Send data to SqlCommand

i have an textbox named 'Chapter' that its string must send az parameter
to a 'int' database field. :
sqlCommand->Parameters->Item[S"@Chapter"]->Value=Convert::ToInt32(chapter->Text)
.
an error displayed: "cannot convert from int to __gc* type.
how must i save int type to sql server database

Code:

---

sqlCommand->Parameters->Item[S"@Chapter"]->Value=__box(Convert::ToInt32(chapter->Text));

---