csharp/aryice/GOTO.Segment/GOTO.BigDataAccess/DBSql/Access/SqlServerHelper.cs

SqlServerHelper.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;

namespace GOTO.BigDataAccess.DBSql.Access
{
    /// 
    /// 数据访问基础类(基于SQLServer)
    /// 
    public clast SqlServerHelper:DBHelperFactory
    {
        public SqlServerHelper()
        {
        }
        #region 公用方法
        public override bool ConnectionIsUse(string connectionString)
        {
            bool revalue = false;
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                try
                {
                    connection.Open();
                    connection.Close();
                    revalue = true;
                }
                catch (System.Data.SqlClient.SqlException e)
                {
                    connection.Close();
                }
            }
            return revalue;
        }
        /// 
        /// 判断是否存在某表的某个字段
        /// 
        /// 表名称
        /// 列名称
        /// 是否存在
        public override bool ColumnExists(string connectionString, string tableName, string columnName)
        {
            string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'";
            object res = GetSingle(connectionString, sql);
            if (res == null)
            {
                return false;
            }
            return Convert.ToInt32(res) > 0;
        }
        public override int GetMaxID(string connectionString, string FieldName, string TableName)
        {
            string strsql = "select max(" + FieldName + ") from " + TableName;
            object obj = GetSingle(connectionString, strsql);
            if (obj == null)
            {
                return 1;
            }
            else
            {
                return int.Parse(obj.ToString());
            }
        }
        public override bool Exists(string connectionString, string strSql)
        {
            var obj = GetSingle(connectionString, strSql);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        /// 
        /// 表是否存在
        /// 
        /// 
        /// 
        public override bool TabExists(string connectionString, string TableName)
        {
            string strsql = "select count(*) from sysobjects where id = object_id(N'[" + TableName + "]') and OBJECTPROPERTY(id, N'IsUserTable') = 1";
            object obj = GetSingle(connectionString, strsql);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        public override bool Exists(string connectionString, string strSql, params SqlParameter[] cmdParms)
        {
            object obj = GetSingle(connectionString, strSql, cmdParms);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        #endregion
        #region  执行简单SQL语句
        /// 
        /// 执行SQL语句,返回影响的记录数
        /// 
        /// SQL语句
        /// 影响的记录数
        public override int ExecuteSql(string connectionString, string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        int rows = cmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException E)
                    {
                        connection.Close();
                        throw new Exception(E.Message);
                    }
                }
            }
        }
        /// 
        /// 执行多条SQL语句,实现数据库事务。
        /// 
        /// 多条SQL语句		
        public override void ExecuteSqlTran(string connectionString, ArrayList SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = conn;
                SqlTransaction tx = conn.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    for (int n = 0; n < SQLStringList.Count; n++)
                    {
                        string strsql = SQLStringList[n].ToString();
                        if (strsql.Trim().Length > 1)
                        {
                            cmd.CommandText = strsql;
                            cmd.ExecuteNonQuery();
                        }
                    }
                    tx.Commit();
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    tx.Rollback();
                    throw new Exception(E.Message);
                }
            }
        }
        /// 
        /// 执行多条SQL语句,实现数据库事务。
        /// 
        /// 多条SQL语句	
        /// SQL语句对应的参数	
        public override int ExecuteSqlTran(string connectionString, ArrayList SQLStringList, List ParamList)
        {
            int val = 0;
            using (var conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    var cmd = new SqlCommand();
                    try
                    {
                        for (int n = 0; n < SQLStringList.Count; n++)
                        {
                            string strsql = SQLStringList[n].ToString();
                            var cmdParam = ParamList[n];
                            PrepareCommand(cmd, conn, trans, strsql, cmdParam);
                            val += cmd.ExecuteNonQuery();
                            cmd.Parameters.Clear();
                        }
                        trans.Commit();
                    }
                    catch
                    {
                        trans.Rollback();
                        throw;
                    }
                }
            }
            return val;
        }
        /// 
        /// 执行带一个存储过程参数的的SQL语句。
        /// 
        /// SQL语句
        /// 参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加
