C# 如何基于复选框值验证文本框
我正在尝试根据复选框值验证文本框。请查看我的模型类和IsValid重写方法C# 如何基于复选框值验证文本框,c#,asp.net-mvc,asp.net-mvc-4,C#,Asp.net Mvc,Asp.net Mvc 4,我正在尝试根据复选框值验证文本框。请查看我的模型类和IsValid重写方法 public class Product { //Below property value(HaveExperiance) [MustBeProductEntered(HaveExperiance)] public string ProductName { get; set; } public bool HaveExperiance { get; set; } } public cl
public class Product
{
//Below property value(HaveExperiance)
[MustBeProductEntered(HaveExperiance)]
public string ProductName { get; set; }
public bool HaveExperiance { get; set; }
}
public class MustBeTrueAttribute : ValidationAttribute
{
//Here i need the value of HaveExperiance property which
//i passed from [MustBeProductEntered(HaveExperiance)] in product class above.
public override bool IsValid(object value)
{
return value is bool && (bool)value;
}
}
您可以在product
类中的ProductName
属性中看到上面我试图传递HaveExperiance
类属性值的内容,如果选中该属性值,则用户必须填写ProductName
文本框
因此,我最初的问题是如何根据HaveExperiance
值验证ProductName
文本框,请提前感谢
编辑:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Data.Entity;
using System.Linq;
using System.Reflection;
using System.Web;
using System.Web.Mvc;
namespace Mvc.Affiliates.Models
{
public class MyProducts
{
[Key]
[Required(ErrorMessage = "Please insert product id.")]
public string ProductId { get; set; }
[RequiredIf("HaveExperiance")]
public string ProductName { get; set; }
public bool HaveExperiance { get; set; }
public List<MyProducts> prolist { get; set; }
}
public class RequiredIfAttribute : ValidationAttribute
{
private RequiredAttribute _innerAttribute = new RequiredAttribute();
public string Property { get; set; }
public object Value { get; set; }
public RequiredIfAttribute(string typeProperty)
{
Property = typeProperty;
}
public RequiredIfAttribute(string typeProperty, object value)
{
Property = typeProperty;
Value = value;
}
public override bool IsValid(object value)
{
return _innerAttribute.IsValid(value);
}
}
public class RequiredIfValidator : DataAnnotationsModelValidator<RequiredIfAttribute>
{
public RequiredIfValidator(ModelMetadata metadata, ControllerContext context, RequiredIfAttribute attribute) : base(metadata, context, attribute) { }
public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
{
return base.GetClientValidationRules();
}
public override IEnumerable<ModelValidationResult> Validate(object container)
{
PropertyInfo field = Metadata.ContainerType.GetProperty(Attribute.Property);
if (field != null)
{
var value = field.GetValue(container, null);
if ((value != null && Attribute.Value == null) || (value != null && value.Equals(Attribute.Value)))
{
if (!Attribute.IsValid(Metadata.Model))
{
yield return new ModelValidationResult { Message = ErrorMessage };
}
}
}
}
}
查看
@model Mvc.Affiliates.Models.MyProducts
@{
ViewBag.Title = "Index";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>Details</h2>
<br />
<div style="height:200px; width:100%">
@using (Html.BeginForm("Index","Home", FormMethod.Post))
{
<h2>Details</h2>
@Html.LabelFor(model => model.ProductId)
@Html.TextBoxFor(model => model.ProductId)
@Html.LabelFor(model => model.ProductName)
@Html.EditorFor(model => model.ProductName)
@Html.ValidationMessageFor(model => model.ProductName, "*")
@Html.CheckBoxFor(model => model.HaveExperiance)
@Html.ValidationMessageFor(model => model.HaveExperiance, "*")
<input type="submit" value="Submit" />
}
</div>
@model Mvc.Affiliates.Models.MyProducts
@{
ViewBag.Title=“Index”;
Layout=“~/Views/Shared/_Layout.cshtml”;
}
细节
@使用(Html.BeginForm(“Index”,“Home”,FormMethod.Post))
{
细节
@LabelFor(model=>model.ProductId)
@Html.TextBoxFor(model=>model.ProductId)
@Html.LabelFor(model=>model.ProductName)
@Html.EditorFor(model=>model.ProductName)
@Html.ValidationMessageFor(model=>model.ProductName,“*”)
@CheckBoxFor(model=>model.HaveExperiance)
@Html.ValidationMessageFor(model=>model.HaveExperiance,“*”)
}
到目前为止,我已经尝试了上面的代码,实际上我需要当我点击复选框,然后它应该开始验证我的产品名称文本框,如果取消选中,然后不。我在上面的代码中遗漏了一点,请帮助并纠正我。这是一个完整的示例,介绍了如何基于另一个属性创建自定义验证属性:
public class RequiredIfAttribute : ValidationAttribute
{
private RequiredAttribute _innerAttribute = new RequiredAttribute();
public string Property { get; set; }
public object Value { get; set; }
public RequiredIfAttribute(string typeProperty) {
Property = typeProperty;
}
public RequiredIfAttribute(string typeProperty, object value)
{
Property = typeProperty;
Value = value;
}
public override bool IsValid(object value)
{
return _innerAttribute.IsValid(value);
}
}
public class RequiredIfValidator : DataAnnotationsModelValidator<RequiredIfAttribute>
{
public RequiredIfValidator(ModelMetadata metadata, ControllerContext context, RequiredIfAttribute attribute) : base(metadata, context, attribute) { }
public override IEnumerable<ModelClientValidationRule> GetClientValidationRules()
{
return base.GetClientValidationRules();
}
public override IEnumerable<ModelValidationResult> Validate(object container)
{
PropertyInfo field = Metadata.ContainerType.GetProperty(Attribute.Property);
if (field != null) {
var value = field.GetValue(container, null);
if ((value != null && Attribute.Value == null) || (value != null && value.Equals(Attribute.Value))) {
if (!Attribute.IsValid(Metadata.Model)) {
yield return new ModelValidationResult { Message = ErrorMessage };
}
}
}
}
}
注册RequiredIfValidator
需要此部件,否则MVC将仅使用RequiredIfValidator
忽略RequiredIfValidator
如果要验证ProductName
是否HaveExperiance
具有值:
[RequiredIf("HaveExperiance")]
public string ProductName { get; set; }
如果要仅在HaveExperiance
为false时验证ProductName
:
[RequiredIf("HaveExperiance", false)]
public string ProductName { get; set; }
如果要仅在HaveExperiance
为true时验证ProductName
:
[RequiredIf("HaveExperiance", true)]
public string ProductName { get; set; }
在requirediftAttribute
class I中创建了一个RequiredAttribute
对象,仅用于验证传递给IsValid
方法的值
属性
字段用于保存激活验证的属性的名称。它在类RequiredIfValidator
中使用,以使用反射获取字段当前值(field.GetValue(container,null)
)
当您在代码中调用验证时(例如,当您首先调用if(TryValidateModel(model))
),如果某些条件有效((value!=null&&Attribute.value==null)| |(value!=null&&value.Equals(Attribute.value))
)
最后一件事。由于RequiredIfAttribute
继承自ValidationAttribute
,因此您还可以使用与任何其他验证属性相同的错误消息
[RequiredIf("HaveExperiance", true, ErrorMessage = "The error message")]
public string ProductName { get; set; }
[RequiredIf("HaveExperiance", true, ErrorMessageResourceName = "ResourceName", ErrorMessageResourceType = typeof(YourResourceType))]
public string ProductName { get; set; }
建议您使用
[RequiredIfTrue]
或类似的验证属性。但是,如果您想编写自己的验证属性,那么这是一个很好的起点,如果您添加一些解释作为well@ArijitMukherjee我希望现在更好:-)太好了,是的,现在对大家都有帮助谢谢你的回复,你的例子看起来很酷,将在今天运行并响应,感谢您的详细解释。@erikscandola我已经尝试了您的代码。请参阅我原始问题中的编辑:代码,请帮助纠正我缺少的内容?谢谢。
[RequiredIf("HaveExperiance", true)]
public string ProductName { get; set; }
[RequiredIf("HaveExperiance", true, ErrorMessage = "The error message")]
public string ProductName { get; set; }
[RequiredIf("HaveExperiance", true, ErrorMessageResourceName = "ResourceName", ErrorMessageResourceType = typeof(YourResourceType))]
public string ProductName { get; set; }