• SqlHelper


    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Data;
    using System.Data.SqlClient;
    namespace Demo2017
    {
        public class SqlHelper
        {
            public static SqlDataReader ExecuteReader(string constr, string cmdstr, CommandType type, params SqlParameter[] ps)
            {
                SqlConnection conn = new SqlConnection(constr);
                conn.Open();
                SqlCommand cmd = new SqlCommand(cmdstr, conn);
                cmd.CommandType = type;
                if (ps.Length > 0)
                {
                    cmd.Parameters.AddRange(ps);
                }
                SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                return dr;
            }

            public static int ExecuteNonQuery(string constr, string cmdstr,CommandType type, params SqlParameter[] ps)
            {
                SqlConnection conn = new SqlConnection(constr);
                conn.Open();
                SqlCommand cmd = new SqlCommand(cmdstr, conn);
                cmd.CommandType = type;
                if (ps.Length > 0)
                {
                    cmd.Parameters.AddRange(ps);
                }
               int i= cmd.ExecuteNonQuery();
               return i;
            }

            public static DataSet ExecuteDataSet(string constr, string cmdstr,CommandType type, params SqlParameter[] ps)
            {
                SqlConnection conn = new SqlConnection(constr);
          
                SqlDataAdapter sda = new SqlDataAdapter(cmdstr, conn);      
                sda.SelectCommand.CommandType=type;
                if (ps.Length > 0)
                {
                    sda.SelectCommand.Parameters.AddRange(ps);
                }
                DataSet ds = new DataSet();
                sda.Fill(ds);              
                return ds;
            }

            public static object ExecuteScalar(string constr, string cmdstr,CommandType type, params SqlParameter[] ps)
            {
                SqlConnection conn = new SqlConnection(constr);
                conn.Open();
                SqlCommand cmd = new SqlCommand(cmdstr, conn);
                cmd.CommandType = type;
                if (ps.Length > 0)
                {
                    cmd.Parameters.AddRange(ps);
                }
                object o = cmd.ExecuteScalar();
                return o;
            }
        }
    }
  • 相关阅读:
    C#中使用OpenSSL的公钥加密/私钥解密
    .NET跨平台:在Linux Ubuntu上编译coreclr/corefx/dnx(20150617)
    ASP.NET Web API与Owin OAuth:调用与用户相关的Web API
    ASP.NET Web API与Owin OAuth:使用Access Toke调用受保护的API
    在ASP.NET中基于Owin OAuth使用Client Credentials Grant授权发放Token
    C# 中 async/await 调用传统 Begin/End 异步方法
    将GitLab的数据库导入阿里云PostgreSQL RDS
    在Mac/Linux/Windows上编译corefx遇到的问题及解决方法
    在Mac上用自己编译出的DNX运行.NET程序
    [DNX]解决dnu restore时找不到Newtonsoft.Json的问题
  • 原文地址:https://www.cnblogs.com/wantnewlive/p/9868996.html
Copyright © 2020-2023  润新知