Getting Child Class Type From Parent Class Parameter In C#

Jul 6, 2010

I am going to have multiple "types" of an object and I am really not sure how best to retrieve/save those multiple types without having a separate save/retrieve for each type.

My classes:

[Code]....

I hope this makes sense. I'd rather not add a "type" column as I have this in another part of my database and I am not really liking it too much

UPDATE

Here's more info/questions for clarification, if necessary.

I'm really at a loss for how to incorporate them into my repository pattern.

When I call getEvaluation, I want it to return an abstract Evaluation, but I'm struggling with this code. Same with Saving - any insight on this would be excellent

UPDATE 2

Database:
Evaluations
Id (PK)
Comment
EvaluationType1
Id (FK to Evaluations.Id)
Field
EvaluationType1
Id (FK to Evaluations.Id)
Field

So, in getEvaluation(int id), I need to figure out what type of Evaluation they want. Does this mean I should pass in a type? Same is true in saveEvaluation, But I can do a switch/function map to see what Type it is.

View 6 Replies


Similar Messages:

Web Forms :: Child Parent Class In Linq

Apr 27, 2016

I want to write the Customer belongs their product

Customer 1  and their details

then products details Purchased by Customer 1

Customer 2  and their details

then products details Purchased by Customer 2

public class Customer {
public int CustID { get; set; }
public string CustName { get; set; }
public string CustEmail { get; set; }
public string CustContact { get; set; }
public string CustAdd { get; set; }

[Code] .....

View 1 Replies

Using Custom Class With Method That Takes Generic Type Parameter

Apr 23, 2010

I have several custom classes that derive from a common base class so they share several members in common. I would like to be able to pass objecs from any of these three classes to a function that will "look at" common properties. However, it seems there is a catch 22 -- When I try to access a member (.FirstName) of the passed object, the computer reports an error that it thinks the member doesn't exist.

It seems to be a sort of contradiction -- since I didn't declare the type, the computer can't confirm existence, but it seems that it should have to take it on faith since the generic character of the type is specified by the code. Possibly there is something I don't know about that would fix this. I'm showing VB code for what I have so far. I went ahead and hardcoded an instance to confirm that the object exists and has the needed property. I commented out the line that had the code that resulted in the computer reporting an error.

[Code]....

View 2 Replies

How To Access Label In Parent Class Of Code Behind Class

May 24, 2010

I have a class (name PageBase) that is inhariting System .Web.UI .Page and all my .aspx page behind classes are inhariting this class. This way I have put some common things in PageBase class.

For showing errors I want to put showMessage funtion in PageBase as well so that I may have not put it in every page and it will easy to manage this way.

Probem is that how PageBase class will access a control which is in aspx page in its child class (child class of PageBase) .

I dont want to pass control as argument to function in parent class, is ther any other way ?

View 7 Replies

C# - Load A Type In Parent-child Website?

May 22, 2010

I am developing a C# VS 2008 / SQL Server 2008 website. Although this same code compiles in the Project version, the website version does not compile. Many of their files are the same so I do not understand even where to look. The only compile error I get is:

Could not load type 'DataMatch'

in my DataMatch.aspx file. Is the problem in my web.config file? How do websites differ from projects in VS? All four of these files reside in same directory.

Default.aspx file:

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Default.aspx.cs"
Inherits="AddFileToSQL" Title="Untitled Page" %>

Default.aspx.cs file:

using System.Data.SqlClient;
using System.Security.Principal;

namespace AddFileToSQL
{
public partial class AddFileToSQL : System.Web.UI.Page
{
...

DataMatch.aspx file:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DataMatch.aspx.cs"
Inherits="DataMatch" %>

DataMatch.aspx.cs file:

using System.Web.UI.WebControls;
using AddFileToSQL;
public partial class DataMatch : AddFileToSQL
{

View 1 Replies

Parent Controller Class In .NET MVC 2?

Jul 26, 2010

I've been working on a rather large web application that requires a specific id param in the url for every page visited (for example, /controller/action/id?AccountId=23235325). This id has to be verified every time someone visits a page. want to reduce code replication as much as possible, and was wondering if there is a way to use an init method or constructor in a controller that inherits the MVC controller, and then have that controller extended by the others.

