@model dynamic
@{
    var value = (ViewData["value"] ?? "").ToString();
    var name = (ViewData["name"] ?? "").ToString();
    var id = (ViewData["name"] ?? "").ToString().Replace(".", "_");
    var df = (ViewData["df"] ?? "").ToString();
    var ph = (ViewData["ph"] ?? "").ToString();
    var cssclass = (ViewData["cssclass"] ?? "").ToString();
    var onchange = (ViewData["onchange"] ?? "").ToString();
    var special = (ViewData["special"] ?? "").ToString();
    var read = "1".Equals((ViewData["read"] ?? "").ToString());
}

<input type="password" class="form-control @cssclass" name="@name" id="@id" value="@(Model??value??"")" placeholder="@ph" @(read ? "readonly=\"read\"" : "") />