如果用剃刀视图中的html助手？

Question

I will like to use IF ELSE statement in Razor view. Is it possible to use IF( html.helper ) then do something? Or any suggestion?

@using (Html.BeginForm())
{
    <table>

            @for (int i = 0; i < Model.Count; i++)
            {
                <tr>
                    <td>
                        @Html.HiddenFor(m => m[i].Question_ID)
                        @Html.HiddenFor(m => m[i].Type)
                        @Html.DisplayFor(m => m[i].Question)
                    </td>
                </tr>
                <tr>
                    @if(@Html.DisplayFor(m=> m[i].Type =="Info_Text") **
                    {
                        <td>
                              //DO NOTHING
                        </td>                
                    }
                    else
                    { 
                    <td>
                        @Html.EditorFor(m => m[i].Answer)
                    </td>
                    }
                </tr>
            }

    </table>

Answer 1

As I mentioned in my comment, you can test the value of m[i].Type directly:

@if (m[i].Type == "Info_Text") {
  <td></td>
} else {
  <td>@Html.EditorFor(m => m[i].Answer)</td>
}

The reason you wouldn't test against the value of DisplayFor is that it returns an MvcHtmlString , not just a simple type like a string or int . You could do something like this if you ever find the need to compare to a DisplayFor some day (and hopefully this makes it all make a little more sense):

@if (Html.DisplayFor(m => m[i].Type) == new MvcHtmlString("Info_Text"))

Since you're in the process of learning MVC, you might also be interested in how you can customize the EditorFor helper to do this automatically: http://www.hanselman.com/blog/ASPNETMVCDisplayTemplateAndEditorTemplatesForEntityFrameworkDbGeographySpatialTypes.aspx

Answer 2

Why do you have to use DisplayFor? Do you have any particular reason?

How about if you use

if(Model[i].Type =="Info_Text")
{
<td>
    //DO NOTHING
</td>
}