首页 > 代码库 > MVC验证13-2个属性至少输入一项
MVC验证13-2个属性至少输入一项
有时候，我们希望2个属性中，至少有一个是必填，比如：
using Car.Test.Portal.Extension;namespace Car.Test.Portal.Models{public class Person
{public int Id { get; set; }
public string Telephone { get; set; }
public string Address { get; set; }
}
}
如果让Telephone和Address属性中，有一个是必填项，需要自定义特性。
□ 自定义AtLeastOneAttribute特性，派生于ValidationAttribute类，并实现IClientValidatable接口
using System;using System.ComponentModel;using System.ComponentModel.DataAnnotations;using System.Globalization;using System.Web.Mvc;namespace Car.Test.Portal.Extension{[AttributeUsage(AttributeTargets.Class, AllowMultiple = true, Inherited = true)]
public sealed class AtLeastOneAttribute : ValidationAttribute, IClientValidatable
{public string PrimaryProperty { get; private set; }
public string SecondaryProperty { get; private set; }
public AtLeastOneAttribute(string primaryProperty, string secondProperty)
{PrimaryProperty = primaryProperty;
SecondaryProperty = secondProperty;
}
public override string FormatErrorMessage(string name)
{return string.Format(CultureInfo.CurrentCulture, this.ErrorMessageString, PrimaryProperty, SecondaryProperty);
}
public override bool IsValid(object value)
{ PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(value);object primaryValue = http://www.mamicode.com/properties.Find(PrimaryProperty, true /* ignoreCase */).GetValue(value);
object secondaryValue = http://www.mamicode.com/properties.Find(SecondaryProperty, true /* ignoreCase */).GetValue(value);
if (primaryValue != null || secondaryValue != null)
{return true;
}
else {return false;
}
//return (primaryValue != null || secondaryValue != null); //稍稍改动以下还可以比较2个属性是否相等 //if (!primaryValue.Equals(secondaryValue)) // return true; //else // return false;}
public System.Collections.Generic.IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context) {string errorMessage = FormatErrorMessage("");
ModelClientValidationRule rule = new ModelClientValidationRule() { ValidationType = "atleastone",ErrorMessage = errorMessage
};
rule.ValidationParameters.Add("primary", this.PrimaryProperty);
rule.ValidationParameters.Add("secondary", this.SecondaryProperty);
yield return rule;
}
}
}
□ 把自定义特性AtLeastOneAttribute打到类上
using Car.Test.Portal.Extension;namespace Car.Test.Portal.Models{[AtLeastOne("Telephone", "Address",ErrorMessage = "Telephone和Address至少填一项~~")]
public class Person
{public int Id { get; set; }
public string Telephone { get; set; }
public string Address { get; set; }
}
}
□ PersonController
public class PersonController : Controller
{ public ActionResult Index() {return View(new Person());
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Index(Person person) { if (ModelState.IsValid) { //TODO:return Content("ok");
}
else { return View(person);}
}
}
<style type="text/css"> .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }</style>
□ Person/Index.cshtml
需要把自定义的特性注册到jquery相关类库中。
@model Car.Test.Portal.Models.Person
<body>
<script src=http://www.mamicode.com/"~/Scripts/jquery-1.10.2.js"></script> <script src=http://www.mamicode.com/"~/Scripts/jquery-migrate-1.2.1.min.js"></script> <script src=http://www.mamicode.com/"~/Scripts/jquery.validate.min.js"></script> <script src=http://www.mamicode.com/"~/Scripts/jquery.validate.unobtrusive.min.js"></script> @*<script src=http://www.mamicode.com/"~/Scripts/atleastone.js"></script>*@ <style type="text/css"> .validation-summary-errors {color: red;
}
</style>
<script type="text/javascript">jQuery.validator.addMethod("atleastone", function (value, element, params) {
var primaryProperty = params.primary; var secondaryProperty = params.secondary; if (primaryProperty.length > 0 || secondaryProperty.length > 0) {return true;
} else {return false;
}
});
jQuery.validator.unobtrusive.adapters.add("atleastone", ["primary", "secondary"], function (options) {
options.rules["atleastone"] = { primary: options.params.primary, secondary: options.params.secondary};
options.messages["atleastone"] = options.message;});
</script>
@using (Html.BeginForm()) {@Html.AntiForgeryToken()
@Html.ValidationSummary(true)<fieldset>
<legend>Person</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Telephone)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Telephone)
@Html.ValidationMessageFor(model => model.Telephone)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Address)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Address)
@Html.ValidationMessageFor(model => model.Address)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
</body>
</html>
□ 效果
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。