Database connectivity to sql server asp.net

DATABASE CONNECTIVITY

Programming : C#Technology : Asp.netDatabase : MS Sql Server

Author : Hemant Sankhla (Web Developer)

I will teach you how to connect MS Sql Server

Database to an Asp.Net Web Application using

C#. After the successful connection you are able

to perform various operations on database from

your web application like select, insert, update,

delete etc.

Lets check it out and do yourself.


First of all Create Database in MS Sql Server

1. Go to Database > Right Click > New Database. And

give a name to your Database.

2. Now Create a table in this database. To do such

select the database > Right click On Table > New Table.

Now enter desired fields and save it using ctrl + s.

Now your database with tables is ready to be a part of

your web application.


Create The Connection String (Path to server and

database)

Connection string means the address to the Sql Server and The database

using the security access, or if there is an username and password then

providing these credentials for accessing the server and database.

Now type below line in ‘web.config’ file which you have in your website

directory, search for it in Solution Explorer. If we make connection in

‘web.config’ file then we only have to make it once and we call it where

we want it.

<connectionStrings>

<add name = "con" connectionString="Data Source=.\

sqlexpress ; Initial Catalog=Database; Integrated

Security=true"/>

</connectionStrings>


Create The Connection String (Path to server and

database)

name : The name of your connection

ConnectionString : The full path or address to your server and

database

DataSource : Sql Server Name (you can get this in Sql server

management studio. Copy the server name from the connection dialog

box at starting.)

Initial Catalog : Your Database.

Integrated Security : True, use this if you have no username and

password in sql server.


Using NameSpaces

Namespace is a collection of classes and methods. In C# various

namespaces are used in different work. Here we want to connect

and use the Sql Server so we have to use appropriate

namespaces for this task. Namespaces are used by the ‘Using

keyword.’

Add these two name spaces.

using System.Data;

using System.Data.SqlClient;


Using NameSpaces

Namespace is a collection of classes and methods. In C# various

namespaces are used in different work. Here we want to connect

and use the Sql Server so we have to use appropriate

namespaces for this task. Namespaces are used by the ‘Using

keyword.’

Add these two name spaces.

using System.Data;

using System.Data.SqlClient;

using System.Web.Configuration;


The Essential CodeBelow is the essential code for all type of operation.

SqlConnection con = new SqlConnection

(WebConfigurationManager.ConnectionStrings["con"].ToString( ));

con.Open();

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;


Understanding The Code

SqlConnection : This class creates a connection object. Con is

the object for connection.

WebConfigurationManager : This class fetch the connection

string from the web.config file.

Con.open( ) : Open the current connection.

SqlCommand : Create the Sql command Query’s object.

Cmd.connection = con : Supply the con object to the cmd

connection.


Select All SqlConnection con = new

SqlConnection(WebConfigurationManager.ConnectionStrings["con

"].ToString());

con.Open();



cmd.CommandText = "select * from Table ";

SqlDataAdapter da = new SqlDataAdapter();

DataSet ds = new DataSet();

da.SelectCommand = cmd;

da.Fill(ds);


Insert Into SqlConnection con = new

SqlConnection(WebConfigurationManager.ConnectionStrings["con"].ToStri

ng());

con.Open();



cmd.CommandText = "insert into Student (FullName, Marks) values ('" +

txtName.Text + "','" + txtMarks.Text + "')";

int h = cmd.ExecuteNonQuery();

if (h > 0)

{

Response.Write("Inserted Successfully");

}


Update Record SqlConnection con = new


ng());

con.Open();



cmd.CommandText = “update Student SET FullName = '" +

txtName.Text + "', Marks = '" + txtMarks.Text + “’ where ID = ID;


if (h > 0)

{

Response.Write(“Record Updated Successfully");

}


Delete Record

SqlConnection con = new


ng());

con.Open();



cmd.CommandText = “delete from Student where ID =‘ ” + ID + “ ‘;


if (h > 0)

{

Response.Write(“Record Deleted Successfully");

}


Now you have to practice those codes by hand. If you feel any trouble

comment me

These codes also work well in C# Windows Desktop Application.


Database connectivity to sql server asp.net

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