private void GMapControl1_OnMarkerEnter(GMapMarker item)
{
if (!_isMouseDown)
{
_currentMarker = item as GMapMarkerImage;
_currentMarker.Selected = true;
}
}
private void GMapControl1_OnMarkerLeave(GMapMarker item)
{
if (!_isMouseDown && _currentMarker != null)
{
_currentMarker.Selected = false;
_currentMarker = null;
gMapControl1.Refresh();
}
}
private void GMapControl1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
_isMouseDown = true;
}
if (e.Button == MouseButtons.Right)
{
var marker = new GMapMarkerImage(gMapControl1.FromLocalToLatLng(e.X, e.Y));
AddMarketToDb(marker);
_markers.Markers.Add(marker);
}
}
private void UpdateMarker(GMapMarkerImage marker)
{
using (SqlConnection myConnection = new SqlConnection(Properties.Settings.Default.ConnectionString))
{
myConnection.Open();
using (SqlCommand myCommand = new SqlCommand("UPDATE Markers SET Lat=@lat, Lng=@Lng WHERE ID = @Id", myConnection))
{
myCommand.Parameters.AddWithValue("@Id", marker.Tag);
myCommand.Parameters.AddWithValue("@Lat", marker.Position.Lat);
myCommand.Parameters.AddWithValue("@Lng", marker.Position.Lng);
myCommand.ExecuteNonQuery();
}
}
}
private void AddMarketToDb(GMapMarkerImage marker)
{
using (SqlConnection myConnection = new SqlConnection(Properties.Settings.Default.ConnectionString))
{
myConnection.Open();
using (SqlCommand myCommand = new SqlCommand("INSERT INTO Markers(Lat, Lng) VALUES(@Lat, @Lng); SELECT SCOPE_IDENTITY()", myConnection))
{
myCommand.Parameters.AddWithValue("@Lat", marker.Position.Lat);
myCommand.Parameters.AddWithValue("@Lng", marker.Position.Lng);
var id = Convert.ToInt32(myCommand.ExecuteScalar());
marker.Tag = id;
}
}
}
private void LoadMarkers()
{
using (SqlConnection myConnection = new SqlConnection(Properties.Settings.Default.ConnectionString))
{
myConnection.Open();
using (SqlCommand myCommand = new SqlCommand("SELECT Id, Lng, Lat FROM Markers", myConnection))
{
SqlDataReader dataReader = myCommand.ExecuteReader();
while (dataReader.Read())
{
var marker = new GMapMarkerImage(
new PointLatLng(
Convert.ToDouble(dataReader["Lat"]),
Convert.ToDouble(dataReader["Lng"])));
marker.Tag = Convert.ToInt32(dataReader["Id"]);
_markers.Markers.Add(marker);
}
}
}
}