Question

我正在使用XMADL编写跨平台移动应用。我在本地数据库中有一个表'user'，其中包含firstname，lastname，email，pwd列。如何在调用userprofile屏幕时显示数据？配置文件屏幕定义为

    <controls>
        <control name="labelfirstname" type="TEXT" x="2" y="3" width="30" height="8" 
                appearance_name="black" data_type="VARCHAR" 
                default_value="First Name"/>
        <control name="editfirstname" type="EDIT" x="35" y="2" width="50" height="8" 
                appearance_name="edit_box" data_type="VARCHAR" field_name="firstname" 
                default_value="" size="80"/>
        <control name="labellastname" type="TEXT" x="2" y="12" width="30" height="8"
                appearance_name="black" data_type="VARCHAR" 
                default_value="Last Name"/>
        <control name="editlastname" type="EDIT" x="35" y="12" width="50" height="8" 
                appearance_name="edit_box" data_type="VARCHAR" field_name="lastname" 
                default_value="" size="80"/>
        <control name="labelemail" type="TEXT" x="2" y="22" width="30" height="8" 
                appearance_name="black" data_type="VARCHAR" 
                default_value="Email"/>
        <control name="editemail" type="TEXT" x="35" y="22" width="50" height="8" 
                appearance_name="black" data_type="VARCHAR" field_name="email" 
                default_value="" size="80"/>
        <control name="labelpassword" type="TEXT" x="2" y="32" width="30" height="8" 
                appearance_name="black" data_type="VARCHAR" 
                default_value="Password"/>
        <control name="editpassword" type="PASSWORD" x="35" y="32" width="50" height="8" 
                appearance_name="edit_box" word_wrap="0" data_type="VARCHAR" field_name="password" 
                default_value="" size="80"/>
    </controls>
</screen>

Answer 1

您可以通过定义screen attribute“local_data_source = sql query”从本地数据库中获取数据并显示在屏幕上。

用下面的代码替换你的元素。

    <screen name="userprofile" screen_type="SCREEN" allow_reorientation="true" allowed_layouts="BOTH" scroll="VERTICAL"
        width="100" height="100" local_data_source="select lastname, firstname, email, password from user_details where email=&apos;&lt;email&gt;&apos;">

查询结果将是column_name / value对。如果数据表的column_name与控件的field_name匹配，则将为该值分配该值。

一旦调用了屏幕，数据将从数据库中获取，并通过field_name firstname，lastname，email和pwd提供给控件。

XMADL - 从本地数据库中获取数据

1 个答案: