Using htmlAttributes for inserting an additional class to my link on my helper

Question

I have a custom html helper:

public static MvcHtmlString MyLink(this HtmlHelper htmlHelper, string linkText, object htmlAttributes)
{
     TagBuilder builder = new TagBuilder("a");
     builder.SetInnerText(linkText);
     builder.AddCssClass("dialogLink");
     return new MvcHtmlString(builder.ToString());
}

Sometimes I would like to add some html attributes to this anchor. For example, I would like to add an additional class to this link. I try this:

public static MvcHtmlString MyLink(this HtmlHelper htmlHelper, string linkText, object htmlAttributes)
{
     TagBuilder builder = new TagBuilder("a");
     builder.SetInnerText(linkText);
     builder.AddCssClass("dialogLink");

     if (htmlAttributes != null)
         builder.MergeAttributes(new RouteValueDictionary(htmlAttributes));

     return new MvcHtmlString(builder.ToString());
}

But it doesn't work because the class already exist (dialoglink).

How can I proceed to be able to add more css to my link with htmlAttributes?

Thanks

Darin Dimitrov · Accepted Answer · 2012-03-01 18:38:57Z

4

You should add the dialogLink class after merging the attributes to avoid overriding it:

public static IHtmlString MyLink(this HtmlHelper htmlHelper, string linkText, object htmlAttributes)
{
    var builder = new TagBuilder("a");
    builder.SetInnerText(linkText);
    if (htmlAttributes != null)
    {
        builder.MergeAttributes(new RouteValueDictionary(htmlAttributes));
    }
    builder.AddCssClass("dialogLink");
    return new HtmlString(builder.ToString());
}

answered Mar 1, 2012 at 18:38

Darin Dimitrov

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Comments

Alexey Antonenko · Accepted Answer · 2013-05-23 08:14:37Z

0

Also you can use

if (htmlAttributes != null) 
builder.MergeAttributes(new RouteValueDictionary(htmlAttributes), true);

link to msdn

public void MergeAttribute(
    string key,
    string value,
    bool replaceExisting
)

answered May 23, 2013 at 8:14

Alexey Antonenko

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