number 42339, the program should print
4 2 3 3 9 Use the command window for input and output. [Hint: This exercise is possible with the techniques discussed in this chapter. You will need to use both division and modulous operations go "pick off" each digit.]"
Here is what I have learned in Chapter 3:
�If/Then Statements
�Console.Write()
�Console.WriteLine()
[Code]....
This exercise I have yet to start, and don't think I will be able to do much, because I have no clue how to "Pick off" the numbers using division and modulous operators. I know what the mod operator does, but I do not know how to use it and division to do what this exercise is asking me to do.
VS 2008 FilesystemWatcher - Treeview.invoke - Error "invoke Or Begininvoke Cannot Be Called On A Control Until The Window Handle Has Been Created"
Aug 27, 2010I have a filesystewatcher object. On it`s event it runs a procedure which fills a treeview with a data. I had problems with treeview methods, but when I run them using invoke method everything is ok. But I still have one problem. When I load the form for the first time, everything works fine. But, when I then close the form (me.dispose, me.close), and load it once again, when Filesystemwathcer start the procedure i have an exception "invoke or begininvoke cannot be called on a control until the window handle has been created" trying to run a treeview.invoke method?
View 9 RepliesExercise On Sub Procedure To Calculate The Average?
Jun 22, 2010Write a program to calculate the average of three exam marks. The input and output should be done by subprograms GetMarks and DisplayAverage respectively. the calculation should be done by a function, CalcAverage. This is my code:
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim student As String, exam1 As Integer, exam2 As Integer, exam3 As Integer
Dim average As Double
lstResult.Items.Clear()
[code]....
Parking Charges Exercise In VB 2010?
Nov 13, 2011A parking garage charges a $2 min. fee to park for up to three hours.The garage charges an additional 50 cent per hour for each hour or part thereof in excess of three hours. The max charge for any given 24-hour period is $10. Assume that no car parks for longer than 24 hours at a time. Write a program that calculates and displays the parking charges for each customer who parkes a car in this garage yesterday. You should enter in a TextBox the hours parked for each customer. The program should display the charge for the current customer. THe program should ise the method CalculateCharges to determine the charge for each customer. Ise the techniques described in the chapter to read Double value fro a TextBox. [ You may need to use methods Convert.ToDouble and Convert.ToDecimal when doing calculations with the number of hours and charges]
Public Class ParkingGarageFeeCalculatorForm
Private Sub calculateButton_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles calculateButton.Click
Dim hoursParked As Double = Convert.ToDouble(hoursParkedTextBox.Text)
[code].....
FAQ: What Is Platform Invoke Service (P/Invoke)
Apr 10, 2009What is Platform Invoke Service (P/Invoke)?
View 1 RepliesInvoke UI From Separate Thread Does Not Invoke
Oct 13, 2010We have a UI with a progressbar. I know how to invoke, safely, the control from which it was not created from a thread. there are threads being processed in a threadpool, all of which calls an "agent" (which is a notifier to raise an event back to the UI to then increase the progressbar). an "agent" is set as a property in a State object, which is then passed into a method which will be executed on the ThreadPool. so, I invoke on the UI the method to update the progressbar, but the bar does not seem to update at all (screen frozen) and it takes a very very long time for it to execute. without threading, no problem.
[Code]...
Control Can Exercise Over A System.Windows.Forms.FlowLayoutPanel?
Oct 23, 2009I've been working for several days on a GUI where a lot of individual data elements need to be displayed side-by-side and wrap to the next line when they overflow; the goal is to not have to explicitly design an individual 'row' element with a set number of elements for this purpose. The FlowLayoutPanel seems great, except...
I need to be able to determine how many elements are on each line (dividing the width of the control by a predetermined value indicating width of child controls does not work); I need to be able to determine how many elements will be on each line (I may need to put 4 elements on line 1, then auto-wrap, then 8 elements on line 2, then auto-wrap, then as many elements as can fit on line 3 before autowrap, then 16 elements on line 4, etc); and finally I'd really like to put a 'line header' at the left margin and a 'line footer' at the right margin, where for example the line header contains a line number and the line footer contains the number of elements on that line.
Unable To Check The Exercise Answer One By One As The User Inputs The Info?
Oct 5, 2010I have a form that has 10 addition execises. The user has the option of using a timer or not. I have the timer part correct, but now I want to be able to check the exercise answer one by one as the user inputs the info.
[Code]...
2008 Windows Form - Get Percentage Of Right Answers In A 10 Question Math Exercise?
Feb 1, 2011I have a form with 10 math questions. Beside each question there will appear a check mark if it is right and a X if its wrong. I also have a label that will display a score in percentage. If 2 are right then it will display 20%. If they are all right then it displays 100%. My problem is ...how can I code the event. I thought of case select, but that would mean 100 cases to make it work.( If check1 and check2 are visible then display 20%, but if its check1 and check 7? Thats alot) What I want ot know if there is an easier or shoter way to ontain the same result. I am working with Visual Basic 2008.
View 7 RepliesHow To Make Voice Command App
Aug 12, 2011How can I make voice command app??
View 1 RepliesMake Changes To The (command) Buttons?
Oct 17, 2011how to make changes to the (command) buttons? I dont know working with user controls so if you can please tell me some books to read about
View 2 RepliesMake .net Command-line Exe Accept Img%03d.png?
Oct 17, 2011Command line programs like ffmpeg.exe accept a parameter like so: c:> ffmpeg.exe -i img%03d.png img.gif This will grab all these images in the directory and use them inside the program:
[Code]....
Is there a clever way to implement this in my VB.net command line project, or do I have to parse the argument for the %0?
Make A Command Line Program
Sep 24, 2010I want to make a command line program BUT I really want to have a call function. I have tried this:
[Code]....
Make If Command Apply To More Than One Thing
Jul 29, 2009i was wondering if theres a way to make an if command apply to more than one thing, this is my problem: theres 9 white squares and if theres one or more thats orange, then a numer.text goes down one but at the moment theres 9 white squares and for every one thats orange the score goes down one, so if three are orange then the score goes down by three, or if five are orange then the score goes down by five, I'd like to make it so that even if there all nine the score only goes down by one.
View 13 RepliesDeployment :: Make A GUI Exe Run A Module In Command Line?
Oct 20, 2009I have a GUI VB application, and a seperate command line module. How can i run the command line module through the gui app, without binding / installing?
View 5 RepliesHow To Make Command Accessible (Protection Level)
Oct 17, 2011I'm just taking over an asp.net/vb site, and I'm definitely still learning. I'm receiving the following error:
BC30451: 'ByOwner' is not declared. It may be inaccessible due to its protection level.
I call a datasource with:
<asp:GridView ID="CaseCountByOwner" runat="server" AllowSorting="true" DataSourceID="ByOwner"
And here's what is in the codefile:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
HitMe.AddHit(Request.UserHostAddress, Request.UserAgent, Request.Url.ToString)
Dim user As String = Request.QueryString("user")
If user.Length() = 0 Then
[Code] .....
Make A Command Which Will Sum The Digits Of A Number In A Text Box?
Jan 16, 2010Recently I tried to make a command which will sum the digits of a number in a text box I used the following code
[Code]...
Make A Form With Movable Command Buttons?
Aug 15, 2011i want to make a form with movable command buttons.the aim is that these buttons will represent the computers that are installed in one room.or the tables in one bar.all the tables can change depending the order that user give.
View 11 RepliesWhen Select Something On The Listbox, Make A Button Do That Command?
Mar 7, 2011For example I have 2 things in the listbox:Install Registry keyDelete filesIf I choose "Install Registry Key" then the button should install the registry key when clickedIf I choose "delete Files" then the button should delete files when clicked
View 2 RepliesMake Console Type In A Command And Hit Enter By Itself With Form
Mar 6, 2009Note: I'm using VB express 2008 I would mostly like to learn about the console application. Like how to make it type in a command and hit enter by itself. The project I'm working on is a booter for my iPod (Long story) I would like to be able to- 1- Either click a button on a form and have the console pop up and input
[Code]...
Make My Form Bigger With A Click Of Command Button?
Jan 15, 2010How to make my form bigger with a click of a command button?
View 2 RepliesVS 2008 Make A Program That Sends An AT^ Command To A Port?
Aug 29, 2010I want to make a program that sends an AT^ command to a port The AT^ Command is
AT^CARDLOCK="TEXT IN TEXT BOX 1"
VS 2008 Make TCPListener Wait For Full Command?
Aug 14, 2009OK I am probably going to completely fail but I thought I would just try making an SMTP server (which came from another thread on here I was posting in earlier). At the moment I am just concentrating on RECEIVING emails via SMTP, I dont care about sending them yet.So the first thing I want to do is just make my server program be able to receive a simple HELO command from Telnet on port 25. Simple enough eh? Apparently not The problem I have is that my program starts reading the data as soon as 1 character is typed into telnet, rather than it waiting for the telnet user to press Enter before it starts to process the command. I've had a look around and looked at Athiest's examples but cant figure out how to make it wait. Here is what I have so far:
vb.net
Private Sub StartBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles StartBtn.Click
[code].....