在MVC中的字段验证 [英] Field Validations in MVC

问题描述

我想执行我在我的工作的MVC应用程序查看现场验证。例如 -

I would like to enforce field validations on my Views in the MVC app that I am working on. For example -

• 限制字段的长度为40


• 确保只有字母数字和特殊字符@＃$％&放大器; *（）-_ +] [';：？，！可以输入

我用下面的限制字段长度：

I used the following to restrict the field length:

<div>
<%= Html.TextBoxFor(c => c.CompanyName, new { style = "width:300px", maxlength = "40" })%></div>

我如何确保只有字母数字和特殊字符可以在文本框输入？

How do I ensure that only alphanumeric and special characters can be entered in the textboxes?

编辑：
我改变了我的模型的属性。

I changed the property in my model to

        [DataMember(EmitDefaultValue = false)]
        [Required(ErrorMessage="CompanyName is Required")]
        [StringLength(40, ErrorMessage = "Must be under 40 characters")]
        public string CompanyName { get; set; }

要测试我试图挽救一个空白的公司名称希望能得到一个服务器错误，因为它是必需的。然而，这样可以节省空公司名称。 ？任何想法可能丢失

To test I tried saving a blank CompanyName hoping to get a Server Error since it is Required. However, it saves the blank Company Name. Any ideas what might be missing?

推荐答案

只要创建一个视图模型对象是这样的：

Just create a ViewModel object like this:

class Company
{
    [Required]
    [StringLength(40)]
    [RegularExpression(@"someregexhere")]
    public string CompanyName { get; set; }
}

和绑定您查看该模型。通过这种方式，你会同时拥有服务器端和客户方的验证。这真的很容易。

And bind your View to that model. In this way you'll have both serverside and clientside validation. It's really easy.

@model Company

@using (Html.BeginForm()) {
    Html.EditorFor(x => x.CompanyName)

    <input type="submit" value="Save" />
}

呵呵，这个示例使用剃刀（MVC3），BTW MVC2的作品几乎是同样据我所知。

Oh, this example uses Razor (MVC3), btw MVC2 works pretty much the same as far as I know.

然后，只需通过检查ModelState.IsValid验证在你的控制器传入的视图模型。

Then just validate the incoming ViewModel in your controller by checking ModelState.IsValid.

这篇关于在MVC中的字段验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！