Converting string to boolean to use boolean display template in MVC3

Question

I have a model that I have little control over. It has a string property called Pass that contains a "1" to represent a pass, and a "0" to represent a fail.

I also have a display template that replaces boolean properties with a particular image, depending if the boolean value is true or false.

When I try to use @Html.DisplayFor(c => (c.Pass == "1")) in my Razor template, I get a

System.InvalidOperationException: Templates can be used only with field access, property access, single-dimension array index or single parameter custom indexer expressions.

How can I modify my view so that c.Pass == "1" is interpreted as a true value, and make use of the boolean display template that is available to me.

Zabavsky · Accepted Answer · 2014-04-14 06:43:56Z

2

You can create a boolean variable in the view:

@{ var pass = Model.Pass == "1"; }
@Html.DisplayFor(c => pass)

answered Apr 14, 2014 at 6:43

Zabavsky

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Ashutosh · Accepted Answer · 2014-04-14 06:43:12Z

1

Use a custom display template.

1) In the model, add a attribute e.g.-

 [UIHint("PassFail")]
    public decimal Pass { get; set; }

2) Create a Display Template PassFail.cshtml @model string

@if (Model == "1")
{
    <text>Pass</text>
}
else
{
    <text>Fail</text>
}

3) Now you can directly use

@Html.DisplayFor(e => e.Pass)

answered Apr 14, 2014 at 6:43

Ashutosh

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