i am working on help desk system in mvc.
i have only one master table for user and technicians.
this is my category class:
public class Category
{
[Key]
public int CategoryId { get; set; }
public string Name { get; set; }
public virtual ICollection<SubCategory> subCategory { get; set; }//category can have more than 1 category
}
This is my Subcategory:
public class SubCategory
{
[Key]
public int SubcategoryId { get; set; }
public string Name { get; set; }
public int CategoryId { get; set; }
public virtual ICollection<TicketInfo> ticketsInfo { get; set; }/to keep track of all tickets under this particular subcategory.
public virtual ICollection<UserDetails> technicianInfo { get; set; }//to keep track of technician and user under this subcategory.
public virtual Category category { get; set; }
}
This is my usermaster(it defines both user and technician)
public class UserDetails
{
public string UserName { get; set; }
[Key]
public int UserId { get; set; }
public string FName { get; set; }
public string LName { get; set; }
public string PhoneNo { get; set; }
public string EmailId { get; set; }
[DataType(DataType.Password)]
public string Password { get; set; }
public int SubcategoryId { get; set; }
public int AddressId { get; set; }
public Boolean IsActive { get; set; }
public DateTime CreatedDate { get; set; }
public virtual ICollection<Role> Roles { get; set; }
public virtual SubCategory subCategory { get; set; }
}
now when i am firing dis query::
public list<Category> FetchTicketDetailsforSubcategory(int categoryId)
{
using (HelpDeskdbContext context = new HelpDeskdbContext())
{
var category = from temp in context.Category where temp.CategoryId == categoryId select temp;
return category;
}
}
it just show me the category but not subcategory under that category.
it show me this on subcategory:The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.
can any one figure out what is wrong with my class design??
try this
context.Category.Where(x=>x.CategoryId == categoryId).SelectMany(x=>x.subCategory).ToList()
Related
I have a complex model with multiple levels, i am using Swashbuckle.
how can I ignore related models in swagger UI? and show just the first level of the model?
See the below example, I want to ignore all relations like JobTitleVM and ICollection.
public class UserVM
{
public int Id { get; set; }
public Guid Guid { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Token { get; set; }
public string Avatar { get; set; }
public int IsActive { get; set; }
public int JobTitleId { get; set; }
public JobTitleVM JobTitle { get; set; }
public int UserStatusId { get; set; }
public UserStatusVM UserStatus { get; set; }
public virtual ICollection<UserStepsVM> UserSteps { get; set; } = new List<UserStepsVM>();
}
I have a requirement that I am not sure how to accomplish, in my existing data I have a list of customers, each customer should be assigned a staffMember to work with them, so would this be a 1 to 1 relationship or a 1 to many relationship, having trouble wrapping my head around how to model the data, as I want to figure out how to model this correctly. Since a staff member can be assigned to many different customers How should I model this? Does this look correct?
What I would like is to have the form pull the list of staff members available from the staff table, when inputting a new customer, ideally by the name
which I figure I could probably do using linq..
public class Customer
{
public int CustomerId { get; set; }
public string Name { get; set; }
public string BusinessName { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public DateTime RequestDate { get; set; }
public Staff Staff { get; set; }
public List<CustomerJob> CustomerJobs { get; set; }
}
public class Staff
{
public int ID { get; set; }
public string Name { get; set; }
public string Phone { get; set; }
public string EMail { get; set; }
public int CustomerId { get; set; }
}
Customer have exactly 1 Staff while a single Staff maybe assigned to more than 1 Customer. So this is a one-to-many relation.
It is better that Customer be aware of its Staff. It could be called AssignedStaff. Staff itslef does not need to have a property to show all its Csutomers. Tough you can extract Customer list of a Staff using a simple query.
My recommended class structure is as follow:
public class Customer
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string BusinessName { get; set; }
public string Phone { get; set; }
public string Email { get; set; }
public DateTime RequestDate { get; set; }
public Staff AssignedStaff { get; set; }
public List<CustomerJob> CustomerJobs { get; set; }
}
public class Staff
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public string Phone { get; set; }
public string EMail { get; set; }
}
A query for extracting Customer list of a Staff:
var customers = _dbContext.Customers.Where(x => x.AssignedStaff.Id == staffId);
I have searched and was unable to find a way to display checkboxes in my view. I have 2 entities: Assignment and Chore which is a one-to-many relationship (one assignment, many chores)
public class Chore
{
public System.Guid ChoreId { get; set; }
public string ChoreName { get; set; }
public string Description { get; set; }
public int PointValue { get; set; }
}
public class Assignment
{
public int AssignmentId { get; set; }
public System.Guid RecipientId { get; set; }
public Nullable<bool> Completed { get; set; }
public System.DateTime AssignedDate { get; set; }
public Nullable<System.DateTime> CompletedDate { get; set; }
public virtual IEnumerable<Chore> Chores { get; set; }
}
How can I display a list of all possible chores That I can select whenever I want to create an assignment?
I'm still new in creating Models using Entity Framework and MVC 4 Razor. I'm having a problem on how can I save a history of a model. How can I create a model that have a history on specific tables or fields ? For ex: If I wish to create a history on the changes on the school. Its still not clear to me how will I I create the model that saves history. How will be the triggering do I have to execute the save function on different models with the same data ?
Thank you so much in advance.
If anyone could be a simple example of model and a model history and how it is functioning, I'll be very grateful. Like a Sales or sales history.
