Passing Status Message Up The Layers?
Jan 3, 2010
I am trying to work out the best way of dealing with a mailinglist class I have written. I got a simple form on the page where people can add their email address. Depending on which page they add their email address they join a differnet mailinglist. So from the form I have 2 values passed to the DAL {mailinglistID} and {email} - Various checks are done in the DAL, such as checking if email exists, checking if email exists in that mailing list etc etc.
I would like to be able to present the status codes on the page, so in the DAL I return a number value and from the BLL return a string depending on the number value. DAL returns 1, means email exists in mailing list, BLL see's the 1 and returns "email exists" to the page.
I have no idea if this is the right way of doing it or not - the (problem or question) is that in the content page I am checking the if the returned string is "" or has a value, and presenting the message in a visable div.
Is this the best way to do this, or should the status value be converted to a message on the code behind of the content page.
(of course I could have got this all wrong, and need to start again.
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Dec 28, 2010
I am having problem in returning a status message (success or failure) from my sql server sp here is the code:
[Code]....
"Status" is an output parameter which is supposedly getting the message from sp and we are not able to get its value since
"dbCommand1.Parameters["@status"].Value" returns NULL everytime!
SP is available on request.
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Aug 30, 2010
I am using VSS 2005 & webforms with AJAX Control Toolkit. I am using Update panels for saving different parts of my form. Problem being I update the user with the status setting either a label or literal value.
This value is visible on the form untill the page is refreshed. Is there any way to display a message and fade it away after some seconds ? Would be a life saver for me =)
I am using VSS 2005 but I don't think a simple fade would require much intellisense with JQuery ?
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Feb 25, 2010
The effect I want is that a status message band "slides" open after an action.I'm trying to implement this with an updatepanel in the master and setting it's control values from the web page, who's content is in another UpdatePanel in the master. in pseudo-markup:
[Code]....
I figure I could use an ajax accordion or something for the expanding effect...But I can't figure out the event timing and how to update the status message. If I update it within an exception in the child page, the message doesn't get displayed.How can I pass a status message to the master and have it displayed in the manner I explained?
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Sep 22, 2010
i am trying to figure out how to display message box after it done executing the server side code here is the code which works from the client side but still looking for a way to make it work from code-behind.aspx
<div id="status"></div>
script:
$("#status").fadeTo(500, 1, function() { $(this).html("You are now registered!").fadeTo(7000, 0); })
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Sep 21, 2010
I have a web form used for importing data from a CSV file. It contains a result panel and a result label, which either show a success message or an error message after the import process. Let me say here I know the page should not be doing the import, but this is legacy code and the client expects only small changes.
My problem is that the result message (label) retains it's previous content and visibility during the next import process, because clearing it during Page_Load or at the beginning of the import method only has effect when the import method is complete and thus the postback is complete.
At the moment, the only solution I can see is to move the import code into a separate class (as it should be), call the import method asynchronously, clear the result message, and thne set then result message when the complete or error callback from the import process is called.
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Oct 5, 2010
For an MVC 2 app that relies on many partial views and almost exclusively uses Ajax for POSTs/GETs, what would be the best way to implement the setting, passing, retrieval and display (using a JavaScript modal) of these messages?
My forms all POST (by way of jQuery $.ajax) to actions that return partial views (html) that are used to update a in the "success:" part of the $.ajax function.
I was hoping for some sort of mechanism in the master view that could "listen" for any messages that any of these partial views might be "delivering"--through their ViewData, for instance.
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Jun 14, 2010
I've got a page (menu.aspx) that contain a ListView, within the ListView is a user control which is just a GridView of items related to those in the listview. Now the overall page is linked to a master page (Master.admin) that has a simple Literal control that I use to display messages, etc.
What I need to be able to do is if I update, delete, etc something from the Gridview (user control), I would like it to display what ever message I send to the Literal control
I can do it from the actual ListView itself by doing somethihg like ((Master_Admin) Master).Text +=
"My message";
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Mar 20, 2010
I started with error handling. I need my. "Message" to show the status code (404, 500 etc) instead of displaying text.
[Code]....
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Jun 17, 2010
i have one independent form where i am checking read only access of an xml file , if the file is read only then i have to display message in the status bar of MDI form. since i am using independent form to valid xml file, status bar of the MDI form is not displaying the error message. now how to display message?
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Jan 24, 2010
I was wondering how i could implement a message passing facility through a social networking website i am making. Instead of creating it all from the start, is there a much more simple approach i could possibly take?
I quite like the way facebook does it, how is this done?
I am ok with AJAX but would prefer something really simple not to the extent of adding emoticons etc.
