using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.SqlClient;
using System.Data;

/// <summary>
///SQLHELPER 的摘要说明
/// </summary>
public class SQLHELPER
{
    public static string connstr = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True";
    public static void runsql(string sqltext,string returntype,params SqlParameter[] p)
    {
        SqlConnection conn = new SqlConnection(connstr);
        conn.Open();
        SqlCommand comm = conn.CreateCommand();
        comm.CommandText = sqltext;
        foreach(SqlParameter ps in p)
        {
            comm.Parameters.Add(ps);
        }
        switch (returntype)
        { 
            case "dr":
                SqlDataReader dr = comm.ExecuteReader();
                return dr;
                break;
            case "dt":
                SqlDataAdapter da = new SqlDataAdapter();
                DataTable dt = new DataTable();
                da.Fill(dt);
                conn.Close();
                return dt;
                break;
            default:
                comm.ExecuteNonQuery();
                conn.Close();
                break;
        }
    }
}