what is the diffrence between single call and single ton 2)is it possible to maintain state for every user whose requests not overwrite with another user..i mean i created one remoting application and client.i have one class created in remoting application and i am calling functions created in this call from client application.
View 3 RepliesI have a couple of files which I have to update periodically through a process written in VB.net . These files are on a server and part of a domain that many users can access. These files should never be written to as they are for reference only. I need to be able to overwrite some of them even if a user has them opened. Is it possible to do this? Presently the files permissions are not set as read-only but I can do this as long as the user under which the process runs will still have permission to overwrite them.
UPDATE: thx for your responses. The files are pdf and are opened by clicking on them from windows file explorer. This also happens when a user simply has the file selected in windows explorer.
Write a program that requests a name fomr the user and insert the name into the list in its proper location, if the name is already in the list, the name should not be inserted. --do not use any arrays or LINQ use only streamreader/streamwriter.What i've got is this...it will add the name but not in the "proper location". if i could use an array i'd just reorder the array and then write to file, but...
Imports System.IO
Public Class Project_3a_p398
'Purpose: A program that requests a name from the user
[code].....
I'm trying to save an excel file:
vb.net
xlWBook.SaveAs("J:DOWNLOADS.xls")
xlWBook.Close()
xlApp.Quit()
If the file already exists excel will open an message box and ask if you want to overwrite. If I click yes, it works. If I click no or cancel, I get an error:
Exception from HRESULT: 0x800A03EC
How can I tell what button the user clicked?
how to maintain state of textbox while postback
View 2 RepliesI'm pretty new to WinForm Development (Normally just do Web Dev)... Anyhow, what i'm trying to do is store information about the logged in user so it can be used throughout the App...Normally in WebDev you could use Session, Cookie Etc..
View 4 RepliesIf I have an event that starts a timer with an interval of say, 30 minutes, and 15 minutes later, the computer the app is running on sleeps (Suspend to RAM) or Hibernates (Suspend to Disk), and is brought back online after ten minutes, will the timer raise its Tick event in 5 minutes (30 minutes REAL time from the start) or 15 minutes (30 minutes RUNTIME from the start)?
View 1 RepliesI need help making this code work better. Currently, what happens is when it reloads, I loose the third value which is a calculated value . I would like for my page to reload without loosing the values for each property and each instance of the user control on the page.
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I need to write a program that requests a high number and a low number from the user, then the program searches the array and finds all elements within the two numbers. The program is used to search for past presidents, so if I type 43 for low number and 44 for high number, the program will display:
George Walker Bush
Barack Hussein Obama
I think I have an idea of how to search up to a certain point, but not to stop at a certain point....Here is the code that I have for that particular sub procedure:
Quote:
Private Sub btnDisplayRqst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplayRqst.Click
Dim sr As IO.StreamReader = IO.File.OpenText("PRESIDENTS.TXT")
[CODE]...
I'm setting up a program where I would like the user to be able to select a state from a combo box. I can not figure out how to allow to select the abbreviation from the drop down list and also allow them to type a letter and it will select the state from the state or just allow them to type the full abbreviation that would match what is already in the list. It is supposed to be in the drop down list style. I would also like to confirm that the user has chosen a state before allowing them to click a submit button but I'm not sure how to go about confirming it.
Private Sub FrmMain_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
' Inserts state abbreviations in combo box
cboState.SelectedItem = " "
cboState.Items.Add(" ")
[code].....
Error: The database has been placed in a state by user 'UserName' on machine 'ComputerName' that prevents it from being opened or locked.
View 5 RepliesI have a VB2005 winforms application that will loads city data from my database table. This is to ensure that the user enters the correct city spelling, in order to receive an accurate quote. Currently, there are about 150K cities that are being loaded to the dropdown listbox on page load. It takes about 30-40 seconds for that page to load. My initial thought was to allow the user to select the state first. Then load the city values. But the user has the option of going back and requesting a quote for a different city / state.
View 2 RepliesI have a oracle database. I use the OracleDataAdapter(Oracle.DataAccess.dll) for select, update, insert, delete operations. I don't set any (table) locks on my own(I only start a transaction). I have a oracle table named "test" with the entry "test1".
Now my question: Can Person A read the entry "test1" while Person B is updating/deleting the entry at the exact same time? What happens in the worst case? An old match/empty match or can it cause any kind of exception/error(e.g. "TableLocked-Exception")?
writing user info such as user, computer name, date, and time to an acces database using a button click event. Then use a query to check if the user has accepted the aggreement. If the user has accepted the aggreement then call a vb.exe that display the aggrement. I have a login script that runs the vb.exe and uses a button click that records the user info to a csv file, but if the user has already agreed to the policies I do not want it run again.
View 4 RepliesDim sqlConn As New SqlConnection("Server=.\SQLEXPRESS;uid=;pwd=;database=ContactManager")
sqlConn.Open()
Above is my connection string, The programs runs up until sqlConn.Open() and then i get the same error, using no UID and Pass, or using a uid and pass.
Login Failed For User ''. The user is not associated with a trusted sql server connection
I have the SQL Servers authentication se to Windows Authentication and SQL Authentication. I'm using Visual Studio 2005 and SQL Server 2005.
