Question

I’m trying to convert results from a query into json.

    string esql = "select d.dpr_ts, d.dpr_close from Entities3.dpr_mm as d";//where dpr_qot_id=2029543939 and dpr_ts>='" + start + "' and  dpr_ts<='" + end + "'";
    EntityConnection econn = new EntityConnection("name=Entities3");

    econn.Open();

    EntityCommand ecmd = econn.CreateCommand();
    ecmd.CommandText = esql;
    EntityDataReader ereader = ecmd.ExecuteReader(CommandBehavior.SequentialAccess);
    Console.WriteLine("Entity SQL Result");
    StringBuilder result = new StringBuilder();
    int i = 0;
    while (ereader.Read())
    {
        if (i > 0) result.Append(","); i++;
        result.Append("['" + ereader.GetDateTime(0).ToShortDateString() + "'," + ereader.GetValue(1) + "]");
    }
    ViewBag.ChartData = "[" + result.ToString() + "]";

I want to save it in ViewBag. But the result string looks like : ['10.01.2011',3,9990],['11.01.2011'] (so "'" is converted to '). How can I avoid it?

BTW: Can I generally do this task better?

Answer 1

1. transform the result from sql into an object, even a dynamic object will work.
2. put the object in the ViewBag
3. in the view render the object as JSON using Json.Net

here is an example

controller

var data = GetDataFromDatabaseAndMapToObject();
ViewBag.TheData = data;

return View(model);

view

<script type="text/javascript">
    var json = @Html.Raw(JsonConvert.Serilaized(ViewBag.TheData));
    //use json however you would like.
</script>