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copied!<p>Newlines have no effect in HTML, you want a <code><br /></code> tag.</p> <p>You could always roll your own to get more control over the output. Here's the MVC2 source for that helper. It basically looks through the </p> <pre><code>public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper, bool excludePropertyErrors, string message, IDictionary<string, object> htmlAttributes) { if (htmlHelper == null) { throw new ArgumentNullException("htmlHelper"); } FormContext formContext = htmlHelper.ViewContext.GetFormContextForClientValidation(); if (formContext == null && htmlHelper.ViewData.ModelState.IsValid) { 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 = null; if (excludePropertyErrors) { ModelState ms; htmlHelper.ViewData.ModelState.TryGetValue(htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix, out ms); if (ms != null) { modelStates = new ModelState[] { ms }; } } else { modelStates = htmlHelper.ViewData.ModelState.Values; } if (modelStates != null) { foreach (ModelState modelState in modelStates) { foreach (ModelError modelError in modelState.Errors) { string errorText = GetUserErrorMessageOrDefault(htmlHelper.ViewContext.HttpContext, modelError, null /* modelState */); if (!String.IsNullOrEmpty(errorText)) { TagBuilder listItem = new TagBuilder("li"); listItem.SetInnerText(errorText); htmlSummary.AppendLine(listItem.ToString(TagRenderMode.Normal)); } } } } if (htmlSummary.Length == 0) { htmlSummary.AppendLine(_hiddenListItem); } 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) { // client val summaries need an ID divBuilder.GenerateId("validationSummary"); formContext.ValidationSummaryId = divBuilder.Attributes["id"]; formContext.ReplaceValidationSummary = !excludePropertyErrors; } return divBuilder.ToMvcHtmlString(TagRenderMode.Normal); } </code></pre> <p>ValidationSummaryValidCssClassName is "validation-summary-errors" and ValidationSummaryValidCssClassName is "validation-summary-valid".</p>

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