I am developing a VB.Net application. That application might be working on a LAN. MS Access as a backend will be used.
I have developed many single user applications, but don't know of multi user , LAN, manage DB etc. How do I make the program as Multi user on LAN. Data will be accessed at the same time. How to mange such things.
I have finished coding a VB.Net application that has connection to SQL Express 2008 database. My question is, what steps do I have to take to make this a multi user application.
FYI:There are 3 tables in the database of which two tables contain data to be viewed by the user and one table is to insert records by the user. The former two tables will be edited by the administrator only. So there is no issue of concurrency. But the one table that is used to insert records by all users has to be dealt with.
I want to about a multiuser application that have a server and 2 or 5 client to interect with mssql thorough application. how multiple cleint connect to database in same time.
View 4 Replieshow to make an application with a multiple user.
language: VB
resource: Visual Studio 2008 Pro(90-day trial)
Sql express (the packages when u download the VS 2008)
scenario: i will make database located in a server (LAN) and a multiple client that can access the server database to add,modify,delete records.Im not aware that building a multi-user application database is different from a normal one user application database. T_T.i read some guide and other walkthrough on building a database but it became confusing when it doesnt my requirements. coz when i try to open my database(.mdf) to connect from other client (in another station) it says its currently in use and connot connect to it. err. @_@..
How do I make a Multi User CHat Program in Visual Basic Express Edition? I kind of want it like (Server) and then everybody whos a client connects to the server.
View 3 RepliesI am designing a fairly small application to manage a waiting area for a clinical department. There will be a receptionist who books appointments and updates exisiting appointments to say that a patient has "Arrived". In seperate rooms will be nurses who call patients who have "Arrived" and update the appointment as "In Session" and finally as "Discharged". The appointments are viewed in a flexgrid with nurses across the top and time down the left, patient names are displayed at the relevant times and the cells are shaded a colour to represent the current appointment status ("Booked", "Arrived", "In Session" and "Discharged").
I am using SQL Server as the back-end and Visual Basic 6 (I know) as my front-end.I have been told that there will be 2 or 3 nurses plus the receptionist logged in to the system but I would like to cater for growth.My question is what is the best mechanism to use in order to reflect the status change made by one user on the screens of the other users currently logged in?
I have been thinking about using a timer to refresh the data at a set interval but I do not want to keep hitting the server excessively (although what is considered excessive? we would be talking about a call for data every 60 secs per user). Plus the server could be serving data for many other applications so this is another consideration.Alternatively I have been thinking about sending some kind of message via Winsock to the other users notifying them of data changes as they happen. I don't have a lot of experience with this and am concerned about clients not receiving messages and users seeing old data. It also seems strange to me that once the days appointments have been retrieved from the database that "in theory" a client could go the whole day without having to query the database again to pick up changes - kind of scary.Some information on the data:We would probably be looking at around 100 appointments per day We capture patient name, date of birth, date and time of appointment and appointment status.What is the standard approach / best practice for this kind of scenario?
How do I make a multi user database?
Give me the logic, how do I achieve it?
For example, what file should the database be, where should I put the database(I prefer on my server), how do I encrypt the database.
Can I make it in columns? Username column and password column? My application then finds if any username match to the username inputted by user in my UsernameTextbox.Text then see if the inputted username and the password from PasswordTextBox.Text matches.
For now I'm using the If statement for both username and password. I have to write the same code again again for new users.
I am new to programming. I know how to create simple windows app using VB and Sql Server/AccessDB. My question is this: Can my windows app be ran on a LAN or do I have to create a special multi-user app for a LAN? If the answer is yes, can someone please guide me on how to create a LAN/Multi-user app.
View 2 RepliesI need to create a multi user VB.Net application that connects to Access 2007 and has 2 forms. How do I go about it? Please give me a start up.
View 6 RepliesI have been trying for years making a network app.I need linked to a video or something, mainly on msdn or some microsoft site, because youtube created videos for coding aren't all that helpful as most of the microsoft made videos.
I need not linked to things like multi-user tcp chat application, as i have looked at these, and even found no code solution, but the no code doesn't allow too much customization and hard to deal with data received to make your own commands send and receive and have events for them.
The multi-user tcp chat application, it doesn't explain anything, just gives you the code for you to look at, and well, it's hard to understand.
I WANT TO MAKE THE PROGRAM BEFORE MORE YEARS PASS BY.
i just want some opinnion or suggestions regarding database softwares. we are going to develop a system for 20 or less users, i am planning to use MYSQL community server as our database to lessen the budget for that system, i just want to know if it is ok to use that version.is there a big differece between mysql community server, enterprise server and MS SQL Server in terms of handling data i.e security, speed, etc...
View 2 Repliesgive me some example code to insert rows of datagridview into a sql express database table? Also, how do I manage concurrency as it is a multi user application?
View 6 RepliesSomeone gave me a link to a Multi-User TCP Chat application once, but, there is a flaw in it, where it wont do special characters, such as Alt+1 will become a different character to the server than the one that was sent. Even I tried to see if the output was usable but it sees it as multiple chars, when it is only 1, and I can't find a link between what it sends and what the character is, so I can't just tell it based on whats sent what the char is, because I see no relation, I would have to type it out for each and every special character.
