I can't find how to do this on google anywhere. How do you save to a SQL DB using just C# code? Is it possible? The save method that comes default when you create a DB using the wizard dosen't actually save the DB:
this.Validate();
this.studentsBindingSource.EndEdit();
this.studentsTableAdapter.Update(this.studentsDataSet.FirstClass);
It looks to me as though you are doing it correctly.
You should check your table adapter and verify that there is an update statement assigned. If you're using sprocs and only have the select sproc assigned then it'll be read only (and won't prompt you for the update/insert/delete sprocs).
Your connection string can be a few things depending on how you are configured to log into SQL.
Data Source=ServerName;Initial Catalog=DatabaseName;User Id=myUsername;Password=myPassword;
or
Data Source=ServerName;Initial Catalog=DatabaseName;Integrated Security=SSPI;
The latter is if you are using Windows Authentication; i.e. using the same user account you log into windows with.
DataSource is usually your machine's name or you can use (local) to get you over the hump should it be on the same machine you are working on.
Related
I have a winForm application which will be used by more than one persone, I want to put the database in a machine server so can everyone connect to it from this application.
I'm using SqlServer database, this database will be located in a local network.
This is the connection string I use to get data from a database located in my machine
string con = "Data Source=MSSQL1;Initial Catalog=AdventureWorks;Integrated Security=true;";
My question is what is the connection string that I should use to get data from database located in a machine server ?
Is it something like this ?
Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;
Thanks.
Without any specific information nobody will be able to answer this for you, however This Resource. might help you find it for yourself.
I have a SQL CLR stored procedure written in c# (.NET4). Its purpose is to allow a trigger on a table in a SQL Server 2012 database to call a web service which then processes the data in that table.
However, there are several different databases which will all have triggers using this assembly. My web service needs to know which database is triggered the call to it in order to know where to get the data from.
I could simply add a parameter to my stored procedure but I want to keep things simple from the database side. Is there any way, in .NET, to obtain information about the database to which the assembly is attached?
Aah, found one:
This still opens a context connection to the database, but it's about the only way I can see.
using (SqlConnection conn = new SqlConnection("context connection=true"))
{
conn.Open();
string dbName = conn.Database
}
That's from an MSDN article. Also, the MSDN article on Context Connection.
I have a SQL Server database located at http://192.168.10.3/MyDB. I have created a C# MVC application, and I need to know the steps to connect my application to the above database.
Is it only replacing the connection string in the web.config file ?
Data Source=?? ;Initial Catalog=??;Integrated Security=SSPI;
User ID=??;Password=pwd;
If so what am I to replace where I have placed the ?? sign ?
DataSource = 192.168.10.3
Initial Catalog = MyDB
User ID = whatever sql login you are using to access your SQL Server
Password = password for the sql login above
The other answers here are good. In addition, ConnectionStrings.com can be your friend, especially if you are going to connect to various types of databases in the future. Select the database that you need to connect to and then you'll see the different connection strings you can use for that database.
http://connectionstrings.com/sql-server-2012#sqlconnection
you can try this
create a new text document on your desktop - conn.txt
change file extension to udl (conn.udl)
double click to open the file in the first tab select appropriate provider
4 . in the second tab enter server name (ip address,port), username, password (check Allow saving password) and database name.
test connection
if the test reports success close the window.
open the file with notepad, copy everything but the provider name and paste it back to connectionString
Below is connection string you need for:
Data Source="192.168.10.3" ;Initial Catalog=MyDb;Integrated Security=SSPI;
User ID=sa (for example);Password=whatever you set before;
I'm making an ASP.net with c# webapp using VS 2008, and I added a new sql database item to my project. I added tables to the databse. In the database explorer the test connection works. I guess I have two questions. One:In the application, how does one connect to the database using a connection string? or what connection string should I use? Second: How do I add a username and password to the database?
