Connecting To SQL Express Database In C# Application
Mar 8, 2007
I'm trying to connect to a sql express database on my local machine, using the following connection string:
SqlConnection thisConnection = new SqlConnection(@"Data Source=C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataTest.mdf");
However, I keep getting an error message saying "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections."
Why would my application be trying to connect remotely when the database is on my local machine? And how can I fix this problem?
How do I get rid of this error message when tring to log into my web site user account stored on the default ASP.NET 2.o generated database on my local computer?
Server Error in '/FundACure.org' Application.
Cannot open user default database. Login failed. Login failed for user 'LANBOYASPNET'.
Where "LANBOY" is the name of my computer. I am logged in as myself "LANBOYKEVIN" My web page is trying to log into the server using the name "ASPNET" which I assume is a standard ASPNET user name.
I thought it was failing because I needed to grant access to this user in the server, so I added the account for the server. Same problem.
So I thought I needed to create this user in my Windows XP user list. When I tried it said "this user already exists" even though it isn't displayed in the list. That is when I realized that it is a standard user established by ASP.NET. It is probably supplied in the C# code through a base class.
So, how do I get this DB to connect? Is the user missing, or is it that my connection string is wrong?
I have an ASP application which is currently using a SQL 2000 Database, attaching via SQLOLEDB. I am getting ready to migrate my ASP application to .NET using SQL Server 2005 Express. The only problem, is that I am unable to connect successfully from my ASP applcation to my DB under SQL Express.
I have taken all of the steps that I have read, including the blog by Ming Lu. I still cannot be through.
I have included both the messages that are thrown and comments about the drivers and connection strings.
I have enabled TCP/IP and Named Pipes for SQL 2005 EE. I have also included the executable, port 1433, port 135, etc. in the firewall exceptions.
I have defined the DB in ODBC using both the Native Sql driver and the SQL Driver. Connection authentication is via SQL Server Authentication.
If anyone has any input, I would be grateful.
Error Messages:
Named Pipes Provider: Could not open a connection to SQL Server [53]. - using SQLNCLI - SQL Native Driver
::[DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied. - using SQLOLEDB - SQL Native Driver
::[DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied. - using SQLOLEDB - SQL Server Driver
Named Pipes Provider: Could not open a connection to SQL Server [53]. - using SQLNCLI - SQL Server Driver
connection string for SQLOLEDB: "PROVIDER='SQLOLDEB';DATA SOURCE='.SQLEXPRESS';User ID='Abilities2005';Password='abilities';Initial Catalog='nbdc2005';"
connectdion string for SQLNCLI: "PROVIDER='SQLNCLI';DATA SOURCE='.SQLEXPRESS';User ID='Abilities2005';Password='abilities';Initial Catalog='nbdc2005';
source name varied from .SQLEXPRESS, localhostSQLEXPRESS and machinenameSQLEXPRESS
Hi, I have a problem connecting to database using windows authorization. this is sample codeSqlConnection oSQLConn = new SqlConnection();oSQLConn.ConnectionString="integrated security=SSPI;Server=SHAREPOINT\EPM;Database=STS_sharepoint_1;Trusted_Connection=true;";oSQLConn.Open(); on Windows Aplication it work good but on ASP.NET Web application I got an Server Error - Login failed for user *****************is it problem with IIS configuration???
I know how to create an Application role in SQL server 7. Now how do I connect to the database from VB using that Application Role? I can't find anything about this topic anywhere. Is this the purpose of an Application role or am I way off?
I am thinking of using my web database as the database to use for my program, though not sure how feasible due to connection speeds and having to transfer that info.
what I am using as the connection string is
con.ConnectionString = "Data Source=databse ipadress inserted here; Initial Catalog=databasename here;Integrated Security=True"; with real data obviously inserted into the ip and tables, but when i try and send values there it just hangs and then crashes. I am thinking its not finding the database. Is there something else im to do?
I am using the exact same code as when i use my own machine as the server, and it works great that way, only thing different is the trying to send to the web server.
I have created an application which uses a SQL Express database. The program runs fine on the the computer where I built the app, however when I install the app on another computer I get an error telling me that under default SQL Express does not allow remote connections. The problem is that I dont want a remote connection I want a local connection, the database file is on the commputer. How can do get my application to look for the database on the local machine.
My connection string is:
Data Source=(local)SQLEXPRESS;Initial Catalog="C:DOCUMENTS AND SETTINGSADMINISTRATORPLDAQ.MDF";Integrated Security=True
I have made sure that the file is in the correct directory.
