数据库层封装

using  System;
using  System.Configuration;
using  System.Data;
using  System.Data.SqlClient;
using  System.Collections;
using  System.Reflection;


namespace  ThreeLayer.DAL 
... {
    public abstract class Data 
    ...{
        
        // ＝＝＝数据库连接串设置＝＝＝
        //public static readonly string conn_Default = ConfigurationSettings.AppSettings["LocalSqlServer"]; // 系统默认数据库连接串
        public static readonly string conn_Default = ConfigurationManager.ConnectionStrings["Personal"].ConnectionString;

        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝==  
        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝数据库底层操作＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝==  
        /**//// 

        /// 执行ExecuteNonQuery
        /// 

        /// 数据库连接
        /// Sql语句类型
        /// Sql语句
        /// Parm数组
        /// 返回影响行数
        public static int ExecuteNonQuery(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms) 
        ...{
            SqlCommand cmd = new SqlCommand();
            using (SqlConnection conn = new SqlConnection(connString)) 
            ...{
                conn.Open();
                cmd.Connection=conn;
                cmd.CommandText = cmdText;
                if (cmdParms != null) 
                ...{
                    foreach (SqlParameter parm in cmdParms)
                        cmd.Parameters.Add(parm);
                }
                int val = cmd.ExecuteNonQuery();
                cmd.Parameters.Clear();
                conn.Close();
                return val;
            }
        }
        /**//// 

        /// 返回一个SqlParameter实例
        /// 

        /// 字段名
        /// 字段类型
        /// 范围
        /// 赋值
        /// 返回一个SqlParameter实例
        public static SqlParameter MakeParam(string ParamName,System.Data.SqlDbType stype,int size,Object Value) 
        ...{
            SqlParameter para=new SqlParameter(ParamName,Value);
            para.SqlDbType=stype;
            para.Size=size;
            return para;
        }
        /**//// 

        /// 获得SqlParameter实例
        /// 

        /// 字段名
        /// 赋值
        /// 返回一个SqlParameter实例
        public static SqlParameter MakeParam(string ParamName,string Value) 
        ...{
            return new SqlParameter(ParamName, Value);
        }
        /**//// 

        /// 获得DateSet实例(获得单页记录)
        /// 

        /// 一页显示的记录数
        /// 当前页码
        /// 数据库连接串
        /// Sql语句类型
        /// Sql语句
        /// Parm数组
        /// 
        public static DataSet ExecuteDataSet(int int_PageSize,int int_CurrentPageIndex,string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms) 
        ...{
            SqlConnection conn = new SqlConnection(connString);
            try 
            ...{
                conn.Open();
                System.Data.SqlClient.SqlDataAdapter da=new SqlDataAdapter(cmdText,conn);
                da.SelectCommand.CommandType=cmdType;
                if (cmdParms != null) 
                ...{
                    foreach (SqlParameter parm in cmdParms)
                        da.SelectCommand.Parameters.Add(parm);
                }
                conn.Close();

                DataSet ds=new DataSet();
                if (int_PageSize==0 && int_CurrentPageIndex==0)
                ...{
                    da.Fill(ds,"12news1234567890");
                }
                else
                ...{
                    int int_Page=int_PageSize*(int_CurrentPageIndex-1);
                    if (int_Page<0)
                    ...{
                        int_Page=0;
                    }
                    da.Fill(ds,int_Page,int_PageSize,"12news1234567890");
                }
                return ds;
            }
            catch 
            ...{
                conn.Close();
                throw;
            }
        }
        /**//// 

        /// 获得DateSet实例(获得全部记录)
        /// 

        /// 数据库连接串
        /// Sql语句类型
        /// Sql语句
        /// Parm数组
        /// 
        public static DataSet ExecuteDataSet(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms) 
        ...{
            SqlConnection conn = new SqlConnection(connString);
            try 
            ...{
                conn.Open();
                System.Data.SqlClient.SqlDataAdapter da=new SqlDataAdapter(cmdText,conn);
                da.SelectCommand.CommandType=cmdType;
                if (cmdParms != null) 
                ...{
                    foreach (SqlParameter parm in cmdParms)
                        da.SelectCommand.Parameters.Add(parm);
                }
                conn.Close();

                DataSet ds=new DataSet();
                da.Fill(ds,"12news1234567890");

                return ds;
            }
            catch 
            ...{
                conn.Close();
                throw;
            }
        }
        
