Creating a Control From its Markup Representation

   1: public static T CreateControlFromMarkup<T>(String markup) where T: Control

   2: {

   3:     StringBuilder builder = new StringBuilder();

   4:     TemplateControl page = HttpContext.Current.Handler as TemplateControl;

   5:     Int32 start = markup.IndexOf('<');

   6:     Int32 end = markup.IndexOf(':', start);

   7:     String tagPrefix = markup.Substring(start + 1, end - start - 1);

   8:  

   9:     foreach (String @namespace in typeof(T).Assembly.GetExportedTypes().Select(x => x.Namespace).OrderBy(x => x).Distinct())

  10:     {

  11:         builder.AppendFormat("<%@ Register Assembly=\"{0}\" Namespace=\"{1}\" TagPrefix=\"{2}\" %>\n", typeof(T).Assembly.FullName, @namespace, tagPrefix);

  12:     }

  13:  

  14:     builder.Append(markup);

  15:  

  16:     Control parentControl = page.ParseControl(builder.ToString());

  17:     T control = parentControl.Controls[0] as T;

  18:  

  19:     return (control);

  20: }