使用asp.net MVC的 HtmlHelper 时报错:Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions.

解决办法：

I had the same problem with something like

@foreach (var item in Model)
{
    @Html.DisplayFor(m => !item.IsIdle, "BoolIcon")
}

I solved this just by doing

@foreach (var item in Model)
{
    var active = !item.IsIdle;
    @Html.DisplayFor(m => active , "BoolIcon")
}