Failed To Open Database Because Database Is Read-only?
Jun 18, 2011
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?
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Jan 13, 2011
I figure why this happens, and is because of Windows 7 and its permissions. Now I'm trying to fix this. but the code for this is a bit complicated for me. I found on this website an example on how to set the permissions on files. ([URL])
[Code]...
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Apr 17, 2009
I 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.
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May 8, 2012
I'm using Visual Basic Express 2010 and SQL Express 2008 in Windows XP. At first I couldn't add a datasource (the .mdf file for the database) because of a "Operating system error 32" which I seemed to have resolved by giving myself full permissions for .mdf file (by right clicking on the file and going into properties and then Security) and restarting the SQL SERVER (SQLEXPRESS) service. The dataset for the database is in my solution explorer but when I right click on a table adapter to add a query and attempt to open up the query builder, I get the error in the title above.
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May 8, 2012
I'm using Visual Basic Express 2010 and SQL Express 2008 in Windows XP.I created a database on my local PC HDD. At first I couldn't add a datasource (the .mdf file for the database) because of a "Operating system error 32" which I seemed to have resolved by giving myself full permissions for .mdf file (by right clicking on the file and going into properties and then Security) and restarting the SQL SERVER (SQLEXPRESS) service.The dataset for the database is in my solution explorer but when I right click on a table adapter to add a query and attempt to open up the query builder, I get the error in the title above.
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Mar 15, 2012
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.
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Jan 17, 2011
I have a report made in Crystal Reports XI. The report is generated and exported to PDF in visual basic script using COM interface. Generally everything is running smoothly, but in one case generation breaks with error: Failed to retrieve data from the database. Details: [Database Vendor Code 9421]
Database used is MSSQL 2005 connected over ODBC to CR XI. When I am opening report with exactly the same parameters in Designer, everything works fine.It looks like it is data related, but it is hard to trace since the whole report is pretty sophisticated. Anyway I spent half a day on crawling over Dr. Google and it seems that he has no clue what might be an issue.
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Oct 1, 2011
My first time trying to log in to my local sqlserver with VS2010 was greeted by this vague, unhelpful error:
"Cannot open database "Database1.sdf" requested by the login. The login failed.[code]...
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Mar 1, 2011
I got the above error when i deploy my web application into windows server 2003. How do i resolve it? [code]
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Feb 21, 2010
I followed below attached tutorial but I got this error: Cannot open database "mydb" requested by the login. The login failed. Login failed for user 'NAME OF COMPUTER FOR THE NETWORKUsername'. Second question: When I deploy my application which communicates with SQL server, should I put in the installation file SQL server? If I need to deploy and SQL server, I have to configure server, right? P.S.I use SQL 2005. I changed Authentication Mode of the SQL server to: SQL Server and Windows Authentication mode.
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Jul 20, 2011
When I install my application, some forms are unable to connect to the database.
I say some because, when my login form works totally fine. Authentication happens.
But once I go into the main application, and open other windows, I start to get these error mesages:
[URL]
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Mar 9, 2009
im creating a windows form where it will read data in a file n extract the data into the database.. the data in the files are in this format :
20090301,C4933,ASB02
20090301,C4933,BL689
20090301,C4933,BL707
[code].....
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Sep 10, 2010
ode if I/m wrong i cannot save my file im using sql server 2005
Imports System.Data.SqlClient
Public Class Form1
Private cs As New SqlConnection("Data Source=GSM-DB6CB13C69E;Initial
[code].....
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Jan 15, 2012
Error : "Detach database failed for Server 'MONO-PCSQLEXPRESS'."
Public Sub bk()
Try
[code].....
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Apr 25, 2012
I have 1 exe and 1 dll. The dll (ClassLibrary1) file is located in the root of a website. In the dll I have a UserControl that populates with data its controls, from a database that is on a website too. The end user gets the exe file. This exe loads the dll and displays the UserControl1 on the form. This is how i load the control from inside the dll (located on the web site), on my form (exe file).
Private _dll As String = "http://www.site.com/ClassLibrary1.dll"
Private _class As String = "ClassLibrary1.UserControl1"
Private WithEvents cont As UserControl
[code]....
The error is "Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed."Note that if i dont load the usercontrol from the web and instead have it locally, there is no problem. The data are fetched from the database (db is on the web) with no problem.The problem seems to be that the loaded assembly from the web (the usercontrol1 inside the dll) has no permission to access anything. I am not trying to access stuff from the user's pc (like file IO), but access a database located on a web server.
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Jun 23, 2009
Dim mysqlconn As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=.ccsinventory.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True")
Dim myinvdataadapt As New SqlDataAdapter("SELECT * FROM inventory", mysqlconn)
Dim myinvcmdbld As New SqlCommandBuilder(myinvdataadapt)
[code]....
Why does this not work and why am I getting this error?I am under a deadline of less than 20 hours to get it working.
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Oct 31, 2009
I want to read XP sam database using VB.NET.. How can i achieve this
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May 2, 2011
What is the best way to read XML that is stored in a database as a varchar or other data type? I need to be able to work with the XML as XML and save it as a xml file outside of the database.
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Jan 7, 2012
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]....
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Dec 31, 2011
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]...
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Nov 23, 2011
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]....
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May 12, 2005
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
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Jan 17, 2009
and 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"
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Aug 17, 2009
how 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
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Jan 17, 2009
i want to know how to open a connection to database from vb.net
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Jul 27, 2011
I'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]...
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Jun 21, 2010
I have an old VB.NET project that can read my database files perfectly.I have a second project (which is the exact same code as the first, just an updated GUI) that cannot read ANY access database files. Even if I create a new one from scratch. How can one project open database files without error, but the new one I made can't?This is the code I have for both of them.
Imports System.IO
Imports System.Data.OleDb
Private con As OleDbConnection
Private cmd As OleDbCommand
[code]....
I get the following error:Yes, I blurred out my file paths because you don't need to see the names of my folders due to privacy concerns.
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May 14, 2012
I have simple application with MS SQL (.mdf) database. It's all works fine on my computer, but when I run app on another computer, and when I try to add new data I get error: "Failed to update c:\program files\..database.mdf because the database is read only".
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Jun 22, 2010
I have memebrship system with mysql database.In the table I have comumns named Username, password, information...I have to found the row with the username who have logged in and put the text from information column in textbox...
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Mar 31, 2009
i need to read and write to a database (access 07) using visual studio coding in vb.
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