Help in update query in c#, it should look in the same way the insert code mentioned here

int hrd1 = bl.BL_INSERT_HR_UPLOAD(FORM_ID, OFFER_ID, DOJ, NI_NUMBER, EMP_ID);

public int BL_INSERT_HR_UPLOAD(string FORM_ID,string OFFER_ID,string DOJ,string NI_NUMBER,string    EMP_ID)
{
   int hrd1 =dl.DL_INSERT_HR_UPLOAD
   (FORM_ID,OFFER_ID,DOJ,NI_NUMBER,EMP_ID);
   return hrd1;
}

public int DL_INSERT_HR_UPLOAD(string FORM_ID, string OFFER_ID, string DOJ, string NI_NUMBER, string EMP_ID)
{
        con.Close();
        con.Open();
        SqlCommand cmd = new SqlCommand("INSERT_HR_DOCUMENT_UPLOAD", con);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@FORM_ID", FORM_ID);
        cmd.Parameters.AddWithValue("@OFFER_ID", OFFER_ID);
        cmd.Parameters.AddWithValue("@ABSOLUTE_DOJ", DOJ);
        cmd.Parameters.AddWithValue("@NI_NUMBER",NI_NUMBER);
        cmd.Parameters.AddWithValue("@EMPLOYEE_NUMBER", EMP_ID);
      
        return cmd.ExecuteNonQuery();
}