        /**//// 

        /// 执行ExecuteScalar
        /// 

        /// 数据库连接串
        /// Sql语句类型
        /// Sql语句
        /// Parm数组
        /// 返回第一行第一列记录值
        public static object ExecuteScalar(string connString, CommandType cmdType, string cmdText, params SqlParameter[] cmdParms) 
        ...{
            SqlCommand cmd = new SqlCommand();

            using (SqlConnection conn = new SqlConnection(connString)) 
            ...{
                conn.Open();
                cmd.Connection = conn;
                cmd.CommandText = cmdText;
                if (cmdParms != null) 
                ...{
                    foreach (SqlParameter parm in cmdParms)
                        cmd.Parameters.Add(parm);
                }
                object val = cmd.ExecuteScalar();
                cmd.Parameters.Clear();
                conn.Close();
                return val;
            }
        }
    


        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝==  
        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝数据库操作：插入，修改，列表显示，以及获得详细记录＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝==  

        /**//// 

        /// 执行Sql语句
        /// 

        /// 数据库连接
        /// sql语句(比如：insert into tablename set name='北京'')
        public static void RunSql(string connString,string str_Sql)
        ...{
            Data.ExecuteNonQuery(connString,CommandType.Text,str_Sql);
        }
        /**//// 

        /// 插入记录
        /// 

        /// 数据库连接
        /// sql语句类型
        /// sql语句
        /// 表示层传递过来的哈希表对象
        public static void Insert(string connString,string TableName,Hashtable ht)
        ...{
            SqlParameter[] Parms=new SqlParameter[ht.Count];
            IDictionaryEnumerator et = ht.GetEnumerator();
            int i=0;
            // 作哈希表循环
            while ( et.MoveNext() )
            ...{
                System.Data.SqlClient.SqlParameter sp=Data.MakeParam("@"+et.Key.ToString(),et.Value.ToString());
                Parms[i]=sp; // 添加SqlParameter对象
                i=i+1;
            }
            string str_Sql=GetInsertSqlbyHt(TableName,ht); // 获得插入sql语句
            Data.ExecuteNonQuery(connString,CommandType.Text,str_Sql,Parms);
        }
        /**//// 

        /// 删除记录
        /// 

        /// 数据库连接
        /// sql语句类型
        /// sql语句
        /// 表示层传递过来的哈希表对象
        public static void Del(string connString,string TableName,string ht_Where,Hashtable ht)
        ...{
            SqlParameter[] Parms=new SqlParameter[ht.Count];
            IDictionaryEnumerator et = ht.GetEnumerator();
            int i=0;
            // 作哈希表循环
            while ( et.MoveNext() )
            ...{
                System.Data.SqlClient.SqlParameter sp=Data.MakeParam("@"+et.Key.ToString(),et.Value.ToString());
                Parms[i]=sp; // 添加SqlParameter对象
                i=i+1;
            }
            string str_Sql=GetDelSqlbyHt(TableName,ht_Where,ht); // 获得删除sql语句
            Data.ExecuteNonQuery(connString,CommandType.Text,str_Sql,Parms);
        }

        /**//// 

        /// 修改记录
        /// 

        /// 数据库连接
        /// 数据库表名
        /// 传递条件,比如Id=@Id
        /// 表示层传递过来的哈希表对象
        public static void Update(string connString,string TableName,string ht_Where, Hashtable ht)
        ...{
            SqlParameter[] Parms=new SqlParameter[ht.Count];
            IDictionaryEnumerator et = ht.GetEnumerator();
            int i=0;
            // 作哈希表循环
            while ( et.MoveNext() )
            ...{
                System.Data.SqlClient.SqlParameter sp=Data.MakeParam("@"+et.Key.ToString(),et.Value.ToString());
                Parms[i]=sp; // 添加SqlParameter对象
                i=i+1;
            }
            string str_Sql=GetUpdateSqlbyHt(TableName,ht_Where,ht); // 获得插入sql语句
            Data.ExecuteNonQuery(connString,CommandType.Text,str_Sql,Parms);
        }
        /**//// 

