调用方法时编译错误“有一些无效的参数”

Question

我正在c＃中编写一个web服务，我在其中反序列化对象并使用Entity Frame工作保存在DB中。我正在调用方法GetFormData（refNo，form6a，ref form6aEntity，ref form6aDocs），其中form6a是反序列化对象，而from6a实体是实体框架生成的类。这个metod只是将数据从form6对象映射到form6aEntity对象。

   if (new ECI.Handler.Form6aHandler().GetFormData(refNo, form6a, ref form6aEntity, ref form6aDocs))
                {
                  //  stateCode = form6aEntity.ST_CODE;
                  //  acNo = Convert.ToInt32(form6aEntity.AC_NO);
                    stateCode = form6aEntity.ST_CODE;
                    dbIps = new DBO().GetDbMap(stateCode);

                    foreach (string dbip in dbIps.Keys)
                    {
                        fornDbIp = dbip;
                    }
                    foreach (string aip in dbIps.Values)
                    {
                        attachmentDbIP = aip;
                    }
                    connectionString.Add("Forms", string.Format(ConfigurationSettings.AppSettings["NERMSConnString"].ToString(), fornDbIp, "All"));
                    connectionString.Add("Attachments", string.Format(ConfigurationSettings.AppSettings["NERMS_AttachmentConnString"].ToString(), attachmentDbIP, "All"));
                    formSaveStatus = new DBO().UpdateForm6A(form6aEntity, form6aDocs, connectionString);
                }
            }

方法定义类似于

public bool GetFormData(string formRefNo, Form6A formData, ref DBMLs.Form6a formEntity, ref ECI.DBMLs.Form6a_attachment formDocs)
    {
        bool status = false;
        try
        {
            formDocs.AC_NO = Convert.ToInt32(formData.header.constituency_no);

            formData.attachment.applicant_passport = formData.attachment.applicant_passport.Replace("data:image/jpeg;base64,", string.Empty);
            formDocs.applicant_passport = Convert.FromBase64String(formData.attachment.applicant_passport);

            formData.attachment.applicant_photo = formData.attachment.applicant_photo.Replace("data:image/jpeg;base64,", string.Empty);
            formDocs.applicant_photo = Convert.FromBase64String(formData.attachment.applicant_photo);
            formDocs.REF_NO = formRefNo;
            formDocs.ST_CODE = formData.header.state_code;

            if (!string.IsNullOrWhiteSpace(formData.absent.since))
            formEntity.ABSENT_DATE = DateTime.ParseExact(formData.absent.since, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

            //formEntity.ABSENT_DATE = formData.absent.since.ToNullable<DateTime>();
            formEntity.ABSENT_REASON = formData.absent.reason;
            formEntity.AC_NO = Convert.ToInt32(formData.header.constituency_no);


            formEntity.APPLICANT_DATE = DateTime.ParseExact(formData.declaration.applicant_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

            //formEntity.APPLICANT_DATE = formData.declaration.applicant_date.ToNullable<DateTime>();
            formEntity.APPLICANT_PLACE = formData.declaration.applicant_place;
            formEntity.BIRTH_DISRTICT = formData.elector.birth_district;
            formEntity.BIRTH_PLACE = formData.elector.birth_place;
            formEntity.BIRTH_STATE = formData.elector.birth_state;
            formEntity.BIRTH_VILLAGE = formData.elector.birth_village;
            formEntity.DISTRICT_CODE = Convert.ToInt32(formData.address.district);

            if (!string.IsNullOrWhiteSpace(formData.elector.dob))
            formEntity.DOB = DateTime.ParseExact(formData.elector.dob, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

            //formEntity.DOB = Convert.ToDateTime(formData.elector.dob);
            formEntity.EMAIL_ID = formData.declaration.email_id;
            formEntity.FNAME_EN = formData.elector.name;
            formEntity.FNAME_V1 = formData.elector.name_v;
            formEntity.GENDER = formData.elector.gender;
            formEntity.HOUSE_NO = formData.address.house_no;
            formEntity.LNAME_EN = formData.elector.lname;
            formEntity.LNAME_V1 = formData.elector.lname_v;
            formEntity.MNAME_EN = formData.elector.mname;
            formEntity.MNAME_V1 = formData.elector.mname_v;
            formEntity.MOBILE_NO = formData.declaration.mobile_no;
            formEntity.O_ADDRESS_ABROAD = formData.abroad_add.official;

            if (!string.IsNullOrWhiteSpace(formData.passport.expiry_date))
            formEntity.PASSPORT_EXPIRY_DATE = DateTime.ParseExact(formData.passport.expiry_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

            //formEntity.PASSPORT_EXPIRY_DATE = formData.passport.expiry_date.ToNullable<DateTime>();

            if (!string.IsNullOrWhiteSpace(formData.passport.issue_date))
            formEntity.PASSPORT_ISSUE_DATE = DateTime.ParseExact(formData.passport.issue_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

