mvc3 ValidationSummary排除属性错误IValidatableObject

Question

我的模型(A类)有一个B类属性(称为b)并已IValidatableObject实现.

视图已经有了 @Html.ValidationSummary(true)

在验证摘要中,我想排除与属性相关的错误.在B类IValidatableObject实现中返回ValidationResult没有memberNames

但是IValidatableObject由于B类是A类的属性,因此不会显示B类的Valiadtion错误

如何显示B类非属性验证错误？

Answer 1

找出 MVC3 的源代码并进行编辑以允许包含属性。

@Html.ValidationSummary(new [] { "PropertyName" })

将包含名为 PropertyName 的属性

@Html.ValidationSummary(new [] { "ArrayName[]" })

将包括属性 ArrayName[0]、ArrayName[1] 等。

@Html.ValidationSummary(new [] { "ArrayName[]", "PropertyName" })

将包括两者。

public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper, string[] includePropertyErrors)
{
    return ValidationSummary(htmlHelper, includePropertyErrors, null, null);
}

public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper, string[] includePropertyErrors, string message)
{
    return ValidationSummary(htmlHelper, includePropertyErrors, message, null);
}

public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper, string[] includePropertyErrors, string message, IDictionary<string, object> htmlAttributes)
{
    if (htmlHelper == null)
    {
        throw new ArgumentNullException("htmlHelper");
    }

    FormContext formContext = htmlHelper.ViewContext.ClientValidationEnabled ? htmlHelper.ViewContext.FormContext : null;
    if (htmlHelper.ViewData.ModelState.IsValid)
    {
        if (formContext == null)
        {  // No client side validation
            return null;
        }

        // TODO: This isn't really about unobtrusive; can we fix up non-unobtrusive to get rid of this, too?
        if (htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
        {  // No client-side updates
            return null;
        }
    }

    string messageSpan;
    if (!string.IsNullOrEmpty(message))
    {
        TagBuilder spanTag = new TagBuilder("span");
        spanTag.SetInnerText(message);
        messageSpan = spanTag.ToString(TagRenderMode.Normal) + Environment.NewLine;
    }
    else
    {
        messageSpan = null;
    }

    StringBuilder htmlSummary = new StringBuilder();
    TagBuilder unorderedList = new TagBuilder("ul");

    IEnumerable<ModelState> modelStates = from ms in htmlHelper.ViewData.ModelState
                                            where ms.Key == htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix ||
                                                includePropertyErrors.Any(property =>
                                                {
                                                    string prefixedProperty = string.IsNullOrEmpty(htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix) ? property : htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix + "." + property;
                                                    if (property.EndsWith("[]"))
                                                    {
                                                        return prefixedProperty.Substring(0, property.Length - 2) == Regex.Replace(ms.Key, @"\[[^\]]+\]", string.Empty);
                                                    }
                                                    else
                                                    {
                                                        return property == ms.Key;
                                                    }
                                                })
                                            select ms.Value;

    if (modelStates != null)
    {
        foreach (ModelState modelState in modelStates)
        {
            foreach (ModelError modelError in modelState.Errors)
            {
                string errorText = GetUserErrorMessageOrDefault(htmlHelper.ViewContext.HttpContext, modelError);
                if (!String.IsNullOrEmpty(errorText))
                {
                    TagBuilder listItem = new TagBuilder("li");
                    listItem.SetInnerText(errorText);
                    htmlSummary.AppendLine(listItem.ToString(TagRenderMode.Normal));
                }
            }
        }
    }

    if (htmlSummary.Length == 0)
    {
        htmlSummary.AppendLine(@"<li style=""display:none""></li>");
    }

    unorderedList.InnerHtml = htmlSummary.ToString();

    TagBuilder divBuilder = new TagBuilder("div");
    divBuilder.MergeAttributes(htmlAttributes);
    divBuilder.AddCssClass((htmlHelper.ViewData.ModelState.IsValid) ? HtmlHelper.ValidationSummaryValidCssClassName : HtmlHelper.ValidationSummaryCssClassName);
    divBuilder.InnerHtml = messageSpan + unorderedList.ToString(TagRenderMode.Normal);

    if (formContext != null)
    {
        if (!htmlHelper.ViewContext.UnobtrusiveJavaScriptEnabled)
        {
            // client val summaries need an ID
            divBuilder.GenerateId("validationSummary");
            formContext.ValidationSummaryId = divBuilder.Attributes["id"];
            formContext.ReplaceValidationSummary = false;
        }
    }

    return new MvcHtmlString(divBuilder.ToString(TagRenderMode.Normal));
}

private static string GetUserErrorMessageOrDefault(HttpContextBase httpContext, ModelError error)
{
    return string.IsNullOrEmpty(error.ErrorMessage) ? null : error.ErrorMessage;
}