如何在ASP.NET MVC中扩展ValidationSummary HTML Helper？

Question

我需要将验证摘要包装在div中.当出现错误时,如何设置验证摘要以将其包装为div？

<div class="validation-summary"> 
  <%= Html.ValidationSummary("Login was unsuccessful. Please correct the errors and try again.") %>
</div>

Answer 1

我不得不在我的另一个项目中扩展验证摘要扩展,以处理页面上的多个表单.

虽然这有所不同,但您可以创建自己的扩展方法......

namespace System.Web.Mvc
{
    public static class ViewExtensions
    {
        public static string MyValidationSummary(this HtmlHelper html, string validationMessage)
        {
            if (!html.ViewData.ModelState.IsValid)
            {
                return "<div class=\"validation-summary\">" + html.ValidationSummary(validationMessage) + "</div>"
            }

            return "";
        }
    }
}

然后打电话

<%= Html.MyValidationSummary(
    "Login was unsuccessful. Please correct the errors and try again.") %>

HTHs,查尔斯

Answer 2

你能做的是:

<%if (!ViewData.ModelState.IsValid) { %>
<div class="validation-summary"> 
    <%= Html.ValidationSummary(
        "Login was unsuccessful. Please correct the errors and try again.") %>
</div>
<% } %>

Answer 3

对于MVC 2,ValidationSummary是一种扩展方法,您必须添加

using System.Web.Mvc.Html;