我到处找到一半的解决方案,但我无法得到真正的答案。
我创建了一个继承自ValidationAttribute和IClientValidatable的验证属性。
一切似乎都运行良好,如果我在页面上放置验证摘要,则显示错误。
但是我无法在与该属性相关的文本框旁边显示错误。
我认为这是因为我需要将属性名称添加到验证结果中。
然而,这是失败的地方,因为我无法从validationContext获取成员名称。
有没有办法让这种情况发生?或者我错过了什么?
public class AdmissionDayCaseAttribute : ValidationAttribute, IClientValidatable
{
private String DayCaseID;
private String AdmissionDateID;
private String DischargeDateID;
public AdmissionDayCaseAttribute(String DayCaseID, String AdmissionDateID, String DischargeDateID)
{
this.DayCaseID = DayCaseID;
this.AdmissionDateID = AdmissionDateID;
this.DischargeDateID = DischargeDateID;
}
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
object AdmissionDate = GetPropertyValue(validationContext.ObjectInstance, AdmissionDateID);
object DischargeDate = GetPropertyValue(validationContext.ObjectInstance, DischargeDateID);
object AdmissionType = validationContext.MemberName == null ? null : GetPropertyValue(validationContext.ObjectInstance, validationContext.MemberName);
if (AdmissionDate != null && DischargeDate != null && AdmissionType != null)
{
if (AdmissionDate.Equals(DischargeDate) && DayCaseID.Equals(AdmissionType.ToString()))
{
return new ValidationResult(ErrorMessage, new List<String>() { validationContext.MemberName });
}
}
return ValidationResult.Success;
}
private object GetPropertyValue(object instance,String propertyName)
{
Type itype = instance.GetType();
return itype.GetProperty(propertyName).GetValue(instance,null);
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
{
ModelClientValidationRule vr = new ModelClientValidationRule()
{
ErrorMessage = ErrorMessage,
ValidationType = "admissiondaycase"
};
vr.ValidationParameters.Add(new KeyValuePair<string, object>("admissiondateid", AdmissionDateID));
vr.ValidationParameters.Add(new KeyValuePair<string, object>("dischargedateid", DischargeDateID));
vr.ValidationParameters.Add(new KeyValuePair<string, object>("daycaseid", DayCaseID));
yield return vr;
}
修改/更新
视图看起来像这样 -
<tr>
<td>
@Html.LabelFor(x => x.AdmissionTypeID)
</td>
<td>
@Html.CustomDropDownListFor(a => a.AdmissionTypeID, Lookup.AdmissionTypes,Default.Constant.DROPDOWN)
@Html.ValidationMessageFor(a=>a.AdmissionTypeID)
</td>
</tr>
没有javascript或任何与此相互作用的东西,它非常基本但是一些额外的细节 - 此视图代码位于视图模板中,在部分视图中使用
答案 0 :(得分:7)
首先检查模型中属性的AdmissionDayCaseAttribute
是否正确定义。
然后返回validationContext.MemberName
而不是返回validationContext.DisplayName
。如果您通过DsiplayAttribute
修改了成员名称,则可以执行以下操作:
var memberName = validationContext.ObjectType.GetProperties()
.Where(p => p.GetCustomAttributes(false)
.OfType<DisplayAttribute>()
.Any(a => a.Name == validationContext.DisplayName))
.Select(p => p.Name).FirstOrDefault();
return new ValidationResult(ErrorMessage, new List<String>() { memberName });