Add jQuery to Office365 Solutions

Becuase of the restrictions on Sharepoint 2010 Sandboxed solutions it's essential to be able to write functional code client side, as you are very restricted on what you can do on the server.

Writing Javascript can be extremely labourious without the assistance of some helper libraries like jQuery, and adding javascript links and code is even a challenge in a sandboxed solution.

Here's a cool way of adding jQuery code to Office365 or Sharepoint Online sandboxed solutions.

protected override void RenderContents(HtmlTextWriter writer)
        {
            StringBuilder js = new StringBuilder();

            js.AppendLine("$(document).ready(function(){");
            js.AppendLine(" alert('hello world!');");
            js.AppendLine("});");

            base.RenderContents(writer);

            writer.AddAttribute(HtmlTextWriterAttribute.Type, "text/javascript");
            writer.AddAttribute(HtmlTextWriterAttribute.Src, "//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js");
            writer.RenderBeginTag(HtmlTextWriterTag.Script);
            writer.RenderEndTag();

            writer.AddAttribute(HtmlTextWriterAttribute.Type, "text/javascript");
            writer.RenderBeginTag(HtmlTextWriterTag.Script);
            writer.WriteLine(js.ToString());
            writer.RenderEndTag();           
        }