Question

我对这种Coldfusion语言还很陌生，我做了一些教程，我只是按照课程告诉我的去做，但是由于这段代码出现错误，有人可以向我解释为什么？

<cfset carrinho=ArrayNew(1)>

<cfset carrinho[1]=StructNew()>
<cfset carrinho[1].nome="Camisa da Seleção Brasileira">
<cfset carrinho[1].valor=189>
<cfset carrinho[1].quantidade=1>

<cfset carrinho[2]=StructNew()>
<cfset carrinho[2].nome="Chuteira CR7">
<cfset carrinho[2].valor=470>
<cfset carrinho[2].quantidade=2>

<cfset carrinho[3]=StructNew()>
<cfset carrinho[3].nome="Short do Messi">
<cfset carrinho[3].valor=180>
<cfset carrinho[3].quantidade=1>

<cfdump var="#carrinho#">

<cfloop list="#carrinho#" item="name" index="i">
    <cfoutput>
        #i#:#name#
    </cfoutput>
</cfloop>

Answer 1

原因是<tr><td> <%= if(rs.getString("delivery0delivery_address_2") != null){ rs.getString("delivery0delivery_address_2") } else{ %> <br> <%= } %>是一个数组，而不是列表。您可以用许多不同的方式循环它。

使用carrinho属性进行循环的方法
```
array
```
DEMO
通过<cfset counter=1> <cfloop array="#carrinho#" index="item"> <cfoutput>#counter#. #item.nome#</cfoutput> <cfset counter++> </cfloop>使用索引循环
```
ArrayLen
```
DEMO
使用<cfloop from="1" to="#ArrayLen(carrinho)#" step="1" index="i"> <cfoutput>#i#. #carrinho[i].nome#</cfoutput> </cfloop> cfscript循环
```
for
```
DEMO

这些只是一些方法。还有许多其他方法可以做到这一点。

Answer 2

以RRK的答案和Ageax的评论为基础：在ColdFusion脚本中构建带有嵌套结构的数组非常容易。

注意：

“ //” =评论

“ []” =隐式数组

“ {}” =隐式结构

<cfscript>

  // Build the array with structs.
  carrinho = [  
    {    
        nome : "Camisa da Seleção Brasileira" ,
        valor : 189 ,
        quantidade : 1
    } ,
    { 
        nome : "Chuteira CR7" ,
        valor : 470 ,
        quantidade : 2
    } ,
    { 
        nome : "hort do Messi" ,
        valor : 180 ,
        quantidade : 1
    }
  ] ;

  // Using the counter method to determine the number     
  counter=1 ;
  for(item in carrinho) {
    writeoutput(counter & ". " & item.nome & "<br>") ; 
    counter++;
  }


  // Using each() member function
  carrinho.each(function(element, index) {
      writeOutput(index & ". " & element.nome & "<br>");

  });  

</cfscript>

DEMO

输出：

Camisa daSeleçãoBrasileira

Chuteira CR7

梅西霍特

Answer 3

这是您的解决方案

<cfset carrinho=ArrayNew(1)>

<cfset carrinho[1]=StructNew()>
<cfset carrinho[1].nome="Camisa da Seleção Brasileira">
<cfset carrinho[1].valor=189>
<cfset carrinho[1].quantidade=1>

<cfset carrinho[2]=StructNew()>
<cfset carrinho[2].nome="Chuteira CR7">
<cfset carrinho[2].valor=470>
<cfset carrinho[2].quantidade=2>

<cfset carrinho[3]=StructNew()>
<cfset carrinho[3].nome="Short do Messi">
<cfset carrinho[3].valor=180>
<cfset carrinho[3].quantidade=1>

<cfdump var="#carrinho#">

<cfloop array="#carrinho#" index="i">
    <cfoutput>
        #i.nome#
    </cfoutput>
</cfloop>

您应该使用数组而不是列表。

Answer 4

这是一个CF10示例，它循环出数组，然后使用一个内循环来循环出代表数组每个索引的结构：

public CtrlScroll() {
        InitializeComponent();

        scbMain.Scroll += ( sender, e ) => {
            //Normally the if statement whouldn't be needed but the metro srollbar
            //has a weird behaviour when the scroll value becomes max
            if( scbMain.Value > panel1.Height - this.Height ) {
                panel1.Top = -( panel1.Height - this.Height );
            }
            else {
                panel1.Top = -scbMain.Value;
            };
        };

        int maxVertical = panel1.Height;

        // SmallChange is typically 1%.
        int smallChangeVertical = Math.Max( (int)( maxVertical / 100 ), 1 );

        // LargeChange is one page.
        int largeChangeVertical = this.Height;

        scbMain.Minimum = 0;
        scbMain.Maximum = maxVertical;
        scbMain.SmallChange = smallChangeVertical;
        scbMain.LargeChange = largeChangeVertical;
    }

标签CFLOOP的属性验证错误

4 个答案: