How to set disabled in MVC htmlAttribute

Question

When using an HTML Helper, what is the best method to set an attribute based on a condition. For example

<%if (Page.User.IsInRole(\"administrator\")) {%&g         


        

Answer 1

Using @SLaks suggestion to use an Extension method, and using Jeremiah Clark's example Extension method I've written an extension method so I can now do

Html.TextBoxFor(m => m.FirstName,new{class='contactDetails', ...},Page.User.IsInRole("administrator"));

Not Sure if there's a better method though

public static class InputExtensions
{

    public static IDictionary<string, object> TurnObjectIntoDictionary(object data)
    {
        var attr = BindingFlags.Public | BindingFlags.Instance;
        var dict = new Dictionary<string, object>();
        if (data == null)
            return dict;
        foreach (var property in data.GetType().GetProperties(attr))
        {
            if (property.CanRead)
            {
                dict.Add(property.Name, property.GetValue(data, null));
            }
        }
        return dict;

    }

    public static MvcHtmlString TextBoxFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, object htmlAttributes, bool disabled)
    {
        IDictionary<string, object> values =  TurnObjectIntoDictionary(htmlAttributes);

        if (disabled)
            values.Add("disabled","true");


        return htmlHelper.TextBoxFor(expression, values);
    }

    public static MvcHtmlString TextAreaFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, object htmlAttributes, bool disabled)
    {
        IDictionary<string, object> values = TurnObjectIntoDictionary(htmlAttributes);

        if (disabled)
            values.Add("disabled", "true");


        return htmlHelper.TextAreaFor(expression, values);
    }

    public static MvcHtmlString CheckBoxFor<TModel>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, bool>> expression, object htmlAttributes, bool disabled)
    {
        IDictionary<string, object> values = TurnObjectIntoDictionary(htmlAttributes);

        if (disabled)
            values.Add("disabled", "true");


        return htmlHelper.CheckBoxFor(expression, values);
    }
}

Answer 2

It works for me as well...

<%: Html.DropDownList("SportID", (SelectList)ViewData["SportsSelectList"], "-- Select --", new { @disabled = "disabled", @readonly = "readonly" })%>

<%= Html.CheckBoxFor(model => model.IsActive, new { @disabled = "disabled", @readonly = "readonly" })%>