        /// 获得数字字段最大值(注：当该表记录为空,返回0)
        /// 

        /// 数据库连接
        /// Key值字段名
        /// 数据库名
        /// 返回数字字段最大值
        public static int GetMaxId(string connString,string id,string table_name)
        ...{
            string str_Sql="Select Max("+id+") from "+table_name;
            int int_MaxId=0;
            object obj=Data.ExecuteScalar(connString,CommandType.Text,str_Sql,null);
            if (obj==System.DBNull.Value)
            ...{
                int_MaxId=0;
            }
            else
            ...{
                int_MaxId = Convert.ToInt32(obj);
            }
            
            return int_MaxId;
        }

        /**//// 

        /// 通过传递条件获得记录条数
        /// 

        /// 表示层传递过来的条件字段参数
        /// 返回记录条数
        public static int GetRsCount(string connString,string Table,string ht_Where,Hashtable ht)
        ...{
            if (ht==null)
            ...{
                string str_Sql=GetPageListCountSqlbyHt(Table,ht_Where,null);
                return (int)ExecuteScalar(connString,CommandType.Text,str_Sql,null);
            }
            else
            ...{
                string str_Sql=GetPageListCountSqlbyHt(Table,ht_Where,ht);
                SqlParameter[] Parms=new SqlParameter[ht.Count];
                IDictionaryEnumerator et = ht.GetEnumerator();
                int i=0;
                // 作哈希表循环
                while ( et.MoveNext() )
                ...{
                    System.Data.SqlClient.SqlParameter sp=Data.MakeParam("@"+et.Key.ToString(),et.Value.ToString());
                    Parms[i]=sp; // 添加SqlParameter对象
                    i=i+1;
                }
                return (int)ExecuteScalar(connString,CommandType.Text,str_Sql,Parms);
            }
        }
        /**//// 

        /// 通过传递条件获得记录条数
        /// 

        /// 数据库连接
        /// Sql语句
        /// 返回记录条数
        public static int GetRsCount(string connString,string str_Sql)
        ...{
            return (int)ExecuteScalar(connString,CommandType.Text,str_Sql,null);
        }
        /**//// 

        /// 获得单个字段值
        /// 

        /// 数据库连接
        /// Sql语句，比如Select Name from Table where id=2
        /// 
        public static string GetFiledValue(string connString,string str_Sql)
        ...{
            return ExecuteScalar(connString,CommandType.Text,str_Sql,null).ToString();
        }

        /**//// 

        /// 通过运行Sql语句获得IList数据源
        /// 

        /// 数据库连接
        /// 一页显示记录数
        /// 当前页码
        /// Sql语句
        /// 实体类名
        /// 
        public static IList RunSql(string conn_Default,int int_PageSize,int int_CurrentPageIndex,string str_Sql,string class_Name)
        ...{
            // ＝＝＝获得数据库源，返回IList为数据源＝＝＝
            IList Ilst=new ArrayList();
            // 当没有传递条件参数时作的操作
            using (DataSet ds = ExecuteDataSet(int_PageSize,int_CurrentPageIndex,conn_Default, CommandType.Text, str_Sql, null))
            ...{
                DataTable dt=ds.Tables[0];
                for (int j=0;j<dt.Rows.Count;j++)
                ...{
                    
                    Type myType =Type.GetType(class_Name);// 获得“类”类型
                    Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
                    // 获得类的所有属性数组
                    PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
                    // 循环属性数组，并给数组属性赋值
                    for(int k=0;k<myPropertyInfo1.Length;k++)
                    ...{
                        PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                        Object filed_Val=dt.Rows[j][myPropInfo.Name];
                        switch (myPropInfo.PropertyType.ToString())
                        ...{
                            case "System.Int32":
                                myPropInfo.SetValue(o_Instance,(int)filed_Val,null);
                                break;
                            case "System.String":
                                myPropInfo.SetValue(o_Instance,filed_Val.ToString(),null);
                                break;
                            case "System.DateTime":
                                myPropInfo.SetValue(o_Instance,Convert.ToDateTime(filed_Val.ToString()),null);
                                break;
                        }
            
                    }
                    // 把一行类记录赋值给ILst对象
                    Ilst.Add(o_Instance);
                    
                }
            }
            return Ilst;
        }

        public static IList RunSql(string conn_Default,int int_PageSize,int int_CurrentPageIndex,string procName,SqlParameter[] prams,string class_Name)
        ...{
            // ＝＝＝获得数据库源，返回IList为数据源＝＝＝
            IList Ilst=new ArrayList();
            // 当没有传递条件参数时作的操作
            using (DataSet ds = ExecuteDataSet(int_PageSize,int_CurrentPageIndex,conn_Default, CommandType.StoredProcedure, procName,prams))
            ...{
                DataTable dt=ds.Tables[0];
                for (int j=0;j<dt.Rows.Count;j++)
                ...{
                    