Here is the error message I get:http://img109.imageshack.us/my.php?image=error2ug.jpgI have just installed both packages and havent done much in the way of configuration... What do i need to do? Thanks!
Can VB 2005 express able to connect remote SQL 2005 express database? I played with connection string many time and still could not success! Thanks all.
In the VB 2005 Express, I can get the SqlConnection and ConnectionString of a Database "shcDB" in the Object Explorer of SQL Server Management Studio Express (SSMSE) by the following set of code: ///--CallshcSpAdoNetVB2005.vb--////
Imports System.Data
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Public Class Form1
Public Sub InsertNewFriend()
Dim connectionString As String = "Data Source=.SQLEXPRESS;Initial Catalog=shcDB;Integrated Security=SSPI;"
Dim connection As SqlConnection = New SqlConnection(connectionString)
Try
connection.Open()
Dim command As SqlCommand = New SqlCommand("sp_insertNewRecord", connection)
command.CommandType = CommandType.StoredProcedure ....................................... etc. /////////////////////////////////////////////////////// If the Database "shcDB" and the Stored Procedure "sp_inertNewRecord" are in the Database Explorer of VB 2005 Express, I plan to use "Data Source=local" in the following code statements to get the SqlConnection and ConnectionString: ......................... ........................
Dim connectionString As String = "Data Source=local;Initial Catalog=shcDB;Integrated Security=SSPI;"
Dim connection As SqlConnection = New SqlConnection(connectionString)
Try
connection.Open()
Dim command As SqlCommand = New SqlCommand("sp_insertNewRecord", connection)
command.CommandType = CommandType.StoredProcedure ........................ etc.
Is the "Data Source=local" statement right for this case? If not, what is the right code statement for my case?
I know that by default asp.net 2.0 creates the aspnetdb sql express database for storing membership, role management, profiling etc. And I saw we have the aspnet_regsql tool to have this installed in a standard sql server. But what should I do to have these stored procedures, tables etc installed in an existing sql express database? Aspnet_regsql doesn't seem suited for that.
I've noticed some sql scripts in the framework folder like InstallCommon.sql, InstallMembership.sql, etc. They seem to be used to create the regular aspnetdb.mdf database, should I just modify those and run them against my own sql express database or is there a tool or an easier way?
I have been programming an application with VC++ 2005 and SQL Server 2005. I have converted an old 16-bit database to 32-bit managed code and SQL server and the application seems to be good. Now I want to deploy the application to another server for testing.
I have installed XP SP2, Windows Installer 3.1, Net framework 2.0 and SQL Server 2005 express to the test server. I have transferred the application with WI 3.1 and the program works well in the test server till the first SQL command. I have made a back up of the database and restored it in the test server. In the test server I can log in the database with Server Management studio and I can read the data there correctly. I have enabled both named pipes and TCP/IP for the database in the test server. With Surface Area Configuration I have enabled Local and Remote Connections Using both TCP/IP and named pipes. I only need Windows authentication at this time.
After all this when I come to the first SQL command in the application on the test server I receive the error message: An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 €“ Could not open a connection to SQL Server).
My connection string to the database is: 'connection->ConnectionString = "Persist Security Info=False; Integrated Security =SSPI;" "Data Source=TESTSERVER; Initial Catalog=TESTDATABASE;";'
When I use "Data Source=DevelopmentServer", the application works well on the development server.
Can't understand what is still wrong. Can you possibly have an answer for me?
I am having a problem connecting to a database I have with a java app I am creating for my senior project. I am using the latest MS JDBC for connecting to the SQL Server.
con =ds.getConnection(); } catch (Exception ex) { ex.printStackTrace(); }
The ds and con variables are declared and initialized correctly. The error I am getting now is this: com.microsoft.sqlserver.jdbc.SQLServerException: Cannot open database "*databasename*" requested by the login. The login failed.
I am having problems connecting to the database. I am trying to use Membership API and for some reason it will no longer connect to the database. I previously had Visual Studio 2005 Standard Edition and it worked just fine, until I tried to install MS SQL Express. I have tried the aspnet_regsql and sqlcmd InstallCommon.sql and both times I received a named pipe error. I look at the configuration and it said named pipes enabled.
I eventually gave up after trying for two days and removed MS SQL Express, but now I am still getting the same error. I tried to uninstall all of the SQL editions and reinstall the MSDE that comes with VS 2005, but I am getting the same error.
