SQL-MAP是PDF.NET(PWMIS数据开发框架)具有特色的开发技术,它能够将SQL语句映射成DAL代码,而且能够一挥而就无需IDAL和DalFactory自动切换数据库到其余一个数据库系统,比如SqlServer切换成Oralcle,有关SQL-MAP的正经请看这里,为何要运用那种技能,请看“抽象SQL(参数化)查询
”。

   
从地点的正统看到,要手写1个SQL-MAP文件恐怕比较复杂,尽管框架提供了SQL-MAP配置文件管理器,但它首要适用于新手使用,用起来成效不是很高,这一年就必要有1个方可只好提示XML文件编制的东西了,那正是SqlMap.xsd,上面贴出该文件的新星完整内容:

 

XML 1XML 2SqlMap.XSD

<?xml version=”1.0″ encoding=”utf-8″ ?>
<xs:schema attributeFormDefault=”unqualified” elementFormDefault=”qualified” xmlns:xs=”http://www.w3.org/2001/XMLSchema"&gt;
    <xs:simpleType name=”enumCmdType” >
        <xs:restriction base =”xs:string”>
            <xs:enumeration value =”Text”></xs:enumeration>
            <xs:enumeration value =”StoredProcedure”></xs:enumeration>
            <xs:enumeration value =”Table”></xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name=”enumResultClass” >
        <xs:restriction base =”xs:string”>
            <xs:enumeration value =”ValueType”></xs:enumeration>
            <xs:enumeration value =”DataSet”></xs:enumeration>
            <xs:enumeration value =”EntityObject”></xs:enumeration>
            <xs:enumeration value =”EntityList”></xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
    <xs:simpleType name=”enumScriptType” >
        <xs:restriction base =”xs:string”>
            <xs:enumeration value =”Access”></xs:enumeration>
            <xs:enumeration value =”SqlServer”></xs:enumeration>
            <xs:enumeration value =”SqlServerCe”></xs:enumeration>
            <xs:enumeration value =”Oracle”></xs:enumeration>
            <xs:enumeration value =”DB2″></xs:enumeration>
            <xs:enumeration value =”Sysbase”></xs:enumeration>
            <xs:enumeration value =”MySql”></xs:enumeration>
            <xs:enumeration value =”SQLite”></xs:enumeration>
            <xs:enumeration value =”PostgreSQL”></xs:enumeration>
            <xs:enumeration value =”UNKNOWN”></xs:enumeration>
        </xs:restriction>
    </xs:simpleType>
    <xs:element name=”SqlMap”>
        <xs:complexType>
            <xs:sequence>
                <xs:element maxOccurs=”unbounded” name=”Script”>
                    <xs:complexType>
                         <xs:sequence>
                            <xs:element maxOccurs=”unbounded” name=”CommandClass”>
                                <xs:complexType>
                                    <xs:sequence>
                                        <xs:choice maxOccurs=”unbounded”>
                                            <xs:element maxOccurs=”unbounded” name=”Select”>
                                                <xs:complexType>
                                                    <xs:simpleContent>
                                                        <xs:extension base=”xs:string”>
                                                            <xs:attribute name=”CommandName” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”CommandType” type=”enumCmdType” use=”required” />
                                                            <xs:attribute name=”Method” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”Description” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”ResultClass” type=”enumResultClass” use=”optional”  default=”DataSet”/>
                                                            <xs:attribute name=”ResultMap” type=”xs:string” use=”optional” />
                                                            <xs:attribute name=”SqlPage” type=”xs:string” use=”optional” default=”False”/>
                                                        </xs:extension>
                                                    </xs:simpleContent>
                                                </xs:complexType>
                                            </xs:element>
                                            <xs:element name=”Insert”>
                                                <xs:complexType>
                                                    <xs:simpleContent>
                                                        <xs:extension base=”xs:string”>
                                                            <xs:attribute name=”CommandName” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”CommandType” type=”enumCmdType” use=”required” />
                                                            <xs:attribute name=”Method” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”Description” type=”xs:string” use=”required” />
                                                        </xs:extension>
                                                    </xs:simpleContent>
                                                </xs:complexType>
                                            </xs:element>
                                            <xs:element name=”Update”>
                                                <xs:complexType>
                                                    <xs:simpleContent>
                                                        <xs:extension base=”xs:string”>
                                                            <xs:attribute name=”CommandName” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”CommandType” type=”enumCmdType” use=”required” />
                                                            <xs:attribute name=”Method” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”Description” type=”xs:string” use=”required” />
                                                        </xs:extension>
                                                    </xs:simpleContent>
                                                </xs:complexType>
                                            </xs:element>
                                            <xs:element name=”Delete”>
                                                <xs:complexType>
                                                    <xs:simpleContent>
                                                        <xs:extension base=”xs:string”>
                                                            <xs:attribute name=”CommandName” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”CommandType” type=”enumCmdType” use=”required” />
                                                            <xs:attribute name=”Method” type=”xs:string” use=”required” />
                                                            <xs:attribute name=”Description” type=”xs:string” use=”required” />
                                                        </xs:extension>
                                                    </xs:simpleContent>
                                                </xs:complexType>
                                            </xs:element>
                                        </xs:choice>
                                    </xs:sequence>
                                    <xs:attribute name=”Name” type=”xs:string” use=”required” />
                                    <xs:attribute name=”Class” type=”xs:string” use=”required” />
                                    <xs:attribute name=”Interface” type=”xs:string” use=”optional” />
                                    <xs:attribute name=”Description” type=”xs:string” use=”required” />
                                </xs:complexType>
                            </xs:element>
                        </xs:sequence>
                        <xs:attribute name=”Type” type=”enumScriptType” use=”required”  />
                        <xs:attribute name=”Version” type=”xs:string” use=”optional” />
                        <xs:attribute name=”ConnectionString” type=”xs:string” use=”optional” />
                    </xs:complexType>
                </xs:element>
            </xs:sequence>
            <xs:attribute name=”EmbedAssemblySource” type=”xs:string” use=”optional” />
        </xs:complexType>
    </xs:element>
</xs:schema>

