Make Multi-user Application (database)?
Dec 7, 2009
how 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. @_@..
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Mar 10, 2009
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.
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Apr 11, 2009
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.
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May 11, 2011
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.
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Jul 25, 2007
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.
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Jan 28, 2011
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...
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Aug 26, 2009
I 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?
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Sep 18, 2009
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.
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Feb 19, 2009
I 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.
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Jul 29, 2009
I 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.
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Mar 2, 2009
give 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?
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Aug 8, 2011
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.
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Jan 8, 2010
Someone 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.
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Feb 19, 2009
I need to create a multi user VB.Net application that connects to Access 2007 and has 2 forms. How do I go about it?
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Mar 26, 2009
I'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]...
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Sep 17, 2009
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?
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Apr 6, 2011
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]...
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Apr 27, 2012
I have been using access for my applications from over 4 years now. I realize its time to move on now and i need suggestions for a new database. Here are my requirements :should be able to connect it with Vb.net windows form frontend GUI - all database functions such as add/delete/edit/update will be done through the vb.net front-end only.Should be able to place the db on LAN and each client on the LAN can then access the centrally stored db through their individual front-ends.At the most 5-6 users will be reading/writing to the database at the same time , so the database should not crash or slow down Since i come from MS access background, i would like something thats similar to it so that i can learn and adapt to it quickly.Not very important, but i think its worth mentioning. This db will be the main central db for my .net application.My .net application will also be interacting with quickbooks and magento via some apis but ultimately all this data will go to the central db. So just curious, will there be any compataibility issues with the database that you suggest Should handle about 10 tables and around 10k records in each table Should be secure - just that i should be able to lock it up or anyhow prevent it being accessed from anywhere else other than the vb.net front-end.
Lastly, I would prefer it to be free to use if possible but not essential. I realize there are some topics like mysql vs sqllite and on databases, but pls understand i need suggestions for one that will be apt for the purposes i have listed above.
Edit : Just curious - Would i pushing the limits if i still stick to access - i understand access won't be good for multi-user access but i guess 5 users is not much ?
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Apr 7, 2011
Our engineers use an application developed internally to perform risk assessments at a customers site. Sometimes on larger jobs a group of engineers will all carry out risk assessments together and will all need access to a single database file to all work on at the same time.
[Code]...
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Mar 17, 2009
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
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Jun 2, 2011
I want to learn the Database application programming. Especially, the multi-user environment. User can update the data at the same database. So, could you give me some advices ? Does it should use SQL server db ? How to connect with the the SQL server from other PC user ?
[Code]...
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Jul 10, 2009
I'm building a multi language application, but in the application, there will be some data that will be retrieved from the db. In the db I have two tables (Access Groups, Teams) the two tables are related, there are some groups, that have teams, example (sellers can belong to team 1, team 2, team 3...). The data that will change it's the names for the access groups and the names for the teams. The only way that I can think to do this, is to have the different values for all the languages in the code, or some auxiliar file, and when loading the application I'll truncate the two tables and fill them with the current language values. By the way those values never change...
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Feb 22, 2011
im making an application in vb.net (duh!) anyway i have created and coded the whole project and it performs exactly as i want it to (i dont need code help). my problem lies with the fact that my project is 2-3 parts
1.a setup form that gathers inital data about the enviroment stores this data encrypted in a config file. after inital setup this form is not displayed again. but needs to be run on both computers
2. the second form is the real application form im in the process of turning this part in to a background service anyway this form is the one that establishes the connection between two nodes it works correctly
3. the config files
anyway here is my problem i want to make this application distributional with just one file the (.exe) and have this .exe make everything else happen. it runs the setup form and creates the first config file which it does then it needs to produce a copy of just the second form and the config file to transfer to workstation #2 that will run independtly without the whole application which i cant make happen then it needs to turn both workstations application on by only starting one on either computer and invoke the other computer to start its corrosponding app also no idea how to make this happen any ideas or suggestions as to where to look to try to find my answers.im thinking i might need to make two seperate applications (a setup app, and the running app) and include them both in a project and use the setup.exe to to package them together this is a little side project that im making for my self to use to make programming a little easier so i plan on giving it out to some fellow students to test and tell me what they think so im not really worried about ease of use or complicated procedures yet but if it turns out to work and actually be of use to anyone else i would be willing to rewrite it to distribute to the masses but for now i just want it to work for me.
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Jan 20, 2011
In vb.net I am using password protected database with following connection stringconnetionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:vaivaiDB.mdb;JetOLEDB:Database Password=secret;"Database access works fine on the development machine.
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Nov 6, 2010
how to make a multi language desktop application in vb.net 2005. only a small desktop application in which i can change language according to countries.
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Dec 9, 2011
I am trying to make a application that will bind User Desired Keys to User Desired Text. This is what I have done so far, it is not very much but it keeps crashing and visual basic is not telling me anything is wrong with it. I basically just want the user to be able to select a hotkey from a combobox. [code]
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Apr 8, 2010
i need to make a database application that can write/retrieve cells/datasets from/to a database i buyed a book in there was an example of how to create a database application while debugging i had the "Object reference not set to an instance of an object." error and it highlighted this code
objDataRow = objDataSet.Tables("KlantenTable").NewRow
now the problem is here i declare something later in the code i write to it
objDataSet.Tables("KlantenDataTable").Rows.Add(objDataRow)
[Code]....
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Dec 6, 2009
I'm trying to make an application where a user Must login before using the app. The application will have an encryption so people can't easily hack into it.
But I've only gotten this far Connecting to a database ( opening the connection )
This is my code
CODE:
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Mar 5, 2012
I use vb.net express 2010. I have tried to find a way to add an EULA to my project but have not found it (nor any solutions online).
does express have the ability to add an EULA?also is there a way to get the setup file to move the database into a particular area OR have it make a new database where the user selects?
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Dec 21, 2009
you tell me how to make a ClickOnce Application Start when A User Logs on? I am running Express so I cannot use the Installers in the full VS. I would like it so it will only add a shortcut when it is installed. (Application is available offline)
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