为什么 ASP.NET MVC 3 中的 IntelliSense 中没有 @Html.Button？

Question

我看到 @Html.Button() 的引用，但是当我输入它时，IntelliSense 找不到这样的帮助器...有下拉列表、隐藏、编辑器等等，但没有按钮！

这是为什么？

Answer 1

我已经编写了自己的 HTMLButton 扩展，您可以使用它：

public static class HtmlButtonExtension 
{

  public static MvcHtmlString Button(this HtmlHelper helper, 
                                     string innerHtml, 
                                     object htmlAttributes) 
  { 
    return Button(helper, innerHtml,
                  HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes)
    ); 
  }

  public static MvcHtmlString Button(this HtmlHelper helper, 
                                     string innerHtml,
                                     IDictionary<string, object> htmlAttributes)
  {
      var builder = new TagBuilder("button");
      builder.InnerHtml = innerHtml;
      builder.MergeAttributes(htmlAttributes);
      return MvcHtmlString.Create(builder.ToString());
  }
}

Answer 2

要扩展接受的答案，以便您可以将提交按钮绑定到模型属性但具有不同的文本：

@Html.ButtonFor(m => m.Action, Model.LabelForCurrentAction(), new { @class = "btn btn-primary btn-large", type = "submit" })

使用以下内容稍微修改了 Button 辅助类：

/// <summary>
/// Via https://stackoverflow.com/questions/5955571/theres-no-html-button
/// </summary>
public static class HtmlButtonExtension
{

    public static MvcHtmlString Button(this HtmlHelper helper, object innerHtml, object htmlAttributes)
    {
        return helper.Button(innerHtml, HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes));
    }

    public static MvcHtmlString Button(this HtmlHelper helper, object innerHtml, IDictionary<string, object> htmlAttributes)
    {
        var builder = new TagBuilder("button") { InnerHtml = innerHtml.ToString() };
        builder.MergeAttributes(htmlAttributes);
        return MvcHtmlString.Create(builder.ToString());
    }

    public static MvcHtmlString ButtonFor<TModel, TField>(this HtmlHelper<TModel> html,
                                                        Expression<Func<TModel, TField>> property,
                                                        object innerHtml,
                                                        object htmlAttributes)
    {
        // lazily based on TextAreaFor

        var attrs = HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes);

        var name = ExpressionHelper.GetExpressionText(property);
        var metadata = ModelMetadata.FromLambdaExpression(property, html.ViewData);

        string fullName = html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(name);

        ModelState modelState;
        if (html.ViewData.ModelState.TryGetValue(fullName, out modelState) && modelState.Errors.Count > 0)
        {
            if( !attrs.ContainsKey("class") ) attrs["class"] = string.Empty;
            attrs["class"] += " " + HtmlHelper.ValidationInputCssClassName;
            attrs["class"] = attrs["class"].ToString().Trim();
        }
        var validation = html.GetUnobtrusiveValidationAttributes(name, metadata);
        if(null != validation) foreach(var v in validation) attrs.Add(v.Key, v.Value);

        string value;
        if (modelState != null && modelState.Value != null)
        {
            value = modelState.Value.AttemptedValue;
        }
        else if (metadata.Model != null)
        {
            value = metadata.Model.ToString();
        }
        else
        {
            value = String.Empty;
        }

        attrs["name"] = name;
        attrs["Value"] = value;
        return html.Button(innerHtml, attrs);
    }
}

Answer 3

从 mvc 预览版 3（不是 mvc3）开始，没有按钮助手，

过去曾多次提到过，例如：
http://blog.wekeroad.com /blog/aspnet-mvc-preview-using-the-mvc-ui-helpers/
然而，自己动手是微不足道的 - 本质上只需创建一个新的 Html.ButtonFor 并从 Html.LabelFor 复制源代码并更改输出以创建 标记。

Answer 4

MVC5，Bootstrap 版本 3.2.0

@Html.ActionLink
(
    linkText: " Remove", 
    actionName: "Index", 
    routeValues: null, // or to pass some value -> routeValues: new { id = 1 },
    htmlAttributes: new { @class = "btn btn-success btn-sm glyphicon glyphicon-remove" }
)

这将生成一个看起来像按钮的链接。

Answer 5

Razor 似乎没有“按钮”HTML 帮助器。您可能会找到对自定义 HTML 帮助器扩展的引用。

请参阅此处： http://www.asp.net/mvc/教程/创建-custom-html-helpers-cs