View 1 Replies

ADO.NET :: Retrieving Parent (POCO) Class In WCF

Jan 11, 2011

I have an interesting problem with a WCF Service I am creating. As background fodder my solultion uses MVC 3 RC2 as the web interface. I am developing the solution as an N-Tier application using the Entity Framework 4.0 with POCO Self Tracking Entities, repository and unit of work approach. I am using the STE's more as an advanced POCO since STE do not seem to play well as of yet in the real world as they were meant to and since they do seem to give me better interfacing with the DB through my layers still. Additionally, I am incorporating WCF into the solution as the backend for the models based on info I am reading and the fact that I will need to also access these services via a windows service app on the client computers.

So, I have a datastore which includes my edm and the repositories. The POCO STEs are generated in a separate layer in what I have called my Domain Models. Within my domain area I also have a Core app holding my utilities. I am currently incorporating an additional domain element as a WCF service using the RESTful template. This WCF will be servicing both my MVC controllers and a Windows Service app on the client computers.

Now, on to the problem: Within this solution I have an Entity Set of People (or Person?). Within that Entity set I have a chain of inherited entities as follows Person->User->StaffMember->Provider where Provider is the resultant child. Within my WCF I have a ProviderService, a StaffMemberService and a UserService. In each of these Services one of my OperationContracts is a Get(string id) amongst others. the Get(String id) contract is the one that is causing me problems. Within that Get(String id) contract I do the following for the User:

[Code]....

and for the Provider:

[Code]....

Now, what has gotten me completely confused is that the Provider one works like a charm. But if I use the UserService to call the User of the same Id (Since User is a base class for Provider, this should work) I get an error saying it was a bad service call. (The ProviderService, as stated works and returns all the correct data). When I debug it, the UserService Get(String id) function actually works as expected up to and through the return statement (ie the user variable actually contains all the proper data that I would expect on the call). It is only after the return that I get the web page giving me that error and points me to the help page for the service. (I am using the browser to view the results at this point only). </P><P>I am assuming it has something to do with serialization? But why is it displaying the derived class with all expected data, which yes does include the data not being displayed as a user data, I am calling the data using the same UserId. I am not expecting someone to inspect my code, but to be a traffic cop and point me in the direction I need to look.

View 12 Replies

C# - Access Parent Class From Custom Attribute?

Jun 6, 2010

Is it possible to access a parent class from within an attribute.

For example I would like to create a DropDownListAttribute which can be applied to a property of a viewmodel class in MVC and then create a drop down list from an editor template. I am following a similar line as Kazi Manzur Rashid here.

He adds the collection of categories into viewdata and retrieves them using the key supplied to the attribute.

I would like to do something like the below,

public ExampleDropDownViewModel {
public IEnumerable<SelectListItem> Categories {get;set;}
[DropDownList("Categories")]
public int CategoryID { get;set; }
}

The attribute takes the name of the property containing the collection to bind to. I can't figure out how to access a property on the parent class of the attribute. Does anyone know how to do this?

View 2 Replies

How To Remove Access To A Method From Parent Class

Feb 25, 2010

Do i remove the ability to call a method from the class my page is inherited from?

I am trying to build my custom Role Provider and certain method i not want to be accessible.

View 2 Replies

MVC :: Redefine Parent's Variables In Partial Class?

Dec 29, 2010

i am using linqtosql dbml to create table classes automatically.

however each time i update my database or dbml diagram, it refreshs designer.cs file and all code i wrote is gone.

so, i decided to make partial class to keep certain information alive.

but here is my question :

for example, User class is defined as follow in designer.cs file :

[Code]....

public string UserID{get;set;}
}

but if i do this, i get error message because UserID is already defined in designer.cs file.

should i delete all UserID variable in designer.cs each time i update the dbml?

i believe there should be a better way to do it

View 1 Replies

Parent Page Class Not Accessible From Custom Control?