        /// 影响的记录数
        public override int ExecuteSql(string connectionString, string SQLString, string content)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
                myParameter.Value = content;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    throw new Exception(E.Message);
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }
        /// 
        /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
        /// 
        /// SQL语句
        /// 图像字节,数据库的字段类型为image的情况
        /// 影响的记录数
        public override int ExecuteSqlInsertImg(string connectionString, string strSQL, byte[] fs)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(strSQL, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image);
                myParameter.Value = fs;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException E)
                {
                    throw new Exception(E.Message);
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }
        /// 
        /// 执行一条计算查询结果语句,返回查询结果(object)。
        /// 
        /// 计算查询结果语句
        /// 查询结果(object)
        public override object GetSingle(string connectionString, string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        object obj = cmd.ExecuteScalar();
                        connection.Close();
                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                        {
                            return null;
                        }
                        else
                        {
                            return obj;
                        }
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        connection.Close();
                    }
                }
            }
            return null;
        }
        /// 
        /// 执行查询语句,返回SqlDataReader
        /// 
        /// 查询语句
        /// SqlDataReader
        public override SqlDataReader ExecuteReader(string connectionString, string strSQL)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand(strSQL, connection);
            try
            {
                connection.Open();
                SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                return myReader;
            }
            catch (System.Data.SqlClient.SqlException e)
            {
                throw new Exception(e.Message);
            }
        }
        /// 
        /// 执行查询语句,返回DataSet
        /// 
        /// 查询语句
        /// DataSet
        public override DataSet Query(string connectionString, string strSQLString)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                var ds = new DataSet();
                try
                {
                    connection.Open();
                    var command = new SqlDataAdapter(strSQLString, connection);
                    command.Fill(ds, "ds");
                }
                catch (SqlException ex)
                {
                    throw new Exception(ex.Message);
                }
                return ds;
            }
        }
        /// 
        /// 执行查询语句,返回DataSet
        /// 
        /// 查询语句
        /// DataSet
        public override DataTable GetDataDable(string connectionString, string strSQLString)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                var ds = new DataTable();
                try
                {
                    connection.Open();
                    var command = new SqlDataAdapter(strSQLString, connection);
                    command.Fill(ds);
                }
                catch (SqlException ex)
                {
                    ;
                }
                return ds;
            }
        }
        #endregion
        #region 执行带参数的SQL语句
        /// 
        /// 执行SQL语句,返回影响的记录数
        /// 
        /// SQL语句
        /// 影响的记录数
        public override int ExecuteSql(string connectionString, string SQLString, params SqlParameter[] cmdParms)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                using (var cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        var rows = cmd.ExecuteNonQuery();
                        cmd.Parameters.Clear();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException E)
                    {
                        throw new Exception(E.Message);
                    }
                }
            }
        }
        /// 
        /// 执行多条SQL语句,实现数据库事务。
        /// 
        /// SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[])
        public override void ExecuteSqlTran(string connectionString, Hashtable SQLStringList)
        {
            using (var conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    var cmd = new SqlCommand();
                    try
                    {
                        foreach (DictionaryEntry myDE in SQLStringList)
                        {
                            string cmdText = myDE.Key.ToString();
                            var cmdParms = (SqlParameter[])myDE.Value;
                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
                            int val = cmd.ExecuteNonQuery();
                            cmd.Parameters.Clear();
                        }
                        trans.Commit();
                    }
                    catch
                    {
                        trans.Rollback();
                        throw;
                    }
