Question

I am developing an asp.net MVC web app in which I am using Linq to Sql for getting the results from database through jquery and ajax. My model has following code

 public IEnumerable<string> getComments(long problemID)
        {

            var comment = from c in _objectModel.Comments
                          where c.ProblemID == problemID
                          select new { c.EmpID, c.CommentText, c.Time }.ToString();

            return comment;

        }

and my controller has following code

public string GetComments(string problemid)
        {
            List<string> collection =  _discussionRepository.getComments(Convert.ToInt32(problemid)).ToList();
            string comments = null;
            foreach (string item in collection)
            {
                comments += item + "\n";

            }

            return comments; 



        }

and in my view contains

$("#btnPostComment").click(function () {
  var strdata = {
           problemID: $("#problemID").val(),
           commentText: $("#_1").val(),
           empID: $("#empID").val(),
           agree: 0,
           disagree: 0
        };
        $.ajax({
            type: "POST",
            url: "<%= Url.Action("PostComment", "Discussion")  %>",
            data: strdata,
  error: function(msg){
                alert("error" + msg);
            },
            success: function (msg) {
                var id = { problemid :  $("#problemID").val()};
                 $.ajax({
                    type: "GET",
                    url: "<%= Url.Action("GetComments", "Discussion")  %>",
                    data:  id,
                    error: function(msg){
                         alert("error2" + msg);
                    },
                    success: function (msg) {

                        $("#commentdiv").html(msg);
                    }
                    });


            }
        });

and I am getting the following result in my asp page

{ EmpID = 1, CommentText = sss, Time = 1/27/2012 2:20:49 AM } { EmpID = 1, CommentText = aaa, Time = 1/27/2012 2:46:07 AM } { EmpID = 1, CommentText = aaa, Time = 1/27/2012 2:50:23 AM } { EmpID = 1, CommentText = Munazza, Time = 1/27/2012 2:58:29 AM } { EmpID = 1, CommentText = Jawad, Time = 1/27/2012 3:00:51 AM } { EmpID = 1, CommentText = xx, Time = 1/28/2012 11:56:59 AM } { EmpID = 1, CommentText = ss, Time = 1/28/2012 12:35:00 PM }

I want to get the result without braces and without properties i.e 1 ss 1/27/2012

Regards

Answer 1

The problem is that you’re calling ToString on the anonymous type. Does your existing Comment model class contain too much data? If not, you can just use:

public List<Comment> GetComments(long problemID)
{
    return _objectModel.Comments.Where(c => c.ProblemID == problemID)
                                .ToList(); // Force evaluation
}

You’d then change your controller to convert this List<Comment> into AJAX which the Javascript could understand.

If you really only want strings without properties, you could just change your original code to:

public IEnumerable<string> GetComments(long problemID)
{
    var query = from c in _objectModel.Comments
                where c.ProblemID == problemID
                select new { c.EmpID, c.CommentText, c.Time };

    return query.AsEnumerable() // Do the rest locally
                .Select(c => string.Format("{0} {1} {2"}, c.EmpID,
                                           c.CommentText, c.Time));
}

You should also change your controller code to either use String.Join or a StringBuilder – as otherwise you’re going to have an O(n²) problem due to repeated string concatenation…