When checking the ASP.NET Web Application and testing the provider I receive the following error: Could not establish a connection to the database. If you have not yet created the SQL Server database, exit the Web Site Administration tool, use the aspnet_regsql command-line utility to create and configure the database, and then return to this tool to set the provider.
The security tab gives you the following error: There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store.
The following message may help in diagnosing the problem: Unable to connect to SQL Server database.
Running the sqlcmd in the command prompt I receive the following error: Sqlcmd: Error: Connection failure. SQL Native Client is not installed correctly. To correct this, run SQL Server Setup.
I want to use SQL Server to query an Access Database with about 40,000 rows of data. If possible, I don't want to upsize the database because others need acess to it in the ACC97 format. Is there a way to use ODBC to connect to the ACC97 database so that I can use the SQL query capability of SQL server to query the database.
I know access allows you to write some SQL queries but I need the power of the SQL server and now it is a matter of curiosity because I've been searching for this answer for about 8 hours.
I have a very basic console application whose sole purpose is to query a database on the same local computer. When i run the application, i get the error message below: Cannot open user default database. Login failed.Login failed for user 'someDomainSomeUserName'. Below is my connection string also myconnection_string = New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=C:Reporting SystemApp_Datasafetydata.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"). After some googling, some post pointed to deleting a user folder at : C:Documents and SettingsmyusernameLocal SettingsApplication DataMicrosoftMicrosoft SQL Server DataSQLEXPRESS but still deleting that folder and restarting the machine doesn't help and i also have remote connections enabled. Help is really needed. NOTE: The same application runs on a different computer with XP but fails on the Pc with windows server 2003.
I have SQL server express 2005 installed on my pc as instance SQLEXPRESS.
I have created a Visual Basic applicaion with the following as connection to the SQL server express 2005 running on the same PC: **************************************************************************************************** Dim lconnectionString As String Dim builder As New SqlConnectionStringBuilder Dim cmd As New SqlCommand Dim reader As SqlDataReader Dim parameter As SqlParameter builder("Data Source") = ".SQLEXPRESS" builder("Initial Catalog") = "" builder("AttachDbFilename") = "C:My DocumentsVisual Studio 2005Projectsabcabcabc.mdf" builder("Integrated Security") = True builder("User Instance") = True lconnectionString = builder.ConnectionString Dim sqlConnection1 As New SqlConnection(lconnectionString) cmd.CommandText = "SP_add_collection" cmd.CommandType = CommandType.StoredProcedure cmd.Connection = sqlConnection1 sqlConnection1.Open() *******************************************************************************************************************
It seems that i can not connect to the abc.mdf in SSMSE while the VB program is running. (ERROR: Database 'C:My DocumentsVisual Studio 2005Projectsabcabcabc.mdf' cannot be opened due to inaccessible files or insufficient memory or disk space. See the SQL Server errorlog for details. (.Net SqlClient Data Provider) )
If i connect to the abc.mdf first in SSMSE, then run the VB program afterwards, it gives me the error on this line -- sqlConnection1.Open()
I want to be able to access the abc.mdf database with both SSMSE and VB at the same time. Could anyone help me on this ?
I am new to SQL Server, but the current project that I am working on has the following requirement:-
1) Migrate the application (a servlet based web application on Apache Tomcat) from Solaris to Wintel 2) Migrate the supporting database from SQL Server 2000 to Sql Server 2005 3) Get IIS to communicate with Tomcat for serving servlet/jsp etc to the client
Though I successfully completed item 1 above, am stuck at item 2. Details are below
Actions taken for item 2
A. Installed MS 2005 B. Created new database in MS 2005 (logged in as user 'sa') C. Generated SQL scripts (such as create table table_A etc) from existing MS 2000 D. Genearted SQL scripts (such as insert into table_A etc) from existing MS 2000 E. Created new schema in MS 2005 F. Ran scripts C & D in the new schema. All tables are records populated. G. Obtained new JDBC driver and test run to see if connection is working fine, and it worked. Even ran an sql statment
Code Block[select count(*) from sa.table_A]
and got appropriate response.
H. When I made the application to talk to this new database (which is a copy of Production from step C, D above), it's behaving as though it cannot find the record. I. When I further debugged, I realised that the web application is excuting queries without mentioning the schema. For eg.
Code Block[Select firstName, lastName from table_A]
Or rather it assumes that the user connecting to database is same as the schema name.
J. To further ascertain my point, I ran the query
Code Block[Select firstName, lastName from sa.table_A]
and it worked!