                }
            }
        }
        /// 
        /// 执行多条SQL语句,实现数据库事务。
        /// 
        /// SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[])
        public override int ExecuteSqlTran1(string connectionString, Hashtable SQLStringList)
        {
            int val = 0;
            using (var conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    var cmd = new SqlCommand();
                    try
                    {
                        foreach (DictionaryEntry myDE in SQLStringList)
                        {
                            string cmdText = myDE.Key.ToString();
                            var cmdParms = (SqlParameter[])myDE.Value;
                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
                            val += cmd.ExecuteNonQuery();
                            cmd.Parameters.Clear();
                        }
                        trans.Commit();
                    }
                    catch
                    {
                        trans.Rollback();
                        throw;
                    }
                }
            }
            return val;
        }
        /// 
        /// 执行一条计算查询结果语句,返回查询结果(object)。
        /// 
        /// 计算查询结果语句
        /// 查询结果(object)
        public override object GetSingle(string connectionString, string SQLString, params SqlParameter[] cmdParms)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                using (var cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        object obj = cmd.ExecuteScalar();
                        cmd.Parameters.Clear();
                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                        {
                            return null;
                        }
                        else
                        {
                            return obj;
                        }
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        throw new Exception(e.Message);
                    }
                }
            }
        }
        /// 
        /// 执行查询语句,返回SqlDataReader
        /// 
        /// 查询语句
        /// SqlDataReader
        public override SqlDataReader ExecuteReader(string connectionString, string SQLString, params SqlParameter[] cmdParms)
        {
            var connection = new SqlConnection(connectionString);
            var cmd = new SqlCommand();
            try
            {
                PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                cmd.Parameters.Clear();
                return myReader;
            }
            catch (System.Data.SqlClient.SqlException e)
            {
                throw new Exception(e.Message);
            }
        }
        /// 
        /// 执行查询语句,返回DataSet
        /// 
        /// 查询语句
        /// DataSet
        public override DataSet Query(string connectionString, string SQLString, params SqlParameter[] cmdParms)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                var cmd = new SqlCommand();
                PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                {
                    DataSet ds = new DataSet();
                    try
                    {
                        da.Fill(ds, "ds");
                        cmd.Parameters.Clear();
                    }
                    catch (System.Data.SqlClient.SqlException ex)
                    {
                        throw new Exception(ex.Message);
                    }
                    return ds;
                }
            }
        }
        private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
        {
            if (conn.State != ConnectionState.Open)
                conn.Open();
            cmd.Connection = conn;
            cmd.CommandText = cmdText;
            if (trans != null)
                cmd.Transaction = trans;
            cmd.CommandType = CommandType.Text;
            if (cmdParms != null)
            {
                foreach (SqlParameter parm in cmdParms)
                    cmd.Parameters.Add(parm);
            }
        }

        #endregion
        #region 数据大批量的插入数据库中
        /// 
        /// 将Datatable中的数据大批量的插入数据库中
        /// 
        /// 
        public override void WriteBlockDataToDB(string connectionString, DataTable dt)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                try
                {
                    connection.Open();
                    using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString))
                    {
                        bulkCopy.DestinationTableName = dt.TableName;
                        foreach (DataColumn col in dt.Columns)
                        {
                            bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);
                        }
                        bulkCopy.WriteToServer(dt);
                        bulkCopy.Close();
                    }
                }
                catch (Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    connection.Close();
                }
            }
        }
        #endregion
        #region 存储过程操作
        /// 
        /// 执行存储过程
        /// 
        /// 存储过程名
        /// 存储过程参数
        /// SqlDataReader
        public override SqlDataReader RunProcedure(string connectionString, string storedProcName, IDataParameter[] parameters)