View 2 Replieshow to create a multi-user chatroom program. I don't have the server, but I have got a web hosting. I want to know how I can connect to the chatrooms by connect to my web hosting using with httprequest?And also, I would like to have code to allowed me to send the users private messages, ignore the users and kick/ban the users out of the chatroom.
View 10 Repliesdo this??& can I make a Main server like this?
View 1 RepliesI need to create a multi user VB.Net application that connects to Access 2007 and has 2 forms. How do I go about it?
View 4 RepliesI'm using SQL 2008 Express with a multi user VB.NET Windows application. Do I have to add each user to the SQL user account? Does NT AuthoritySYSTEM work? I do not know how this works. So far I have NT AuthoritySYSTEM in the Security-Logins of the Server. But do I have to add it also in the database? In the databse Security-User, I have the following:
[Code]...
I have developed an application using vb.net. This application will run on approximately 15 machines at the main office and also roughly 10 machines spread over 3 different locations. I am using SQL Server Express edition in the backend. I deployed the application on the network using caspol but it is extremely slow. The Company Manager's perception is that because a script will invariably have to be deployed on each client machine to configure CASPOL, that the solution is not viable.
What is the best method to develop and deploy a multi-user desktop application?
I've been trying that example application at [url]...
I'm just using the client part to connect to an exiting server application. It works OK up to the point where it appends text into the[code]...
I'm working on a multi user VB.Net windows application with back end as SQL Server 2008 Express. The SQL Server is installed on the intranet network drive. This is the connection string I will be using. Is this correct?
Data Source=.SQLEXPRESS;AttachDbFilename=Q:DatabasePrintDB.mdf;Integrate d Security=True;Connect Timeout=30;User Instance=True
I have a little Windows Form application that uses sql database.My application works on my computer, but when I install the app to another computer I get this errorSystem.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was noccessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
View 21 RepliesI need to write a program that uses 'try' in it
the program can only accept a number if its bigger than 3 otherwise it would give a error message and return to the start of the [code]...
I completed my VB project a while back and it worked great in XP.Now the same program is needed on computers that have Win7 installed.The program installs without any problems, but when I open it, it gives me an error saying the database is not accessible.
I used Visual Studio 2008 and SQL Compact to design the project.The database was included in the project and in the installation file. I also checked the Programs folder and the database was installed correctly into the correct path.What is the problem with my programs compatibility with Windows 7?
I have to create a program that ask the user to enter the amount of hours work for 5 diferent projects in textboxes. The user have to enter the time he worked in minutes. Ex: 153, 280, 600, 130, 20... The total then is out putted into a textbox in this format "13 Hours and 35 Minutes" I'm having dificulties making the conversion and the separation from hours and minutes. I understand that the total is divided by 60, but if we fallow the above numbers the total hours comes out to 1183 / 60 = 19.71. So I'm having problems with the .71 mnts or digits... so from this total I have to output the total of in this particular format: "19 Hours and ?
View 2 RepliesI'm trying to get a VB2008 multi thread application working that connects to a local server program using sockets. Server requests for this particular system can be more quickly handled by a number of connections, so I've written some code to run any number of data request threads that I choose. The problem that I'm having is that the data returned from the server is getting mixed up and is often returned to a different thread/socket than the one that requested it. Other than that, it seems to work okay. If I use just one thread, then the system works as it should. Pls. see incuded code, which is heavily edited to remove all the other fruit salad. Is there any way to set up the sockets so that data returned to the socket/thread that requested it?
Module StaticDeclarations
Public WithEvents g_SD As New SocketDataClass(New MainThread.MTCallback(AddressOf MainThread.MTResultCallbackSub))
Public WithEvents g_MT As New MainThread(New SocketDataClass.SDCallback(AddressOf SocketDataClass.SDThreadResultCallbackSub))
[code]....
I followed the Quartz manual to the dot and still I'm not sure why it isn't picking up the GetDeal.vb (Quartz job) in Global.asax. It never went into the _scheduler.JobGroupNames and _scheduler.TriggerGroupNames loop as follows:
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
Dim factory As ISchedulerFactory = New StdSchedulerFactory()
_scheduler = factory.GetScheduler()
_scheduler.Start()
[CODE]...
I've attached a link to download my Project here. how to make it work?- [URL]
From all the chat applications I successfully made each and every one of them required me to port forward my router so that the data can be received. Now my question is how can I make my chat program work on computers that have routers with most of the ports blocked, how do traditional chat programs do it? Perhaps The chat program intercepts packets then sends it to a known port such as 80?
View 17 RepliesI know how to make a setup wizard but when I install my program on other computers, I get an error (SQL Error).
What do I need to install on other computers other than .NET Framework and my program ?
I'm using vb2008 How can make the application work(load) when I open my computer?
View 4 RepliesCreate an application that allows the user to select or enter into a combo box the number of days a person will work, and calculates the total amount of pay she will receive over that period of time. Salary is one penny the first day, two pennies the second day, four pennies the third say, and continuing to double each day.
The combo box must list the following items: 30, 180, 365, and 1000. Must be the default drop down box. Use a validating event procedure on the combo box.
The program should go through a loop once for each day, doubling the number of pennies with each iteration of the loop. You will need a running totl of the number of pennies that you add to with each iteration. To calculate the total amount of pay, multiply the total number of pennies by .01 and show the result in currency format.
Public Class Form1
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
[CODE]...