/// <summary>
/// Lists the questions via Ajax
/// </summary>
/// <param name="prefix">Prefix of the question's title which we look for in tags</param>
/// <returns></returns>
public ActionResult FindQuestion(string prefix)
{
Regex rgx = new Regex("[^a-zA-Z0-9 -]");
//Remove the characters which can't included in the tags
prefix = rgx.Replace(prefix, "");
//Get the wordlist
var wordlist = prefix.Split(' ');
List <Question> quesList = null;
foreach (var item in wordlist)
{
if (quesList != null)
{
var temp = QuestionManager.AllQuestionToTag(item);
if (temp != null)
{
quesList = quesList.Concat(temp).ToList();
}
}
else
{
quesList = QuestionManager.AllQuestionToTag(item);
}
}
//Remove the duplications from the questions
List <Question> questions = null;
if (quesList != null)
{
questions = quesList.GroupBy(q => q.Id).Select(g => g.First()).ToList();
}
//Create a KeyValue list
var allQues = new List <KeyValuePair <int, string> >();
if (questions != null)
{
foreach (var item in questions)
{
allQues.Add(new KeyValuePair <int, string>(item.Id, item.Title));
}
var result = (from l in allQues select l).ToList();
result = (from l in allQues
orderby l.Value
select l).ToList();
return(Json(result, JsonRequestBehavior.AllowGet));
}
else
{
return(null);
}
}