I have been trying to solve this for 2 days now, every text book I own and google have been well and truely exhausted and I am still no closer to solving my problems.I have a login facility reading in user info from a main user file. This takes all info into a temp array and then splits usernames into a username file, passwords into a password file and a current score in a score file.
I have the login working fine and everything else in my program works as intended but touching up cosmetic aspects I want to add a Message box after login to say hello and display current score. This works great for the first name in the user file i.e - after login User1 welcome to the game. Your current score is 45 As intended.But the problem arises with any other users, my message comes out as
User2 welcome to the game. Your current score is 55 I do not understand where the random new lines are coming from. I have tried assigning the message as a variable and removing new line using
[Code]...
in vb.net i am trying to save application settings but for USER but i cannot find the user.config file
when does this file get created?
i searched my entire hardrive. i also searched the entire project.
I'm trying to save what the user types in the vb code Dim user as Inputbox("") for example in a .txt file i can save the textbox and listbox but i cnt figure out how to save the inputbox i really need this to be saved the most.
View 7 RepliesHow can i close my vb.net application when user shutsdown, restarts, log off or switches user?
View 6 RepliesCan i use the timer when the user tries to log-in and the user entered a wrong password 3 times.i will give the user 5 mins to log-in again with the correct password and if the user enters the wrong pass. 3 times again i will give another 10mins also this is what i want when the user close the program the timer is also their and running that it will give the user the remaining tym on how much tym left 4 him to log-in again.Can i do this in vb.net??i dont know how 2 do this i dont have a clue if it is possible can someone give me a code??
View 9 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 can I do it so every time the user loads my application it will automatically (without prompt, or user selecting) upload all the files in a folder i select beforehand and add them into ListBox1
View 16 RepliesI was developing my own project in the university so what i am stack is to have save button which firstly validates what the user enters the form. for instance if the user skips the text fields, i wanted to restrict the user to fill all the form and when he completes, the save must be accomplished.
Here's the code i was trying to put but i was having problem saying the windows.forms.etc is unable to convert the save as Boolean and something like that.
Dim success As Boolean
Private Sub Save_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Save.Click
[CODE]...
I am creating a form for work where managers can report when they find a customer's personal information laying around on a desk (we work at a call center where agents answer calls for a wireless cell phone provider, so we take personal information security very seriously). Anyway, I am wondering if there is a way to have a text box autofill with that manager's windows username (since they will need to be logged into their own profile to use the form).
View 2 RepliesI have some custom user controls in my .net winforms program that do not display correctly when the user has selected larger text size. This setting:
My controls look like this:
Instead of like this:
The bill to area and ship to area are both custom controls. I don't know if this is contributing to the problem but I do have code in each to scale the phone/fax areas to stretch nicely, like this code from the bill to control,
Private Sub panFaxPhone_Resize(sender As Object, e As System.EventArgs) Handles panFaxPhone.Resize
panFax.Width = (panFaxPhone.Width / 2) - 1
panPhone.Width = (panFaxPhone.Width / 2) - 1
panFax.Left = panFaxPhone.Width - panFax.Width
End Sub
How can I get my controls to size correctly while still respecting the users choice for larger text (I don't want to just set the AutoScaleMode to None)? After playing with this for a long time it seems to be a problem with anchors in the child controls. See this below image, the inner black box is the control with its border turned on, the text boxes (like name) are anchored left and right and should stretch to fill the control, but don't.
I'm running an application under an account that is not the account logged-on to the PC.
Within the application I need check if the logged-on user is a member of the Administrators group. Below is the code I'm using. From what I've read, WindowsIdentity.GetCurrent() should return an object associated with the logged-on user. It doesn't, it returns the same information as the call to System.Threading.Thread.CurrentPrincipal. Which is the information associated to the ID running the application, not the logged-on user.
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i am having a console application. I am trying to connect to a sql server.
my connection string: Data Source=<Some server>;Initial Catalog=<some database>;Trusted_Connection=True.
when i am executing on my local machine it runs successfully. But when i am trying to run it on a server it is giving me the following error:
Login failed for user ' '. The user is not associated with a trusted SQL Server connection.
do i have to change my connection string? if so what it should be?
I'm currently writing a program that needs to open a file specified by the user, replace a certain string of text with a different string of text, and save it to the user-specified path. Here's what I have so far:
Private Sub forceButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles forceButton.Click
Dim writer As New IO.StreamWriter(OpenChart1.FileName)
Replace("", "E *", "N 5 0")
End Sub
i have a windows from project and in that project i created a user control lets call itcustombutton1 now i can use that control quite easily either at design time or runtime by creating a new instance of it like
View 1 RepliesI'm designing a PC-based app that has a little local database. I'm using VB.NET with SQL Server Compact Edition. The user will only ever have access to one database file, because it's all about storing a user specific data. However I'm thinking of the situation where there could be multiple users that access the PC, each with their own Windows account. So ideally I'd need separate database files for each User.
I'm not sure how to implement this. I was hoping to deploy the 'empty' database as a ClickOnce deployment, but I can't see how I can have a database per user doing this. Also I'm not sure where to store the database files anyway. perhaps in MyDocuments for each user? Or perhaps I need to stick to just one database, but add a 'User' column into every table, so it can hold data for every user. I didn't want to do this though - because I wanted to keep the nice separation between the data offered by physically separate files.