Jan 21, 2010

1) I've page class public partial class MyDelivery : System.Web.UI.Page

2) ASCX is in different subfolder public partial class MyControls_Hello_Bye : System.Web.UI.UserControl

I am unable to access #1 parent page class from control

View 2 Replies

JQuery :: Add Css Class To Parent Of Radio Button When Checked?

Jul 29, 2010

I'm trying to add a css class to the parent div of my radio button if it is checked. Then remove if it is not checked. Using onfocus and onblur won't work on radio buttons for some reason. I also want to achieve this without specifying any type of id or name, just by the html control of 'input'.

Here's what I came up with in jquery:

[Code]....

And the html:

[Code]....

View 2 Replies

VS 2012 - Class Needs To Access Application Space In Parent

Sep 19, 2015

I've got a class that create a report in a PDF - looks like this

Code:
Option Explicit On
Imports PdfSharp
Imports PdfSharp.Drawing
Imports PdfSharp.Pdf
Imports System.Data.SqlClient
Public Class acsReportWriter

[Code] ...

And I access this class from within a web service call like this

Code:
Using acsRpt As New ACSReport.acsReportWriter
acsRpt.StartDocument(strViewName, strTitle, username)
Using dcn As New SqlConnection(connStr)
Using cmd As New SqlCommand
cmd.CommandType = CommandType.StoredProcedure

[Code] ....

So - in that web service I can access APPLICATION like this

Code:
With Application
.Lock()
' need to do work here
.UnLock()
End With

I need to be able to access APPLICATION from the acsReportWriter class to put status message every so often so another AJAX POST can fid out how many pages are done.

I'm having a hard time even adding IMPORTS to SYSTEM.WEB in the acsReportWriter class

View 1 Replies

How To Access A Label Form User Control In Parent Class

May 24, 2010

I have a class UserControlBase that inherits System.Web.UI.UserControl and my user controls inherit UserControlBase class. UserControlBase has some common functions that are used in all user controls.

I want to put error display funtion to UserControlBase as well so that I may not have to declare and manage it in all user controls. Error will be displayed in some label in usercontrol. Issue is how to access label which is in usercontrol in UserControlBase in function ?

View 1 Replies

How Does The Child User Control Inherit The Markup From The Base Class

May 25, 2010

I have a user control (uc1) which inherits from uc2. uc2 has a user control (uc3) declared in the markup. I am trying to access uc3 from uc1 but I get NullReferenceException. I thought due to inheritance uc3 would instantiate but looks like I am missing a step.

Clarification:

How does the child user control inherit the markup from the base class? The server controls in the base user control are null in the code behind of the base user control. Why?

View 4 Replies

5 Cascading Dropdowns (Parent To Child And Child To Parent)?

Aug 26, 2010

Simple and blunt: my cascading dropdownlists clear when a postback occurs. Does anyone know a quick way around that?For more information, read on...

I have 5 dropdown lists that define a training class location and line of business: Site, Parent Client, Client, Program, Project I'm trying to build cascading dropdownlists that can work from any direction (i.e. select a site and all other lists are filtered by site...select a project and all other dropdown lists are filtered by project). I've built the SQL Select statement behind the lists that filters (accurately).

View 3 Replies

Base Class Access A Parameter?

Feb 15, 2010

Is it possible for a Controller Base class to access a parameter from an action link and if so how do I access that parameter within my Base Controller?

Action Link:

<%=Url.Action("Area_1419", "Home", new { SectionId = 1})%>

Base Controller Class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Website.Models;
namespace Website.Controllers
{
public abstract class CategoriesController : Controller
{
public CategoriesDataContext _dataContext = new CategoriesDataContext();
public CategoriesDataContext DataContext
{
get { return _dataContext; }
}
public void SectionID()
{
int SectionID = Convert.ToInt32(Request.QueryString["SectionID"]);
ViewData["SectionID"] = SectionID;
}
public CategoriesController2()
{
//ViewData["Categories"] = from m in _dataContext.Categories where m.Area_ID == SectionID select m;
//ViewData["Categories"] = from c in DataContext.Categories select c;
}
}
}

