How to pass an object to HTML attributes? For example I have the following code:
var attrs = new { id = "myid", style = "color: Red;" };
How to convert attrs to string like this to embed them into an HTML markup:
id="myid" style="color: Red;"
Thanks in advance :)
This functionality is, surprisingly enough, provided by the RouteValueDictionary class:
IDictionary<string, object> htmlAttributes = new RouteValueDictionary(attrs);
You can then use this dictionary in conjunction with a TagBuilder, which you will probably be using anyway:
var tagBuilder = new TagBuilder("input");
tagBuilder.MergeAttributes(htmlAttributes);
tagBuilder.ToString(TagRenderMode.Normal);
You can see this done in the ASP.NET MVC source code itself; one of the simpler examples is in TextAreaExtensions.cs.
EDIT:
In order to properly convert "data_attr" to "data-attr", use the AnonymousObjectToHtmlAttributes static method.
IDictionary<string, object> htmlAttributes = HtmlHelper.AnonymousObjectToHtmlAttributes(attrs);
HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes) which will properly handle data_blah type attributes.You do not need to convert to a string. The last paramater for HTML Helpers is an Object. You just give it the object like you have written above:
For exmample
@Html.TextBoxFor(x => x.Foo, new { size = 10, maxlength = 10 })
@Html.TextAreaFor(x => x.Notes, new { @class = "additionalInfo" })
@Html.TextBoxFor(x=>x.Registration.Address.Postcode, new {type="number", @class="postcode numeric", size=5, maxlength=5})
on a side note you probably should not be setting styles directy inline with your HTML and use a CSS class/selector instead with a seperate style sheet. Also the ID of each DOM element should automatically be set when you use MVC HTML helpers
Here's how to do this conversion :
var htmlAttributes = new { id="myid", @class="myclass" };
string string_htmlAttributes = "";
foreach (PropertyDescriptor property in TypeDescriptor.GetProperties(htmlAttributes))
{
string_htmlAttributes += string.Format("{0}=\"{1}\" ", property.Name.Replace('_', '-'), property.GetValue(htmlAttributes));
}
PropertyDescriptor belong to the class System.ComponentModel