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Jan 9, 2011
I'm writing an HTTP handler in ASP.NET 4.0 and IIS7 and I need to generate a file-not-found condition.
I copied the following code from Mathew McDonald's new book, Pro ASP.Net 4 in C# 2010. (The response variable is an instance of the current HttpResponse.)
response.Status = "File not found";
response.StatusCode = 404;
However, I found that the first line generates the run-time error HTTP status string is not valid.
If, instead of the lines above, I use the following:
response.Status = "404 Not found";
Then everything seems to work fine. In fact, I even see that response.StatusCode is set to 404 automatically.
My problem is that I don't want this to fail on the production server. So I'd feel much better if I could understand the "correct" way to accomplish this. Why did the first approach work for Mathew McDonald but not for me? And is the second approach always going to be reliable?
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Feb 25, 2011
how the WCF, DAO and DTO layers communicate with each other? I would appreciate if someone can specify which layer comes first and then how it interacts with the next layer
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Mar 7, 2010
I have a form with mulptile panels hidden behind others. It is impossible to edit them in design mode without moving them to the side so that all panels are visible, so that is what I do. I use JavaScript to position the panels during runtime, but it is an innefecient way to do it.
Is there a way to make a panel or layer visible or invisible while working in design mode, kind of like autocad works
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Nov 18, 2010
I want to use Linq to SQL in my web projects. I mostly work in small and medium size projects. Please guide me what layers I should use ?
Previously I was using DAAB and was using 4 layers (business objects, business logic layer, data access layer and user interface).
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Apr 19, 2010
I am using layered architecture in dotnet (mostly I work on web projects). I am confuse what layers should I use ?
I have small idea that there should be the following layers.
user interface
customer types (custom entities)
business logic layer
data access layer
My purpose is sure quality of work and maximum re-usability of code.
some one suggested to add common types layer in it. Please guide me what should be layers ? and in each layer what part should go ?
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Nov 4, 2010
While designing (and then implementing) a layered application:
Is it correct to use the same ORM objects accross all layers? (which would go against encapsulation).
Or the presentation, business and data layer should each have their own objects? (which would lead to lots of code repetition).
e.g. (just to illustrate the question): if one uses Linq to SQL in the Data Layer and Visual Studio's O/R designer to generate the ORM objects, are those objects supposed to be used in the Business and Presentation Layers as well.
i.e.: Are the objects associated with the entities that the application handles a crosscutting issue?
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Nov 1, 2010
Split off from http://forums.asp.net/t/1618613.aspx
I would like to get your advise on Dependency Inversion..Should i include it as a layer between Business Layer and Repository Layer?
I think its really great when different team members work on DAL n BAL etc or when your database will be changed in future. It actually removes the dependency of the Data provider but over the expense of additional coding overhead. My question is , is it really worth it? If i suggest this layer to my PM and give him the above two reasons then i dnt think he will accept it since most of the time each developer works on his DAL/BAL's, and Change in DB wud be the least of his concerns.
RAD in every layer..
I mean if there are any auto generation tools available for generating repositories etc.I read about MVCContrib Grid and i think its a good option to use for Grid.
If i use Spark ViewEngine then can i still use T4 templates to auto create custom views by customizing templates?
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Jul 6, 2010
I have three layers like UI, business and data access in my asp.net web application project. If I pass say a company code from the UI to the business to the data access and I query the company details like company name, address, phone etc from the database using sqlhelper executedataset() which wil return me a dataset. Then how do I pass these company details back to the UI layer. Is it correct to just pass the datatable object to the business and UI.
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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;
//>>Returns a new connection to the database
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");
return connection;
}
}
public class UserDAL : BasicDAL
{
//>>Insert a new user
public void Insert(User user); { /* Insert into DB */ }
//>>Authenticate user login with its password
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.
My first problem lies on Business Logic Layer. With the above scenario, I've placed the same methods that I placed at the DAL. BLL methods would call DAL. As simple as that but I believe It is not the best way to do it, is it? How can I improve those classes?
Also, I have to "try..catch" blocks. That's because I can't find good places for it. I mean, if I place a try..catch on GetConnection method, for instance, how my ASPX page would get this error? How my ASPX page can tell the difference between "database offline" and "sql syntax error" when executing "userBll.Insert(newUser);".
My problem is mainly placing the exception handlers. I understand I would probably have to change return type of some methods. I didn't change because I believe that will have something with the exception handlers.
Btw, please assume I can't use TableAdapters and stuff like that. I would like to create all layers by myself.
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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);
is it better to create xsd file in VS2010 with only fill (all other implemtation i'll do on my own) property.
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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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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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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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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