                    Type myType =Type.GetType(class_Name);// 获得“类”类型
                    Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
                    // 获得类的所有属性数组
                    PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
                    // 循环属性数组，并给数组属性赋值
                    for(int k=0;k<myPropertyInfo1.Length;k++)
                    ...{
                        PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                        Object filed_Val=dt.Rows[j][myPropInfo.Name];
                        switch (myPropInfo.PropertyType.ToString())
                        ...{
                            case "System.Int32":
                                myPropInfo.SetValue(o_Instance,(int)filed_Val,null);
                                break;
                            case "System.String":
                                myPropInfo.SetValue(o_Instance,filed_Val.ToString(),null);
                                break;
                            case "System.DateTime":
                                myPropInfo.SetValue(o_Instance,Convert.ToDateTime(filed_Val.ToString()),null);
                                break;
                        }
            
                    }
                    // 把一行类记录赋值给ILst对象
                    Ilst.Add(o_Instance);
                    
                }
            }
            return Ilst;
        }

        /**//// 

        /// 通过页大小，当前页数返回IList数据源
        /// 

        /// 一页记录数
        /// 当前页数
        /// SQl语句
        /// 传递条件哈希表
        /// 实体类名
        /// 表示层传递过来的条件字段参数
        public static IList GetPageList(string conn_Default,int int_PageSize,int int_CurrentPageIndex,string Table,string ht_Where,string orderby,Hashtable ht,string class_Name)
        ...{
            // ＝＝＝获得数据库源，返回IList为数据源＝＝＝
            IList Ilst=new ArrayList();

            if (ht==null)
            ...{
                // 当没有传递条件参数时作的操作
                string str_Sql=GetPageListSqlbyHt(Table,ht_Where,orderby,null,class_Name);
                using (DataSet ds = ExecuteDataSet(int_PageSize,int_CurrentPageIndex,conn_Default, CommandType.Text, str_Sql, null))
                ...{
                    DataTable dt=ds.Tables[0];
                    for (int j=0;j<dt.Rows.Count;j++)
                    ...{
                        
                        Type myType =Type.GetType(class_Name);// 获得“类”类型
                        Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
                        // 获得类的所有属性数组
                        PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
                        // 循环属性数组，并给数组属性赋值
                        for(int k=0;k<myPropertyInfo1.Length;k++)
                        ...{
                            PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                            
                            Object filed_Val=dt.Rows[j][myPropInfo.Name];
                            switch (myPropInfo.PropertyType.ToString())
                            ...{
                                case "System.Int32":
                                    myPropInfo.SetValue(o_Instance,(int)filed_Val,null);
                                    break;
                                case "System.String":
                                    myPropInfo.SetValue(o_Instance,filed_Val.ToString(),null);
                                    break;
                                case "System.DateTime":
                                    myPropInfo.SetValue(o_Instance,Convert.ToDateTime(filed_Val.ToString()),null);
                                    break;
                            }
                
                        }
                        // 把一行类记录赋值给ILst对象
                        Ilst.Add(o_Instance);
                    }
                }
            }
            else // 当没有传递条件参数时作的操作
            ...{

                // 处理传递过来的参数
                SqlParameter[] Parms=new SqlParameter[ht.Count];
                IDictionaryEnumerator et = ht.GetEnumerator();
                int i=0;
                while ( et.MoveNext() )
                ...{
                    System.Data.SqlClient.SqlParameter sp=MakeParam("@"+et.Key.ToString(),et.Value.ToString());
                    Parms[i]=sp;
                    i=i+1;
                }
                string str_Sql=GetPageListSqlbyHt(Table,ht_Where,orderby,ht,class_Name);
                // 返回ILst
                using (DataSet ds = ExecuteDataSet(int_PageSize,int_CurrentPageIndex,conn_Default, CommandType.Text, str_Sql, Parms))
                ...{
                    DataTable dt=ds.Tables[0];
                    for (int j=0;j<dt.Rows.Count;j++)
                    ...{
                        
