情况一:查询类似 id>13 and id<15 这样的语句
<select id="SelectStudentRange" parameterClass="Hashtable" resultClass="Student">
select * from student
<dynamic prepend="where">
<isGreaterEqual prepend="and" property="id1" compareValue="0" >
<![CDATA[id>=#id1#]]>
</isGreaterEqual>
<isGreaterEqual prepend="and" property="id2" compareValue="0">
<![CDATA[id<=#id2#]]>
</isGreaterEqual>
</dynamic>
</select>
参数使用了Hashtable,
因为像"<"，">"这样的符号在xml文档中是有意义的，所以使用了<![CDATA[ sql语句写在这里 ]]>这样的语句包起来转义
Student类中的方法
public IList<Student> SelectRange(Hashtable ht)
{
return mapper.QueryForList<Student>("SelectStudentRange", ht);
}
调用
ht.Add("id1", 13);
ht.Add("id2", 15);
IList<Student> s1 = new Student().SelectRange(ht); //select * from student where id>13 and id<15
情况二：查询类似 id in(13,14) 这样的语句
<select id="SelectStudentRange1" resultClass="Student">
select * from student
<dynamic prepend="where">
<iterate open="id in(" close=")" conjunction=",">
#[]#
</iterate>
</dynamic>
</select>
<iterate>节点是一个递归语法，递归的开始用open，结束用close，中间用，相隔
#[]# 就代表数组的每一项了
Student类中的方法
public IList<Student> SelectRange1(int[] ids)
{
return mapper.QueryForList<Student>("SelectStudentRange1", ids);
}
调用
IList<Student> s = new Student().SelectRange1(new int[] { 13, 14 }); //select * from student where id in(13,14)