Sync Data Between Two Instances?
Sep 13, 2010
I have a small "Clinic Application" that runs on two machines. (Receptionists & Doctors)
Same application is installed at both the computers, and they access the same SQL Server 2008 Data at a 3rd macine.
When the application is started, the local datasets are filled with the data from the 3rd machine (using tableadapter.fill).
Whenever the Receptionist adds a Patient in DataGrid,and saved it, it should show in Doctors DataGrid. and whenever Doctor adds something, the receptionists dataGrid should show it.
to accomplish this I have set a timer that keeps Filling datasets.
the task is successfully accomplished, but....
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Nov 10, 2009
I have a windows application and a php web application(not connected to internet all times), eventually data add/remove/update can happen at either places. So data has to be synchronized every day or manually.
I have a small sqllite database file (less than 500K) in my end, and the php web app uses Mysql, the structures remain the same. I would like to have a update function in my windows app, which sends my sqllite database file directly to my webserver and then1. Php should read values from the sqllite database files insert some values into mysql from the uploaded file 2. Php should read values from the mysql database files and insert them to sqllite database file
and finally send them back to my windows client pc. I would like to use .net 2.0.Anyone has an idea to get the above done or a suggestion to make the sync easier will help me a lot. Give me light on how the architecture or design should be done to achieve this
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Mar 20, 2011
Using VB.Net, I need to read data from a Microsoft Outlook 2007 PST file and an external database, and sync the two sources.Past posts on SO mention Microsoft.Office.Interop.Outlook. I was wondering if VB.Net developers had successfully used this to work with Outlook, or if there were other solutions I should try instead.
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Jan 24, 2011
VB.NET 2010, .NET 4. I am working on an application for controlling an industrial machine composed of many devices attached to the computer. Most if it is reasonable straight forward, but I'm having trouble thinking about the RS-232 devices. One of the RS-232 devices is a fancy power supply with many functions. The ones that are relevant right now are voltage read, voltage write, current read, and current write. The design pattern I'm trying to implement is one in which each attached device is represented by an object that has methods for reading/writing etc and properties for things like COM port etc.
For this power supply, clearly the Port reference should be shared among the instances, so I have a base class (say, PowerSupply) with a Protected Shared Property Port As IO.Ports.SerialPort. Then I have a couple classes that inherit from this class, PowerSupplyVoltage and PowerSupplyCurrent that each define read/write methods and properties for holding the last read/written values. My issue is in parsing the response from the power supply using the Port.DataRecieved event on the shared SerialPort object. The protocol the power supply uses specifies what data it's sending in each response packet.
So, basically, it might say something equivalent to "The voltage is 100V" or "The current is 1A" or "The voltage has been set to 150V" etc. I'm trying to parse this in a shared function. Only during the parsing process would I determine which instance's read/written value to update. I can't access the read/written value properties of the instances from within the shared function. The best I could think of is creating some kind of PowerSupplyCommunicator object that would maintain references to PowerSupplyVoltage and PowerSupplyCurrent instances along with the shared Port and DataRecievedHandler functions.
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May 30, 2012
I have a class that sends an email which i use sendasyc
SMTPServer.SendAsync(message, _message_id)
The result of the email is captured by the following code
Sub SendCompletedCallback(ByVal sender As Object, ByVal e As AsyncCompletedEventArgs)
Dim message_id As String = CType(e.UserState, String)
[Code]....
This works fine when the code is run within a form but when i move it into a dll calling it from a console app it neither sends emails nor picks up any errors.
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Oct 22, 2009
Public Class Form1
Public elapsed_time As TimeSpan
Public start_time, stop_time As DateTime
Public txtBreak As String = "180"
[code]....
All the code needs to be controled by seperate timers as the user may need to pause timer3 or timer4 at any one time. The problem I have is that after about 5 minutes the time and elapsed time are about three seconds ahead of the two count down timers.
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Jun 2, 2011
I'm just looking for an answer or idea.I plan to connect vb.net to mysql (which is done) and also the PHP connected to the mysql.But I'm confuse with something.VB.NET is use for offline things (which people will come to store and buy), but PHP is buying / booking online. (You know the airport things right ? customer can directly go to the airport and buy tickets or they can buy tickets from the internet)
For ex :Customer A come to airport and buy a ticket which is only left 1 tickets. Customer B wanted to buy from the internet. Both of them saw there is only left 1 tickets. So, both of them buying. When Customer A buy, the employee click buy at the same time with Customer B.In here, I'm confuse, how to declare which person should get the ticket because they click buy at the same time (server time because PHP and MySQL located to the server and vb.net applciation located to other PC/Machine) ?.
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May 1, 2010
I have two comboboxes on my form and both are bound to the same datatable. The problem is that each time a value is selected from one combobox, the value in the other combobox changes to the value selected in the former. Is there anyway to disable this behaviour?Only performance counts!
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Aug 18, 2010
On my form I have a button that says "Sync To USB" When its clicked this is what I want to happen: The files in ListBox3 will be copied onto a USB Mass Storage Device (if it is inserted) otherwise it will play the sound "USB not inserted.WMV".
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Sep 24, 2010
i just want to ask if how can i sync my files (like dropbox) via web service? is that possible in vb.net?
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Mar 11, 2009
How can I sync 2 binding sources, both binding sources contain the same data(contactsbindingsource)I have 2 forms:1 form is a list of contact information the other is a search form.I have a linq querie in the search form that returns contact names to a datagridview, but I want to be able to double click on selected cell and have the relevant data appear on my first form.Also my first form has FK relationship to another form that contains company information, could this have something to do with it?
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Mar 3, 2009
I am reading a lot in this forum about sync. It must be fantastic. I look a round for any tutorial, but I haven't found one. Let me tell me the story about the new program I want to write.I am working on a campsite in France. When there is a problem like a Mobilehome isn't clean. The person who is working on the reception write a note and the one how is going to fix it will be called. This is not a really good thing.I like to write an program in Visual Basic that allow the person who is working at the reception write the task in an program. This program will use a database to store the task. The person who is working at the campsite will see the task at his mobile phone (Windows mobile 6) He will fix the task and the reception can see in the application that the task is done.So I need a database who is synchronized whit the one in the mobile phone. The mobile phone can work offline and online. By online the database will be synchronized to the one in the reception.
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Jul 18, 2010
I have a new requirement to sync a DVR to an NTP server, but not sure how. I have googled and forum searched, but a lot is VB6 stuff and also for sync'ing a local computer's time. This requirement is for sync'ing time for a Digital Video Recorder on the network.
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Oct 25, 2011
I have been using vb.net for a while. I am trying to figure out if there is a way that i can update file in a given folder to ftp and get any file on server back using vb.net?
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Jan 7, 2012
i'm interested in syncing a remote folder and a local one over FTP but I don't want to use 3rd party components since this is not going to be a public build so I see no reason to invest on something like this now any code snippets or so available? PS. remote folder includes folders also that can change so I want to keep an update of the remote folder on my PC.
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Apr 29, 2009
I have 2 listview with the same number of lines, what I want to do is when a user scroll the fist listview I want to second one to scroll too.
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Sep 16, 2009
I have an application that has several stopwatches. I would like to be able to 'sync' a stopwatch with another at any given time. I tried setting the Elapsed time of one stopwatch to that of another stopwatch but I get that that property is 'read only'.
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Feb 29, 2012
How do you guys take control of a listbox in a form from another form? I could have sworn I've done this before but can't remember how or find any of my programs that did this. In form load i populate a listbox with a routine. I wish to call that routine again to refresh it from another form.
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May 22, 2009
I'm writing a logging program that should log some values each 10 seconds, but I want these 10 seconds to be in sync with system clock e.g 8:32:00, 8:32:10, 8:32:20 e.t.c. One way to achieve this would be to use a timer with quite small interval like 0.2 seconds and do logging if the right time has come, but maybe there is a better way?
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Oct 8, 2010
First: I have a numericUpDown and a class that are bound.
Me.percent.DataBindings.Clear()Me.percent.DataBindings.Add("Value", options, "percent")When I change the numericUpDown the underlying class seems not to update. I have to click outside the numericUpDown to force validation and force syncing. This is very counterintuitive and will cause problems. How can I make sure the underlying data object gets the new value on valuechange rather than validate?
Second: After I change the numericUpDown I have an option that serializes the underlying data in an xml file. The underlying XML file does not always get the right data. To figure out what is happening I added a button that outputs the values of the underlying data object and it is always getting updated. In other words...the control and the object values always agree. The serialize
[Code]...
