Data Access Layer - DAL DatasSet And Table Adapter Not In Namespace - Northwind Tutorial?
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]...
View 7 Replies
Similar Messages:
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.
View 1 Replies
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?
View 16 Replies
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.
View 7 Replies
Mar 3, 2011
I creating 3 tier arch wpp in VS 2010. I added the BusinessAccessLayer refernce in Presentation Layer. and I created DataAccessLayer[DAL] and ORM [DBModel.DBML]. when i try to create the instance for the Table in presenation layer[default.aspx], The Table name is not shown.After adding the DataAccessLayer refernce in the presentation layer, the table name[MM_User] instance are shown.Is it the right method [Adding the DAL refernce in Presenation Layer]? If not, whats the solution for for accessing the instance of the tables[MM_User].Is it related to the Creating the DataContextWrapper class in DAL?
View 5 Replies
Nov 19, 2010
I have a profile of member to be displayed. I am using a dataset with all the data table adapter to retrieve the information from database.
I have a memContact method which has NRIC and Number as a composition primary key. Thus, automatically, the table adapter has created a method called FindByICNum () for me. However, when I do the search to display the contents, i will only need to search by memberic instead.
Is there anyway to change the table adapter query?
View 1 Replies
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.
View 2 Replies
Jun 27, 2010
how can i get a single row from strongly typed dataset table data adapter in c#?
View 2 Replies
Mar 26, 2010
where I can find a good generic tutorial on persistence data access layers?
View 2 Replies
Feb 2, 2010
I was having issues with a gridview and CSS so I posted my question here and received a wonderful answer which lead me to implementing CSS Friendly Adapters for all of my gridviews.I have a table nested in the EditItemTemplate that holds the textbox and the button for a calendar control where I want them, it inherits the CSS applied from the CSS Friendly Adapters. I don't want it to change the CSS so I have changed the CSS inline, with no success. More importantly...
I also have a Ajax calendarExtender control to change the date for that field. When the popup is displayed the table in which the calendar is shown in also inherits the CSS Friendly Adapters code. I have tried fixing this by creating a external css sheet for the calendarExtender's cssClass property and a blending of CSS occurs where the items not specified by the Friendly Adapter Code are set correctly by the calendar.css file that I created.Is there anything that I can do to force the tables inside of the gridview to ignore the inherited Friendly Adapter Code?
View 4 Replies
Sep 7, 2010
Here's a short explanation of my asp.net project.
1) the default page loads, it will read the Windows Login of the user opening the page.
2) I'll check if this login exists in a table stored on the webserver.
In this Access Database, there's a 2nd linked table, pointing to another access table on a network location. Now, I want to read data from this linked table. However, at this moment I receive an error:
"The Microsoft Jet database engine cannot open the file '\<ip><shared-folder>statistics.mdb'. It is already opened exclusively by another user, or you need permission to view its data".
Some extra info:
- The network folder has read and write permissions for everyone
- the user and group permissions on both access files are set to read/modify/administer for the Admin user (on the tables I want to read from)
- IIS authentication on the server is set to "Windows Authentication" (this is needed so I can read the Windows Login from the user). All other authentication modes are disables (like anonymous, ...)
- When the error occurs, no other program or process has access to the statistics.mdb (so, it can't be locked by someone else)
- the web.config files access connection string looks like:
<add name="AccessConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\<IP><shared-folder>statistics.mdb;User Id=admin; Password=;" />
Like I said before, in this statistics.mdb file, there are 2 tables. One normal table, and another linked table (pointing to a network location)
Searching for solutions, I discovered the following:
- if I don't use linked tables, everything works fine (however, I have to use this linked table)
- even if I connect directly to the table in the network I receive the error. So, I'm pretty sure I don't have sufficient rights to read from this table.
I read that not the Admin user is opening the file, but actually a user called ASP.NET. This user doesn't have the correct rights to do this. However, I'm not sure if this is true.
View 5 Replies
Aug 25, 2010
In old style i used to return datasets to BOL (From DAL) and then to Website. but in 3.5 is there any new way to construct DAL. i heard about returning List<> is better than DataSet. I Got to build new DAL for my new project. if i should go for List <> aprroach can i use Linq to Sql technique or shall i go for execute dataset (using applicatio block libraries) and then fill data in List<> prior to return it back to BOL.
View 1 Replies
Feb 2, 2010
I want to get the .cs class file that we use when we work with the data base. and then I can just include it in all the files.
it should contain all the information like rundbquery, runstoredproc,runstoredprocwithparams....etc.
View 3 Replies
Nov 1, 2010
I am developing a web application in Visualt Studio 2008. I have a data access layer that is automatically generated using Visual Studio. After publising my site to IIS and tested it for several hours, two exceptions occured:
[Code]....
The connection string is stored in the data access layer in Properties.Settings and has not changed.Does anyone have a clue why these exceptions occur and how i can avoid them?
