public ActionResult GetAds( AdRequest adRequest )
{
string connectionString = ConfigurationManager.AppSettings["ConnectionString"];
NpgsqlConnection conn = new NpgsqlConnection(connectionString);
// DataReader to read database record.
NpgsqlDataReader reader = null;
string pointToGeography = string.Format(@"ST_GeomFromText('POINT({0} {1})', 4326)::geography", adRequest.Lon, adRequest.Lat);
NpgsqlCommand command = new NpgsqlCommand(string.Format(@"SELECT * FROM ads WHERE ST_DWithin( the_geog, {0}, radius)", pointToGeography));
command.Connection = conn;
try
{
conn.Open();
reader = command.ExecuteReader();
List<AdRequestInfo> adRequestInfoList = new List<AdRequestInfo>();
while (reader.Read())
{
adRequestInfoList.Add(new AdRequestInfo()
{
Name = reader.GetString(reader.GetOrdinal("name")),
Description = reader.GetString(reader.GetOrdinal("description"))
});
}
reader.Close();
if (adRequestInfoList.Count > 0)
{
var jsonSerializer = new JavaScriptSerializer();
var json = jsonSerializer.Serialize(adRequestInfoList);
return new WebResult(json);
}
}
catch (NpgsqlException e)
{
return new WebResult(new ResultInfo() { GreatSuccess = false, Message = e.Message });
}
finally
{
conn.Close();
}
return new WebResult(new ResultInfo() { GreatSuccess = false });
}
public override object BindForModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var request = controllerContext.HttpContext.Request;
StreamReader r = new StreamReader(request.InputStream);
string s = r.ReadToEnd();
var queryParams = HttpUtility.ParseQueryString(s);
AdRequest a = new AdRequest();
a.Lat = float.Parse(queryParams["lat"]);
a.Lon = float.Parse(queryParams["lon"]);
return a;
}