How To Programatically Connect To An SQL Database?
Nov 18, 2006
Can anyone please direct me to an easy to understand Description, Article or Video tutorial that shows an example on how to programatically connect to an SQL database and retrieve data from a collumn using C# and VISUAL WEB DEVELOPER 2005 EXPRESS EDITION. Also, what namespace should be imported to do this? (From what I have gathered out of the help, it seem that System.Web.UI.WebControls is the one)
I am trying to create a "news letter" web page. I have a basic form and when I hit "send" then the code in the background should access the database with all the recipient info, and retrieve all the E-mail addresses, Names, etc. and include it in each e-mail.
( I don't know if it is just me, but the help included with VISUAL WEB DEVELOPER 2005 EXPRESS EDITION is extremely difficult to understand - from a beginner point of view).
Thanks!
Regards
Jan
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May 15, 2008
Hi Guys,
I am trying to figure out a way to restore a database programatically. Here is how I do it now. Right click on the database, select Restore. Browse out to my computer and find the .BAK file. Select the database and go into 'Restore Options' I have to physically change the .MDF and .LOG paths since I am getting this backup is not coming from my computer. I select 'Overwrite the existing database' then click restore.
My problem is that I have to change the paths to the MDF and LOG files. How could I automate this? Thank you!!
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Jul 23, 2005
use this-is-a-stupid-namereturns an errorFor that matterselect *from this-is-a-stupid-name.dbo.anytablereturns an errorI've tried single quoted, double quotes, escaping. In the SQL editor I canselect the name from the dropdown and I'm OK - but I'm writing a perlscript to connect to the database.I didn't create the database and don't know how it was created.--Message posted via http://www.sqlmonster.com
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Jun 27, 2001
I am crateing the database on the fly using db directory in VC++. I am able to create database. I am also able to create login. These can be easily done by logging as master using the username and password sa and "" resp. Now I want to add a user to the database that i created. but it is being added to the master database. I know that I have to change my login from sa ,"" to the username and password that i gave during login. but i dont know how to change the login. Please help. If you have any code for that then that will be of great help.
Hoping to get a positive response as soon as possible..
Thanx
Nitin Gulati
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May 2, 2007
Hello All,
I am working on constructing a software layer around some features of the RDL language that would allow me to programatically generate reports.
I am reading the RDL specification language, and I do not understand three things:
1) How the DataSet element is populated by the query or more precisely how do the <Field> elements capture all the rows inside the table that is being queries?
To my understanding I wilkl have to define several fields that correspond to all columns of interest in the query.
But that is only for one row (?!) How do the rest of the rows get populated? Does the server recursively create new rows based on my definitions until it matches row for row all the data in the table?
2) Once the elements are inside a DataSet how do make use of that data to render it in a table.
I understand how the DataSource, DataSet, and Table work individually, yet I do not understand how to establish a flow of data between DataSet and Table.
3) Do I even need to use a <Table> as an RDL element in order to organize the data in an excel table?
I would appreciate any help. Thank you!
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Oct 9, 2006
I have an application that creates a new database during installation,and I've noticed some strange behavior. Once I've created thedatabase, I am able to immediately create tables and populate lookupdata, provided I remain connected to the server. If, however, Idisconnect and attempt to reconnect immediately, I'll get an errorsaying that my login is invalid for the new database.I can get around this by having my code simply wait 5 seconds beforeattempting to reconnect, but I'm curious to see if anybody here cangive an explaination for why this is happening. Here is a bit ofpseudo code to explain what I'm seeing:open new connectioncreate databasecreate tablespopulate tablesclose connection// open new connection /* can't do this yet, as it would break */for (int a=0; a<5; a++){Thread.Sleep(2000)try{open new connectionbreak;}catch{Debug("still waiting...");}}Running my version of this code, I'll see that "still waiting..."message go past 2-3 times before SQL Server wakes up and realizes thatI'm allowed to connect to it. Anybody know why?Thanks,Jason KesterExpat Software Consulting Serviceshttp://www.expatsoftware.com/---Get your own Travel Blog, with itinerary maps and photos!http://www.blogabond.com/
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Jun 14, 2006
I was able to connect to the SQL Database Pension with table clients with table values: ID, State, Name.'Create(connection)Dim conn As New Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)'open connectionconn.Open()However, I'm not sure how to insert a new row with an incremental ID number and a new State and Name.Sorry, I'm really new with VWD.
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Jul 16, 2006
Database not found !
