如何在ASP.NET MVC中擴展ValidationSummary HTML Helper？

Question

我需要將驗證摘要包裝在div中 。 當出現錯誤時，如何設置驗證摘要以將其包裝為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個項目中擴展驗證摘要擴展，以處理頁面上的多個表單。

雖然這有所不同，但您可以創建自己的擴展方法......

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 "";
        }
    }
}

然后打電話

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

HTHs，查爾斯

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

對於MVC 2，ValidationSummary是一種擴展方法，您必須添加

using System.Web.Mvc.Html;

Answer 4

例如，將此CSS用於li標簽...

.validation-summary-errors ul li {color:Red;}