            //formEntity.PASSPORT_ISSUE_DATE = formData.passport.issue_date.ToNullable<DateTime>();
            formEntity.PASSPORT_ISSUE_PLACE = formData.passport.issue_place;
            formEntity.PASSPORT_NO = formData.passport.no;
            formEntity.PIN_CODE = Convert.ToDecimal(formData.address.pincode);
            formEntity.POST_OFFICE = formData.address.postoffice;
            formEntity.PREV_AC_NAME = formData.prev_epic.constituency;
            //formEntity.PREV_EPIC_EXISTS = Convert.ToBoolean(formData.prev_epic.exists);

            formEntity.PREV_EPIC_EXISTS = formData.prev_epic.exists == "1" ? true : false;

            if (!string.IsNullOrWhiteSpace(formData.prev_epic.issue_date))
            formEntity.PREV_EPIC_ISSUE_DATE = DateTime.ParseExact(formData.prev_epic.issue_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

           // formEntity.PREV_EPIC_ISSUE_DATE = formData.prev_epic.issue_date.ToNullable<DateTime>();
            formEntity.PREV_EPIC_NO = formData.prev_epic.no;
            formEntity.PREV_PLACE = formData.prev_epic.place;
            formEntity.PREV_STATE = formData.prev_epic.state;
            formEntity.R_ADDRESS_ABROAD = formData.abroad_add.residential;
            formEntity.REF_NO = formRefNo;
            formEntity.RLN_FNAME_EN = formData.relative.name;
            formEntity.RLN_FNAME_V1 = formData.relative.name_v;
            formEntity.RLN_LNAME_EN = formData.relative.lname;
            formEntity.RLN_LNAME_V1 = formData.relative.lname_v;
            formEntity.RLN_MNAME_EN = formData.relative.mname;
            formEntity.RLN_MNAME_V1 = formData.relative.mname_v;
            formEntity.RLN_TYPE = formData.relative.type;
            formEntity.ST_CODE = formData.header.state_code;
            formEntity.STREET_AREA = formData.address.street;
            formEntity.TEHSIL = formData.address.tehsil;
            formEntity.VILLAGE = formData.address.town;

            if (!string.IsNullOrWhiteSpace(formData.visa.expiry_date))
            formEntity.VISA_EXPIRY_DATE = DateTime.ParseExact(formData.visa.expiry_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);

            //formEntity.VISA_EXPIRY_DATE = formData.visa.expiry_date.ToNullable<DateTime>();

            if (!string.IsNullOrWhiteSpace(formData.visa.issue_date))
            formEntity.VISA_ISSUE_DATE = DateTime.ParseExact(formData.visa.issue_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);
            //formEntity.VISA_ISSUE_DATE = formData.visa.issue_date.ToNullable<DateTime>();
            formEntity.VISA_ISSUE_PLACE = formData.visa.issue_place;
            formEntity.VISA_ISSUING_AUTHORITY = formData.visa.issuing_authority;
            formEntity.VISA_NO = formData.visa.no;
            formEntity.VISA_TYPE = formData.visa.type;

            formEntity.FORM_SUBMISSION_DATE = DateTime.ParseExact(formData.declaration.applicant_date, "dd-mm-yyyy",
    System.Globalization.CultureInfo.InvariantCulture);


            status = true;
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            status = false;                
        }
        return status;
    }
}

编译时，我收到以下错误：

编译器错误消息：CS1502：'ECI.Handler.Form6aHandler.GetFormData（字符串，ECI.Forms.Form6a.Form6A，参考ECI.DBMLs.Form6a，参考ECI.DBMLs.Form6a_attachment）的最佳重载方法匹配）'有一些无效的论点 Screen shot of error

参数Form6a：

public class Form6A
{
    public Form6A() {
        this.header = new Header();
        this.elector = new Elector();
        this.relative = new Relative();
        this.address = new Address();
        this.passport = new Passport();
        this.visa = new Visa();
        this.absent = new Absent();
        this.abroad_add = new AbroadAdd();
        this.prev_epic = new PrevEpic();
        this.declaration = new Declaration();
        this.attachment = new Attachment();
    }

    public Header header { get; set; }
    public Elector elector { get; set; }
    public Relative relative { get; set; }
    public Address address { get; set; }
    public Passport passport { get; set; }
    public Visa visa { get; set; }
    public Absent absent { get; set; }
    public AbroadAdd abroad_add { get; set; }
    public PrevEpic prev_epic { get; set; }
    public Declaration declaration { get; set; }
    public Attachment attachment { get; set; }
    public override string ToString()
    {
        StringBuilder s = new StringBuilder();
        s.Append(this.header.ToString() + ",");
        s.Append(this.elector.ToString() + ",");
        s.Append(this.relative.ToString() + ",");
        s.Append(this.address.ToString() + ",");
        s.Append(this.passport.ToString() + ",");
        s.Append(this.visa.ToString() + ",");
        s.Append(this.absent.ToString() + ",");
        s.Append(this.abroad_add.ToString() + ",");
        s.Append(this.prev_epic.ToString() + ",");
        s.Append(this.declaration.ToString() + ",");
        s.Append(this.attachment.ToString());
        return s.ToString();
    }
}

表单实体

[global::System.Data.Linq.Mapping.TableAttribute(Name="dbo.Form6a")]
public partial class Form6a : INotifyPropertyChanging, INotifyPropertyChanged
{

    private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);

    private string _REF_NO;

    private string _ST_CODE;

    private int _AC_NO;

    private System.Nullable<int> _PART_NO;

    private string _FNAME_EN;

    private string _FNAME_V1;

    private string _FNAME_V2;

    private string _FNAME_V3;

    private string _FNAME_V4;

    private string _MNAME_EN;

    private string _MNAME_V1;

    private string _MNAME_V2;

    private string _MNAME_V3;

    private string _MNAME_V4;

    private string _LNAME_EN;

    private string _LNAME_V1;

    private string _LNAME_V2;

    private string _LNAME_V3;

    private string _LNAME_V4;

    private System.Nullable<System.DateTime> _DOB;

    private string _GENDER;

    private string _BIRTH_PLACE;

    private string _BIRTH_VILLAGE;

    private string _BIRTH_DISRTICT;

    private string _BIRTH_STATE;

    private string _RLN_TYPE;

    private string _RLN_FNAME_EN;

    private string _RLN_FNAME_V1;

    private string _RLN_FNAME_V2;

    private string _RLN_FNAME_V3;

    private string _RLN_FNAME_V4;

    private string _RLN_MNAME_EN;

    private string _RLN_MNAME_V1;

    private string _RLN_MNAME_V2;

    private string _RLN_MNAME_V3;

    private string _RLN_MNAME_V4;

    private string _RLN_LNAME_EN;

    private string _RLN_LNAME_V1;

    private string _RLN_LNAME_V2;

    private string _RLN_LNAME_V3;

    private string _RLN_LNAME_V4;

    private string _SECTION_NO;

    private string _HOUSE_NO;

    private string _STREET_AREA;

    private string _VILLAGE;

    private string _POST_OFFICE;

    private System.Nullable<decimal> _PIN_CODE;

    private string _TEHSIL;

    private System.Nullable<int> _DISTRICT_CODE;

    private System.Nullable<bool> _PREV_EPIC_EXISTS;

    private string _PREV_EPIC_NO;

    private string _PREV_STATE;

    private string _PREV_AC_NAME;

    private string _PREV_PLACE;

    private System.Nullable<System.DateTime> _PREV_EPIC_ISSUE_DATE;

    private string _APPLICANT_PLACE;

    private System.Nullable<System.DateTime> _APPLICANT_DATE;

    private string _MOBILE_NO;

    private string _EMAIL_ID;

    private string _PASSPORT_NO;

    private string _PASSPORT_ISSUE_PLACE;

    private System.Nullable<System.DateTime> _PASSPORT_ISSUE_DATE;

    private System.Nullable<System.DateTime> _PASSPORT_EXPIRY_DATE;

    private string _VISA_NO;

    private string _VISA_TYPE;

    private System.Nullable<System.DateTime> _VISA_ISSUE_DATE;

    private string _VISA_ISSUE_PLACE;

    private System.Nullable<System.DateTime> _VISA_EXPIRY_DATE;

    private string _VISA_ISSUING_AUTHORITY;

    private string _ABSENT_REASON;

    private System.Nullable<System.DateTime> _ABSENT_DATE;

    private string _R_ADDRESS_ABROAD;

    private string _O_ADDRESS_ABROAD;

    private System.Nullable<System.DateTime> _FORM_SUBMISSION_DATE;

    private System.Nullable<bool> _IS_OFFLINE;

    private System.Data.Linq.Binary _APPLICANT_PHOTO;

    private System.Nullable<bool> _IS_SUBMITTED_TO_STATE;

    private System.Nullable<int> _RETRIAL_COUNT;

    private string _HOUSE_NO_V1;}

Form6Docs

public partial class Form6_attachment : INotifyPropertyChanging, INotifyPropertyChanged
{

    private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);

    private long _ID;

    private string _REF_NO;

    private string _ST_CODE;

    private int _AC_NO;

    private System.Data.Linq.Binary _applicant_photo;

    private System.Data.Linq.Binary _dob_proof;

    private System.Data.Linq.Binary _residence_proof;}