我想在不知道键值的情况下获得modelState中的所有错误消息。循环获取ModelState包含的所有错误消息。
我该怎么做呢?
我想在不知道键值的情况下获得modelState中的所有错误消息。循环获取ModelState包含的所有错误消息。
我该怎么做呢?
当前回答
这个代码片段也很有用,它为您提供了一个包含错误消息的列表。
var errors = ModelState.Values。SelectMany(x => x. errors。Select(c => c. errormessage)).ToList();
其他回答
这是对@Dunc的回答的扩展。参见xml文档注释
// ReSharper disable CheckNamespace
using System.Linq;
using System.Web.Mvc;
public static class Debugg
{
/// <summary>
/// This class is for debugging ModelState errors either in the quick watch
/// window or the immediate window.
/// When the model state contains dozens and dozens of properties,
/// it is impossible to inspect why a model state is invalid.
/// This method will pull up the errors
/// </summary>
/// <param name="modelState">modelState</param>
/// <returns></returns>
public static ModelError[] It(ModelStateDictionary modelState)
{
var errors = modelState.Values.SelectMany(x => x.Errors).ToArray();
return errors;
}
}
这个代码片段也很有用,它为您提供了一个包含错误消息的列表。
var errors = ModelState.Values。SelectMany(x => x. errors。Select(c => c. errormessage)).ToList();
在您的实现中,您缺少静态类,这应该是。
if (!ModelState.IsValid)
{
var errors = ModelStateErrorHandler.GetModelErrors(this.ModelState);
return Json(new { errors });
}
而
if (!ModelState.IsValid)
{
var errors = ModelState.GetModelErrors();
return Json(new { errors });
}
为了以防有人需要它,我在我的项目中创建并使用下面的静态类
使用的例子:
if (!ModelState.IsValid)
{
var errors = ModelState.GetModelErrors();
return Json(new { errors });
}
Usings:
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using WebGrease.Css.Extensions;
类:
public static class ModelStateErrorHandler
{
/// <summary>
/// Returns a Key/Value pair with all the errors in the model
/// according to the data annotation properties.
/// </summary>
/// <param name="errDictionary"></param>
/// <returns>
/// Key: Name of the property
/// Value: The error message returned from data annotation
/// </returns>
public static Dictionary<string, string> GetModelErrors(this ModelStateDictionary errDictionary)
{
var errors = new Dictionary<string, string>();
errDictionary.Where(k => k.Value.Errors.Count > 0).ForEach(i =>
{
var er = string.Join(", ", i.Value.Errors.Select(e => e.ErrorMessage).ToArray());
errors.Add(i.Key, er);
});
return errors;
}
public static string StringifyModelErrors(this ModelStateDictionary errDictionary)
{
var errorsBuilder = new StringBuilder();
var errors = errDictionary.GetModelErrors();
errors.ForEach(key => errorsBuilder.AppendFormat("{0}: {1} -", key.Key,key.Value));
return errorsBuilder.ToString();
}
}
用于将错误消息数组传递给View,可能通过Json:
messageArray = this.ViewData.ModelState.Values.SelectMany(modelState => modelState.Errors, (modelState, error) => error.ErrorMessage).ToArray();