Question

public class FlaggedPublishedSongViewModel : ValidationAttribute, IClientValidatable
{
    public int Id { get; set; }
    public int PublishedSongId { get; set; }
    public string Reason { get; set; }
    public string AdditionalDetails { get; set; }

    public IEnumerable<ModelClientValidationRule> GetClientValidationRules(ModelMetadata metadata, ControllerContext context)
    {
        var rule = new ModelClientValidationRule();
        rule.ErrorMessage = FormatErrorMessage(metadata.GetDisplayName());
        rule.ValidationParameters.Add("AdditionalDetails", AdditionalDetails);
        rule.ValidationType = "isempty";
        yield return rule;
    }
}

[HttpPost]
public ActionResult RequestDeletion(FlaggedPublishedSongViewModel song)
{
    db.FlaggedPublishedSongs.Add(song);

    db.SaveChanges();

    TempData["UserMessage"] = "Thank you for the report";

    return RedirectToAction("Index");
}

@model SoundVast.Areas.Music.Models.FlaggedPublishedSongViewModel

@using (Html.BeginForm())
{
      @Html.AntiForgeryToken()

      @Html.HiddenFor(x => Model.PublishedSongId)

      @Html.RadioButtonFor(x => x.Reason, "Quality", new { @class = "radio-button-list" })     
      @Html.RadioButtonFor(x => x.Reason, "Duplicate", new { @class = "radio-button-list" }) 
      @Html.RadioButtonFor(x => x.Reason, "Copyright", new { @class = "radio-button-list" }) 
      @Html.RadioButtonFor(x => x.Reason, "Inappropriate", new { @class = "radio-button-list" }) 
      @Html.RadioButtonFor(x => x.Reason, "Other", new { @class = "radio-button-list" }) 

      @Html.TextAreaFor(x => Model.AdditionalDetails, new { @class = "additional-details", @placeholder = "Please be specific about any additional details" })

      <br />
      <button class="btn btn-default">Flag Song</button>
}

Jquery文件：

jQuery.validator.unobtrusive.adapters.addSingleVal("isempty", "AdditionalDetails");

jQuery.validator.addMethod("isempty",
    function (val, element, other) {
        var modelPrefix = element.name.substr(
                            0, element.name.lastIndexOf(".") + 1)
        var otherVal = $("[name=" + modelPrefix + other + "]").val();
        if (val && otherVal) {
            if (val.toUpperCase() == "OTHER" && other.length <= 0) {
                return false;
            }
        }
        return true;
    }
);

我正在尝试为"Other"单选复选框和文本区域添加客户端验证。从ValidationAttribute转发似乎导致错误：“值不能为空。\ r \ nParameter name：entitySet”，当我尝试对我的数据库执行任何操作时，例如db.PublishedSongs.ToList（）;

如果我不从这个基类继承，我的应用程序会运行，但验证器.addMethod永远不会运行。我还包括Jquery验证ajax和验证unob。 jquery addSingleVal和addMethod都被声明为没有错误，所以我认为这是我的viewmodel错误。

MVC IClientValidatable Value不能为null。\ r \ nParameter name：entitySet

0 个答案: