Running Totals--在RTF文档中，声明变量进行计算

设备运行环境：测试
时间区间：begin_time至end_time共计t.00小时
服务器断线时长：server_time秒
RtotalVar
设备平均在线比率：0.00 %
注：掉线时长统计有时长误差，因为，最后一次掉线时长在统计截止时间没有数据，无法统计最后一次掉线时间差。

总计时长：	sum online秒	sum downline秒
设备编号	设备在线时长（秒）	设备掉线时长（秒）	在线比例（％）
F eq_id	online	downline	onlineratio E ％

本文详解：
RtotalVar：<?xdoxslt:set_variable($_XDOCTX, 'RTotalVar', 0)?>这是声名一个全局变量，将0值给这个变量

0.00：<?xdoxslt:set_variable($_XDOCTX, 'RTotalVar', xdoxslt:get_variable($_XDOCTX, 'RTotalVar') + (sum(online)) div (sum(online)+sum(downline))* 100)?>
在这里做了一个计算，用总时长sum(online)除以总时长加上总掉线时长(sum(online)+sum(downline))，再乘以100％得出的数加上变量'RTotalVar'的值，赋给变量'RTotalVar'。
<?xdoxslt:get_variable($_XDOCTX, 'RTotalVar')?>
显示这个变量

看下结果：72.71％是我们在word文档里计算出来的数字



下面是帮助中的例子：

Running Totals

The variable functionality (see Using Variables) can be used to add a running total to your invoice listing report. This example assumes the following XML structure:

<?xml version="1.0" encoding="WINDOWS-1252"?>

<INVOICES>

<INVOICE>

<INVNUM>10001-1</INVNUM>

<INVDATE>1-Jan-2005</INVDATE>

<INVAMT>100</INVOICEAMT>

</INVOICE>

<INVOICE>

<INVNUM>10001-2</INVNUM>

<INVDATE>10-Jan-2005</INVDATE>

<INVAMT>200</INVOICEAMT>

</INVOICE>

<INVOICE>

<INVNUM>10001-1</INVNUM>

<INVDATE>11-Jan-2005</INVDATE>

<INVAMT>150</INVOICEAMT>

</INVOICE>

</INVOICES>

Using this XML, we want to create the report that contains running totals as shown in the following figure:

To create the Running Total field, define a variable to track the total and initialize it to 0. The template is shown in the following figure:

The values for the form fields in the template are shown in the following table:

Form Field	Syntax	Description
RtotalVar	<?xdoxslt:set_variable($_XDOCTX, 'RTotalVar', 0)?>	Declares the "RTotalVar" variable and initializes it to 0.
FE	<?for-each:INVOICE?>	Starts the Invoice group.
10001-1	<?INVNUM?>	Invoice Number tag
1-Jan-2005	<?INVDATE?>	Invoice Date tag
100.00	<?xdoxslt:set_variable($_XDOCTX, 'RTotalVar', xdoxslt:get_variable($_XDOCTX, 'RTotalVar') + INVAMT)?> xdoxslt:get_variable($_XDOCTX, 'RTotalVar')?>	Sets the value of RTotalVar to the current value plus the new Invoice Amount. Retrieves the RTotalVar value for display.
EFE	<?end for-each?>	Ends the INVOICE group.