My web.config file has this bit of code:
<connectionStrings>
<add name="AppConnectionString1" connectionString="Data Source=".SQLEXPRESS";AttachDbFilename="C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLDataAdventureWorks_Data.mdf";Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
But........................... the is no "AdventureWorks_Data.mdf" in that folder ?
And the database is installed in the right place !
help !
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Aug 10, 2006
I am new to windows apps in .net 2.0. I am trying to create a windows service that will connect to a database and email info out to people that have had status changes.
Right now, I can not connect to the database. Here is the connection string:
Private cnn As New SqlClient.SqlConnection("Data Source=IPAddress;Initial Catalog=TheServer;Persist Security Info=True;User ID=userid;Password=password provider=SQLOLEDB.1;connect timeout=3600")
This is how I am trying to connect:
cnn.Open()
myCMD.CommandTimeout = 0
dr = myCMD.ExecuteReader
I keep getting an error message that I can not be logged on. I know that the credentials are correct because I use them for the web app. Something has to be wrong with my connection string, but what?
Thanks,
enak
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Sep 1, 2006
I'm using Visual Web Developer and SQL 2005...It Guives me this error...: 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) I'm tired of guetin and search solution for this errorI've tried everything that i searched over the "net"...made all the configurations possible in sql server 2005 and nothing...Is this right? Or do i need to put some more code in this line or in server is it "localhost:****...: ...connection = New SqlConnection("Server=servernameWebSite1uid=sa;pwd=1234;database=cdcollection")connection.Open()...... Don't know why in sql server i have two object explorer connections when i start the sql server...one is "servername"...two is "servernamesqlexpress" (but when trying to connect with "servernamesqlexpress" it won't let me, only with "servername")...i use the windows authentication......when i had the VB.NET 2003 and SQL Server 2000, it was much easy to do this... In ASP.NET config i still have the C:inetpubwwwroot path but the files don't go there...now they go to my documentsVisual studio 2005 by default of Visual Web Developer prog. Do i need to change the location? Please help...i'm really desperate...with this...
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Nov 1, 2006
I am developing my first website for my boss. I am trying to connect to an access database which I have created a DSN for on the server. I am using the following code sample.... //Connection String 1string dsn_name = "access_WALLINVEN.dsn";string sDSNDir = Server.MapPath("_dsn");string connectstr = ("Data Source="+ (sDSNDir + ("\" + dsn_name)));//Connection String 2string connectstr = "Data Source=/jwallpaint/_dsn/access_WALLINVEN.dsn;Uid=jwallpaint;Pwd=J2512wall;";string commandString = "Select * from Inventory";//Pass strings to sqlDataAdapter constructorSqlDataAdapter dataAdapter = new SqlDataAdapter(commandString, connectstr);//Create a datasetDataSet dataSet = new DataSet();//fill the dataset objectdataAdapter.Fill(dataSet, "Inventory");//Get the table from the datasetDataTable dataTable = dataSet.Tables["Inventory"];//Bind to the gridviewGridView1.DataSource = dataTable;GridView1.DataBind();For Connection String 1 I get the error of...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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) For Connection String 2 I get the error of...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) I am not sure which connection string to use either....It is strange to me that I get this error talking about SQL Server when I am trying to reach my Access database......Any Help?? Thanks....
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Nov 17, 2006
Hi,
I'm on lesson 7 of the Bob Tabor video tutorial called 'Data binding to user interface controls'. Whenever I try to add an SQL database (add new item/sql database) I get the following error message:
TITLE: Connect to Server
------------------------------
Cannot connect to ALFIESQLEXPRESS.
------------------------------
ADDITIONAL INFORMATION:
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)
I have VWD installed, sqlexpress installed, everything really.
Any help would be appreciated.
MD
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Nov 30, 2006
I am attempting to connect to a database that has been uploaded to my server from my webpages on the server. This is the connection string that is currently used:
connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|Restaurants.mdf;Integrated Security=True;User Instance=True"
When attempting to connect to the database I receive this 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
I realize that I cannot make a remote connection using SQL Server 2005 Express Edition, but cannot find the proper connection string for it to connect to the uploaded database.
Accessing the database doesn't require a log on by the user as all the information is public.
The authentication mode in the web.config file is set to "Forms".
If there is any other information required so that this problem can be solved, please ask for it.
Thank you in advance,
Me
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Apr 17, 2007
when i run application from visual studio im getting this error. Server Error in '/' Application.
Cannot open database "Products" requested by the login. The login failed.