HomeContoller

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Website.Models;
using Website.ActionFilters;
namespace Website.Controllers
{
[HandleError]
public class HomeController : CategoriesController
{
public ActionResult Index()
{
return View();
}
public ActionResult About(int? SectionID)
{
//ViewData["Message"] = SectionID;
return View();
}
public ActionResult Area_1419(int SectionID)
{
return View();
}
public ActionResult Admin()
{
return View();
}
}
}

View 2 Replies

ADO.NET :: Unable To Pass Parameter To A Business Class

Oct 22, 2010

I am getting this error

Must declare the scalar variable "@InvoiceNumber". in the following code, although i declared InvoiceNumber as a parameter in the Datasource object.

public class GetDetails
{
public static DataSet Details(string InvoiceNumber)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

[Code]....

View 2 Replies

MVC :: Is Model A Entity Class Type

Feb 12, 2010

I have some questions in my mind after went through the video tutorials.

Is Model a entity class type? encapulated attribute and methods (business logic). because i see in videos , people use LINQ to generate models which can only use LINQ to modify/insert/delete data.

Is it a good practice to generate Model using LINQ?

View 3 Replies

Configuration :: BC30002: Type 'class' Is Not Defined?

Dec 23, 2010

I have this very simple project,which consists ( Default.aspx , Class1.vb and web.config ) ....see the picWhen i press Debugging button ... it just worked fine.When I tried to upload it online or run it on iis localhost server, I face this problem.

View 6 Replies

State Management :: Session Or Request In Class Without Passing As Parameter

Sep 3, 2010

I'd like to be able to reference the asp.net objects Session, Request, from a procedure without passing them in as parameters all the time. Is there a way to do this. For example, now I have

[Code]....

I'd like to call it like this "ContextPT.GetSession()" and have GetSession know how to find the Session object. I know this does not seem like a big deal in this case, but I have reasons.

View 1 Replies

C# - How To Access A Private Data Members Of Base Class In The Derived Class

Aug 20, 2010

Since we can access the private data member of base class in the derived class with the help of friend function. How can we do the same in C# asp.net? I mean whats the alternative of friend function in C# asp.net

View 2 Replies

C# - Webservice Complex Types And Class Inheritance - Use The Properties Of The Base Class?

Mar 13, 2010

Using the following Webservice definition using aClientArgs as a complex type:

[System.Web.Script.Services.ScriptService]
public class Controller : System.Web.Services.WebService {
[WebMethod]
public void save_client(aClientArgs client)
{
// Save client data
}
}
Then defining aClientArgs as a sub-class:
public class aArgs
{
public string id = null;
public string name = null;
}
public class aClientArgs : aArgs
{
public string address = null;
public string website = null;
}
Returns the following WSDL fragment for the save_client args:
<save_client xmlns="http://tempuri.org/">
<client>
<address>string</address>
<website>string</website>
</client>
</save_client>
When I'm expecting the following:
<save_client xmlns="http://tempuri.org/">
<client>
<id>string</id>
<name>string</name>
<address>string</address>
<website>string</website>
</client>
</save_client>

So it appears that the .NET WebService is not treating inherited properties as arguments/variables for purposes of a web service. How do I get .NET to also use the properties of the base class?

View 1 Replies

Configuration :: Output Type Of Class Library Cannot Be Started?

Jul 8, 2010

I copied an entire project:

[Code]....

from one computer running Visual Studio 2008 to another computer running Visual Studio 2008.

I can rebuild/build the solution just fine on the new computer, but, if I select 'start debugging', it goes through the compile/build process and then ultimately pops up a window that says:

"A project with an Output Type of Class Library cannot be started directly.

In order to debug this project, add an executable to this solution which references the library project. Set the executable project as the startup project."

NOTE: the 'start debugging' runs fine on the older computer..

View 2 Replies

Architecture :: Accessing A Different Class Depending On The Database Type?

Mar 25, 2010

I need to make a webservice in .net (I know how this works) but then I need to get data out of a database. But my company wants to make it in a way that you can use the system with multiple databases.

So my option was make multiple abstract classes which contains the folowing code (depending on the database type, this would be a SQL database)

public abstract class AbstractDAO<T, Tid>

View 5 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved