Method to connect to SQL Server database:
1. Reference the System.Data.SqlClient namespace in the program
2. Write a connection string in the format: Data Source=server name; Initial Catalog=database name; User ID=user name; Password=password Among them, Data Source specifies the server name, Initial Catalog specifies the database name, User ID and Password respectively Specify the username and password for the connection.
3. Create a SqlConnection object and pass in the connection string parameters, as follows: SqlConnection conn = new SqlConnection("Connection string");
4. Open the database connection conn.Open();
5. Execute SQL statement or stored procedure SqlCommand cmd=new SqlCommand("SQL statement or stored procedure name", conn); //Execute SQL statement or stored procedure 6. Close the database connection conn.Close(); The following is a complete Sample code to connect to the database:
using System;
using System.Data.SqlClient;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string connStr="Data Source=.;Initial Catalog=test;User ID=sa;Password=123456";
SqlConnection conn=new SqlConnection(connStr);
try
{
conn.Open();
SqlCommand cmd=new SqlCommand("insert into t_user values('test','123456')",conn);
cmd.ExecuteNonQuery();
Console.WriteLine("数据插入成功！");
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
conn.Close();
}
Console.ReadKey();
}
}
}