So I'm playing w/ WCF this week, it's pretty cool... I started with it to try to create a little GUI frontend to a service backend. Anyways I'm just playing with some more advanced things and ordered some books on it, but those are a few days away so I was hoping someone may be able to point me in the right direction for this.
Code:
Imports System.Runtime.Serialization
Namespace LoD.SomeNamespace
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I'm trying TCP communication using VB.NET and using the TcpClient method.All is working fine but I'm having trouble keeping my message seperate from each other.For example, my message have an header and footer and can range in size from very small (32 bytes) to quite large (64k). The problem I have is that when messages are being sent quickly they will arrive together. For example, if two 32 byte messages are sent they will arrive as 64 bytes. This is no good as I need to process them seperately.
So my question is:- Is there a way to easily separate my messages using a built in feature of the TcpClient so that the "reading" will give me the correct amount of bytes each time corresponding to the amount of bytes I have sent per message?
i would like to have a shared function in a separate class file to address the form location . but i dont know how can i get this to work. if i use this below code in my form its working . but i cannot move this to a class file.
Shared Sub Formlocation()
Me.StartPosition = FormStartPosition.Manual
Me.Location = Screen.GetWorkingArea(Me).Location
End Sub
I am using VB2008 Express and am curious how to send a command via RS232 communications. The string that I need to send is 02h PON 03h. The start and end bits are 02h and 03h.
How can I convert 02h and 03h to its ascii form. In hyperterminal, I use the sequence {(hold)ALT 0 0 2} on the number pad to send the start bit.
I am using this code currently without the start and end bits
Code:
I created a telephone number form where the user enters the telephone number in a text box as (nnn) nnn-nnnn. The first 3 digits in parenthesis are the ISD code, the next three are the area code and the last four are the local number. I need to separate out these three fields of the phone number and display in three separate text boxes labeled appropriately. Now, suppose the user enters the phone number in a text box as a continuous string of 10 digits, where the first three represent the ISD code, the next three represent the area code and the last four represent the local number. I'm lost as how to change this string into the form (nnn) nnn-nnnn. This is what I have
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I have a TabControl object on my form with many tabs created in code (TabPages) and my problem is that the same objects that are in the initial TabPage needs to be in the other TabPages created in code, I have this done in code when the user clicks the 'New Tab' menu option, however the same code is used for any new tabs created. The problem created here is that I have an event against one of the objects that appear in the other TabPages, but because the same code is used to create any new tab pages, the event will only work on the newest tab page, if that makes sense? By the way these objects that appear on the other TabPages are properties at the top so events can be handled against them in the respective subroutine.
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I'll get straight to my problem - I'm currently coding in Visual Studio.I have a table (countries) with the columns ID | Name. The table is filled with around 28 records.I also have a form with 4 combo boxes (set up as 1,2,3 & 4) that I want the user to select. These combo boxes will display the names from the table countries. I then want to use the selected names in the combo boxes to Insert into their corresponding ID into another table. For example England would have the ID 1, USA the ID 2 etc.So, is it possible to have separate combo boxes that will give separate ID values but using the same table? At the moment I can't seem to find a solution.Eventually the form will have more than 4 combo boxes so I don't want to use separate bindingsources for each combo box.
View 5 RepliesI have a class like this:
[Code]...
It works, when I make getBar methods public, but I don't want to expose these unneccessarily. Why I can't call private shared methods from a public one in the same class is over my head. I'm using .net framework 4.0 in a web application.
I've taken over the maintenance of the website (ASP.NET VB) and on one particular page I noticed the below code
Inherits System.Web.UI.Page
Public Shared UserNumber As String
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
[Code]....
My question is whether the variable UserNumber can be accessed or changed by any other user than the current one?
Given in the following language specification, for me at least, calling Db.Foobar() [In the following code] does not indeed call off to the Shared Constructors of the base classes. I am curious as to a) is this my own fault for doing something wrong or b) is this an error in the language specification[code]...
View 2 RepliesI have a few forms that have a lot of really intensive updating along with a great deal of user interface (text boxes, button clicking etc) Is it possible to open a separate form as a separate UI thread from the start up form that called it to "show" or open or whatever the new method might be?
View 6 RepliesI seem to be drawing a blank. I'd like to create a "shared" variable that is shared with all instances of a class but not classes that inherit from it. For example.Class A: Shared list As New List(Of String): list.Add("A")
Class B Inherits A: list.Add("B")Class C Inherits B: list.Add("C")The end result I'd like is that any instance of A has just A in the list. Any instance of B has A and B in the list. Any instance of C has A, B, and C in the list. I can accomplish it by creating Instance variables, but I have to construct the list for each instance of a class. I'd like to construct it once for a specific point in the Hierarchy and then share it accross other instances of that class.