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Nov 5, 2010
I need to sync the data of a ms-sql 2005 & 2008 server to my development server (mssql 2005 & 2008). The problem is I can't create .bak files, no permissions (to access the network share where the backup is saved). The problem is not that I may not view the data (I have complete read access to the production server). I can also backup data to csv files and read them in on my system, but that's rather painful (encoding, foreign key reference constraints, having to do it for every table, etc...). The problem is that the admin has no time to set me the necessary permissions (he has larger problems...).
How can I still sync the data to my development server ? I need some kind of syncing to a file, then transport anyhow (manual by FTP if necessary), and then update my development database. I've already tried backing up to a back file on a network share, but that doesn't work either. I don't mind if I have to code a bit in my free time, but I really don't want to do all the low level stuff myself, like resolving constraint dependencies.
[Code]...
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Dec 5, 2009
I'm posting this in the vb.net as I will be using visual studio to perform the task. So here is what I am trying to achieve or at least achieve it more efficiently than what I am doing now.
So I have two identical database setups, both with a table , let call it table tblUsers. The local database is edited through vb.net and is a Access database. The second database is hosted on a remote server and is a MySQL databse.
Currently I have no problem connecting and editing either database through vb.net. I'm using OLE DB to connect and handle the Access database and ODBC 5.1 to connect and handle the MySQL database.
Here is what I would like to do:
User opens the program Presses the "update local" button
The program updates the local database to whatever the remote database is The user uses the program to edit fields in the local database
When done, the user presses the "Update remote" button and the remote database fields that have been edited with the program in the local database will be updated to the remote database.
Currently, the only way for me to do this is to go line by line in a for next and use a command builder to compare each field and update that way.
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Jul 26, 2008
Its a Program i created to Sync PSP with my PC (like psp manager)you browse through titles (images) add/remove/sync options plus aconnectivity test but when i start the "Sync.exe" VB Studio 2008 saysthat theres a problem with this code:
Dim Bypass
Dim Value As Short
Bypass = FreeFile()
[code].....
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Jan 10, 2010
I have some richtextboxes which display contents of a jagged array. When the RTB loses focus, contents of the RTB are placed in the array (so new entries in rtb are updated in the array). This works OK with moderate numbers (for example jagged array of type (200)(){}) but in a situation where the array is (1500)(){} the rtb takes approx 3-4 seconds to reload when it loses focus. I was thinking of eliminating some lostfocus of triggering with this logic
On RTB LostFocus
If 'nothing was changed in the RTB' Then
Return
[code]....
Nothing was changed in the RTB means that the user Focused in the RTB, scrolled around, but did not change the content in any way. How would I achieve that codewise? In addition, is there a better way to keep the RTB updated with it's corresponding jagged array from LostFocus?
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Dec 3, 2010
Is that possible? Syncing all my gmail contacts to outlook with a visual basic software?
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Feb 27, 2012
I'm just wondering how to sync multiple WebRequests in function? I'm using this now, but sometimes the requests dont go through...
For i = 1 to 10
Dim request As Net.HttpWebRequest = Net.WebRequest.Create("http://www.site.com/test.php?w=" & "TEST")
request.Method = "POST"
[code]....
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Dec 19, 2011
I am developing an desktop application using vb.net. I have an doubt, can update or sync database which are at different place. Means changes done at one place should get updated in other.
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May 6, 2010
[code] I want that service synchronizes time with server at specific time of day but i can not get this work.
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Feb 12, 2012
attaching the source of the service which is bothering me.This is the part of the code which is the pain in the ass:
Public Class NucDTSync
Protected Overrides Sub OnStart(ByVal args() As String)
Timer1.Interval = 60000
[code].....
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Feb 20, 2012
Alright well i am creating a basic program, it has a login system. When the user clicks login i have timer1.start and then i have a progress bar start to fill, i want to know how to take a label, place it under the progress bar and have it display different text, as in
First message: Validating Login Credentials... (moving ... if possible)
Second message: Verifying System integrity... (moving ... if possible)
Third Message: Connecting to Servers... (moving ... if possible)
Fourth Message: Grabbing user Database... (moving ... if possible)
Fifth message: Login successful!
I want the messages to be in sync with the loading bar, but i also want to try to make my loading bar move slower and when the progress bar is finished and the messages underneath it are aswell i want it to show a new form.
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