where i need to start to create "Online" (or transfer data / sharing data /Transfer information ) program?
I mean that two or more different computers with the program can connect with each other ... Like Chat, Online games, etc..
Whats your preferred method of sharing information between user controls? Information stored in variables (strings,arrays, list of etc).
View 12 RepliesI am working on a program to integrate several entities of people to get them to work together by sharing information.I am having.I am using a database (Access) in which I can upload photos but can not understand how to store PDF and word.Also looking into implementing email.User inputs information on the forms with the attached (in datastore) PDF and word files and with one button email multiple users in certain areas.I can figure out how to code the email to: portion.Looking to be able to open a chat type interface. I understand I use the winsock com but I do not have it. Does anyone know what the heck this Adobe Breeze thing is?
View 2 RepliesI currently have two programs that need to comunicate one with another. It doesn't have to be something complicated, it's just passing data from one to another, all very simple. I was thinking of using .net remoting, but I've heard there's a new thing WCF. Should I go for the .net remoting or try WCF? Or is there something simpler to use?
edit: Both applications are simple, I don't want to have anything to do with IIS, services and such.
I am working with several RFID readers that perform different function in my vb.net program. Currently each reader port number is hard coded into the respective form. For example, reader 3 operates on COM1. However, this will be problematic when installing on different machines.
What I would like to do is have a "configuration" form where the user can select each reader and then select the COM port. Then all other code references these settings. What would be the best approach for this.
The only way I know to do it currently is to place this information in a small database and then have the forms reference that database, but it is a lot to do for such a seemingly trivial task.
I am in a VB programming class and I am having an issue with a program that I created. The focus of the program is creating a class to do calculations and sharing the data with a form.
The problem that I am having is with a certain piece of data that is shared between the class and form. To be more specific, it is two check boxes that each have their own variable as boolean, done as a true/false if checked/unchecked situation.
When I step through the program, somehow the values get changed entering the class for calculations. For example if it was true, false, it comes out as false, true when the class accesses the data. There are other variables and data types that get pulled but these are the only ones that are being altered.
I have done programs in the past with VB6 using the winsock control to receive data to be processed. I would like to do the same thing in vb.net but I am having problems. I have done numerous searches and consulted numerous books and articles, but haven't found the best approach for accomplishing the following.
I would like from 1 to 20 clients to be able to send a string to the server to be processed. It would be nice to if the clients could connect to same port and use async processes to open/accept more connections. One of the books (Visual Basic 2008 Recipes) has a recipe for creating "Multithreaded TCP Server that supports Asynchronous Communications".
I am trying to base my program off of that example and modify it for my application. The problem I am having is how to share data with the Main form and the classes that handle the communications. The TCP class has two classes contained in it. One class for listening for connection, beginning the accept client and the other class (clienthandler) for completing the connection and getting the data. I would to be able to get the data from the clienthandler class and post on the main form. I have trying to have a public property for the data but I think my confusion comes in because the clienthandler would be created new for every new client. The mainform would not know how many of the new clienthandlers were created etc.how get the data to the main form and clear the data when done. I have even considered putting data into MSMQ and having main form pull data out.
I know a little about threading and delegates, as well as socket programming. I'm working with a VB.NET-compatible SDK called TrueVision3D to create a small online game for me and my friends. The problem is that I cannot for the life of me figure out how to pass data from one thread to another. I've created 2 seperate threads on seperate forms.
The first thread is created on a form titled FrmLogin, and it contains all the socket code. I need to be able to update variables in the second thread, which mainly consists of a render loop. The second thread is created on a form titled FrmMain. I'm not quite sure if it matters what forms the threads are created on, I'm just trying to give as much information about the issue as I can. I've tried using delegates and events to pass information from the thread back to the form it was created on, which works fine, but how do I pass data to the second thread from the first?
I have two forms A and B. B is a child of A - i.e. I have a button on A that pops up form B. I want B to be able to access and change data (e.g. an instance of an object etc.) in A and also to call some function in A. At the same time I'd like to preserve the right to alter the data in A without opening B. I've achieved this using the following (i.e. by declaring the object and method as Friend):
Public Class frmA
Friend _data as Hashtable
Friend Sub GetData()
If _data IsNot Nothing Then
_data As New Hashtable
Is there anything inherently wrong with the what I've done and if so how can I achieve a similar result? (It seems to work - I can read, add to and change the values in the _data Hashtable from within form B and when B is closed the values persist i.e. I can access the changed values from within form A. I just dont know if its a horrible fudge).