Here's my code
One To Many
public class Child
{
[Key]
public int ChildID { get; set; }
[Required,Display(Name="Project Code")]
public string ProjectCode { get; set; }
public string Status { get; set; }
[DataType(DataType.Date)]
public DateTime StatusDate { get; set; }
public string FamilyName { get; set; }
public string GivenName { get; set; }
public string MiddleName { get; set; }
[DataType(DataType.Date)]
public DateTime Birthdate { get; set; }
public string Gender {get;set;}
public string Address { get; set; }
public string Section { get; set; }
public int SchoolLevelID { get; set; }
public int SchoolYearID { get; set; }
public int AreaID { get; set; }
public int SchoolID { get; set; }
public int GradeLevelID { get; set; }
//Foreign Key - One to Many
public virtual SchoolLevel SchoolLevel { get; set; }
public virtual SchoolYear SchoolYear { get; set; }
public virtual Area Area { get; set; }
public virtual School School { get; set; }
public virtual GradeLevel GradeLevel{get;set;}
//Child is foreign key at the table
public virtual ICollection<Guardian> Guardians { get; set; }
}
public class SchoolLevel
{
public int SchoolLevelID { get; set; }
public string SchoolLevelName { get; set; }
public virtual ICollection<Child> Children { get; set; }
}
public class SchoolYear
{
public int SchoolYearID { get; set; }
public string SchoolYearName { get; set; }
public virtual ICollection<Child> Children{get;set;}
}
public class Area
{
public int AreaID{get;set;}
public string AreaName { get; set; }
public virtual ICollection<Child> Children{get;set;}
}
public class School
{
public int SchoolID { get; set; }
public string SchoolName{get;set;}
public virtual ICollection<Child> Children { get; set; }
}
public class GradeLevel
{
public int GradeLevelID{get;set;}
public string GradeLevelName { get; set; }
public virtual ICollection<Child> Children { get; set; }
}
public class ChildDbContext : DbContext
{
public DbSet<Child> Children { get; set; }
public DbSet<SchoolLevel> SchoolLevels { get; set; }
public DbSet<SchoolYear> SchoolYears { get; set; }
public DbSet<Area> Areas { get; set; }
public DbSet<School> Schools { get; set; }
public DbSet<GradeLevel> GradeLevels { get; set; }
public DbSet<Guardian> Guardians { get; set; }
}
You can use this approach: Create a History model. That contains 1 changeness like o log.
public class History
{
public int HistoryId { get; set; }
public int ModelType { get; set; } //it is ModelTypeEnum value.
public int ModelId { get; set; }
public string PropertyName { get; set; }
public string Propertyvalue {get;set;}
public DateTime ChangeDate { get; set; }
public int ChangedUserId { get; set; }
}
And Enum:
public enum ModelTypeEnum
{
Child =1,
SchoolLevel = 2,
//etc..
};
For example, when you edit 1 Child entity, give changed properties name and value, it's id, type and others (ChangeDate, ChangedUserId) to History and save histories. If 3 properties will change you should save 3 history entities. Then, you can load (filter) histories by ModelId, by ChangedUserId etc.
I'm deploying a Adventure Cycle page where the people can order one of bikes. I want to create a Shipping Information include (Address 1, Address 2, City, Country, Zip/Postal, and State/Province). When click the Submit Order it will redirect to Complete page to inform User that order is successful.
Address model:
public partial class Address
{
public Address()
{
this.SalesOrderHeaders = new HashSet<SalesOrderHeader>();
this.SalesOrderHeaders1 = new HashSet<SalesOrderHeader>();
}
public int AddressID { get; set; }
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
public string City { get; set; }
public Nullable<int> StateProvinceID { get; set; }
public string PostalCode { get; set; }
public System.Guid rowguid { get; set; }
public Nullable<System.DateTime> ModifiedDate { get; set; }
public virtual StateProvince StateProvince { get; set; }
public virtual ICollection<SalesOrderHeader> SalesOrderHeaders { get; set; }
public virtual ICollection<SalesOrderHeader> SalesOrderHeaders1 { get; set; }
}
Sales Order Header:
public partial class SalesOrderHeader
{
public SalesOrderHeader()
{
this.SalesOrderDetails = new HashSet<SalesOrderDetail>();
}
public int SalesOrderID { get; set; }
public byte RevisionNumber { get; set; }
public Nullable<System.DateTime> OrderDate { get; set; }
public Nullable<System.DateTime> DueDate { get; set; }
public Nullable<System.DateTime> ShipDate { get; set; }
public byte Status { get; set; }
public bool OnlineOrderFlag { get; set; }
public string SalesOrderNumber { get; set; }
public string PurchaseOrderNumber { get; set; }
public string AccountNumber { get; set; }
public int CustomerID { get; set; }
public Nullable<int> SalesPersonID { get; set; }
public Nullable<int> TerritoryID { get; set; }
public Nullable<int> BillToAddressID { get; set; }
public Nullable<int> ShipToAddressID { get; set; }
public int ShipMethodID { get; set; }
public Nullable<int> CreditCardID { get; set; }
Hope it will help you,
On your Complete View you must put the model Address to the redirect method of the Complet e form:
Like
`Public ActionResult SubmitOrder(Address address)
{
...
return View("Complete", address);
}
`
and
on your Complete View
first line must be
`
#Model namespace.Model.Address
//then you can use
#model.AddressLine1
#model.AddressLine2
#model.City
#model.PostalCode
#model.StateProvinceID // You will retrieve an Id here I guess but at least you will
//have your data. embedded in your razor code
`