逻辑循环Thorugh菜单 [英] Logic In Looping Thorugh Menu

问题描述

我的逻辑有点困难，想知道是否有人可以提供帮助.

基本上我有一个如下的订单清单:

< ul>
< li>第一项</li>
< li>第二项</li>
< li>项目3</li>
< li>项目4</li>
</ul>
< ul>
< li>项目5</li>
< li>第六项</li>
< li>项目7</li>
< li>项目8</li>
</ul>

我要遍历数据表并在构建过程中建立一个字符串.见下文

对于i = 0到dt.rows.count-1
如果我的mod 3 = 0，那么
str_val + =< ul>"
如果结束

str_val + =< li>项目一</li>"

如果我mod 3 0那么
str_val + =</ul>"
如果结束
下一个

我遇到的问题是在第一组迭代之后，它关闭了有序列表，但随后又没有再次打开它.

有人有类似的问题吗?如果是这样，将不胜感激.

问候
McGann

I am having a bit of difficulty in my logic and was wondering if anyone could help.

Basically I have an order list like below:

<ul>
<li>Item One</li>
<li>Item Two</li>
<li>Item Three</li>
<li>Item Four</li>
</ul>
<ul>
<li>Item Five</li>
<li>Item Six</li>
<li>Item Seven</li>
<li>Item Eight</li>
</ul>

I am iterate through a datatable and building up a string as I go. See Below

For i = 0 to dt.rows.count - 1
If i mod 3 = 0 then
str_val +="<ul>"
End If

str_val +="<li>Item One</li>"

If i mod 3 0 then
str_val +="</ul>"
End If
Next

The problem I am having is after the first group of iterations it closes the ordered list but then doesn''t open it again.

Has anyone had a similiar problem? If so any help is much appreciated.

Regards
McGann

推荐答案

当然会.
在循环开始时，您的i = 0
i mod 3 = 0-您打开< ul>
然后添加一个元素
并关闭< ul>标签在同一迭代中.

对于下一次迭代，您有i = 1
我mod 3 = 1，它既不打开也不关闭.

可能的解决方案如下所示:

Of course it will.
At start your loop you have i = 0
i mod 3 = 0 - you open <ul>
then add an element
and closed <ul> tag inside same iteration.

for next iteration you have i = 1
i mod 3 = 1 and it neither opens nor closes.

possible solution may look like this:

For i = 0 to dt.rows.count - 1
      If i mod 3 = 2 then ' 2 is because it actually is 3 -1 
            str_val +="</ul>"
      End If

      If i mod 3 = 0 then
            str_val +="<ul>"
      End If

      str_val +="<li>Item One</li>"

      If i mod 3 0 then
            str_val +="</ul>"
      End If
Next

if dt.rows.count > 0 then
            str_val +="</ul>"
end if

顺便说一句，为什么要使用3，如果您要在一个组中有4个项目，则应该使用4(在关闭标签的第一个检查中为3).

By the way why are you using 3, if you want to have 4 items in a group you should use 4 (and 3 in the first check which closes the tag).

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