[C#] VS2012连接SQL Server2012数据库的连接方式

</pre><pre name="code" class="csharp">SqlConnection conn = new SqlConnection("server=服务器名;database=数据库名;user=用户名;password=密码;");
try
{
查询
conn.Open();
string sql = "select * from table";
SqlCommand sc = new SqlCommand(sql, conn);
SqlDataReader sr = sc.ExecuteReader();
sc.Read();
int id = sr1.GetInt32(0);
插入
string sql = "insert into values (@Id,@Class)";
SqlCommand sc = new SqlCommand(sql, conn);
SqlParameter para1 = new SqlParameter("@Id", SqlDbType.Int, 4);
para1.Value = id;
sc.Parameters.Add(para1);
SqlParameter para2 = new SqlParameter("@Class", SqlDbType.NChar, 20);
para2.Value = classs;
sc.Parameters.Add(para2);

sc.ExecuteNonQuery();
conn.Close();
}