Now the real problem is that I cannot modify the existing code to append a schema name and this approach is rather not recommended best practise.
I tried to match the user name with the schema name, even made this schema as default to the user. But still not finding any luck.
I request all you experts out there to help me out with this problem.
i am stuck in a strange situation. I have successfully built my application setup through InstallSheild 12. Which first installs SQL Express user define instance as a pre-requisite and then install my application files. First time when i run my application (without restarting the pc), it connects successfully with user define instance. But as i restart my PC and try to open my application, it is not connecting with database. i am using the following command line to install SQL Express 2005 user define instance:
if i change Remote connection to "using both TCP/IP and named pipes" through "SQL Server Surface Area Configuration" and then restart my pc again. My application connects successfully with Database.
Please guide me where i am getting wrong in building setup. do i have to add something in my command line to not get this error
i am having 2 sql servers one is web sql server server and other server is my local sql server. i am making web application through which i want to connect both sql servers at a time and by selecting data from web server i want to insert it into my local sql server both having same database on which i want to work , i want to know how it can be done my idea as follows in web.config i specify 2 connection string and by selecting data from websql server database table i going to store it in dataset and then i return dataset to another function which connects to local sqlserver database.but database records are much large. can any body guide me . i am going to place my web application on local server (C# asp.net 2.0) . thank you,
i tried this code c# file public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) {
//dr.Close(); //dbcon2.Close(); } web.config<configuration> <appSettings> <add key="abccon1" value="Data Source=comp01;Initial Catalog=abc;User Id=sa ; Password=sa"/> <add key="abccon2" value="Data Source=comp01;Initial Catalog=abctest;User Id=sa ; Password=sa"/> </appSettings> <connectionStrings/> this 2 databases are from single my loacl server it wont work it gives exception please healp me.
Help me please with one problem which I'm facing with while deploying java server application on my computer (this java app is jBilling). I have configured it as it was said in docs, I have added environment variable CLASPATH as Microsoft documentation said. I'm using SQL Server JDBC driver 1.2 by Microsoft. The result is that I find this message in log file:
2007-05-27 17:21:41,906 WARN [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] Throwable while attempting to get a new connection: null org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: com.microsoft.jdbc.sqlserver.SQLServerDriver; - nested throwable: (java.lang.ClassNotFoundException: No ClassLoaders found for: com.microsoft.jdbc.sqlserver.SQLServerDriver)) at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:168) ... and so on.
I have copied sqljdbc.jar to lib folder of the server. That's how I specified connection string:
Hi all, I want to do SQLCLR by Connecting to SQL Express User Instances in Management Studio via VB 2005 Express and I have read the following articles and books: (i) Connecting to SQL Express User Instances in Management Studio in http://blogs.msdn.com/sqlexpress/archive/2006/11/22/connecting-to-sql-express-user-insta... (ii) Managing SQL Server Express with SQL Server 2005 Management Studio Express Edition in http://www.microsoft.com/technet/sql/2005/mgsqlexpwssmse.mspx (iii) Chapter 16 - Going Beyand Transact-SQL: Using the SQL Common Language Rutime (SQLCLR) in Microsoft SQL Server 2005 Express Edition for Dummies (iv) Chapter 21 - Working with the Common Language Runtime in Microsft SQL Server 2005 Programming for Dummies (v) Chapter 4 - Introduction to Common Language Runtime (CLR) Integration in Programming SQL Server 2005 by Bill Hamilton. I want to create an SQLCLR project "HelloWorld" by Connecting to SQL Express User Instances in Management Studio via VB 2005 Express. But I am still not sure how to get it started, because I do not understand the following things: (1) Pipe Name for a User Instance, (2) Enabling (or Disabling) the CLR by using Transact-SQL, (3) Creating a Transact-SQL script, (4) Creating an Assembly, (5) Creating a backup device, etc. I need to see some simple examples of SQLCLR by Connecting to SQL Express User Instances in Management Studio via VB 2005 Express. Please help and tell me where in the websites I can find them.
Really confused ... I created 2 tables in a VB Express program (which went well). Problem is that I can't see/find those tables with MSME. I don't really understand how to connect the MSME to where the tables are. I created the tables under My DocumentsData and they are DBapp.mdf + DBapp_log.LDF and the tables are Items and Preferences. The VB application can "see" the tables OK.
Do I need to move the tables to C:Program FilesMicrosoft SQL ServerMSQL.1MSQLDATA (like the Adventureworks installation which I haven't done) or what?
