Insert label value in table

There is dropdown in abc page and values

323r

244f

 

and there is button and table

 

TID TTID

1    323r

2    244f

 

so when i select value from dropdown and click on button then value is save in table

 

and after this there is def page

in that there is label i save dropdown selected value in label  

 

there is another table 2

 

in that

 

id TTID value3

1  323r  234

2  323r  456

 

so i want when i click on button which is def page want to save label value  in TTID column in table 2

for this i try this in linq

 

 and this show an error

System.Data.Entity.Validation.DbEntityValidationException: Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

 

 

i want to do this through jquery

i  try this

 

 but this is also not working