asp:RequiredFieldValidator 不验证隐藏字段 [英] asp:RequiredFieldValidator does not validate hidden fields

问题描述

似乎 ASP.NET 验证器不验证隐藏字段.我收到这样的消息:

It seems that ASP.NET validators do not validate hidden fields. I get messages like this:

无法验证由hiddenFieldValidator"的 ControlToValidate 属性引用的控件hiddenField".

Control 'hiddenField' referenced by the ControlToValidate property of 'hiddenFieldValidator' cannot be validated.

我的页面中有一个 <asp:HiddenField>，它用一些值填充客户端.我需要它在服务器上出现一次，所以我向它添加了一个 RequiredFieldValidator.

I have an <asp:HiddenField> in my page which gets filled client side with some value. I need this to be present once on the server so I added a RequiredFieldValidator to it.

它不起作用！

据我所知，作为一种解决方法，我可以:

As I see it, as a workaround, I can:

1. 使用自定义验证器，不要将其绑定到隐藏字段，只需在 OnServerValidate 上调用一个方法；

1. use a custom validator and not tie it to the hidden field, just call a method on OnServerValidate;

2. 将 与 CSS 样式 display:none 一起使用，它应该可以工作.

2. Use a <asp:TextBox> with a CSS style display:none and it should work.

但我想确保我没有在这里遗漏任何东西.是否可以以与其他文本字段相同的方式验证隐藏字段?或许还有第三种更优雅的选择?

But I want to make sure I am not missing something here. Is it possible or not to validate a hidden field in the same way as the other text fields? O maybe a third, more elegant option?

TIA！

推荐答案

正如您收到的异常消息所说，HiddenField 控件似乎无法直接成为标准验证控件的目标.我会使用 CustomValidator 解决方法.

Just as the exception message you're getting says, it seems HiddenField controls can't be targeted by the standard validation controls directly. I would go with the CustomValidator workaround.

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