Recently I was handling a TCP/IP server-client window-based program in VB.NET. But in VB.NET. after I include the winsock on it, it cannot check the state. Normally, in VB6, to check the state is as below: If
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Here is, basically, how my application works:
When windows starts, my app starts. Whenever my app is running, it hides the desktop, taskbar, etc... When a button is clicked in my application ("Start program"), then my application will set its visible property at false and another application will start.
Everything seems to work perfect except I need a way for my application to set its visible property back to true, but only once the other application that was started earlier, is closed (no longer running.)
My thought was that I could use a timer to check for the applications state every so many seconds:[code...]
I have 2 concerns with this:
1. A timer checking this every few seconds will invoke unneeded stress on a computer since they are running for sometimes very long periods of time.
2. There is a better way to accomplish this that doesnt rely on a timer.
Using .Net, I need to generate a response based on only the checkboxes on my form that have had there states changed. So how do I know if the check box has changed from its previous value before submission. I can't use the onchange event because the user may check multiple boxes before submitting.
View 3 RepliesHow to check weather the window is currently maximized or restored. I want to do something like if window state maximized then border none and if window state regular, then form border style sizable. This is what I wrote
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I am very new to this but i have with alote of help maked a program that comunicates with a relay board over rs232.
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In Visual Studio 2010 is it possible to check the state of variables during run time. When a run time error occurs the error is highlighted and you are able to mouse over different variables to see their values when the error happened. I would like to do something similar except without the error.
View 7 RepliesWhen DateTimePicker check state changed,ValueChanged and TextChanged events don't work always.
View 8 RepliesI am a C# programmer but dabbling in VB.Net because everybody else in my team uses it. In the interests of professional development I would like to shrink the following If... Else... statement.
If cmd.Parameters("@whenUpdated").Equals(DBNull.Value) Then
item.WhenUpdated = Nothing
Else
item.WhenUpdated = cmd.Parameters("@whenUpdated").Value
End If
I want to check the state of a certain key, but only inside timer event. So my sub will be something like.......
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
Need code here along the lines of an old fashioned... 'If Input="Q" then......"
End Sub
I'm not sure how to check for keyboard input except for inside a 'Keydown' event.
So what I'm trying to do is have a program read a text file and use the information to set which checkedlistbox has which check boxes checked and which ones don't.Here's the code I have so far (filepath is the string I use to determine what file is the reference file and is changed when necessary through a different sub routine):
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I have a DataGridView that has columns with a value type of boolean.To load the DataGridView, I load values into a DataTable then set theDataGridView.DataSource = theTable What value can I use in the table to load an intermediate check state?
Would it be better to use a check box control with a value than to use a column set to the boolean data type?
The check box is for display only, and will not need to be changed.
For almost a week I am reading and trying to find a solution for checking connection state using a TCP Client (using socket class) In my scenario I have a TCP Client that is connected to a server (it is not controlled by me) and i want that from time to time to check the connection state, and reconnect if necessary.I have read a lot of information on the internet but i did not find a suitable solution.Briefly, these are the methods that i have found on the internet and try to implement.But unfortunatelly, i have found some scenarios where the TCP Server is closed and the TCP Client is still saying Connected 1.Example from MSDN
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It looks like there is a bug in the DateTimePicker control, because I don't find any event specific for the changing the check state of the checkbox, only the ValueChanged event seems available. So that event should trigger every time the date in a dtp is changed manualy, or by choosing a date from the calender or when the checkbox in the dtp is checked or unchecked by clicking on it, the event ValueChanged should be triggered. But it doesn't do that all the time.
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I want to store true or false value based on the state of check box here is my insert statement, the problem is this this insert statement stores 1 or 0 instead of 1 or 0 i want to store true or false how to achieve this. [code]
View 3 RepliesI shtere a way i can loop the radio buttons on a groubBox and check which one of the 3 buttons have been cheked?
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i am trying to get this code that worked in VB6 just fine to work in VB.net 2008. It doesnt seem to want to connect (but has no error after it goes past the sockMain.Connect().
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I get the It doesnt seem that the server is running. Please check it and try again. error.
How can I use winsock in VS 2008? I can't figure it out..
View 1 RepliesI am doing my project in vs 2008 for WIFI transfer . We have to use winsock control to do this but in vs2008 there is no win sock control.Later we found that it is available in vb6.So i am trying to do in vb6.Can u assist me to develop coding to transfer data from one PC to another through WIFI?
View 1 RepliesHow do I properly add a Winsock Control in WPF for purpose of LAN applications? I tried adding the Winsock control dynamically but then the event functions are not available then.
View 1 RepliesIs this possible and how?Is it hard code or can i learn it?
View 1 Repliesi kinda need one.. i know how to make it work in vb10 by upgrading it from vb08, but i need to put it in a allread existing vb10 existing vb10 project, whit multitrheading.. so i cant use .net 2.0
View 9 RepliesI have project it use Winsock component if i take Open and Send Data in the same place it error
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How can I add winsock Control in my toolbox?
View 1 RepliesHow to add winsock listener in Vb 2008
View 1 RepliesI'm in college and I want to show my friend how to use winsock but for some reason, I can't add the Winsock control through references. Is there any way to load it through code?
View 3 RepliesI'm working on a server/client chat program in vb 2008 using winsock. I have a connection and can send data, but for some reason I can't receive data. [Code]
View 2 RepliesI'm trying to connect two programs using winsock, I connected it, but I want to send to the server to do some thing like open the camera . or do any thing .
View 1 Repliesi have a problem with my console in vb 2010 ! in windows form applications
we can use this event for winsock control:
i have added 2 winsock controls on form at server side and client side and used 2 different ports 1001,1002both winsocks gets connected i used condition winsock2.state=sckconnected and it shows that connectedi want that at certain time winsock2 will send data the timer gets activatedi put breakpoint on winsock2.senddata() in timer_tick() event the line gets executedbut at client side on winsock2_dataarrival() i put a msgbox() but it never popup
Server side-
vb.net
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs)
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I am making a chat program.
I use
Private Function winsock1() As Object
Throw New NotImplementedException
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