Right now I'm using this connection string in the web.config file, but when I run the app it times out and says it can't make a connection. The error is on the conn.open line.
add name="ReportsConnectionString" connectionString="Data Source=(local); Initial Catalog=REPORTS;Integrated Security=True" providerName="System.Data.SqlClient"
I have this code in one of my page's codebehind.
string sqlquery = "SELECT * FROM reportitems";
using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["ReportsConnectionString"].ConnectionString))
{
conn.Open();
using (SqlCommand comm = new SqlCommand(sqlquery, conn))
{
using (SqlDataAdapter adapter = new SqlDataAdapter(comm))
{
DataSet ds = new DataSet();
adapter.Fill(ds, "reportitems");
DataRowCollection dra = ds.Tables["reportitems"].Rows;
foreach (DataRow dr in dra)
{
string DRZ = dr[0].ToString();
//more stuff here
}
}
}
}
Usually SqlServer Express is reachable on your local PC using this syntax for the Data Source parameter yourpcname\SQLEXPRESS. To be sure start Management Studio and look at the Server Name request.
For the security part of your question, I suppose that you don't want the Integrated Security option (Windows User), but you want a SQLServer user. In this case you could use the User ID and Password parameters for the connection string:
Data Source=MYPC\SQLEXPRESS;Initial Catalog=REPORTS;User Id=MYNAME;Password=MYPASS;
However, this works only after you have added this user to the SQLServer.
You could use the interface of Management Studio app or you could execute a script like this
USE [master]
GO
CREATE LOGIN [MYNAME] WITH PASSWORD=N'MYPASS', DEFAULT_DATABASE=[master]
GO
USE [REPORTS]
GO
CREATE USER [MYNAME] FOR LOGIN [MYNAME]
GO
The Integrated Security=True part of the connectionstring means that the server will use the credentials of the app pool running the site, and you don't need to specify username or password. The app pool identiy will, however, need to have access to your database.
Visit http://www.connectionstrings.com/ for a good primer on various ways to set the connection string for various applications. That'll show you why (local) didn't work but .\SQLEXPRESS did and how to add username and password to it. Here's an example lifted from http://www.connectionstrings.com/sql-server-2008
Data Source=myServerAddress;Initial Catalog=myDataBase;User
Id=myUsername;Password=myPassword;
As others have said, you need a SqlExpress engine running as .mdf is not a flat file. It is a SQL server express database file and you need to connect to it.
But what have not said is that a Database in your App_Data folder needs to be attached to the SqlServer instance. This step is only done once in the first connection.
In http://www.connectionstrings.com/sql-server-2008 you will find an example in the "Attach a database file, located in the data directory, on connect to a local SQL Server Express instance" section that looks like this:
Server=.\SQLExpress;AttachDbFilename=|DataDirectory|mydbfile.mdf; Database=dbname;Trusted_Connection=Yes;
Also you can read this: http://msdn.microsoft.com/en-us/library/ms247257.aspx
I believe that you will need to run some scripts and stuff like that to create a user and assign permissions to this user in this database, and then change the connection string (once the database attached), so I don't see a point in having the database in the App_Data folder. I believe it should be better if since the beginning you create your database using the SqlServer tools and connect to it from your application.
I have a SQL Server 2008 database that uses a default schema called "Arxame". How do I specify or change the default schema from "dbo" to "Arxame" in my connection string? I'm using C# and ADO.NET.
You can't do that. You have to set the schema "Arxame" to the user you have specified on your connection string. You can do this using the SQL Server Management tool
If you need to change the default schema for an existing user you can do it like this
B. Changing the default schema of a user
The following example changes the default schema of the user Mary51 to Purchasing.
USE AdventureWorks2008R2;
ALTER USER Mary51 WITH DEFAULT_SCHEMA = Purchasing;
GO
Source: MSDN
The InitialCatalog is indeed the database name. The schema that is used would depend on the user you specify, since schemas typically map to database users. Whatever user owns the Arxame schema is the one you should specify in the connection string.
I do not believe you can do this within a connection string, nor should you be able to. You use schemas, in much the same was as a namespace in C#, to further resolve securable objects within a database when there may be name collisions.
Schemas in SQL Server 2005 and up
The initial schema must be set in your connection string:
Data Source=localhost;Initial Catalog=Arxame;Integrated Security=True
Remember to use Integrated security only if you are using a Local Sql Server.