EditorFor 和 StringLength DataAnnotations

发布于 2024-11-29 19:30:21 字数 557 浏览 3 评论 0原文

我的模型上有以下属性

        [Display(Name = "MyProperty")]
        [StringLength(10)]
        public string MyProperty
        {
            get;set;
        }

和以下 EditorFor 模板

<%@ Page Language="C#" MasterPageFile="Template.Master" Inherits="System.Web.Mvc.ViewPage" %>
<asp:Content ID="Content1" ContentPlaceHolderID="Data" runat="server">
    <%= Html.TextBox("", Model)%>
</asp:Content>

我遇到的问题是 StringLength 属性（可以理解）没有设置为限制文本框大小。我的答案是我应该如何获取要在模板中设置的属性？

谢谢

原文

I have the following property on my Model

        [Display(Name = "MyProperty")]
        [StringLength(10)]
        public string MyProperty
        {
            get;set;
        }

and the following EditorFor template

<%@ Page Language="C#" MasterPageFile="Template.Master" Inherits="System.Web.Mvc.ViewPage" %>
<asp:Content ID="Content1" ContentPlaceHolderID="Data" runat="server">
    <%= Html.TextBox("", Model)%>
</asp:Content>

The problem I have is that the StringLength property (understandably), isn't being set to limit the textbox size. My answer is how should I be obtaining the attributes to set in my template?

Thanks

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苏璃陌 2024-12-06 19:30:21

如果您使用的是 ASP.NET MVC 3 或更高版本，则接受的答案不起作用。您需要更改用于获取值的键：

IEnumerable<ModelValidator> validators = ModelValidatorProviders.Providers
    .GetValidators(ViewData.ModelMetadata, ViewContext);

ModelClientValidationRule rule = validators.SelectMany(v => 
    v.GetClientValidationRules()
).FirstOrDefault(m => m.ValidationType == "length");

if (rule != null && rule.ValidationParameters.ContainsKey("max")) {
    var maxLength = rule.ValidationParameters["max"];
}

The accepted answer doesn't work if you are using ASP.NET MVC 3 or later. You need to change the keys used to get the value:

IEnumerable<ModelValidator> validators = ModelValidatorProviders.Providers
    .GetValidators(ViewData.ModelMetadata, ViewContext);

ModelClientValidationRule rule = validators.SelectMany(v => 
    v.GetClientValidationRules()
).FirstOrDefault(m => m.ValidationType == "length");

if (rule != null && rule.ValidationParameters.ContainsKey("max")) {
    var maxLength = rule.ValidationParameters["max"];
}

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顾铮苏瑾 2024-12-06 19:30:21

元数据属性和验证属性之间存在差异。 StringLengthAttribute 是一个验证属性，因此您无法从 ModelMetadata 获取它。

幸运的是，Wayne Brantley 已经完成了艰苦的工作。以下是他获取验证规则的方式：

IEnumerable<ModelValidator> validators = ModelValidatorProviders.Providers.GetValidators(ViewData.ModelMetadata, ViewContext);
ModelClientValidationRule rule = validators.SelectMany(v => v.GetClientValidationRules()).FirstOrDefault(m => m.ValidationType == "stringLength");
if (rule != null && rule.ValidationParameters.ContainsKey("maximumLength"))
{
   var maxLength = rule.ValidationParameters["maximumLength"];
}

注意：如果您使用的是 ASP.NET MVC 3 或更高版本，则需要将 stringLength 更改为 length 和 maximumLength 到 max。

There is a difference between metadata attributes and validation attributes. StringLengthAttribute is a validation attribute, so you can't get it from ModelMetadata.

Luckily, Wayne Brantley has done the hard work. Here is how he gets the validation rules:

IEnumerable<ModelValidator> validators = ModelValidatorProviders.Providers.GetValidators(ViewData.ModelMetadata, ViewContext);
ModelClientValidationRule rule = validators.SelectMany(v => v.GetClientValidationRules()).FirstOrDefault(m => m.ValidationType == "stringLength");
if (rule != null && rule.ValidationParameters.ContainsKey("maximumLength"))
{
   var maxLength = rule.ValidationParameters["maximumLength"];
}

Note: if you are using ASP.NET MVC 3 or later, you will need to change stringLength to length and maximumLength to max.

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