ASP.NET MVC 4将模型从视图传递给html帮助器

Question

I want to pass my ViewModel(not IEnumerable) to my custom html helper

I was doing on IEnumerable like this:

Helper:

public static IHtmlString GenerateTable<TModel, TValue>(this HtmlHelper<TModel> inHtml, IEnumerable<TValue> model)

View:

@Html.GenerateTable(Model)

But how i can pass model which is not IEnumerable to helper?

I Tried this:

public static MvcHtmlString MyHelper<TModel>(this HtmlHelper<TModel> html, object obj)
        {}

but when i call it like this

@Html.MyHelper(Model)

obj is always NULL

Answer 1

Try like this:

public static MvcHtmlString MyHelper<TModel>(this HtmlHelper<TModel> htmlHelper)
{
    TModel model = htmlHelper.ViewData.Model;
    // TODO: do something with the model ...
}

and in your strongly typed view:

@model MyViewModel
@Html.MyHelper()

Answer 2

我已经尝试过你的代码并且它工作正常，如果模型已经初始化......所以我认为你应该检查@nemesv的建议但是我会澄清，当你调用视图时应该检查传递模型......你需要检查模型并确保它不为空