从此answer我已经从这个博客 DevTrends 编写了我的代码用于执行自定义数据注释验证。但在客户端站点中的 $.validator.addMethod( ) 方法中,出现以下图像中的错误。请帮助我解决这个问题。
message :"value is not defined"
stack : "ReferenceError: value is not defined↵ at eval (eval at <anonymous> (http://localhost:61052/boatproduction/edit/2?pg=1&sz=10&st=id&dr=desc:71:13), <anonymous>:1:1)↵ at http://localhost:61052/boatproduction/edit/2?pg=1&sz=10&st=id&dr=desc:1279:13↵ at http://localhost:61052/boatproduction/edit/2?pg=1&sz=10&st=id&dr=desc:1288:10"
我的 View 模型如下所示
public class BoatProductionModel
{
public long Id { get; set; }
public DateTime StartDate { get; set; }
[DateComparison("StartDate")]
public DateTime LastUpdate { get; set; }
public int? NumberOfEmployee { get; set; }
}
[AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = true)]
public sealed class DateComparison : ValidationAttribute
{
private const string DefaultErrorMessage = "{0} cannot be the same as {1}.";
public string OtherProperty { get; private set; }
public DateComparison(string otherProperty)
: base(DefaultErrorMessage)
{
if (string.IsNullOrEmpty(otherProperty))
{
throw new ArgumentNullException("otherProperty");
}
OtherProperty = otherProperty;
}
public override string FormatErrorMessage(string name)
{
return string.Format(ErrorMessageString, name, OtherProperty);
}
protected override ValidationResult IsValid(object value,
ValidationContext validationContext)
{
if (value != null)
{
var otherProperty = validationContext.ObjectInstance.GetType()
.GetProperty(OtherProperty);
var otherPropertyValue = otherProperty
.GetValue(validationContext.ObjectInstance, null);
if (value.Equals(otherPropertyValue))
{
return new ValidationResult(
FormatErrorMessage(validationContext.DisplayName));
}
}
return null; //return ValidationResult.Success;
}
public IEnumerable<ModelClientValidationRule>
GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
var clientValidationRule = new ModelClientValidationRule()
{
ErrorMessage = FormatErrorMessage(metadata.GetDisplayName()),
ValidationType = "notequalto"
};
clientValidationRule.ValidationParameters.Add("otherproperty", OtherProperty);
return new[] { clientValidationRule };
}
}
这是我在 View 中使用的代码:
Razor 代码:
@model Data.AppModels.BoatProductionModel
@Html.TextBoxFor(model => model.LastUpdate, "{0:MM/dd/yyyy}", new { @class = "form-control pull-right", placeholder = "Last Update" })
@Html.ValidationMessageFor(model => model.LastUpdate)
JavaScript 代码:
(function ($) {
$.validator.addMethod("notequalto", function (value, element, params) {
if (!this.optional(element)) {
var otherProp = $('#' + params)
return (otherProp.val() != value);
}
return true;
});
$.validator.unobtrusive.adapters.addSingleVal("notequalto", "otherproperty");
}(jQuery));
最佳答案
您的自定义属性未实现 IClientValidatable
(尽管您已包含该接口(interface)中定义的 GetClientValidationRules()
方法)。因此,data-val- *
与您的属性关联的属性不会在 html 中生成,因此 jquery.validate.unobtrusive.js
不会将规则添加到 jquery.validate.js
将验证属性的签名更改为
public sealed class DateComparison : ValidationAttribute, IClientValidatable
{
....
}
您输入的 html 现在将包含以下属性
data-val-notequalto="LastUpdate cannot be the same as StartDate." data-val-notequalto-otherproperty="StartDate"
将由jquery.validate.unobtrusive.js
解析。
另请注意,您不需要将脚本包装在 (function ($) {
关于jquery - 客户端站点上的自定义数据注释验证 : $. validator.addMethod 错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47815536/