I need to be able to terminate/locked the account in vb.net if the user input wrong username/password in my Log In form like 3 attempts is good. and be able to enabled the account also as an Admin.
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I have made a login form but I have some problems:first, how do I make to make my login only three attempts and terminate after three attempts.second, how can I make a moveprevious and movenext records using ado.net coding...I am hoping for the positive response.
View 3 RepliesI am looking into programming an application that detects noise levels. If the level is over a specific threshold it will lock a logged on user account. The idea behind this application is to reduce noise levels in a busy IT suite. My question is has anyone written anything similar and did it prove to be effective and is VB the best programming language for the job?
View 1 RepliesI created a vb application and I'm trying to deploy it. However, it needs to be run as administrator, which is not ideal as several machines I'm deploying it to can't access the administrator account. The odd part is that the development environment isn't on an administrator account. When I double click the compiled executable it runs fine. When I right click and choose Run As Current User the program crashes and gives me the same error I got when trying it on the target machines(without access to the administrator account.)
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I am creating an application in vb.net that accesses a database on a drive that other students do not have access to. The program will not run correctly if it is run under one of these students accounts. How can I make it so the program will access the db under any account?
View 2 RepliesVingCard has software name Vision to create hotel's door access KeyCard an to connect to encoder device.I want to connect and crate access keycard via my application but I don't found SDK how to create access KeyCard using vb.net or have SDK?
View 1 RepliesI have a website [URL]
have a login.aspx form and we can access with user and passs
but i want i can from site2.com.vn call a function with username,pass and use viewstate to access site1.com.vn without press user and pass
I'm trying to use two different methods of connecting to a database to edit data, the declaration below is working:
Dim rsConn As ADODB.Connection
rsConn.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" _
& Application.StartupPath & "VFMS_DB.mdb;" _
& "Jet OLEDB:System Database=Security.mdw", "Ads", "1234")
but now I want to do the same thing with the declaration below but I keep getting the message "Not a valid account name or password.
Dim conn As OleDbConnection
conn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" _
& Application.StartupPath & "VFMS_DB.mdb;" _
& "Jet OLEDB:System Database=Security.mdw;Database Account=Ads;Database Password=1234;")
I pretty sure it's because of this ;Database Account=Ads;Database Password=1234; not being correct. I tried ;User ID=Ads;Database Password=1234; and also to make it look like the first statement but neither worked.
I have difficulty in removing the LDB generated by the "CREATE" method of ADOX in the following code segment.Aims: Create (on the fly) a new access database and then export data (says Arena modules) to that newly created database.
Expected: The newly created access database should be able to be used by some external operations, say Access.exe, after the end of the subroutine and without exiting the current VB program.
1) I tested that the "Arena code" do nothing about the create/release of the ldb file.
2) I tested the "Exclusive Mode" in connection string, but the access file is still locked by the vb program.
3) I tested under both inside the VB environment, and directly invoke the generated from Explorer, and same results.
4) Other database formats is not the options to me. (due to Arena export limit)
5) It is not a web app.
Code:
Sub Method1()
Dim logs As New System.Collections.Generic.List(Of String)
Dim arenaApp As Arena.Application = Nothing
Try
[code]....
Platform:
Windows 7 64bit, Office 2010 (32)
VB 2010 express
Lib: MS ADO Ext. 2.8 for DDL and Security
Does anyone know how to run windows explorer with an admin account while logged in with a non admnistrative account? i want to be able to open up an admin share on a remote host with windows explorer instead of iexplorer. I tried some code I found on the net to impersonate but it didn't work.
View 2 Replies1. I have to create a file. 2. Then I want to write a string into the text file.
I can do part 1 no problem with: File.Create(strFilePath) But when I try part 2 to write to the file it won't allow this as it's still being used:
sw = File.AppendText(strFileName)
sw.WriteLine(strCode)
sw.Flush()
sw.Close()
My code in part 2 works fine on a file that hasn't just been created.
How do I release the file from the File object?
There doesn't seem to be a .close or .flush option.
I have an email account. I need to write some code that looks for any new email message on it and in case there is, it saves the attachment in a particular destination.
