检查局部视图内模型属性的空值

Question

I am working on a asp.net mvc 3 application and I've made several partial views each one responsible for rendering of specific logic. Inside one of my views I use properties which can be null, but I don't want to pass null to the @Html.DisplayFor() and write something more user friendly to the user to know that these fields are not missing, they just don't have nothing assigned to them yet.

So I try this :

<tr>        
            <td>   
                @if (!string.IsNullOrEmpty(Model[0][0].FieldValue))
                {            
                    @Html.DisplayFor(Model => Model[0][0].FieldValue)
                }
            </td>
            <td>
                @Html.DisplayFor(Model => Model[1][0].FieldValue) 
            </td>
        </tr>

I don't have else clause because writing the if statement results in getting both Model => in the DisplayFor marked with red and the following message :

A local variable named 'Model' can not be declared in this scope because it would give a different meaning to 'Model' which is already used in a 'parent or current' scope to denote something.

Basically I think I understand what this error means however I don't know how to check for null properly in this situation.

Answer 1

The error message is caused by the redefinition of the Model variable. Try

@Html.DisplayFor(x => x[0][0].FieldValue)

You might find this SO question useful to understand the "=>" thingie.