We have a bought in application written in Visual Basic 6 using ADO 2.7 to connect to SQL Server. The application has two connections strings and uses internal logic to determine which of the two connection strings connects to a read-write database. It does something as simple as trying an update that makes no changes to a very small table somewhere.
Previously this application connected to a Mirrored Database hosted on two Windows Server Failover Clusters and SQL Server 2005.For the future the App will be connecting this application to a SQL Server 2014 Availability Group.The Availability Group is made up of four servers, in a cluster, two at one site on Subnet A and the other two at a second site on Subnet B. The Availability Group has been given a Listener with a DNS name of AGLISTEST on port 1433 with two Static IP addresses, one for each subnet.
Our Contractor has configured the Application’s connection strings to connect to the two Static IP addresses assigned to the AG. He is of the opinion that although ADO has zero understanding of an Availability Group, at least one of the Static IP Address will translate to the Availability Group primary server because it is a Cluster Resource and so act like a Cluster IP Address on Windows Server Failover Cluster; i.e. sort of mimicking the previous configuration. This does work and he has demonstrated it, however I can’t find any article that proves to my satisfaction this is intended behavior not something that accidentally works. If it is accidental behavior then that would be something that might stop working at an unexpected point in the future.
All the research I have found relates to connecting to the AG Listener name, and all the multi-subnet issues and Active Directory issues that go with connecting using what is a legacy client.So; the question is, is this translation / redirection of static IP Addresses assigned to an Availability Group listener documented and safe?
I tried to connect to SQL server 2005 express in LAN Using C# express
I got this msg the file \blablabla\blablabla.mdf is on a network path is not supported for database file.An Attempt to attach an auto-named database for file \blablablalablabla.mdf failed. a database with same name is exist, or specified file can not be opened, or its located on UNC share.
Is that mean : I can not connect to SQL server remotly using express edition of C# SQL server dosen't support connection in LAN
I tried to set all options like enable TCP IP connection and networks
by the way
The data has unquie name and it is located in shared folder and I can easly to connect to database like access with no problem
I am and have been using VC 6.0 for many years. Can anyone tell me where I can find documentation of connecting to SQL Express using this platform Thanks
I have SQL server express edition 2005 installed on my computer and using VB in MS Access to run some queries. The VB function looks something like this..
Dim dataRS As New ADODB.RecordsetDim cnnSQL As New ADODB.ConnectionSet cnnSQL = New ADODB.ConnectioncnnSQL.ConnectionString = "Provider=SQLNCLI;Server=.SQLExpress;Database=TestDB;Trusted_Connection=yes;" cnnSQL.Properties("Integrated Security").Value = "SSPI"cnnSQL.OpendataRS.Open "SELECT dbo_Table_1.* FROM dbo_Table_1", cnnSQL, adOpenStatic, adLockOptimistic
The code fails on the last line with message "Invalid object name 'dbo_Table_1'" (yes, I verified that the table actually does exist in the DB)
I must be doing something wrong with the connection string but all the things that I've tried so far haven't worked.. Can anyone offer any suggestions?
Hey everyone, I'm having trouble connecting to my sql express instance through my vb.net application. I can connect to it from Visual Studio and the management tools, but get an error when connection with a connection string. What should my connection string look like? I'm using the a default SQLEXPRESS instance.
I have created a Web application that uses a SQL Express file Database (mdf). I have also created a console application that looks to the (mdf) in the Web Directory to process some server-side tasks, (Email, process data, etc). Everything works well on my Development Machine, however when I Publish my Web App and Console application to a server, the Web App works fine, the Console App is buggy. The main error I get is ;that the user logged into the server cannot access the Database. (User domcholman cannot access). However this is not always the case, sometimes it works. Question is, how does SQL Express authenticate credentials when in Windows Auth mode? Shouldn't it allow the Service account to access the database? Are there any best practices? Should I use an account and password instead? thanks...
I have a small ASP.Net application developed in VS 2005 that I would like to deploy with SQL Express.
I have included the MDF file in the Application and added SQL Express as a pre-requisite for the Setup and Deployment project.
It installs SQL Express but when it tries to connect I receive: "This is not a valid login Cannot open user default database. Login failed. Login failed for user 'NT AUTHORITYSYSTEM'."
I don't seem to have any options using the "prerequisite options in VS 2005 in terms of command line deployment parameters.
Likewise I would prefer to attach the database to the instance (because I need to write a connection string from a PDA using RDA and I have zero clue how to do RDA directly back to the file).
