asp.net-mvc-2 – 在ASP.NET MVC 2中自定义ValidationSummary

发布时间：2020-12-16 06:36:15 所属栏目：asp.Net 来源：网络整理

导读：我想在ASP.NET MVC 2中自定义ValidationSummary的html输出从 div class="validation-summary-errors" spanOops! validation was failed because:/span ul liThe Title field is required./li liThe Body field is required./li /ul/div 至 div class="valid

我想在ASP.NET MVC 2中自定义ValidationSummary的html输出

从

<div class="validation-summary-errors">
    <span>Oops! validation was failed because:</span>
    <ul>
        <li>The Title field is required.</li>
        <li>The Body field is required.</li>
    </ul>
</div>

至

<div class="validation-error">
    <p>Oops! validation was failed because:</p>
    <ul>
        <li>The Title field is required.</li>
        <li>The Body field is required.</li>
    </ul>
</div>

asp.net MVC 2有什么新方法可以解决这个问题吗？

解决方法

似乎没有任何方法可以用模板来做,这很差.如果你看一下这个特定助手方法的代码,你会看到HTML被烘焙到方法本身：

public static string ValidationSummary(this HtmlHelper htmlHelper,string message,IDictionary<string,object> htmlAttributes) {
    // Nothing to do if there aren't any errors
    if (htmlHelper.ViewData.ModelState.IsValid) {
        return null;
    }

    string messageSpan;
    if (!String.IsNullOrEmpty(message)) {
        TagBuilder spanTag = new TagBuilder("span");
        spanTag.MergeAttributes(htmlAttributes);
        spanTag.MergeAttribute("class",HtmlHelper.ValidationSummaryCssClassName);
        spanTag.SetInnerText(message);
        messageSpan = spanTag.ToString(TagRenderMode.Normal) + Environment.NewLine;
    }
    else {
        messageSpan = null;
    }

    StringBuilder htmlSummary = new StringBuilder();
    TagBuilder unorderedList = new TagBuilder("ul");
    unorderedList.MergeAttributes(htmlAttributes);
    unorderedList.MergeAttribute("class",HtmlHelper.ValidationSummaryCssClassName);

    foreach (ModelState modelState in htmlHelper.ViewData.ModelState.Values) {
        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));
            }
        }
    }
}

好消息是,MVC是开源的,你可以从the CodePlex repository获取源代码并以你喜欢的方式调整它.

（编辑：李大同）

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