如何在自定义@HtmlHelper中使用@HtmlHelper?

问题描述

我正在尝试使用ASP.NET MVC创建自定义HTML帮助器.我有以下代码:

I am trying to create a custom Html helper with ASP.NET MVC. I have the following code:

@helper DefaultRenderer(Models.Control control)
{
  <div class="form-group">
    <label class="control-label" for="@control.Name">@control.Label</label>
    @Html.TextBoxFor(m => control.Value, new { @class = "form-control" })
  </div>
}

显然，在Helper .cshtml类中找不到@ Html.TextBoxFor.我可以在也是.cshtml类的局部视图中使用它.

Apparently @Html.TextBoxFor cannot be found inside a Helper .cshtml class. I can use it in a partial view which is also a .cshtml class.

我可以使用@HtmlTextBox，但随后我将失去强大的模型绑定...

I can use @HtmlTextBox but then I will lose the strong model binding...

为什么会发生这种情况，并且有办法使其正常工作?

Why is this happening and is there a way to get it to work?

推荐答案

否，这是不可能的.您无法使用 @ Html.TextBoxFor 编写普通的HTML helper ，因为该视图是强类型的.所以你需要像这样的东西:

No, this is not possible. You could not write a normal HTML helper with @Html.TextBoxFor because that your view is strongly typed.So you need something like:

public class HelperExtentions{

     public static MvcHtmlString DefaultRenderer<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, Control control , object htmlAttributes)
        {
            var sb = new StringBuilder();
            var dtp = htmlHelper.TextBoxFor(expression, htmlAttributes).ToHtmlString();
            sb.AppendFormat("<div class='form-group'><label class='control-label' for='{1}'>{2}</label>{0}</div>", dtp,control.Name,control.Label);
            return MvcHtmlString.Create(sb.ToString());
        }
}

然后您可以使用:

@html.DefaultRenderer(m => m.Control.Value, Models.Control,new { @class = "form-control" }

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