public DataTable leer()
{
sql = "SELECT "
+ "id_materia,"
+ "nombreM,"
+ "id_profesor"
+ " FROM "
+ "materia";
return(mod.llenarDT(sql));
}
public DataTable leer()
{
sql = "SELECT "
+ "id_profesor,"
+ "nombreP,"
+ "apellidoP"
+ " FROM "
+ "profesor";
return(mod.llenarDT(sql));
}
public DataTable leer()
{
sql = "SELECT "
+ "id_estudiante,"
+ "nombre,"
+ "apellido,"
+ "direccion,"
+ "edad,"
+ "id_materia"
+ " FROM "
+ "estudiante";
return(mod.llenarDT(sql));
}