我一直在寻找了一段时间,并没有找到一个解决办法。
我是一个ASP.NET和MVC4 / Razor2新手,所以我主要是编辑默认的项目。
不管怎样,我的问题是,我使用Twitter的引导,我需要添加一个错误在CSS类 DIV 如果下铺设领域是无效的。
到目前为止,我有这样的:
< DIV CLASS =控制组错误> @ Html.LabelFor(M = GT; m.Password,新{@class =控制标签}) < DIV CLASS =控制> @ Html.PasswordFor(M = GT; m.Password) @ Html.ValidationMessageFor(M = GT; m.Password,空,新的{@class =直列帮助错误}) < / DIV> < / DIV>我应该怎么做才能让剃刀插入错误类中的第一个 DIV 我的片段时,现场是无效的。
更新:我找到了一种方法来做到这一点,但它并不相较于code其余觉得不对劲。有没有更好的办法或者是它的的的方式做到这一点?
< DIV CLASS =控制组@(!(ViewData.ModelState.IsValidField(密码))?错误:),>解决方案
这样的:
公共静态类HtmlHelperExtensions{ 公共静态MvcHtmlString AddClassIfPropertyInError<的TModel,TProperty>( 这与的HtmlHelper LT;的TModel>的HtmlHelper, 防爆pression<&Func键LT;的TModel,TProperty>>前pression, 串errorClassName) { VAR前pressionText =前pressionHelper.GetEx pressionText(如pression); VAR fullHtmlFieldName = htmlHelper.ViewContext.ViewData .TemplateInfo.GetFullHtmlFieldName(如pressionText); VAR状态= htmlHelper.ViewData.ModelState [fullHtmlFieldName] 如果(状态== NULL) { 返回MvcHtmlString.Empty; } 如果(state.Errors.Count == 0) { 返回MvcHtmlString.Empty; } 返回新MvcHtmlString(errorClassName); }}然后在您的视图:
< DIV CLASS =控制组@ Html.AddClassIfPropertyInError(X => x.Email,错误)> <标签类=控制标签>电子邮件和LT; /标签> < DIV CLASS =控制> <输入类型=文本占位符=电子邮件NAME =电子邮件/> <跨度类=求助在线> @ Html.ValidationMessageFor(X => x.Email)LT; / SPAN> < / DIV>< / DIV>I've been searching for a while now and haven't found a solution yet.
I'm an ASP.NET and MVC4/Razor2 newbie, so I'm mostly editing the default project.
Anyway, my issue is that I'm using Twitter Bootstrap and I need to add an error CSS class on a div if the under-laying field is not valid.
So far I have this:
<div class="control-group error"> @Html.LabelFor(m => m.Password, new { @class = "control-label" }) <div class="controls"> @Html.PasswordFor(m => m.Password) @Html.ValidationMessageFor(m => m.Password, null, new { @class = "inline-help error" }) </div> </div>What should I do to make Razor insert the error class in the first div of my snippet when the field is invalid.
UPDATE: I found a way to do it, but it doesn't feel right in comparison to the rest of the code. Is there a better way or is it the way to do it?
<div class="control-group@((!ViewData.ModelState.IsValidField("Password")) ? " error" : "")">解决方案
Like this:
public static class HtmlHelperExtensions { public static MvcHtmlString AddClassIfPropertyInError<TModel, TProperty>( this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, string errorClassName) { var expressionText = ExpressionHelper.GetExpressionText(expression); var fullHtmlFieldName = htmlHelper.ViewContext.ViewData .TemplateInfo.GetFullHtmlFieldName(expressionText); var state = htmlHelper.ViewData.ModelState[fullHtmlFieldName]; if (state == null) { return MvcHtmlString.Empty; } if (state.Errors.Count == 0) { return MvcHtmlString.Empty; } return new MvcHtmlString(errorClassName); } }Then in your view:
<div class="control-group @Html.AddClassIfPropertyInError(x => x.Email, "error")"> <label class="control-label">Email</label> <div class="controls"> <input type="text" placeholder="Email" name="Email" /> <span class="help-inline">@Html.ValidationMessageFor(x => x.Email)</span> </div> </div>
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