I want to carry out bidirectional synchronization.I have implemented the code and procedures in the walkthrough however i have nearly a hundred forms and more than 50 tables how do i go about that
View 1 Replies
i have datatable and 2 textbox control on my formI bind text property to coloumns datatabletextbox1.databindings.add("Text", dt, "FieldA")textbox2.databindings.add("Text", dt, "FieldB")bmp = Me.BindingContext(dt)bmp.Position = 0i change valuetextbox1, then i see Rowstate of dt.rows(i) , but i don't see change, i see Unchanged, why ?
View 3 RepliesI have a question regarding the synchronization in multi threading.
I have a function called send which i am calling in a for loop for every data row.
This function creates threads to send emails to different people.
Public Sub send(ByVal Conn As Data.DataRow, ByVal job As Data.DataRow)
MyThread = New Thread(AddressOf Me.start)
MyThread.Start()
End Sub
But every thread created is writing to a log file at different points of time. So, there are very high chances that 2 threads write to the same file at the same time. So, do i need to use any kind of synchronization mechanisms here ? or is it fine without them ?
Stuck on resolving host IPs within a listbox. I want it to carry over the resolved IP's to listbox2. But also have an 2 radio options either to resolve IP to Hostname or resolve Hostname to IP. Thus when I hit the start button, it checks to see which one is selected and starts the process. Here is what I have found, but can there be a simplified version to this but for lists? [URL]..
View 1 RepliesI want to know how dropBox is able to synchronize the large data files without replacing or re-uploading the files again to the dropbox server
Example: an encrypted zip archive
Suppose I've a 1GB encrypted zip archive file Fully synchronized on my computer and on the dropbox servers. On my computer I added to that zip archive file a file of size about 5MB then saved the file on my computer. Dropbox is able to synchronize zip archive file without re-uploading the whole file again instead it just update it with the small change I've done. Also TrueCrypt containers works in that manner.
MainForm having a few buttons, VolForm is inheriting MainForm. I can see this perfectly in the designer.VolForm itself contains a trackbar. Now have 2 forms. Form1 and Form2 both inherit VolForm. If I change the trackbar from Form1, and then show Form2, the trackbar is not having the same value. Is there any way to keep this trackbar the same in every form that inherits VolForm?
View 2 RepliesBeginning development with SQL Server 2008, VB - Visual Studio 2008 on an application that will deploy laptops remotely for 6 months or more. The laptops will have no network or internet connection. There is a requirement to sync DB changes via shipment of USB flash drives.
The remote app will have a subset of the home database data. Some tables need to be synced bi-directionally, some uni-directionally. When the laptop comes home, it will do one last sync, the local DB will be wiped, and it will connect to the home DB.
Being that there are some identity key columns and the remote is only a subset of the the home, I am not sure that SQL Server replication or synchronization functions can be utilized.
Should I Create SQL Server Compact DB's on the remote system when it is deployed and do a table by table compare (in code) to another compact DB created on the flash drive when a sync is needed?
I was trying to work out the best method of synchronising an update of files via vb.net. I want to automatically update some files in a few folders from an FTP site to a local drive. This would ideally be the same folder structure, but on a specified local folder. I have looked at the FTP methods in .net and am able to transfer individual files successfully, but wondered if there was an elegant method to collecting the entire folder from the FTP and it's contents to be re-created locally. I have established the reading of an XML via linq from the ftp to establish an update single and decide whether the local machine is up-to-date or not, it's just the transfer of the folders that I'm stuck on as it's different to using a IO method.
View 1 RepliesI need to develop a synchronization mechanism for 2 or more containers tha contains objects (generic classes) In each container the origin of the object can be:
1) Created New
2) Imported
3) Recovered from the bin (they have been previously deleted)
The main problem that I am facing is this one If One object has been deleted in Container A it should be Deleted in Container B as well during synchronization If one object has been DELETED in Container A (1 hour ago ) and teh same object has been DELETED and RECOVERED in Container B ( 1 hour and 1 second ago) what should i do? keeping in consideration that between the 2 computer the time is surely not identical?
I am trying to test if my synchronization mechanism is set well and so for debug purposes, inserting a deliberate deadlock as under
mtx.waitone(-1)
mtx.waitone(-1)
but when i step through the code in the debugger, it runs fine without getting stuck here. I am sure there is no other thread doing a release on the mutex mtx
I want to create a form that a user will enter information into. Once the user hits "Submit", the program will search through my db. I want the result to populate into a completely new form. I only need the info from one column in order to generate the entire record, but how do I carry the info retrieved from the search what the user selects into the new form in order to populate the new form.
