CODEWITHSUNDEEP
asp.net-mvcasp.net-mvc-3
Samantha J T Star
Samantha J T Star

Reputation: 32808

Confused about Html.AttributesFor(m => m.Name))

I am trying to learn from the code of others. I saw the following:

@Html.TextBoxFor(m => m.Name, Html.AttributesFor(m => m.Name))

Can someone explain to me how the Html.AttributesFor works? What kind of attributes are these and where can I set them up.

Update:

I found the following hidden in the code:

  public static IDictionary<string, object> AttributesFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression)
        {
            var attributes = new RouteValueDictionary {{"class", ""}};

            WhenEncountering<StringLengthAttribute>(expression, att => attributes["maxlength"] = att.MaximumLength);
            WhenEncountering<HintSizeAttribute>(expression, att =>
                {
                    attributes["class"] += att.Size.ToString().ToLowerInvariant() + " ";
                });

            attributes["class"] = attributes["class"].ToString().Trim();
            return attributes;
        }

Upvotes: 0

Views: 81

Answers (1)

Rafay
Rafay

Reputation: 31043

TextBoxFor helper has three overloads and no one specifies the syntax as you have posted, may be its a custom helper somebody has written for convenience. The second argument of Html.TextBoxFor takes html objectHtmlAttributes which you can specify like 

@Html.TextBoxFor(x=>x.name,new { @class="classname", @rel="nofollow" })

or it takes a IDictionat<string,object>htmlAttributes

Upvotes: 1

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