View 5 RepliesI am currently working on a stock market monitoring application. how to create a new portfolio(sort of a personal account) for each user that accesses the system such that 2 different users do not have the same portfolio. I am making use of SQL server for my database.
View 3 RepliesI have two combo boxes and one text box that verify subject code, user name and password respectively. I want the user to have only three attempts after which a message is displayed and the form closed.The code below is supposed to allow the user to have only three attempts to log on but it rather gives the user countless number of attempts. What is wrong with it?
Dim frm As New MarksEntryFrm
Dim flag As Boolean
Dim ctr As Integer = 1
[code].....
We needed an inter-process reader/writer lock.We decided to use a file and lock the first byte using LockEx and UnlockEx. The class creates a file in the system temp folder when it is created. The file is created with readwrite access and share read|write|delete.We also specify DeleteOnClose so we don't leave loads of temp files laying around. Obviously AcquireReader and AcquireWriter call LockEx with appropriate flags and ReleaseLock calls UnlockEx.We have tested this class using a small application that you can run several instances of and it works perfectly. The application that uses it has a problem, which we have managed to re-produce in another small test app. In pseudo code it is
Create InterProcessReaderWriter
Dispose InterProcessReaderWriter without acquiring any locks
Launch a child process which takes a reader lock
The first time this runs, it works fine. If you attempt to run it again, while the child process from the first time is still holding the lock, we get an UnauthorisedAccessException when trying to open the file.This appears to be a permission issue, not a sharing violation but all the processes in this test case are running as the same user.
Private Sub CheckLogin()
If Failed == 3
'show recapacha
If Page.IsValid Then
CheckLogin2()
End If
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What I have is a login form but I do not want to show the recapacha till there are 3 invalid login attempts. I'm not sure as to the best way to do that. Above is some mockup code to get an idea on where I am heading.
I have a small service which right now I just want to test by printing some string that is passed in and stored in a class.
Problem is everything works fine, service even starts fine as long as I don't call PrintDocument's Print function.
The moment I do that, the service never starts and I get Error 1053:Service didn't respond, etc error.
We have a windows service running under a network account that calls and runs an ActiveX exe. The exe is running under the local system account, not the network account of the service.
View 1 RepliesI have an third part dll that have a function that returns a string.When I call the function I got for example "123456" back. At least it seams like that, but when i do mystring.length it does not return any length. If I set the text property of a label it shows "123456".
When I have the string I got from the dll I send it to a webservice function:
rem call dll and get string
dim mystring as string=mydll.getstring()
rem Send it to the webservice
webservice.SaveString(mystring)
The webservice crashes with an webexeption ("protocoll error") when I send in the string I got from the dll. If I instead send it like this:
rem call dll and get string
dim mystring as string=mydll.getstring()
rem Send it to the webservice
dim FixedString as string = mid(mystring,1,6)
webservice.SaveString(mystring)
Then it works and everything is fine. That leads me to think that the string I got from the DLL is in someway not terminated correct.And I dont know how to fix it from vb.net (I cant change the DLL)and I dont know in beforehand how long the string will be.The dll does only work on site when specific hardware is connected so I can't sit at the office trying to fix this in dev-environment. So I would like to have some possibly solutions to this before I go to the customer again.
Edit 1:I tried to just do a loop that looped from 1 to 100 (because I dont know the real length) and tried to copy all characters that <>"" to a new variable but it didnt work. I didnt try other variants because the day was over and I had to leave the customer site.
Edit 2:The DLL Im talking to is made in VB6. That DLL is talking to other DLLs that is made in C++ (I think).
My program < - > vb6-DLL <-> c++-DLL <-> hardware
Is there any way to convert null terminated string to normal string.I mean I can easily make a program to find the location of vbnull but there has to be a built in function for that.
View 15 RepliesI'm reading a binary file. Apparently its older, and some of its values are based not on position, but on null terminated bytes. Position 17 thru 35 represents a value, however, if their is a null byte at 30, then you get garbage if you try to read 17 thru 35 as a value...
I need to read, specifically, from 17 to 29 in this instance because pos 30 is a null byte.
Have to read it byte by byte, no problem. Not sure though the syntax of comparing a null byte specifically.
If you need a sample of the binary file, I can post it.
