C#_数据库交互_SqlHelper

using System;

using System.Collections.Generic;

using System.Text;

using System.Data.SqlClient;

using System.Configuration;

using System.Data;



namespace 收费系统

{

    class SQLhelper

    {

        public static int ExecuteNonQuery(string sql, params SqlParameter[] parameters)

        {

            string Constrs = ConfigurationManager.ConnectionStrings["Connstrs"].ConnectionString;

            using (SqlConnection conn = new SqlConnection(Constrs))

            {

                conn.Open();

                using (SqlCommand cmd = conn.CreateCommand())

                {

                    cmd.CommandText = sql;

                    foreach (SqlParameter parameter in parameters)

                    {



                        cmd.Parameters.Add(parameter);

                    }

                    return cmd.ExecuteNonQuery();





                }



            }

        }





        public static DataTable ExecuteDataTable(string sql, params SqlParameter[] parameters)

        {

            string Constrs = ConfigurationManager.ConnectionStrings["Connstrs"].ConnectionString;

            using (SqlConnection conn = new SqlConnection(Constrs))

            {

                conn.Open();

                using (SqlCommand cmd = conn.CreateCommand())

                {

                    cmd.CommandText = sql;

                    foreach (SqlParameter parameter in parameters)

                    {



                        cmd.Parameters.Add(parameter);

                    }

                    DataSet dataset = new DataSet();

                    SqlDataAdapter adapter = new SqlDataAdapter(cmd);

                    adapter.Fill(dataset);

                    return dataset.Tables[0];

                }



            }

        }

    }

}