C#.NET中现在用的SqlHelper操作方法集合【收藏版】

http://www.cnblogs.com/nianyuwen/

  1 http://www.cnblogs.com/nianyuwen/

  2 

  3 using System;

  4 using System.Collections.Generic;

  5 using System.Linq;

  6 using System.Text;

  7 using System.Data;

  8 using System.Data.SqlClient;

  9 using System.Configuration;

 10 namespace MSBDAL

 11 {

 12     /*

 13      * Descrption：数据库常用操作方法合集

 14      * Author：nianyuwen

 15      * Time：2012-03-15

 16      * MSN:[email protected]

 17      * WebUrl:http://www.cnblogs.com/nianyuwen/

 18      */

 19    public  class SqlHelper

 20     {

 21        public SqlHelper()

 22        {

 23            //TODO:构造数据库常用操作方法集

 24        }

 25        private static SqlConnection connection;

 26        private static string connectionString;

 27        public static SqlConnection Connection

 28        {

 29            get

 30            {

 31                //string connectionString = ConfigurationManager.ConnectionStrings["stock"].ConnectionString;

 32                //"Data Source=.;Initial Catalog=StockBank;Persist Security Info=True;User ID=sa;pwd=123";

 33                connectionString = ConfigurationSettings.AppSettings["ConstrSQL"].ToString();

 34                

 35                if (connection == null)

 36                {

 37                    connection = new SqlConnection(connectionString);

 38                    connection.Open();

 39                }

 40                else if (connection.State == System.Data.ConnectionState.Closed)

 41                {

 42                    connection.Open();

 43                }

 44                else if (connection.State == System.Data.ConnectionState.Broken)

 45                {

 46                    connection.Close();

 47                    connection.Open();

 48                }

 49                return connection;

 50            }

 51        }

 52 

 53        public static int ExecuteCommand(string safeSql)

 54        {

 55            SqlCommand cmd = new SqlCommand(safeSql, Connection);

 56            int result = cmd.ExecuteNonQuery();

 57            return result;

 58        }

 59       /// <summary>

 60       /// 带参数的执行命令

 61       /// </summary>

 62       /// <param name="sql">SQL命令</param>

 63       /// <param name="values">返回VALUE值</param>

 64       /// <returns></returns>

 65        public static int ExecuteCommand(string sql, params SqlParameter[] values)

 66        {

 67            SqlCommand cmd = new SqlCommand(sql, Connection);

 68            cmd.Parameters.AddRange(values);

 69            return cmd.ExecuteNonQuery();

 70        }

 71        /// <summary>

 72        /// 返回影响记录数

 73        /// </summary>

 74        /// <param name="safeSql"></param>

 75        /// <returns></returns>

 76        public static int GetScalar(string safeSql)

 77        {

 78            SqlCommand cmd = new SqlCommand(safeSql, Connection);

 79            int result = Convert.ToInt32(cmd.ExecuteScalar());

 80            return result;

 81        }

 82 

 83        public static int GetScalar(string sql, params SqlParameter[] values)

 84        {

 85            SqlCommand cmd = new SqlCommand(sql, Connection);

 86            cmd.Parameters.AddRange(values);

 87            int result = Convert.ToInt32(cmd.ExecuteScalar());

 88            return result;

 89        }

 90 

 91        public static SqlDataReader GetReader(string safeSql)

 92        {

 93            SqlCommand cmd = new SqlCommand(safeSql, Connection);

 94            SqlDataReader reader = cmd.ExecuteReader();

 95            return reader;

 96        }

 97 

 98        public static SqlDataReader GetReader(string sql, params SqlParameter[] values)

 99        {

100            SqlCommand cmd = new SqlCommand(sql, Connection);

101            cmd.Parameters.AddRange(values);

102            SqlDataReader reader = cmd.ExecuteReader();

103            return reader;

104        }

105 

106        public static DataTable GetDataSet(string safeSql)

107        {

108            DataSet ds = new DataSet();

109            SqlCommand cmd = new SqlCommand(safeSql, Connection);

110            SqlDataAdapter da = new SqlDataAdapter(cmd);

111            da.Fill(ds);

112            return ds.Tables[0];

113        }

114 

115        public static DataTable GetDataSet(string sql, params SqlParameter[] values)

116        {

117            DataSet ds = new DataSet();

118            SqlCommand cmd = new SqlCommand(sql, Connection);

119            cmd.Parameters.AddRange(values);

120            SqlDataAdapter da = new SqlDataAdapter(cmd);

121            da.Fill(ds);

122            return ds.Tables[0];

123        }

124 

125        /// <summary>

126        /// 获得数据集

127        /// </summary>

128        public static DataSet GetDataSet(string sql, string table)

129        {

130            DataSet ds = new DataSet();

131            SqlCommand cmd = new SqlCommand(sql, Connection);

132            SqlDataAdapter da = new SqlDataAdapter(cmd);

133            da.Fill(ds, table);

134            return ds;

135        }

136 

137        public static DataSet GetDataSet(string sql, string table, params SqlParameter[] values)

138        {

139            DataSet ds = new DataSet();

140            SqlCommand cmd = new SqlCommand(sql, Connection);

141            cmd.Parameters.AddRange(values);

142            SqlDataAdapter da = new SqlDataAdapter(cmd);

143            da.Fill(ds, table);

144            return ds;

145        }

146     }

147 }