I thought I postet this yesterday but I can't find my thread so if this is a duplicate please point me at the original one. Background: I need to create a user account and Modify it's registry before the user logs on the first time. Creating the account is done by using the Winnt provider (works great). To create the profile I'm trying to use Process.start to launch a process as the newly created user. With the use of loaduserprofile property the users profile gets created and i can do my regwrites without problem.
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I am getting the below error when I click a row in the grid. But this error is raised only in exe, which is installed in client machine, but when I check the same from source code in my machine, i am not getting this error. I am able to locate the record.
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String or binary data would be truncated. The statement has been terminatedAs I've looked back on my backend or code. It looks like there's a conflict adding a TWO LABEL DATA in one column because I would like to join the (Year)-(StudentNumber)Here's the code of my INSERT INTO Statement
INSERT INTO
[Student_Information] (StudentID, LastName, FirstName, MiddleName, Gender,
ContactNumber, Citizenship, Religion, Birthday, Address)
[code].....
This gets data from Excel and puts it into a table. The first 2 rows of data are placed into the table. All the fields columns are the same type and nothing is larger than it should be name is varchar(30) team is varchar(3) pos is varchar(2) rest are int or double. I place an i in front of integers s in front of string and so on. The 3rd row crashes with the following message at Command.ExecuteNonQuery() String or binary data would be truncated. The statement has been terminated.
Option Strict Off
Imports System.Data.OleDb
Imports System.Data.SqlClient
Public Class Form1
[Code] .....
Protected Sub cmdOK_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdOK.Click
Dim medID, medName, comment As String
[code].....
I am trying to call an external C++ function using VB.NET (answers in C# are fine, I can convert back) which returns a list of device names. This comes in the form of a pointer to a null-terminated array of null-terminated char arrays (correct me if I've misunderstood what I'm dealing with) with a function signature:
long GetNames(char*** names)
Most of the answers to similar questions I've found have involved something more like:
long GetNames(char** names, int length)
It appears from what I've read that I need to give it an IntPtr but I'm uncertain as to how this should be initialized, and in my case I don't know the length of the array. At the moment, in the VB module, I have:
<DllImport("MyExternal.dll", CallingConvention:=CallingConvention.Cdecl)> _
Function GetNames(ByRef names as IntPtr) As UInteger
End Function
I've tried calling the function by passing an IntPtr initialized as IntPtr.Zero or using Marshall.AllocHGlobal, but I always get an AccessViolationException.
Any ideas on how I should be calling this function and how I get the return value into a managed string array would be greatly appreciated.
EDIT: I've found a sample function call in native C as follows:
char **tmplist;
GetNames(&tmplist)
Am using Vb.NET 2008 and SQL 2008. I have a problem, when the execution reaches daAdapter.Update(dtTable) then I receive this error ""String or binary data would be truncated.The statement has been terminated"" Then the record fails to update.Below is the complete code. Thanx in advance.
Dim SQLCon As SqlConnection
Dim SqlQuery, SqlQuery1 As String
Dim daAdapter As SqlDataAdapter
[code]....
iam trying to insert some values to SQLServer 2005 Database.The following error displaying.I changed the corresponding column size,still the error persists.how can i sove this error-:'String or binary data would be truncated.The statement has been terminated'
Me.Personal_detailsdbTableAdapter.Insert(Me.FirstnameTextBox.Text, Me.LastnameTextBox.Text, _
Me.PassportnoTextBox.Text, Me.PlaceofbirthTextBox.Text, _
Me.SexTextBox.Text, Me.DobDateTimePicker.Value.ToString)
This is the SQL Database Table Design
firstnamenvarchar(50)Checked
lastnamevarchar(20)Checked
passportnonvarchar(50)Unchecked(Primary Key)
[code]....
Basically, I wish to fetch a filtered set of objects from the database (Oracle 9.2) based on the id property of the object PsalertsEvent. The code being executed is:
Public Overloads Function GetAll(ByVal laterThan As Long, ByVal filteredPsalertsEvents As IList) As IList Implements IPsalertsEventRepo.GetAll
'Get all psalerts events with an ID greater then the specified laterThan parameter
filteredPsalertsEvents = MyBase.NHibernateSession.CreateQuery("from PsalertsEvent p where p.id > " & laterThan).List
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