View 1 Replies
Aug 18, 2010
I have been researching for a while and have actually created a prototype ASP.NET web service as a DAL for a few ASP.NET 2.0 web sites. Just would like to ask for some insight/advice from more experienced developers out there who had successfully rolled out DAL as a web service. What are the drawbacks/risks to deploying DAL as a web service? What is the best way to secure or authenticate consumption of this web service? WCF is out of the question, I'll be coding in VS 2005.
View 4 Replies
Jul 12, 2011
I am trying to update an access DB using a table adapter created within a vs 2010 dataset file. When i click my submit button nothing happens. Also using an insert method created the same way it works.... When I dubug using the immediate window i receive this message:
Argument not specified for parameter 'StockNum' of 'Public Overridable Function UpdateQuery(StockNum As String, Year As String, Make As String, Model As String, Color As String, Location As String, TiresNeeded As Boolean, StockIn As Date?, SvcRONum As String, UCIStartDate As Date?, UCIEstCompleteDate As Date?, Repairs As Boolean, CollisionRONum As String, Detail As Date?, Other As String, OnLot As Boolean, OffProperty As Boolean, Sold As Boolean, Original_RecNum As Integer) As Integer'
The PK column in this DB is recNum. Here is a snippet of the code:
Code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
getData(Request.QueryString("param1"))
End Sub
Private Sub getData(ByVal user As String)
'declare variables to fill
[Code] ......
View 4 Replies
Jun 14, 2010
I've VS2008 and enterprise library 4.1 installed .I want to display few records in the categories table of my NorthWind in my presentation layer through data access layer with enterprise library. I've added references of the following dlls in my data access layer project( which is of type class library)
Microsoft.Practices.EnterpriseLibrary.Common
Microsoft.Practices.EnterpriseLibrary.Data
Microsoft.Practices.ObjectBuilder2
how to access data from the database using datareader , entity beans and rendering data on to presentation layer.
View 2 Replies
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.
View 8 Replies
Sep 21, 2010
I have a potential project where I would be working on developing the "Data Access Layer" of a reporting application using ADO.Net and LINQToSQL.
I have not specifically worked on a Data Access Layer project (middle tier), so I was wondering if anyone here could provide a sample / example / resource, where I can get an idea of what the project entails.
View 1 Replies
Feb 28, 2011
I'm trying to retrive images from SQL (2005) using ASP.NET 2008
At present I have a business object layer and a data access layer to get some data from the database. This works fine but now, i would like to also retrive an image along with the data.
part of my business object layer is shown below, how can i incorporate the image into this.
I have a DLL file which will take care of displaying the image in the web page once i have retrived it.
[Code]....
View 3 Replies
Jul 18, 2010
I am trying to add "Select Scope_Identity()" to my table adapter but vs2010 respond with "Unable to parse query text." error message.
Code for Insert SQL is -
INSERT INTO orders
(creditAutorizarionNumber, OrderName, OrderPersonPhone, OrderPersonEmail)
VALUES (@creditAutorizarionNumber,@OrderName,@OrderPersonPhone,@OrderPersonEmail)
I tried to add -
;Select Scope_Identity()
How can I use the Scope_Identity() withing a BLL table adapter ?
View 2 Replies
Jan 11, 2010
I have a strange issue. I have a XSD file where I have created some TableAdapters. When I have reopened the XSD file it seems like I am not able to create a new table adapter since all the options which will come when I right click on the XSD file are disabled. I have cross verified whether I am on debugging mode but...I was not..(I am not even able to drag and drop an adapter from the left toolbox menu either)I am getting the same issue when I open the same XSD file on somebody else machine but I am able to create TableAdaperts in other XSDs.Can somebody suggest me a solution for this
View 5 Replies
Feb 4, 2011
I am developing a web application, which has Data Access Layer and this layer has only one class, in which all methods are static methods like static Insert, static Update, static Search. It has no properties. I am using these methods in my Bussiness Logic class for my users who are visiting my website.Now my question is : 1. Is it right to use static methods in this scenario ?2. What will happen if 10 users call Insert method at the same time ?
View 3 Replies
Nov 15, 2010
I have created a table adapter in DAL. I have created a gridview in the page and want to fill the gridview with a table data by calling a method. My table has 11 columns but i want to display only 2 columns of the table. My getSong() method has a query as Select title, category from Muisc. But it diaplyas all columns with no data except title and category and the autoincrement primary key column with negative values. The pic is given below. How can i solve it?
View 2 Replies
Feb 10, 2011
I am creating my application in asp.net 3.5. I have to make my Data Access layer, in which I am doing the traditional method of fetching/updating the data. Which is SqlConnection than SQLCommand, than SQLadapter. Will there be any other way I can create my DAL layer easily.
Specification.
My website is small. Approx 7-10 pages. Database has around 80 tables.
What I know:
Linq to SQL - I don't want to use it because I am not fully aware about the LINQ statement and I need to develop the application really fast. [3 days :-( ]. Also, there are 100% chances that the table structure will be altered in future. Enterprise Library: It will take too much time for me to integrate to my application.
View 4 Replies
