Classic-ASP形式的可变数量的输入字段 [英] Variable Number of Input Fields in Classic-ASP form

问题描述

我有一个结帐表格，其中产品数量可以为"n".那么我如何知道表单中有多少个输入字段并从中获取输入呢?

I have a check out form where number of products can be "n". So how i can know how many input fields are in the form and take input from it?

谢谢

推荐答案

如果它是一组单个控件(例如，表示项目的复选框数量可变)，则解决方案非常简单.对于您的复选框:

If it's a group of single controls - say a variable number of checkboxes representing items - the solution is pretty straightforward. For your checkboxes:

<input type="checkbox" name="ProductID" value="1" />Product #1<br />
<input type="checkbox" name="ProductID" value="2" />Product #2<br />
<input type="checkbox" name="ProductID" value="3" />Product #3

然后在您的ASP中，您可以执行以下操作:

Then in your ASP, you could do this:

<%
  Dim intID

  For Each intID In Request.Form("ProductID")
    ' intID now represents a selected product ID.  Insert into DB
    ' or whatever your process is.  Note that only the "checked" values
    ' will be passed to the server.
  Next
%>

实际上，这种方法适用于任何数量的具有相同名称的控件.如果名称为"FavoriteColor"的文本框为1-n个，则可以用相同的方式通过For Each遍历每个值.没有用户输入的文本框将不会被传递.

In fact, this approach will work for any number of controls with the same name. If it were 1 - n number of textboxes with the name "FavoriteColor", you could For Each through each value in the same manner. Textboxes with no user input would not be passed.

现在，如果您的结帐表单中每个项目都包含一组输入控件，则可以通过仔细命名其他控件来建立该方法:

Now, if your checkout form contains a group of input controls per item, you can build on that approach by carefully naming your other controls:

<div>
<input type="checkbox" name="ProductID" value="1" />Product #1<br />
<input type="textbox" name="Product1_Quantity">
<input type="textbox" name="Product1_Color">
</div>

<div>
<input type="checkbox" name="ProductID" value="2" />Product #2<br />
<input type="textbox" name="Product2_Quantity">
<input type="textbox" name="Product2_Color">
</div>

<div>
<input type="checkbox" name="ProductID" value="3" />Product #3
<input type="textbox" name="Product3_Quantity">
<input type="textbox" name="Product3_Color">
</div>

再次，现在，您可以在服务器上以这种方式解析数据:

Now, again, on the server you could parse the data in this way:

<%
  Dim intID
  Dim intQuantity
  Dim strColor

  For Each intID In Request.Form("ProductID")
    ' this is a selected item
    intQuantity = Request.Form("Product" & intID & "_Quantity")
    strColor = Request.Form("Product" & intID & "_Color")
  Next
%>

您将能够以这种方式对每组所选项目执行验证和其他逻辑.

You'd be able to perform validation and other logic on each group of selected items in this manner.

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