I am sharing databinding when opening a detail form a summary form. The data is shared fine. What I don't know is how to save any data that may have changed, or to create a new record.[code]...
View 2 RepliesI have a PC with sql server 2005 express, my application works with it great, is it possible to install another copy of my application to a laptop that will move around and wont have access to the data all the time. trying to find something like SQLCE has(RDA)so it can see the data make changes and when it returns it submits all the changes. Is this possible and how can it be done.
View 6 RepliesMy question is in two parts:
1) I am writing an application for a touchscreen which will have several different Forms - each of which will be full-screen. What is the best way to achieve this? Hide/show each Form as the user navigates between screens? MDI Parent with multiple Child Forms becoming visible 'on top'? Or is there a more elegant solution?
2) I would also like a 'banner' on the top of each Form (or always visible on the top of the MDI Parent, etc) similar to a 'navigation frame' on a website. This banner will display a clock with the current time, and the current GPS location (meaning that a Timer will be used to get/set these values every 1000 milliseconds). I thought of using a UserControl for the banner - but if this is used on multiple Forms then I will end-up with multiple Timers all waiting 1000 milliseconds to update essentially the same information.
Is there a best practice for this type of scenario? - my thoughts so far are using the "Main" Form for Global Timers, etc - but then how do I update all Form clocks each second? (without iterating through all visible Forms... which seems messy).
I am building a code library to be used by a 3rd party developer. Neither my code or the 3rd party have any UI controls involved. It's purpose is a combination of providing the ability to look up information from a database while at the same time polling it and throwing events when a set of conditions are met. Naturally the only way it's going to be responsive to the 3rd party library's commands is via multithreading since everything in a single thread stops once you start polling the database.
The sub I am using is part of an object that I create in the main thread and attempt to have it run via a thread, when a condition is met I have it update a property in that object, throw the event (or execute a callback in my latest attempt) and then attempt to have a simulator for the 3rd party control read the property.It's easy to setup the multithreading part, the hard part appears to be throwing the event so it is seen in the original thread and the data is available there. Any attempt to do this generates a cross thread error when the data is read.
I attempted to use delegates and calling methods asynchronously and using the callback function but still get cross threading errors.Is my only possiblity to use a background worker, using either the progress changed or runworker completed events? Even then am I going to be able to set the property in the function from one thread and read it in another?
I have a windows forms application with one exe and several dlls(Class libraries) in a single solution. The application uses common data that is used across all the dlls. I would like to load the data when the application is starting up and use the loaded data at various points in the dlls so that I do not have to load the common data again and again. How can I share the data loaded in main EXE across the DLLs?
View 2 RepliesI am in the main process using Activex EXE to create a sub-process, Activex EXE project inside a class module, class module which there are two instances of the event the equivalent of two threads, I defined the standard module module1.bas as public variable a, in two instances running at the same time, how the definition of public variables are not used, such as a private variable, each carrying out their respective variables of the same name! For example the implementation of a = a +1 statement, let the first instance of a run, a steady increase from 1; when executed when an instance of 2, a should be an instance of a value when the two began to increase, but also from two examples of 1,2 , ... began to increase.
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I will use the Background Intelligent Transfer Service (BITS) to transfer files from a client (laptop) to a shared folder on a server within our local network.The problem is a very slow network bandwith, if we transfer a file, the other clients canīt work, all requests to other clients (application) or viewing internet pages needs a long time.My idea is to use BITS in my tool to copy/transfer a file from client to server, also I hope to get more performance for the internet requests.
View 2 RepliesI have 7 variables and i need to transfer them in a dataset I have already create the file with extension .xsd and i have already a report file .rdlc I see the Dataset "DataTable"in my rdlc file but i can't see any field It gives me error of "No Dataset is Linked to the document" From the other hand it sees the dataset in the selection dataset
View 1 RepliesSo, I'm making a log in page for 'student'. I've two forms. 1) frmStudentRegister 2) frmStudentHome
in frmStudentRegister page, student will enter his first name, last name, email, major etc and will create his profile. When he clicks on 'register' button, the information he entered on the text box will transfer to the second from frmStudentHome.
I've this codes:
lblFname.Text = frmStudentRegister.txtFname.Text
lblLname.Text = frmStudentRegister.txtLname.Text
lblEmail.Text = frmStudentRegister.txtEmail.Text
lblMajor.Text = frmStudentRegister.txtMajor.Text
But when I debug it, frmStudentHome won't show those entries. It's just blank !
I have a sequence that reads the selected Excel-file and displays the first row of the columns in the Excel. (The first Excel row has the column names)
Dim cmd As OleDbCommand = New OleDbCommand("select * from [" & tableName & "$]", MyConnection)
Dim dr As System.Data.IDataReader
Dim dt As New System.Data.DataTable
dr = cmd.ExecuteReader
dt.Load(dr)
With the above code I can read the the first rows of the Excel table and choose the names of the columns I like to keep. (By populating the first row to my ComboBoxes)
So, at the moment my DataTable dt has all the table header names but on the first row. And as the header names it has F1, F2, F3, ... F13.
How can I make my new DataTable dt2 take the first row of dt and make it the column names row? How can I choose which columns do I want to transfer from dt to dt2 ???
I have tried the following (Doesn't work):
Dim dt2 As System.Data.DataTable
dt2 = dt.Copy.Columns("F1", "F2", "F3", "F4")
DataGridView1.DataSource = dt2
I am working in Vb Express with MsAccess as database. I have a form with Listview data from Listview is transferred to the TableCustomer it is retrieved from that table back to ListView and after some additions is stored back in Tabloe Customer.I have another table Transaction in the same database which has some common fields of Customer Table in addition to its own fields. My two questions are :. How the data of one table can be automatically transferred to other table in MsAccess?
View 7 RepliesI am developing a windows app and i have a form in which i have 2 datagridviews..
dgv1 is the main gridview with checkbox column and when the user checks the box, that row should be visible in dgv3 (other datagridview)..
The code i used is :
Imports System.Data
Imports System.Data.OleDb
Imports System.EventArgs
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can any one tell me how to transfer data through gprs to a oracle server using vb .net
i am using this coding below
IPHostEntry ServerEntry;
TcpClient Client = new TcpClient();
Stream SocketStream;
Byte[] InputData = new Byte[256];
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i have a form with two list boxes and two buttons to transfer data between the list boxes.one button is the add and the other the remove. some code for these two buttons?
View 18 RepliesI'm currently working on a simple Jeopardy game in visual basic. My selection choices are made from picking the proper radio buttons. Questions is; how do I connect the two forms (form_1 & form_2) so that is will show the proper points after answering a question? I'm using lbl or txtbox for bank total after each question.
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles Button1.Click
'contestestant "Max" choice
If RadioButton1.Checked Then
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Basically I want to take My Client.Then for example Lets say in my client I have "A = 1" Then my 2nd file which has random data in it.So Client= My Client File = The File which I want in the end result
How could I Inject "A = TextBox1.Text" from Client to File.I heard it's called "End Of File" or something like that.
I am trying to transfer data from one subroutine to another. This is not working "ByVal J(1) As Double, ByVal Max(2) As Double".
Private
Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
...code
Call Data(ByVal J(1) As Double, ByVal Max(2) As Double)
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i'm working on visual studio 2005 vb.net language windows application.and i'm using MS access database with 2 tables customers and stopped. i have a form that the user will enter the IP and the stop date and when i press the button stop i want the all fields that r related to this IP to be transfered from customers to stoppedi wrote this code but i'm getting syntax error but i couldn't recognize the error. please i need help and how to slove it. this is my code:
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is it possible to transfer data from whithin vb8 programe to excel continiously
in the same book?
I want to import a portion of an XML doc into a DataGridView. Is the easiest way to do this to read the XML into a DataSet using the DataSet's ReadXML Method? Secondly if I did not want tranfser all the data from the XML but instead wanted to cherry-pick the element data, what is the best way of doing this?[code]...
View 7 RepliesIs there a way to transfer huge amount of data in a single shot from vb.net to Oracle database? I have a couple of thousands of records in my vb.net code which I want to update to Oracle database. What I do currently is, call a stored procedure in database once for each of those records. This would end up calling the stored proc couple of thousand times, which is highly inefficient.
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