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AJAX for PHP简单表数据查询实例

Jun 13, 2016 pm 12:35 PM
ajax for p php introduce Function Example start support data query Simple surface

功能介绍:AJAX WebShop 3从Beta2开始支持PHP的开发了,AJAX WebShop集成了PHP5的开发环境,因此不需要额外安装配置PHP,本例将实现一个AJAX for PHP的简单数据查询操作,这个例子是单表操作,也可以实现主从表的数据查询。

一.数据表说明
例子采用了Access数据库,当然你也可以使用mysql 或其他类型数据库,数据库名称为:demo.mdb,表名为product,创建字段分别是PRODUCT_ID, PRODUCT_NAME, PRODUCT_PRICE, PRODUCT_AREA。

二.实现数据查询
首先启动AJAX WebShop 3,在File中选择“New Project”建立新工程。

图1
在弹出的New Project对话框中设置projectname 和web server本例中设置projectname为:php_example和设置web server为:PHP。如果要修改工程路径,请在Directory中设置要存放的路径。

图2
设置好New Project后,再打开“File”选择“New .PHP Service”,在弹出的对话框内目录输入子目录demo,设置”Class Name”为:simple_query;在ServiceType中选择“Query Data”点击“OK“后,向导将按默认模板生成php单表查询的代码。

图3
输入以下数据库连接及sql代码(demo.mdb文件放在当前代码目录下):$c.realpath($_SERVER['PATH_TRANSLATED'])."\demo.mdb";
$sql     = "select * from product";
$sqlcount     =  "select count(*) from product";


  分析testquery.php代码,主要的实现如下:
1.       循环数据结构,用addField向$xmlRequest填充字段(列):              //fill metadata fields 
       

复制代码 代码如下:

 for ($i=1; $i            $fieldname = odbc_field_name($result_id, $i);    
            $datatype  = odbc_field_type($result_id, $i);  
            $xmlRequest->addField($fieldname, $datatype);   
        } 

 

2. 循环结果集记录,调用Append() ,SetValue方法,向xmlrequest每一行对应字段填充数据:        //fill data rows 
       

复制代码 代码如下:

 for ($i=0; $i                     odbc_fetch_row($result_id); 
                     if($i>=$recNo && $i                            $xmlRequest->append(); 
                      for ($j=1; $j                                   $xmlRequest->setValueByIndex($j-1, odbc_result($result_id, $j)); 
                            } 
                     } 
                     if($i>=$recNo+$maxRows) break; 
              }

 

3.  设置分页的相关参数,$xmlRequest->recNo是开始记录,$xmlRequest->maxRows是每页记录数,通过执行"select count(*) from product"得到$record_count记录总数:             

复制代码 代码如下:

 $sqlcount     =  "select count(*) from product"; 
              $result_id    = @odbc_do($connid, $sqlcount); 
        if($result_id==null) 
           throw new Exception($sqlcount); 
              odbc_fetch_row($result_id); 
              $record_count =  odbc_result($result_id,1);      
              $xmlRequest->setRecordCount($record_count);  
              $recNo        = $xmlRequest->recNo; 
              $maxRows      = $xmlRequest->maxRows; 
              if($maxRows==-1) $maxRows = $record_count; 
  

后台数据访问类建立好后,在“File”中选择“New Page”打开“New Page”对话框在“File Name”中设置页面名称,如本例“simple.htm”点击ok完成设置。

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