I am working with a SQL compact database and I am able to test the connection when I import it and copy the exact file path to my code, but it still says that it hasn't been opened. What am I doing wrong? Are there any shortcuts available if I have already added the database to my project? [code]...
View 2 RepliesWhat would be an cleaner alternative for a code like this.
Dim dAdapter As New SqlCeDataAdapter dAdapter = New SqlCeDataAdapter("SELECT name FROM Users WHERE username='" & GlobalVars.user & "' AND category = '1'", ConnectionString)
[Code]...
I have searched a lot regarding my problem but no solution so i am posting here to get advise from the experts.I am making a windows form application , and using Sql compact database.My Problem :When i am inserting records in the database using code (run time) they are inserted deleted , update and i can see them updated,inserted,deleted in my application , but when i close the application and start again only a few times they are changed, once a million :). Else i again see blank database ,or if i directly put values in the database from the solution explorer Visual studio 2010 , they stay there forever. I am using simple update,insert ,delete statement but not sure why the changes made to database disappear when i close the application.
First this For all :
Dim con As New SqlCeConnection
Dim command As New SqlCeCommand
[code].....
O/S WIndows 7
SQL Server : SQL Express 2008 R2
VB 2010 Express
SQL Server is located on the workstation so the code and the DB are on the same PC
Created a DB connection using the wizard. Tried this with Windows authentication and SQL authentication using sa
Created a Dataset and dragged the grid onto the form1.vb.
In SQL Sertver Management Studio I can update update tables using the same credentials as in the VB connection string
WHen I try to update a record in the VB Dataset it returns the error cannot update database because it is read-only
I have checked the files and folder attributes in SQL Data folder. Nothing is set to read only
I have checked SQL Server Database > Properties > Option > State > Databse Read only = false
I don't what I'm doing wrong here but I cannot get VB to update data via the dataset.
Inotice in SQL Server that the DBname now includes the full path "C:PROGRAM FILESMICROSOFT SQL SERVERMSSQL10_50.SQLEXPRESSMSSQLDATAPAYABLES.MDF" and not just the DB name. Is this becuase VB Express requires you to point to the physical DB file?
Getting this error message and can't seem to figure it out.I have checked and the database iS CLOSED from all possible angles.
rivate Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ref()
[code]....
I have a .mdf file that I open through an Open Dialog Box and use in a ConnectionStringBuilder (where I have the user instance set to True). Later, in one of my button clicks, I try to open the connection (connection.Open()). It then gives me an error as follows: "Generating user instances in SQL Server is disabled. Use sp_configure 'user instances enabled' to generate user instances."
Here is my code:
Option Strict On
Imports System.Data.SqlClient
Public Class frmMain
[code]....
I am currently working on a login page using vb.net. I would like to know how to make connection to an access database and verify that the user logged in is a valid user
View 6 Repliesand i have another problemwhen i try to debug a vb.net project a message appears to me saying"error while trying to run project unable to start debugging on a web server . ebugging faild because integrated windows authentication is not enabled"
View 1 Replieshow do i open any access database in visual basic? the code will be general as i will not know the actual filepath of the database itself
View 3 Repliesi want to know how to open a connection to database from vb.net
View 3 RepliesI'm developing one application that consists in input data (byte mode) into database and then retrieve it. Okay, I've already done that. However, how d'hell now I execute the files that I retrieved?[code]...
View 1 RepliesI am trying to query a MSI to get the ProductCode from the MSI so I can later populate a script with the proper ProductCode.During debugging it "looks" like the database is open for read, however if I look at the oDB object I see this "Error = No further information on this object could be discovered" When it tries to do the OpenView on the SQL statement it throws an exception "OpenView, Sql" I believe that is because the MSI really isn't open for read?I have added the reference to the Microsoft Windows Installer Object Library version 1.0.0.0
Here is the code: (I pass the fully qualified path + filename of the msi)
Private Sub GetMsiProperty(ByVal sMSIFilePath As String)
Const sReadMSIDataBaseErrorStr As String = "ERROR: Could not read MSI database!"
Const msiOpenDatabaseModeReadOnly = 0
[code]....
i am doin project using vb.net 2005 and using this sql query for connection
sql = "select username from login order by username"
con.ConnectionString = "Data Source=" & hostname & "; Initial Catalog=college;integrated security=sspi"
but m getting the following error:
Cannot open database "college" requested by the login. The login failed.Login failed for user 'CI4Admin'.
Error when debugging with open database
View 6 RepliesI am developing an application that is using a Jet database (Access 2007). The database is local to the project (e.g., on the same drive and in the project directory). Any time I attempt to access the database (to create another DataSet, etc., via designer, etc.), I get the ubiquitous "Failed to open a connection to the database" with:
No error message available, result code: E_UNEXPECTED(0x8000FFFF).
Opening the Database Explorer and attempting to attach to the database results in the above as well. There are no apparent locks on the file, etc., and I'm the sole developer for this.
I have 2 tables , the first contains the names and the second contains the URLs
I need to load URL stored in sql server database into webbrowser , the url should be loaded when pressing on the node in the treeview , so far , I created the treeview , and im populating the data from the database into it , I simply need to make the browser load the specific URL when the node is clicked , below is the code
ublic Class Form1
Private Sub EmployeesBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.Validate()
[Code]....
with two fields each and write the results to a third Access database as part of a data mining program with finance applications.Here is the code in question:
Imports System.Data.OleDb
Partial Class Form1
Dim DMDatabase01 As OleDbConnection = New
[code].....
I'm trying to a open a connection to a local database and no matter what I try it just won't work (I'm pretty new to SQL Server and VB for that matter) I tried using 'sqlconnection' with different connection strings but none of them worked or gave me any useful error messages so I tried using 'OleDBConnection' instead, this hasn't worked either and it gives me this error instead:"A first chance exception of type 'System.NullReferenceException' occurred in MyProgram.exe"
Here is the code I am currently trying:
Private Sub MemDetailsSearch_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ConnectionString = ("Provider = Microsoft.Jet.OLEDB.4.0;" & "Data Source = Database.sdf")
DataConnect = New OleDbConnection(ConnectionString)
[code]....
I have a problem on my project homework to make data CRUD files from drive which files upload using openfiledialog.my problem is I don't know source code how to open file from table, if I click path then open file (likes links url. I try to search but until now I can't found it.
View 3 RepliesI am using this code to open an access database but it is password protected where to add the password?[code]...
View 2 RepliesI installed SQLExpress 2008 on my computer this afternoon and have been trying to create a new database and open a connection to it. I found this code online and tried it:
Dim
conStr As
String =
"Server=MSSMLBIZ;Database=;Trusted_Connection = yes"
[code]....
I created a SQL DB named MainDB.mdf and a small VB 2010 application with some forms and datasets. Everything was working OK until i got a new computer and re-installed Visual Studio 2010 and SQL server 2010 on it. I copied my DB from the old to the new computer and also copied by VB 2010 project to it. I used Windows Authentication to connect to the DB in the old computer and also in the new one, i am using different Windows user account names though.
I was able to connect to the DB in the new computer in the Server Explorer section, i created a new connection string to the DB and i can seed there is data in the tables. When i run my VB 2010 application created in the old computer get error:
"Cannot open database "MainDB" requested by the login. The login failed. Login failed for user 'D630Admin'."
I need to get rid of that error and be able to add/mod/del data from my DB using my VB application as i used to.
I want to know what is the right way to close my Database connection while its open.
This is how i open my connection.[code..]
[code].....
View 1 RepliesI am trying to seek a specific record from a database.mdf created in visual basic 10 express. But I am getting OpenDatabase and OpenTable not declared. How can I open and access records? [code]
View 2 RepliesIm doin project in vb.net as front - end and sqlserver 2005 as back-end
View 8 Repliesi use this command to open my ms access database file, but it is not working, what is the problem.... i learn this command from internet tutorials. [code]
View 3 RepliesI have a connection string in my app.config:
Code:
connectionString="data source=.sql2008 ;Database=Database1; Integrated Security=FALSE; Persist Security Info=True;" />
How do I change to another database (one of many) without using multiple strings? Can I change while the connection is open?
Code:
Dim myConn As New SqlConnection(System.Configuration.ConfigurationManager.AppSettings("ConnectionString"))
i know oledb is not supported in 64b. I have read the application must to be compiled in x86. But it doesnt work.
As i said:
-windows 7 64b
-vb.net in visual studio 2008
-office 2003
I'm using old DAO 3.6 to connect Access database (with mde extension). App works fine on XP and on Win7/Vista when UAC is low/disabled. But when UAC is on I get following error: The Microsoft Jet database engine cannot open the file 'C:ProgramDatacompanydb.mde'. It is already opened exclusively by another user, or you need permission to view its data. [code]
View 1 Replies