Parameter Problem in OleDB

I have the following code that derives the value from a query string -
// the code ->

protected void Page_Load(object sender, EventArgs e)

{

string theTime = Request.QueryString["time"];

string altitude = Request.QueryString["altitude"];

string latitude = Request.QueryString["latitude"];

string longitude = Request.QueryString["longitude"];

lblTtime.Text = theTime;

lblAltitude.Text = altitude;

lblLatitude.Text = latitude;

lblLongitude.Text = longitude;

if (theTime == "" || altitude == "" || latitude == "" || longitude == "")

{

// do nothing

}

else

{

string conn =
ConfigurationManager.AppSettings["ConnectionString"].ToString();

// lblConn.Text = conn;

string selectSQL = "update gps_table set ";

selectSQL += "gps_time= @gps_time,";

selectSQL +="gps_altitude = @gps_altitude,";

selectSQL +="gps_latitude = @gps_latitude,";

selectSQL +="gps_longitude = @gps_longitude where gps_id=1";

OleDbConnection MyConnection = new OleDbConnection(conn);

OleDbCommand MyCommand = new OleDbCommand(selectSQL, MyConnection);

MyCommand.Parameters.Add(new OleDbParameter("@gps_time",
Convert.ToDateTime(theTime)));

MyCommand.Parameters.Add(new OleDbParameter("@gps_altitude",
Convert.ToDouble(altitude)));

MyCommand.Parameters.Add(new OleDbParameter("@gps_latitude", latitude));

MyCommand.Parameters.Add(new OleDbParameter("@gps_longitude", longitude));

MyConnection.Open();

MyCommand.ExecuteNonQuery();

}

I am getting the exception : Parameter @gps_latitude has no default value.



Why? How I can I solve this problem? Is this a VS2005 bug?


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