                        Type myType =Type.GetType(class_Name);// 获得“类”类型
                        Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
                        // 获得类的所有属性数组
                        PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
                        // 循环属性数组，并给数组属性赋值
                        for(int k=0;k<myPropertyInfo1.Length;k++)
                        ...{
                            PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                            Object filed_Val=dt.Rows[j][myPropInfo.Name];
                            switch (myPropInfo.PropertyType.ToString())
                            ...{
                                case "System.Int32":
                                    myPropInfo.SetValue(o_Instance,(int)filed_Val,null);
                                    break;
                                case "System.String":
                                    myPropInfo.SetValue(o_Instance,filed_Val.ToString(),null);
                                    break;
                                case "System.DateTime":
                                    myPropInfo.SetValue(o_Instance,Convert.ToDateTime(filed_Val.ToString()),null);
                                    break;
                            }
                
                        }
                        // 把一行类记录赋值给ILst对象




                        Ilst.Add(o_Instance);
                        
                    }
                }

            }
            return Ilst;
        }

        
        /**//// 

        /// ＝＝＝通过页大小，当前页数返回IList数据源＝＝＝
        /// 

        /// 一页记录数
        /// 当前页数
        /// SQl语句
        /// 传递条件哈希表
        /// 实体类名
        /// 表示层传递过来的条件字段参数
        public static Object GetDetail(string conn_Default,string Table,string ht_Where,Hashtable ht,string class_Name)
        ...{
            // ＝＝＝获得数据库源，返回IList为数据源＝＝＝
            IList Ilst=new ArrayList();

            if (ht==null)
            ...{
                string str_Sql=GetPageListSqlbyHt(Table,ht_Where,null,null,class_Name);
                // 当没有传递条件参数时作的操作
                using (DataSet ds = ExecuteDataSet(conn_Default, CommandType.Text, str_Sql, null))
                ...{
                    DataTable dt=ds.Tables[0];
                    for (int j=0;j<dt.Rows.Count;j++)
                    ...{
                        
                        Type myType =Type.GetType(class_Name);// 获得“类”类型
                        Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
                        // 获得类的所有属性数组
                        PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
                        // 循环属性数组，并给数组属性赋值
                        for(int k=0;k<myPropertyInfo1.Length;k++)
                        ...{
                            PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                            Object filed_Val=dt.Rows[j][myPropInfo.Name];
                            switch (myPropInfo.PropertyType.ToString())
                            ...{
                                case "System.Int32":
                                    myPropInfo.SetValue(o_Instance,(int)filed_Val,null);
                                    break;
                                case "System.String":
                                    myPropInfo.SetValue(o_Instance,filed_Val.ToString(),null);
                                    break;
                                case "System.DateTime":
                                    myPropInfo.SetValue(o_Instance,Convert.ToDateTime(filed_Val.ToString()),null);
                                    break;
                            }
                
                        }
                        // 把一行类记录赋值给ILst对象
                        return o_Instance;
                    }
                }
            }
            else // 当没有传递条件参数时作的操作
            ...{

                // 处理传递过来的参数
                SqlParameter[] Parms=new SqlParameter[ht.Count];
                IDictionaryEnumerator et = ht.GetEnumerator();
                int i=0;
                while ( et.MoveNext() )
                ...{
                    System.Data.SqlClient.SqlParameter sp=MakeParam("@"+et.Key.ToString(),et.Value.ToString());
                    Parms[i]=sp;
                    i=i+1;
                }
                
                string str_Sql=GetPageListSqlbyHt(Table,ht_Where,null,ht,class_Name);
                // 返回ILst
                using (DataSet ds = ExecuteDataSet(conn_Default, CommandType.Text, str_Sql, Parms))
                ...{
                    DataTable dt=ds.Tables[0];
                    for (int j=0;j<dt.Rows.Count;j++)
                    ...{
                        
                        Type myType =Type.GetType(class_Name);// 获得“类”类型
                        Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
                        // 获得类的所有属性数组
                        PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
                        // 循环属性数组，并给数组属性赋值
                        for(int k=0;k<myPropertyInfo1.Length;k++)
                        ...{
                            PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                            Object filed_Val=dt.Rows[j][myPropInfo.Name];
                            switch (myPropInfo.PropertyType.ToString())
                            ...{
                                case "System.Int32":
                                    myPropInfo.SetValue(o_Instance,(int)filed_Val,null);
                                    break;
                                case "System.String":
                                    myPropInfo.SetValue(o_Instance,filed_Val.ToString(),null);
                                    break;
                                case "System.DateTime":
                                    myPropInfo.SetValue(o_Instance,Convert.ToDateTime(filed_Val.ToString()),null);
                                    break;
                            }
                
