SqlDbType and Geography

Question

What SqlDbType enumeration should I use when my column is the Geography type? I\'m using MS SQL Server 2008 R2.

This is what I\'m looking for specifically:

Answer 1

When I tried to use SqlDbType.NVarChar I received and error

Failed to convert parameter value from Geography to a String

What resolved this problem for me was to use SqlDbType.Udt

var pgeo = cmd.Parameters.Add("@GeoLocation", SqlDbType.Udt);
pgeo.UdtTypeName = "Geography";

And then later, in a loop, I set the value of the parameter:

var ss = new SqlString(objValue.ToString());
var sc = new SqlChars(ss);
var geocode = SqlGeography.STPointFromText(sc, 4326);
cmd.Parameters["@GeoLocation"].Value = geocode;

Note: this requires Microsoft.SqlServer.Types and System.Data.SqlTypes