I am trying to add shared members in derived classes and use that values in base classes...
I have base
class DBLayer
public shared function GetDetail(byval UIN as integer)
dim StrSql = string.format("select * from {0} where uin = {1}", tablename, uin)
end function
end class
[Code]..
currently there is error using the tablename variable of derived class in base class but i want to use it i dun know other techniques if other solutions are better then u can post it or u can say how can i make it work? confused...
is there a difference between shared events and non-shared events?
Private Shared Event EVENT_something_changed()
Private Sub SUB_handles_something_changed() Handles Me.EVENT_something_changed
End Sub
no errors with this code, but how is Me possible since the Event is shared. it seems like there's no errors between switching shared with un-shared and switching Me with Myclass, all 4 combinations seem to work, isn't that weird
I got a piece of code that I have to use as a class. It gets added to the project every time, the accessed from the code of the forms.
It is for ethernet communication to an industrial radio.
So right now it's a just a class called MK
Question:
Is it possible to compile a class into a DLL which then can be just referenced to each application?
I see it often declared in front of main functions and after reading the MSDN comment on the matter, it's purpose still eludes me. As far as i can understand it has to do with setting the program into some form of multithreaded state. But what does that even mean?When should I use it, why should I use it, is it even currently relevant becouse i read somewhere that the default apartment state is MTA nowaday's What's it's purpose mister Anderson ...
View 1 RepliesHow can I target a Adapter I have on the machine and Tell through windows API if its a Wireless or Hardwired Ethernet Adapter? I really want to avoid doing anything real High level like piping Command prompt text XD.
View 2 RepliesI am writing a utility and using the ftpwebrequest. I am wanting to add a progress indicator to help the user know about how much time is left on the upload.
Code:
Private Sub UploadFTPFile()
Const filePath As String = "C:"
Const fileToUpload As String = "1.txt"
Const ftpServer As String = "ftp://xx.xx.xx.xx"
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I didn't make this code but can someone explain to me how to add more than one client to communicate to add to this code?e.g 3 people to talk or is it not possible?
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The &H30D? i know its a hexadecimal value and may represent a message but i cant find anything about why someone would need to use one, and not just "As Integer = 703". I've found nothing in the VB.NET library or windows messages/functions docs.
I am trying to build an IM program i found one (see attachment) but it is network only and i want to build one that goes over the internet?
View 6 RepliesCan WCF be used communicate through the internet? All the examples I have found show it being used on a local network.
View 10 RepliesIs it possible to read out the contents of a page that has already be loaded into a webbrowser...say IExplorer...? On 'normal' windows programs there is a way to externally control a program and its contents. But on a page loaded in a webbrowser i can't find a way to get external control of its contents and buttons ect..
View 1 RepliesI am sending data to some microchips with a serial port control using:
Code:
well, it work up to the value 9, but anything with more that one decimal place sends a byte value of the rightmost digit. So, 16 in the text box will send 6. Basically, it appears to be sending just 6, or 1 followed by 6. Is this how the serial port sends data...one digital at a time? Or, is the conversion to a byte failing?
Is there any easy way to determine the IP address for the computer that an app is running on. I looked through the System.Net namespace and didn't see anything of the sort.
Basically, I want to display the IP address to the user, instead of walking them through how to do an "ipconfig". They then can put that IP address into another app, so the one app can talk to the other via UDP.
I am trying to make a cnc program i have learnt a little about g-code i want to know how i can generate g-code from an image? Also how i can use this g-code in my program in vb to move motors?
View 1 RepliesCode:
Private Function web_scan(ByVal code As String) As String
Dim myReg As Net.HttpWebRequest = _
DirectCast(Net.WebRequest.Create(ServerSelect.Text & "/scanner.php?code=" & code), _
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I need to give a variable to php file via GET and recive responce. HttpWebResponse dosen't work on my PocketPC so I need n alternative.
I have this code to connect to my server:
client = New TcpClient(txtIP.Text, txtPort.Text)
client.GetStream.BeginRead(readBuffer, 0, BYTES_TO_READ, AddressOf DoRead, Nothing)
SendMessage("/CONNECT|" & Label25.Text)
[code].....
I simply want to be able to delete a file via ftp. What irritates me is, it is so easy to upload a file but so much harder to delete a file.
way to delete a file over FTP using visual basic
I would like to turn of this exception in the debug menu but I am not sure how or which one to uncheck or check.."ObjectDisposedException was unhandled"
View 6 Replies