Need information on the connections for sql used in asp.net C#

Question

I'm totally new to asp.net C#. I need information on how to make SQL connections. I google it and got some of the information on connecting to database. I need the explanation such as what exactly SqlConnection con does and what exactly SqlCommand cmd means.

And the commands such as

con.Open()
DataSet ds = new DataSet(cmd,con)
SqlDataAdapter da = new SqlDataAdapter()
da.Fill(ds)
con.Close()
// etc. 

Where do i find the explanation on this commands? Also please help me with all the commands which i would need to learn to make connections with SQL. Could you please help me out with this. Thanks in advance.

Answer 1

SqlConnection : http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection%28v=vs.110%29.aspx

SqlCommand : http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand%28v=vs.110%29.aspx

Check this site : Connect ASP.NET WebSite to SQL Database

How to establish database(SQL) Connection using c#?

Thanks.

Answer 2

Here is a complete and simple tutorial about ADO.Net.

Good work!