View 4 RepliesI am trying to rotate a select number of bits to right with click of a button. ( bit 7 to bit 0 and rotate.) The patterns should not matter. It could be any combination of set or reset bits. The bit patterns are selected by checkbox0 to checkbox7. I like to rotate without a carry bit. Is there any way(s) to do this?
View 6 RepliesI'm trying to add the original pictures to my vb.net program.When the client computers install the program there should have the original pictures in their computers.And other programs, not this vb.net program, can deal with the picture. Better to get the picture fullpath ,something like D:program filesabcody.jpg.
View 8 RepliesI am facing a problem in my code. I am working on an application in vb.net, its a windows based application. On one of my form I need to perform so many data driven operations.
if I press tab on one of the text box, I need to set a computed value in other text box and need to set the focus to that text box.
I write a code that is a like to this.
Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp
Select Case e.KeyCode
[Code]....
I don't know if my question is sql server related or vb.net or both. so I will ask it here. Let say I have 3 sql servers with replication among them connected together by vpn. let say i have a customer C1 exist on first server S1 and his account is 1000$ which is the same on second server S2 on S1 they enter a new receipt, so the customer C1 on S1 balance became 1100$ while it still 1000$ on S2, and it need 1-2 min for the replication to finished if during this 1-2 min, S2 is entering invoice, C1 balance will show 1000$ while it is actually 1100$ (because the replication did not finished yet) My first idea is to make sql query getting the customer balance from 3 servers and compare them. How I can tell that the customer account are not the same on both servers or check if the replication is finished for that table holding the customer balance?
View 2 Repliescodes to implement buttons to do the following
1. Pause a process/ action event.
2. Resume the process/ action event.
3. Stop the process/ action event.
4. Speak the time based on the clock.
I'm using Visual Studio 2008 on an XP machine and am trying to develop a web app that can interact with websites and carry out automatic tasks.One problem I have is trying to recreate the web requests for automatic interaction.
For example:I use a webBrowser control to allow me to surf a page manually. Then, once I am at a specific location, I'd like the automatic interaction to take over.Part of the website requires a log-in and exchanges cookie data.When I try to read the cookie info from the webbrowser control to build the subsequent automatic requests, the cookie content is incomplete.Upon further investigation, it appears that the site sets one of the cookies to "http only". This stops the value being visible to the webbrowser control.Is there another control or method I could use to retrieve this info?
Which is the most efficient and speedy data structure in order to carry out calculations on it?. I have seen, collections, arrays, list arrays, databases and more. I would prefer to write just straight forward code that will be effective and which I can still understand. What I would like to do initially is have the ability to add new draws to the end of the file, edit the individual files and delete lines if required.
File would then be reformatted to show the corrections made. Some kind of data entry window is envisioned. As far as number crunching goes, I would like to make counts of each number in each of the columns , calculating averages, times since last drawn and so on.
Without being too long winded, I would eventually like to find triple combinations and maybe use them as predictions. So there you have it. This way I won�t have to go off on the wrong path, on a data structure that may not be able, or be too slow for the tasks at hand.
I have an asp:table which I want to exported to excel. One of my fields are alpha numeric and when exported to excel the leading 0s are stripped off. After going through this thread: Validation (CSS 2.0): 'mso-number-format' is not a known CSS property name I would like to use the css method "mso-number-format:@;.But the css is not exported to excel. I just tried to test it with simpler css things like bold font etc but its not getting carried over. I can see that if I surround my asp:Label with tags this change gets carried over to the excel but not the css bold . Other solutions in other thread does not work for me as ="00111" shows up as desired in excel but in the web form it shows up as ="00111" which is not what i want.
View 2 RepliesLet's say you have a user class. When the user is logged in there are properties representing basic user info, an associated address and, say, 5 profile pictures, the last a generic lsit like this: Private _photos As List(Of Photo). However, instead of carrying the weight of the profile pictures in a session vairable, to reduce resource usage, I only want to populate them if the user needs to acces them. So, for the most part, the generic list of photo's is empty. Will it carry weight anyway? I'm trying to decide if I should just not populate ituntil needed, or if I should create an alternative "light" user class which doesn't have this property.
View 2 RepliesWhat is ado.net synchronization services and how to use these services
View 1 RepliesHow Do you Carry A Value From One Form To A Different Form?Using Visual basic 2005(Must use the same integer, you may not just transfer the number (As In just typing it in) on a different form. The integer itself must be carried over.
View 3 Replies
