html.textboxfor() 应该正好是 7 个字符
我需要一个恰好包含 7 个字符的文本框， 为此我写了
Html.TextboxFor(x=>x.Number, new {maxLength = "7"};
这个案例只需要7个字符，但是如果我想少于7个字符，那么需要什么？ 是否有像 maxlength 这样的属性只需要 7 个字符。
问候， 迈克尔·韦拉亚杜
I need a text box which should be exactly of 7 characters,
for which I have written
Html.TextboxFor(x=>x.Number, new {maxLength = "7"};
This case takes me only 7 characters , but if I want to take less than 7, it is taking?
Is there any property like maxlength which takes 7 charecters only.
regards,
michael velayadu
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对于其价值，这些答案都不是很清楚。您想要做的本质上是设置最小和最大长度属性。基本上有几种方法可以使用数据注释来完成此任务。
最简单的方法：
使用 StringLengthAttribute... StringLength 有两个重载方法。两者都有 int 参数
@maximumLength，并且重载之一包括 NamedParameters。因此，对于 maxlength，您不会使用命名参数，但对于 minlength，您会：如果您想真正感到困惑，您也可以这样做：
For what its worth, none of these answers are very clear. What you are trying to do is set a minimum and maximum length attribute essentially. There are basically a few ways you can accomplish this using data annotations.
The easiest way:
Using StringLengthAttribute... StringLength has two overloaded methods. Both have the int parameter
@maximumLengthand one of the overloads includes NamedParameters. So for maxlength you wouldn't use a named parameter but for minlength you would:If you want to be really confusing you could also do it this way:
通过使用正则表达式的 DataAnnotations，您可以强制执行恰好 7 个字符的字符串。 DataAnnotations 也可以在客户端使用，您只需启用它即可。
查看此帖子以获取更多信息： http://weblogs.asp.net/scottgu/archive/2010/01/15/asp-net-mvc-2-model-validation.aspx
With DataAnnotations using regular expressions you can enforce a string of exactly 7 charachters. DataAnnotations can also be used client-side, you just have to enable it.
Check this post for more info: http://weblogs.asp.net/scottgu/archive/2010/01/15/asp-net-mvc-2-model-validation.aspx
您不需要为此创建自定义验证器。您可以使用 StringLength 属性来实现您想要的开箱即用：
You do not need to create a custom validator for this. You can use the StringLength attribute to achieve what you want out of the box:
文本框上没有最小长度的 Html 属性。您可以使用数据注释来强制该字段的最大和最小文本长度...
这是使用数据注释的一个很好的演练：Stephen Walther 在 ASP.Net 上
There is no Html attribute on a textbox for Minimum Length. You can use data annotations to enforce a maximum and minimum text length for that field...
This is a pretty good walkthrough on using data annotations: Stephen Walther on ASP.Net