using System.Data;
using System.Data.SqlClient;

public DataTable StudentView()
{
    SqlConnection sqlCon = new SqlConnection(@"Server= localhost\SQLINSTANCENAME; Database= DBNAME; Integrated Security=True;");

    SqlDataAdapter sqlDa = new SqlDataAdapter("QUERY", sqlCon);

    DataTable dtbl = new DataTable();
    sqlDa.Fill(dtbl);

    return dtbl;
}