DataSource Controls :: Access Layer - Northwind Tutorial - Unable To Find The NorthwindTableAdapters.ProductsTableAdapter Class
Mar 31, 2010
I've been attempting to walk through the "Creating a Data Access Layer" tutorial found [URL] I create the DB connection, create the typed dataset and table adapter, specify the sql, etc. When I add the code to the presentation layer (in this case a page called AllProducts.aspx) I am unable to find the NorthwindTableAdapters.ProductsTableAdapter class. I tried to import the NorthwindTableAdapters namespace, but it is not showing up. Looking in the solution explorer Class View confirms that there is a Northwind class, but not the namespace I'm l ooking for. I've tried several online tutorials that all have essentially the same steps, and I'm getting the same results.
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Mar 31, 2010
I've been attempting to walk through the "Creating a Data Access Layer" tutorial found [URL]I create the DB connection, create the typed dataset and table adapter, specify the sql, etc.When I add the code to the presentation layer (in this case a page called AllProducts.aspx) I am unable to find the NorthwindTableAdapters.ProductsTableAdapter class. I tried to import the NorthwindTableAdapters namespace, but it is not showing up. Looking in the solution explorer Class View confirms that there is a Northwind class, but not the namespace I'm looking for.
I've tried several online tutorials that all have essentially the same steps, and I'm getting the same results.Can anyone give me a push in the right direction?I'm getting error: Namespace or type specified in the Imports 'NorthwindTableAdapters' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member.I think I might need to add a reference OR they may be creating a separate class and importing it into their main project. If that's the case, the tutorials do not mention this.
SuppliersTest2.aspx.vb:
Imports NorthwindTableAdapters
Partial Class SuppliersTest2
Inherits System.Web.UI.Page
[code]...
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Jan 12, 2010
i need the northwind databse. i dont have it in the database where i can find it and who to add it to my database in sql server so can i c it in the combo box off the database
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May 10, 2010
I'm now reading this article:[URL]But I don't understnad why this is better than just writing code, methods that connects to DB and get from stored procedore what I need.
Why is it better to use so much DataSets for all the tables and more.
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Jan 27, 2010
I can use similar code below to select a row in my database when I enter a value (username) in text box and it successfully retrieves.however, I'd also like to delete row from database based on the username i enter in text box. My code runs but no row is deleted...my code is:
SQL:
private AdminTableAdapter adminGetUsers;
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Apr 13, 2010
I keep all of my code in codeLib.cs and use it on various ASP.NET pages. However, I still have to do the databind(); in the code behind page for each aspx file. How can I eliminate all code in the aspx file so I just have the UI in the aspxand the code and databind(); in codeLib.cs.
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Jan 29, 2010
I am using DotNetOpenAuth in my ASP.Net Website. I have modified it to work with Facebook Connect as well, using the same methods and database structures. Now I have come across a problem.
I have added a Facebook Connect button to a login page. From that HTML button, I have to somehow pull information from the Facebook Connect connection and pass it into a method to authenticate the user. The way I am currently doing this is by:
Calling a Javascript Function on the onlogin function of the FBML/HTML Facebook Connect button. The javascript function calls a Web service to login, which it does correctly. The web service calls my data access layer to login. And here is the problem: FormsAuthentication.SetAuthCookie is set at the data access layer. The Cookie is beyond the scope of the user's page and therefore is not set in the browser. This means that the user is authenticated, but the user's browser is never notified. So, I need to figure out if this is a bad way of doing what I need or if there is a better way to accomplish what I need. I am just not sure and have been trying to find answers for hours.
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May 6, 2010
My repositories throw exceptions (System.Exception) when some things go bad and I know this is bad practice.. so i will create a custom exception (DataException). My question is should this custom ex class be in the repository layer or the domain layer? Im thinking it should be in Domain layer where all business objects and repository interfaces live but just want to make sure.
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Jul 12, 2010
Are there scenarios where it makes sense to encapsulate a data access layer (of a ASP.NET webapplication) with WCF or WCF Data Services ? Makes it sense to use a service inside the application ?
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Apr 6, 2010
im creating a database that needs a unique constraint on columns. does anyone know how to add this within the northwind database?
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May 20, 2010
Where can you download Northwind for SQLServer 2005? I tried this but there is no Northwind after the install... [URL]
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Jun 24, 2010
I am building a web site following the tutorials on asp.net. I am using dataset as data access lay, and writing classes to access the dataset. But the example is just basic ideas, how do I retrieve individual table column value in the business layer?For example, if I have a table called Product, I only want to find out what is the product name by product id. I did this in my ProductBLL:
public ProductBLL
{
public int GetProductName(string productId)
{
ProductDataSet.ProductDataTable prodData = Adapter.GetProductById(productId);
[code]...