                        }
                        // 把一行类记录赋值给ILst对象
                        return o_Instance;
                        
                    }
                }

            }
            return Ilst;
        }



        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝==  
        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝内部调用函数＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
        //　＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝==  
        /**//// 

        /// 获得删除Sql语句
        /// 

        /// 数据库表名
        /// 传递条件,比如Id=@Id
        /// 表示层传递过来的哈希表对象
        /// 返回删除sql语句
        public static string GetDelSqlbyHt(string Table,string ht_Where,Hashtable ht)
        ...{
            string str_Sql="";
            int i=0;
            
            int ht_Count=ht.Count; // 哈希表个数
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            while ( myEnumerator.MoveNext() )
            ...{
                if (i==0)
                ...{
                    if (ht_Where.ToString().ToLower().IndexOf((myEnumerator.Key+"=@"+myEnumerator.Key).ToLower())==-1)
                    ...{
                        str_Sql=myEnumerator.Key+"=@"+myEnumerator.Key;
                    }
                }
                else
                ...{
                    if (ht_Where.ToString().ToLower().IndexOf(("@"+myEnumerator.Key+" ").ToLower())==-1)
                    ...{
                        str_Sql=str_Sql+","+myEnumerator.Key+"=@"+myEnumerator.Key;
                    }
                    
                }
                i=i+1;
            }
            if (ht_Where==null || ht_Where.Replace(" ","")=="")  // 更新时候没有条件
            ...{
                str_Sql="Delete "+Table;
            }
            else
            ...{
                str_Sql="Delete "+Table+" where "+ht_Where;
            }
            return str_Sql;
        }

        /**//// 

        /// 获得插入Sql语句
        /// 

        /// 数据库表名
        /// 表示层传递过来的哈希表对象
        /// 返回插入Sql语句
        public static string GetInsertSqlbyHt(string TableName, Hashtable ht)
        ...{
            string str_Sql="";
            int i=0;
            
            int ht_Count=ht.Count; // 哈希表个数
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            string before="";
            string behide="";
            while ( myEnumerator.MoveNext() )
            ...{
                if (i==0)
                ...{
                    before="("+myEnumerator.Key;
                }
                else if (i+1==ht_Count)
                ...{
                    before=before+","+myEnumerator.Key+")";
                }
                else
                ...{
                    before=before+","+myEnumerator.Key;
                }
                i=i+1;
            }
            behide=" Values"+before.Replace(",",",@").Replace("(","(@");
            str_Sql="Insert into "+TableName+before+behide;
            return str_Sql;

        }

        /**//// 

        /// 获得记录数sql语句
        /// 

        /// 数据库表
        /// 条件
        /// 表示层传递过来的哈希表对象
        /// 
        public static string GetPageListCountSqlbyHt(string Table,string ht_Where,Hashtable ht)
        ...{
            string str_Sql="";
            if (ht_Where=="" || ht_Where==null)
            ...{
                string str_Ht="";
                if (ht!=null) // 用ht做条件
                ...{
                    
                    IDictionaryEnumerator et = ht.GetEnumerator();
                    int k=0;
                    while ( et.MoveNext() )
                    ...{
                        if (k==0)
                        ...{
                            str_Ht=" "+et.Key.ToString()+"=@"+et.Key.ToString();
                        }
                        else
                        ...{
                            str_Ht=str_Ht+" and "+et.Key.ToString()+"=@"+et.Key.ToString();
                        }
                        k=k+1;
                    }
                }
                if (str_Ht!="")
                ...{
                    str_Sql="Select Count(*) From "+Table+" where "+str_Ht;
                }
                else
                ...{
                    str_Sql="Select Count(*) From "+Table;
                }
            }
            else
            ...{
                str_Sql="Select Count(*) From "+Table+" where "+ht_Where; 
            }

            return str_Sql;

        }


        /**//// 

        /// 通过传递哈希表参数，获得更新Sql语句
        /// 

        /// 数据库表名
        /// 传递条件,比如Id=@Id
        /// 表示层传递过来的哈希表对象
        /// 
        public static string GetUpdateSqlbyHt(string Table,string ht_Where,Hashtable ht)
        ...{
            string str_Sql="";
            int i=0;
            
            int ht_Count=ht.Count; // 哈希表个数
            IDictionaryEnumerator myEnumerator = ht.GetEnumerator();
            while ( myEnumerator.MoveNext() )
            ...{
                if (i==0)
                ...{
                    if (ht_Where.ToString().ToLower().IndexOf((myEnumerator.Key+"=@"+myEnumerator.Key).ToLower())==-1)
                    ...{
                        str_Sql=myEnumerator.Key+"=@"+myEnumerator.Key;
                    }
                }
                else
                ...{
                    if (ht_Where.ToString().ToLower().IndexOf(("@"+myEnumerator.Key+" ").ToLower())==-1)
                    ...{
                        str_Sql=str_Sql+","+myEnumerator.Key+"=@"+myEnumerator.Key;
                    }
                    
                }
                i=i+1;
            }
            if (ht_Where==null || ht_Where.Replace(" ","")=="")  // 更新时候没有条件
            ...{
                str_Sql="update "+Table+" set "+str_Sql;
            }
            else
            ...{
                str_Sql="update "+Table+" set "+str_Sql+" where "+ht_Where;
            }
            str_Sql=str_Sql.Replace("set ,","set ").Replace("update ,","update ");
            return str_Sql;
        }
        /**//// 

        /// 获得IList分页Sql语句
        /// 

        /// 数据库表
        /// 条件
        /// 排序
        /// 表示层传递过来的条件字段参数
        /// 实体类名
        /// 
        public static string GetPageListSqlbyHt(string Table,string ht_Where,string orderby,Hashtable ht,String class_Name)
        ...{
            string str_Sql="";
            
            // 选择类型只能实现 Select * from table where a=@a and b=@b效果
            // where 后面优先权，当ht_Where不为空或者不为null，条件应该是ht_Where参数，否则，用ht做循环

            Type myType =Type.GetType(class_Name);// 获得“类”类型
            Object o_Instance=System.Activator.CreateInstance(myType); // 实例化类
            // 获得类的所有属性数组
            PropertyInfo[] myPropertyInfo1 = myType.GetProperties(BindingFlags.Public|BindingFlags.Instance);
            // 循环属性数组，并给数组属性赋值
            for(int k=0;k<myPropertyInfo1.Length;k++)
            ...{
                PropertyInfo myPropInfo = (PropertyInfo)myPropertyInfo1[k];
                if  (k==0)
                ...{
                    str_Sql=myPropInfo.Name.ToString();
                }
                else
                ...{
                    str_Sql=str_Sql+","+myPropInfo.Name.ToString();
                }
            
            }
            if (ht_Where=="" || ht_Where==null)
            ...{
                string str_Ht="";
                if (ht!=null) // 用ht做条件
                ...{
                            
                    IDictionaryEnumerator et = ht.GetEnumerator();
                    int k=0;
                    while ( et.MoveNext() )
                    ...{
                        if (k==0)
                        ...{
                            str_Ht=" "+et.Key.ToString()+"=@"+et.Key.ToString();
                        }
                        else
                        ...{
                            str_Ht=str_Ht+" and "+et.Key.ToString()+"=@"+et.Key.ToString();
                        }
                        k=k+1;
                    }
                }
                if (orderby=="" || orderby==null)
                ...{
                    if (str_Ht!="")
                    ...{
                        str_Sql="Select "+str_Sql+" From "+Table+" where "+str_Ht;
                    }
                    else
                    ...{
                        str_Sql="Select "+str_Sql+" From "+Table;
                    }
                }
                else
                ...{
                    if (str_Ht!="")
                    ...{
                        str_Sql="Select "+str_Sql+" From "+Table+" where "+str_Ht+"  order by "+orderby; 
                                
                    }
                    else
                    ...{
                        str_Sql="Select "+str_Sql+" From "+Table;
                    }
                            
                }
                        
            }
            else // 用ht_Where做条件
            ...{
                if (orderby=="" || orderby==null)
                ...{
                    str_Sql="Select "+str_Sql+" From "+Table+" Where "+ht_Where;
                }
                else
                ...{
                    str_Sql="Select "+str_Sql+" From "+Table+" where "+ht_Where+"  order by "+orderby; 
                }
                        
            }
            
            return str_Sql;

        }



    }
}