Login failed for user 'GAMERKALESH'. when run from web browser: Server Error in '/' Application.Cannot open database "Products" requested by the login. The login failed.Login failed for user 'GAMERASPNET'. my comp name is: Gamerand acc name is : Kalesh using Microsoft Studio Server Management studio express i have added these accs:in security of databas products: ASPNET and IUSR_GAMER in general security i have added accs: GAMERASPNET and GAMERIUSR_GAMER using windows authentication.
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Sep 11, 2007
I just did a ton of work in SQL Server Management Studio Express and now I want to access the database from a Web Developer 2005 Express Edition application. Can't find any documentation on how to connect to the database from vwd. Any assistance would be appreciated. Thanks, Tom
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Sep 21, 2007
Ok I have several sites on a server that have connected to databases on a different server for a long. Out of the blue today none of the sites on the server can connect to any databases on the other server. However, sites on other servers can connect to databases on the same db server.This is the message I get: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)The database server runs SQL Server 2000 not 2005 I can connect to the database from desktop (with an asp.net application or sql server management studio), I can ping the database server fine from the production web server, but my applications can't connect for some reason. There is nothing in the event log to suggest a problem, any ideas what could be causing this?
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Sep 30, 2007
Hello,
I have posted awhile ago about this issue, but after taking the advice and trying to get help from GoDaddy, nothing has worked yet. I am using the user login control, and then I changed the connection string in the web config file according to what Go Daddy's help file said, making sure to make proper server, id, and password names. It still won't go through, can anyone help?
Thanks
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Oct 25, 2007
I am new learner of ASP.NET and coding in C#.I am not able to connect the SQL database.I have written the code for connection of database but to write the connection string web.config file is neccessary which is not apearing in my application. Please help me .Here is code I have written.
string sCon = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();SqlConnection oCon = new SqlConnection(sCon);
try
{
oCon.Open();string sQuery = "Select Offering1,Offering2,Offering3 from Offering";SqlCommand oCmd = new SqlCommand(sQuery, oCon);
oCmd.ExecuteNonQuery();
DataSet oDs = new DataSet();SqlDataAdapter oDa = new SqlDataAdapter(oCmd);
oDa.Fill(oDs);
DataList1.DataSource = oDs;
DataList1.DataBind();
} catch (Exception ex)
{
ex.ToString();
}
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Jan 4, 2005
I recently uninstalled SQL Server due to connection issues I started having. I could start the DB and connect/edit tables in Ent Mgr etc, but all the sudden, none of my code could make DB connections.
So, after reinstalling now nothing works. I cannot even connect in Ent. Manager. I went to Administrative Tools->Services to make sure it was running, and SQLSERVER isn't even listed under services. What happened? Is there another step after installing SQL Server I missed to get the service up and going. Do I need to do something in ODBC connections?
I am on Windows XP with SP2.
Tim
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Jan 16, 2005
Hello I am new to the ASP.NET project and using Microsoft ASP.Net Web Matrix. When I try to connect to an Access Database it is no problem, but do I try to set up an connection with a SQL or MSDE database there is a problem.
It can not connect with my SQL server and gives the error:
Could not create new database.
What can be the problem. My MSSQL Server is running perfect.
Greets
Ben
Holland
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Aug 7, 2005
i design a web site by vs.net 2003 and i connect to sql database its name rayan but when build my webfrom a error show this is system.data.sqlclient.sqlexception:login faild for user "rayanaspnet" please help me
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Apr 25, 2006
Greetings,
A newbie needing some guidance. We have SQL running on our Windows 2003 server. When I connect via the Enterprise manager I have two instances of SQL running.
SRV01ACT7 (Windows NT)
SRV01WEBAPP (Windows NT)
When I click on the ACT instance I get the following error:
A connection could not be established to SRV01/ACT7
Reason: Login Failed for user xxxxadministrator.
Please verify SQL Server is running and check your SQL Server registration properties.
I only get the message when I try to connect to the SRV01ACT. The connection to SRV01WEBAPP works fine.
I checked with SQL server manager and both instances are running and no one has reported any problems connecting to either one of them.
The way it acts, its as if SQL server has lost the ability to authorize a connection via the windows account. As if it has lost its associatoin to the administrator account. So while the instance still runs and is functional, I just can't connect to it and manage it.
I have connected via remote desktop from a WinXP machine and the server console. Both end up with the same error.
Can Someone give me step by step instructions on how to correct this?
Any help please!!!
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Sep 24, 2007
Update: I got it working. I had to create an odbc connection on my machine (guess I forgot to do that this time).