Is there a better way, or am I doing this correctly? Can anybody give me a reference to a more complicated business logic model?
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Mar 12, 2010
i was attaching northwind database with sql server 2005 so while attaching it gives me an error an exception occured while executing a transct -sql statemnet or batch ,unable to eon physical file "C:sql server 2000 sample database orthwnd.mdf"
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Nov 25, 2010
I wan to retrieve spesific data from northwind and list in my compare page.
in the first page i used gridview with checkboxes. all selected values get with session and then
send to my second page. I can display this values in the page but how can i retrieve all product details from my northwind db i dont know.
here is my second page code behind.
[Code]....
and aspx page
[Code]....
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Jul 2, 2010
I have a Dynamic Data application to which I have added a class for extending EDM. Everything works great, but now I am trying to set an entity property value equal to a value in session state - and its not recognizing the Session command. I'm trying to do something like this:
audit.action_by = CStr(Session("person_name"))
I think this is because I do not have the class Inheriting Page, but if I do add Inherits Page it breaks other stuff. How can I have the class include the ability to utilize sessions directly without inheriting Page?
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Nov 9, 2010
I have a Web Site project running on VD2008, with an Access back end and .NET 3.5, C#.
I have created the project several times and added the usual App_Code, Pages, App_Data, Properties, folders. I created a Master Page and several content pages BUT I am unable to get to the folders or root where there is a Class (code) file.
I have tried all the usual lines...
using SumaCard.App_Code
OR
SumaCard.App_Code.FTP_Code ftpc = new SumaCard.App_Code.FTP_Code();
but nothing works? I have been hasseling over this for 2 days now.
What have I missed? Maybe I built the project wrongly? (Project | New Project | Visual C# | Web | ASP.NET Web Application |??
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Feb 9, 2011
my page is very simple, one gridviews and one ObjectDataSource.here's my code :
<%@ Page Title="" Language="C#" MasterPageFile="~/site.Master" AutoEventWireup="true"
CodeBehind="default.aspx.cs" Inherits="cHospital._default" %>
[code]...
I also posted my question on another web site, one suggestion I got is move my codes to codebehind
(http://entlib.codeplex.com/Thread/View.aspx?ThreadId=245208)
But this is ObjectDataSources, my understanding is everything have to stay in Class file.
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Mar 17, 2010
I was wondering if anyone had a tutorial or overview of the best way to store html in a MS SQL database, and then calling it back up and displaying it and should I save the decoded html in ntext?
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Jun 3, 2010
here i have in 3-tier architecture , how to pass the data between DAL and BAL. i am using grid view to edit the data,when ever i click on the edit button all the corresponding fields should come to textboxes. i tried for delete ,it works fine bt not working to EDIT.
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Mar 10, 2011
i have problem white Object datasource. i have a multi-tier Application that include common layer ,DAL Layer,business logic and persantation layerwhen i add a object datasource to my page, it bring me only common layer classes . but i want use bisuiness layer classes what do i do ?
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Jan 22, 2010
when trying to setup either sql or access DataSource control or Add- Connection in server explorer, i get the error 'the system cannot find the file specified' for my main user acct, its an admin for another admin acct going for same db, it works fine! in the past the 'cannot find file' error has sometimes turned out to be a permissions problem, but shouldn't be with 2 admin accounts. this is a .mdb and i can run access2003 no problem.i've checked the machine.config file for a bunch of suggestions on posts and even some registry keys, so far all checks out. evidently vs2005 has unique settings for each user, eg. i had to turn on line numbering for 2nd user. somehow i messed up my vs2005 settings for the problem user? or some registry key?
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Feb 3, 2010
Iam facing the problem with creating the Data Access layer using Dataset.xsd file and How to access the data from the file.
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Mar 15, 2011
recommend a data access class / helper class for Access databases, similar to the sqlhelper class found in the (Data Access Application Block)?
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Jan 29, 2010
I am trying to create strogly typed datasets for my project. When I right click on the xsd file that I need to generate a strongly typed dataset for I can't find the 'Advanced' properties as described in the below article (almost half way down)[URL]As I do not see the Advanced properties option I can't find the 'Custom Tool' property/option to set its value to 'MSDatasetGenerator'. Do I have to install some kind of patch on my VS 2005?
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Mar 26, 2010
where I can find a good generic tutorial on persistence data access layers?
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