Question

我指的是之前标记为正确答案的SO Coldfusion Calculate Sum Total (Loop? )，但该代码对我不起作用。

我正在尝试从几个领域创建一个总计。但我收到的错误是“未定义变量xxx”。这是因为我试图从循环中为所有记录附加值

<cfoutput>
<cfquery name="ActivityReceipts" dbtype="query">
    SELECT
          activity,
          qty_approved,
          location,
          payment_amount, 
          shipping_cost,
          handling_cost 
   FROM   rc.RC1
   WHERE  id_number = '#Receipts.id_number#'
</cfquery>

<cfloop query="ActivityReceipts">
<tr>
<td style="text-align:left;">#ActivityReceipts.activity#</td>
<td style="text-align:left;">#ActivityReceipts.qty_approved#</td>
<td style="text-align:left;">#ActivityReceipts.location#</td>
<td style="text-align: right; padding-right: 80px;">#ActivityReceipts.payment_amount#</td>
</tr>

<cfset grandTotal =  grandTotal + ( #ActivityReceipts.payment_amount# + #ActivityReceipts.handling_cost# + #ActivityReceipts.Shipping_cost# ) />

</cfloop>


<td>#grandTotal#</td>
</cfoutput>

请注意，如果我将grandTotal变量设置行更改为

<cfset grandTotal =  ( #ActivityReceipts.payment_amount# + #ActivityReceipts.handling_cost# + #ActivityReceipts.Shipping_cost# ) />

它不会导致错误，但它也只会汇总最后一行，而不是所有这些。

Answer 1

你需要在循环之前为grandtotal var设置默认值...

<cfset grandTotal = 0>

此外，如果您不打算输出或引用var，则无需输入井号。

<cfset grandTotal =  grandTotal + ( ActivityReceipts.payment_amount + ActivityReceipts.handling_cost + ActivityReceipts.Shipping_cost ) />

Answer 2

你必须像这样初始化grandTotal：

<cfset grandTotal = 0>
<cfloop query="ActivityReceipts">
    <tr>
        <td style="text-align:left;">#ActivityReceipts.activity#</td>
        <td style="text-align:left;">#ActivityReceipts.qty_approved#</td>
        <td style="text-align:left;">#ActivityReceipts.location#</td>
        <td style="text-align: right; padding-right: 80px;">
            #ActivityReceipts.payment_amount#
       </td>
   </tr>

   <cfset grandTotal =  grandTotal + ( ActivityReceipts.payment_amount 
                                       + ActivityReceipts.handling_cost 
                                       + ActivityReceipts.Shipping_cost 
                                   ) />
</cfloop>

Answer 3

这是一种没有循环的方法。

grandTotal = ArraySum(ActivityReceipts["payment_amount"])
+ ArraySum(ActivityReceipts["handling_cost"])
+ ArraySum(ActivityReceipts["Shipping_cost"]);

Answer 4

您必须先定义并初始化变量grandTotal，然后才能执行<cfset grandTotal = grandTotal + ...之类的语句。做一些像：

  ...
</cfquery>

<cfset grandTotal= 0>

<cfloop query="ActivityReceipts">
  ...

Answer 5

在循环之前从<cfset grandtotal=0>开始。由于你在循环中引用它并且没有初始化，所以你得到了未定义。

cfloop中的求和值

5 个答案: