c# - 参数化更新查询语法错误

Question

我正在尝试使用以下代码更新数据库中的数据，但它给了我语法错误，我在这里犯了什么错误

public bool UpdateDrMaster(string title, string FirstName, string Mname, string lastName, string regNo, string speciality, string contactNo1, string contactNo2, string city, string addrss, string pincode, string emailId, string fee_unit, string fee, string DrType, bool displayType)
        {
            bool flag = false;
            try
            {
                string sql = "UPDATE Doctor_Master SET [Title]=@Title,[FirstName]=@FirstName,[MiddleName]=@MiddleName,[LastName]=@LastName,[RegistrationNo]=@RegistrationNo,[Speciality]=@Speciality,[ContactNo_1]=@ContactNo_1,[ContactNo_2]=@ContactNo_2,[City]=@City,[Address]=@Address,[Pincode]=@Pincode,[Email_ID]=@Email_ID,[Fee_Unit]=@Fee_Unit,[Fee]=@,[Type_of_Dr]=@Type_of_Dr,[Display]=@Display,[Hide_Date])";

                cmd = new OleDbCommand(sql, acccon);
                 cmd.Parameters.Add("@Title", title);
                             cmd.Parameters.Add("@FirstName", FirstName);
                             cmd.Parameters.Add("@MiddleName", Mname);
                             cmd.Parameters.Add("@LastName", lastName);
                             cmd.Parameters.Add("@RegistrationNo", regNo);
                             cmd.Parameters.Add("@Speciality", speciality);
                             cmd.Parameters.Add("@ContactNo_1", contactNo1);
                             cmd.Parameters.Add("@ContactNo_2", contactNo2);
                             cmd.Parameters.Add("@City", city);
                             cmd.Parameters.Add("@Address", addrss);
                             cmd.Parameters.Add("@Pincode", pincode);
                             cmd.Parameters.Add("@Email_ID", emailId);
                             cmd.Parameters.Add("@Fee_Unit", fee_unit);
                             cmd.Parameters.Add("@Fee", fee);
                             cmd.Parameters.Add("@Type_of_Dr", DrType);
                             cmd.Parameters.Add("@Display", displayType);
                             cmd.Parameters.Add("@Hide_Date", System.DateTime.Now.ToShortDateString());                            
                cmd.ExecuteNonQuery();
                flag = true;
            }
            catch (Exception err)
            {
                MessageBox.Show(err.Message.ToString());
            }
            return flag;
        }

Answer 1

你有无效的参数：

,[费用]=@

和

,[隐藏日期])

hide_date 后面的右括号也可能是错误的？

            UPDATE Doctor_Master SET [Title]=@Title
        ,[FirstName]=@FirstName
        ,[MiddleName]=@MiddleName
        ,[LastName]=@LastName
        ,[RegistrationNo]=@RegistrationNo
        ,[Speciality]=@Speciality
        ,[ContactNo_1]=@ContactNo_1
        ,[ContactNo_2]=@ContactNo_2
        ,[City]=@City
        ,[Address]=@Address
        ,[Pincode]=@Pincode
        ,[Email_ID]=@Email_ID
        ,[Fee_Unit]=@Fee_Unit
        ,[Fee]=@
        ,[Type_of_Dr]=@Type_of_Dr
        ,[Display]=@Display
        ,[Hide_Date])";