SqlHelper类

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <connectionStrings>
    <add name="sqlServer" connectionString="Server =.;uid=sa;pwd=123;database=ihospitalhis;"/>
  </connectionStrings>
</configuration>

 

DataTable dt = sqlHelper.FillDt(sql,new sqlParameter("Tm_WaiId",type));

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Data;
using System.Data.sqlClient;
namespace WinForm
{
    class sqlHelper
    {
        static string ConString = ConfigurationManager.ConnectionStrings["sql2005"].ConnectionString;
        /// <summary>
        /// 增删改
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pars"></param>
        /// <returns></returns>
        public static int ExecuteNonQuery(string sql,params sqlParameter[] pars)
        {
           
            using(sqlConnection sqlCon = new sqlConnection(ConString) )
            {

                sqlCon.open();

                using(sqlCommand sqlCmd = sqlCon.CreateCommand())
                {
                    sqlCmd.CommandText = sql;
                    foreach (sqlParameter par in pars)
                    {
                        sqlCmd.Parameters.Add(par);
                    }
                    return sqlCmd.ExecuteNonQuery();
                }
            }
        }
        /// <summary>
        /// 查询，返回DataTable
        /// </summary>
        /// <param name="sql"></param>
        /// <param name="pars"></param>
        /// <returns></returns>
        public static DataTable FillDt(string sql,params sqlParameter[] pars)
        {
            using (sqlConnection sqlCon = new sqlConnection(ConString))