Connection String in Asp.Net

In WEB CONFIG....


SYNTAX

<add name="ConnectionStringName"  connectionString=YourServer"; Initial Catalog=YourDB; Integrated Security=True"/>

  

 EXAMPLE :

<connectionStrings>
<add name="Con" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient"/>
</connectionStrings>

We can use this connection string in our project.....


1.First Method

SqlConnection con = new SqlConnection("data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" );
SqlCommand cmd = new SqlCommand("Write your sql query here eg. select * from Table name");
con.Open();
DataSet ds = new DataSet(cmd,con);
SqlDataAdapter da = new SqlDataAdapter();
da.Fill(ds);
con.Close();

 

 

2.2nd method

 

 

 
<connectionStrings>
    <add name="ConnectionStringName" connectionString="Data Source=localhost\sqlexpress;Initial Catalog=DatabaseName;User ID=username;Password=password" providerName="System.Data.SqlClient"/>
</connectionStrings>
 
 
 
Add a Class File
 
 
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
 
public class WFDFeedsNews
{
    SqlConnection con=new SqlConnection();
    SqlCommand cmd=new SqlCommand();
 
    public createConnection()
    {
 
            con = new SqlConnection(ConfigurationManager.ConnectionStrings                                                             ["connectionStringName"].ConnectionString);
}
 
 public insertData(int id,string name)
    {
 
            con.Open();
 
            try
            {
 
                cmd = new SqlCommand();
                cmd.Connection = con;
                cmd.CommandText = "INSERT INTO (userID, HeadLine)
                       VALUES (@id,@headline)";
 
                cmd.Parameters.AddWithValue("@id",id);
                cmd.Parameters.AddWithValue("@headline",name);
 
                int result=con.executeNonQuery();
 
            }
            catch (Exception ex)
            {
 
            }
            finally
            {
                con.Close();
            }
 
        }
 
    }
 
}
 
Pass data from aspx page to this code...