留意文件中的simpleType
,它代表定义四个自定义的简便类型,在XSD文件的节点中采取 type
属性来引用它即可。

正文中定义了多少个自定义类型enumCmdType,enumResultClass,enumScriptType
,而且是枚举类型(使用xs:enumeration 定义),那样在XML文件中就能够出现“下拉选拔”的升迁意义了。

在节点属性中,use=”required”
表示必须的属性,use=”optional”  表示可选的质量。

任何XSD文件的编写制定要小心的也就这么多,编写起来依旧相比较简单的。

 

有了那个XSD文件,在建立的Sql-Map配置文件的<sqlmap>
标签中,参加那几个XSD的选用表明,就能够见到智能提示的效益了。

 

<SqlMap  

        xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance
        xsi:noNamespaceSchemaLocation=”SqlMap.xsd”>
<!– 在上边敲入尖括号,就可见产出当前节点区域内的相应编写的剧情,来试试吧 –>

</SqlMap>

有了这些SqlMap.config文件,就可见利用代码生成器自动生成DAL代码了。

PDF.NET代码生成器下载地址(包罗框架应用的1体化示例),下载后请看在那之中的表达。

比方程序的数据库不能够开拓,请看看连接字符串是还是不是科学,可能将它附加到SQLSE本田CR-VVEEscort实例上:

connectionString=”Data
Source=.\SQLEXPRESS;AttachDbFilename=~\App_Data\PDFTest.mdf;Integrated
Security=True;Connect Timeout=30;User Instance=True”

 

下载达成后,将本文的SqlMap.xsd内容复制下来另存为文件即可,注意文件目录,假若该XSD文件跟SqlMap.config文件不在同3个,供给修改上边的路线:

xsi:noNamespaceSchemaLocation=”SqlMap.xsd”

 

关于PDF.NET框架的详尽内容,请看自个儿的博客相关内容依旧查看官网:http://www.pwmis.com/sqlmap

 

 

 

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