Setting visibility of a textbox in MVC3 Razor view engine

This will change the display type based on your bool Model.EnableCompanyName :)

Hope it helps!

@{
String displayMode = (Model.EnableCompanyName) ? "inline" : "none";
@Html.TextBox("CompanyName", "", new { style = "display:" + displayMode + ";" })
}

It's nothing to do with razor as such. visible is not a valid attribute for an input element (which is what Html.TextBox will be generating). You need

@Html.TextBox("CompanyName", "", new { style = "display:none;" })

See this example here:

http://jsfiddle.net/QxSpU/

Updated:

@Html.TextBox("CompanyName", "", new { style = Model.EnableCompanyName ? "display:inline" : "display:none" })