My SQL Insert Spatial data error: Cannot get Geometry object from data you send to the Geometry field

My SQL Insert Spatial data error: Cannot get Geometry object from data you send to the Geometry field

The problem occurs, Baidu, Google after finding a variety of solutions similar, but can not solve the problem, after arduous work to find a solution:

Https://dev.mysql.com/doc/connector-net/en/connector-net-entityframework50.html

Method One: Using Mysqlgeometry () This way, the method of adding polygons has not been found

Test the code, the insertion point data is OK.

Method two uses the Geofromtext database function:

Using the Geofromtext database function, the method needs to start using Geofromtext (Par.value) outside of the parameters, always reporting errors in the header, using Geofromtext (Pram) Normal

My SQL Insert Spatial data error: Cannot get Geometry object from data you send to the Geometry field