I copied a SQL 2005 database from another machine (detached it first. I can connect directly in SFT SQL Server Mgmt Studio, but I cannot connect from VFP using SQLCONNECT(). I've overlooked something. My login is the db_owner and everything else. Any ideas? SQL Server is running on the same machine that I have VFP9 on. It is setup for both SQL Server and Windows Authentication and I can connect to every other database I have attached.
TIA,
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Mar 26, 2008
I can't connect to a SQL Server 2000 database.
I opened SQL Server 2005 Management Studio and tried to connect. In the Connect to Server dialog box, when I go to the Server Name dropdown and browse for my database server on the network, the server is not in the list. (A different SQL Server 2000 database server does show up there.) I tried manually entering the server name (and password, etc) but it doesn't connect.
When I go to the server, the db is running and apps that use it work fine. I can ping the server, and I can map a drive to it.
I can't connect using Visual Studio 2008 either. When I try to create a SqlDataSource in Visual Studio the db server isn't in the dropdown list. Also, when I manually create a connection string it doesn't connect.
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Aug 1, 2015
I cannot connect to Sql server 2014.
Error message:
TITLE: Connect to Server
Cannot connect to ANILWORKPC.
ADDITIONAL INFORMATION: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 2). URL....
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Nov 1, 2007
Hi I recently installed SQL server but I can't connect to the database. The error message is "under the configuration SQL server does not allow remote connections". What does this mean? I have already followed Step 1, 2 and 3 in the FAQ but I got the same error message. I had enabled TCP/IP. I have changed the values in IPALL and I have added SQL to the firewall exceptions list, but I still can't connect. And I don't understand, isn't the server on the local computer, so what does it means by "remote connections"?
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Dec 31, 2007
Hi,
with the Visual Studio(Add New Data Source) i was able to add a SQL Compact 3.5 database to my desktop-project. Everything seems to be ok: dll assemblies, location of the database in my application folder...
But when trying to connect to the database like this:
SqlCeConnection _conn = new SqlCeConnection();_conn.ConnectionString = Properties.Settings.Default.MyDatabaseConnectionString;_conn.Open();the debugger comes up with this message:
'The file name is not valid. Check the file name for the database. File name = |DataDirectory|MyDatabase.sdf ]
i also tried to add the database path manualy. SqlCeConnection _conn = new SqlCeConnection(@"Data Source = C:MySQLCompactMyDatabase.sdf");_conn.Open();Then i get:Invalid provider type. [ Db version = 3004180,Requested version = 3004180,File name = C:MySQLCompactMyDatabase.sdf ]What's wrong? I'm using VS2005 and Vista 64. Thanks for your help, i'm new to SQL...'
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Nov 3, 2007
Could someone help me with this error:
"Under the default settings SQL Server does not allow Remote Conections." I have SQL installed in my personal machine and I want to connect to "Local" DataBase.
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Sep 19, 2005
Carlos writes "I am trying to create a sp that would jump from one DB to another using the USE command. I built a string and then I tried to run EXECUTE(@SQLString) with no lock. This is the sample code I am using:
declare @DBName varchar(200)
declare @SQlString varchar(300)
set @DBName='model'
set @SQlString = 'use '+@DBName
execute(@SQlString)
Is there any way I can accomplish that?
Thanks
Carlos"
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Sep 16, 2005
Using ADO.NET Or regular queries on SQL Server, is there a good way ofdetermining if a Stored Proc will be returning a result set or if it isa non-query that does all I/O through parameters?Thanks.
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Dec 27, 2007
Hi
I have a main report and sub report. The subreport has some fields like SYS, LOC, MSG etc.
But the report should display the values filtered basis on system. i.e. I must have a sub report
for SYS1 , SYS2 , SYS3 and so on. I can create a sub report for each system. But I want to create only subreport and
call them from the main report. How do I do this?
Thanks
Sai
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Oct 21, 2006
Hello I am fairly new to ASP.NET but have done all the beginer tutorials. I am able to make simple programs such as the Atlas enabled Tasklist locally and now trying to setup remotely. I have setup a free educational Brinkster account and trying to display information from the brinkster database to a gridview form. However I am not sure how to define the connection to the database. Can anyone help me. Thanks
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Feb 16, 2007
Hi everyone.Please Help Me.Asp.net using C#.Net and Backend Sql server 2005.1. How to conection 2 table at the same time.in c#.net.2.How to Insert,update and delete for 1 or 2 table connections. all the code give C#.Net in asp.net.Thanks.
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