        {
            var connection = new SqlConnection(connectionString);
            SqlDataReader returnReader;
            connection.Open();
            var command = BuildQueryCommand(connection, storedProcName, parameters);
            command.CommandType = CommandType.StoredProcedure;
            returnReader = command.ExecuteReader();
            return returnReader;
        }
        /// 
        /// 执行存储过程
        /// 
        /// 存储过程名
        /// 存储过程参数
        /// DataSet结果中的表名
        /// DataSet
        public override DataSet RunProcedure(string connectionString, string storedProcName, IDataParameter[] parameters, string tableName)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                var dataSet = new DataSet();
                connection.Open();
                var sqlDA = new SqlDataAdapter();
                sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
                sqlDA.Fill(dataSet, tableName);
                connection.Close();
                return dataSet;
            }
        }
        /// 
        /// 构建 SqlCommand 对象(用来返回一个结果集,而不是一个整数值)
        /// 
        /// 数据库连接
        /// 存储过程名
        /// 存储过程参数
        /// SqlCommand
        private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        {
            var command = new SqlCommand(storedProcName, connection);
            command.CommandType = CommandType.StoredProcedure;
            foreach (var parameter in parameters)
            {
                command.Parameters.Add(parameter);
            }
            return command;
        }
        /// 
        /// 执行存储过程,返回影响的行数		
        /// 
        /// 存储过程名
        /// 存储过程参数
        /// 影响的行数
        /// 
        public override int RunProcedure(string connectionString, string storedProcName, IDataParameter[] parameters, out int rowsAffected)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                int result;
                connection.Open();
                var command = BuildIntCommand(connection, storedProcName, parameters);
                rowsAffected = command.ExecuteNonQuery();
                result = (int)command.Parameters["ReturnValue"].Value;
                return result;
            }
        }
        /// 
        /// 执行存储过程,返回第一行第一列		
        /// 
        /// 存储过程名
        /// 存储过程参数
        /// 第一行第一列值
        /// 
        public override string RunProcedure(string connectionString, string storedProcName, IDataParameter[] parameters, out string rowsAffected)
        {
            using (var connection = new SqlConnection(connectionString))
            {
                string result;
                connection.Open();
                var command = BuildIntCommand(connection, storedProcName, parameters);
                command.ExecuteNonQuery();
                result = command.Parameters["ReturnValue"].Value.ToString();
                rowsAffected = result;
                return result;
            }
        }
        /// 
        /// 创建 SqlCommand 对象实例(用来返回一个整数值)	
        /// 
        /// 存储过程名
        /// 存储过程参数
        /// SqlCommand 对象实例
        private SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        {
            var command = BuildQueryCommand(connection, storedProcName, parameters);
            command.Parameters.Add(new SqlParameter("ReturnValue",
                SqlDbType.Int, 4, ParameterDirection.ReturnValue,
                false, 0, 0, string.Empty, DataRowVersion.Default, null));
            return command;
        }
        #endregion
        #region 执行SQL语句,实现数据库事务
        /// 
        /// 执行多条SQL语句,实现数据库事务。
        /// 
        /// 多条SQL语句		
        public override int ExecuteSqlTran(string connectionString, List SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = conn;
                SqlTransaction tx = conn.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    int count = 0;
                    for (int n = 0; n < SQLStringList.Count; n++)
                    {
                        string strsql = SQLStringList[n];
                        if (strsql.Trim().Length > 1)
                        {
                            cmd.CommandText = strsql;
                            count += cmd.ExecuteNonQuery();
                        }
                    }
                    tx.Commit();
                    return count;
                }
                catch
                {
                    tx.Rollback();
                    return 0;
                }
            }
        }
        /// 
        /// 执行1条SQL语句,实现数据库事务。
        /// 
        /// 多条SQL语句		
        public override int ExecuteSqlTran(string connectionString, string SQLString)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = conn;
                SqlTransaction tx = conn.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    int count = 0;
                    string strsql = SQLString;
                    if (strsql.Trim().Length > 1)
                    {
                        cmd.CommandText = strsql;
                        count += cmd.ExecuteNonQuery();
                    }
                    tx.Commit();
                    return count;
                }
                catch
                {
                    tx.Rollback();
                    return 0;
                }
            }
        }
        #endregion
    }
}