Web Forms :: Asynchronous Paging And 3 Tier Layers?
Sep 3, 2010
I have a query about asynchronous paging using RegisterAsynchTask or AddOnPreRenderCompleteAsync
If I have a 3 tier web application with the UI, Business Layer and the Data Access Layer and I'm doing the Begin and End asynchronous processing of a method at page level (UI). This UI method accesses the DB and goes through all the layers starting asynchronously from the first page, then continuing "normally" through all the other layers. These underlying layers are all synchronous but started asynchronously through the first Page.
My question is how should asynchronous paging processing be handled with regards to layers? Do I need to set the methods being used at all levels asynchronously (using Begin and End event handlers) ?
And what about MasterPages... I can't Asynchronous processing for them. RegisterAsynchTask is not available and neither AddOnPreRenderCompleteAsync.... what I'm missing?
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Feb 17, 2010
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EDIT:
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Jul 30, 2010
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[Code]....
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[Code]....
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Nov 1, 2010
Split off from http://forums.asp.net/t/1618613.aspx
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RAD in every layer..
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Jul 6, 2010
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Jan 26, 2010
I'm trying to create my first Asp.Net application from scratch. Tried to create this post in some of the other forums but I couldn't find a better place.
So, as the title says, I'm having trouble trying to model my application. I'm like an OOP newbie. I'll show my classes first and then I'll write my questions.
Model Layer
public class User
{
private int id;
public int Id { get { return id; } set { id = value; } }
private string login;
public string Login { get { return login; } set { login = value; } }
private string password;
public string Password { get { return password; } set { password = value; } }
}
Data Access Layer
public class BasicDAL
{
private SqlConnection connection;
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public SqlConnection GetConnection()
{
//>>If connection is active close it before starting a new one
if (connection != null)
if (connecion.State != ConnectionState.Closed)
connection.Close();
connection = new SqlConnection("MyConnectionStringHere");
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}
}
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{
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public void Insert(User user); { /* Insert into DB */ }
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public void Authenticate(User user); { /* Authentication code here */ }
}
Business Logic Layer
[Code]....
So, model layer is pretty simple. Just a user representation. On the Data Access Layer I have a basic class with a GetConnection method. All DAL classes will extend this one.
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(of course I could have got this all wrong, and need to start again.
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Mar 25, 2011
i am creating a class library project and adding new ado.net data model into it. created model automatically generetes codes. ModelENtities and entity classes.
i want to separate ModelEntities context class and entity calsses to two layer as two class library. is this possible?
assume that I do this and when I update the model from database , do separated classes update?
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Jan 14, 2011
I have a theoretical question.i have a function in DAL that does a select sql query. and these are my questions:
I was told that it's not appropriate to pass datasets between layers. so how should i pass the results? which value should i return to the BLLBAL (i thought of a List<>).? and to the presentation layer.
currently my implemention is like that:
SqlCommand cmd = new SqlCommand("getRequestById", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@requestId", rId));
SqlDataAdapter datAdp = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
datAdp.Fill(ds,"getRequestById");
List<String> rs = new List<string>();
for (int i=0; i<11; i++)
{
rs.Add((Convert.ToString(ds.Tables[0].Rows[0].ItemArray.GetValue(i))));
}
return (rs);
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I added New Item, DataSet, over that i added tableadapter with stored procedure. i declared that it will do only the fill property(without returning the data). i want to implement all the other properties by demand in my way.
i wrote in the dal test.getRequestById1DataTable dt1 = new test.getRequestById1DataTable() how can i get the data and pass it between the layers?
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Oct 30, 2012
How to create the DAL Layer for the 3tier Architechture
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Mar 5, 2010
If I have a 3 layer web forms application that takes user input, I know I can validate that input using validation controls in the presentation layer. Should I also validate in the business and data layers as well to protect against SQL injection and also issues? What validations should go in each layer?
Another example would be passing a ID to return a record. Should the data layer ensure that the id is valid or should that happen in BLL / UI?
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Mar 13, 2010
Here is the scenario.
Every project has a Supervisor.
When I select the supervisor for a particular project, I'm using a dropdownlist.Table is like this
ProjectId | SupervisorId | ......
--------------------------------------
1 | 1
In my application, I'm binding a Collection of Supervisor type, which I'm feeling that it is an additional overhead. Becuase I only want his ID. So binding an object collection to the dropdown which seems no worth.
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May 19, 2010
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Could and should my BL object inherit those entity model in the DAL, so I dont need to recreate their object's property?
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May 17, 2010
How can I share the auto-generated entity data model (generated object classes) amongst all layers of my C# web app whilst only granting query access in the data layer? This uses the typical 3 layer approach: data, business, presentation.
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It was recommended to have a seperate layer with just the data model, but I'm unsure how to seperate the data model from the query functionality the entity framework provides.
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