Re: Design using MVP pattern - ASP.NET Discussion Boards

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Re: Datatable problem

Abhijit Jana28-Jul-09 17:52

Abhijit Jana

28-Jul-09 17:52

Yes ! Because you can't use Autoincrement no as serial No. Supopose, you have 1,2,3,4,5 ID in table and you delete 4. If you again insert any recored, then new record ID should be 6. Not 5.
So, Do as navaneeth suggested . Big Grin | :-D

Abhijit Jana | Codeproject MVP
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How to bypass ISA Server programmatically?

just3ala228-Jul-09 8:02

just3ala2

28-Jul-09 8:02

Dear All,
I have two web applications one behind ISA and the other is accessible directly
How can I send the credentials to ISA login page and go directlty to the first web application?
I can connect using HttpWebRequest with the credetials and get the response but when I redirect to the web application I'm asked for the credentials again.

Best Regards
3ala2 Smile | :)

Web page is not runing!!!!!

zeeShan anSari28-Jul-09 7:51

zeeShan anSari

28-Jul-09 7:51

hi all

,
In local host my web site working well.So i publish the website and upload the every file from publish folder to the server through cuteftp.when i run the website then

Server Error in '/' Application.
Runtime Error

shows on my default page........can anybody tell me where is problem.
thanks

Re: Web page is not runing!!!!!

zeeShan anSari28-Jul-09 8:08

zeeShan anSari

28-Jul-09 8:08

<!--<authentication mode="Windows"/>-->
Line 59: 
Line 60:     <authentication mode="Forms">
Line 61: 
Line 62:       <forms defaultUrl="~/PresentationLayer/Forms/Main.aspx" loginUrl="~/Default.aspx"  >

problem is here

Re: Web page is not runing!!!!!

Abhijit Jana28-Jul-09 8:34

Abhijit Jana

28-Jul-09 8:34

Does you virtual directory configured properly on IIS ?

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Re: Web page is not runing!!!!!

N a v a n e e t h28-Jul-09 15:50

N a v a n e e t h

28-Jul-09 15:50

Have a look at the Event Viewer.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Design using MVP pattern

Cybernate28-Jul-09 5:15

Cybernate

28-Jul-09 5:15

Hi,
I am trying to implement a site(Read/Update/Delete operations site) using MVP pattern. Also trying to keep the presentation layer UI agnostic(i.e. Presentation layer should work with a Web Client/Windows Client).
Now I have a domain object with around 30 fields/attributes and all of these fields are editable in the UI(View).

I want to propogate the change in any field to the Presentation layer. The only solution I can think of is to define 30 events!!! in the View and 30 handlers in the Presentation layer or define 30 setter methods in the presentation layer for the 30 event handlers in the view.

Am not comfortable with this design.
Can any one provide me a solution or a direction on this?

Regards,
Cybernate

Re: Design using MVP pattern

Jeremy Likness28-Jul-09 9:22

Jeremy Likness

28-Jul-09 9:22

First, why should the presentation layer work in two different presentation models?

You mean the controller?

I can see this:

Model <shared>
Controller <shared>
View - one instance for web, one instance for web form

That makes more sense to me.

I'm also assuming your changes are to "something" not just random fields, but fields that belong to an object.

So why not maintain the original object state in the controller:

Controller<T> where T: class

T _state;

Have a typed args, something like:

public class TypedArgs<T> : EventArgs where T: class
{
public T Value { get; set; }
}

Create an interface for your views:

public interface IView<T> where T: class
{
event EventHandler<TypedArgs<T>> Changed;
}

then you can raise Changed with the new entity in the view, and have the controller register. Just pass in IView to the controller so it doesn't care if it's a user control or a web form, and when Changed is raised, it can compare e.Value to the stored state and decide what to do.

Jeremy Likness
Latest Article: Hierarchal Data Templates in Silverlight
Blog: C#er : IMage

Re: Design using MVP pattern [modified]

Cybernate28-Jul-09 9:54

Cybernate

28-Jul-09 9:54

Thanks Jeremy.
I tried to provide my question with an example.

I have a scenario where I have to display a view with around 30 fields(some are textboxes and some are Dropdowns) and the Business Object to represent the entity would be something like:
[CODE]
Parent
{
PField1
PField2
.
.
.
.
PField19
PField20

List<Son> Sons;
List<Daughters> Daughters;
}

Son
{
SField1
SField2
SField3
}

Daughter
{
DField1
DField2
DField3
DField4
DField5
}
[/CODE]

Am capturing/displaying the whole business entity in a single view.

Now the user can change the base fields of a parent or change the fields of a son/daughter.

Now how should I handle the change events for each field in the view, should I delegate the change events to the Presenter and then let presenter update the view. This requires to define 22 events in the View and then 22 delegate events in view and 22 event handlers in the presentation layer.

Somehow am not having a good feeling about this design.

Can you please advise?

Regards,
Cybernate

modified on Tuesday, July 28, 2009 4:01 PM

Re: Design using MVP pattern

N a v a n e e t h28-Jul-09 15:55

N a v a n e e t h

28-Jul-09 15:55

AFAIK, MVP is not well suited for web-applications. It works well with stand-alone applications. You may try the MVC model. ASP.NET has a MVC framework available. Give it a try.

Cybernate wrote:
I want to propogate the change in any field to the Presentation layer. The only solution I can think of is to define 30 events!!! in the View and 30 handlers in the Presentation layer or define 30 setter methods in the presentation layer for the 30 event handlers in the view.

That is ugly. You can have only one method in the presentation layer which takes an aggregate data structure and does the UI binding. Read this[^] MSDN article which takes MVP pattern in detail.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Re: Design using MVP pattern

Cybernate28-Jul-09 16:21

Cybernate

28-Jul-09 16:21

Thanks for your inputs.
I am not sure if I agree with you on MVP not suited for Web Apps.
Regarding the 30 Events statement I was being sarcastic.
Thanks for trying though.

Regards,
Cybernate

user availability

gora1234528-Jul-09 4:43

gora12345

28-Jul-09 4:43

hi guys...
i want to make a user availability control in a ajax enabled asp.net website

so i placed a textbox & a label(which shows the username exists or not ) inside the updatepanel

i use a button(placed outside updatepanel) as a trigger for asynchronous postback of the updatepanel

all works fine ...but the page is reloaded.....i mean the user have to wait a few seconds for the output...

but i want it asynchronously ...so the total page is not updated...

help me .....

Re: user availability

Vimalsoft(Pty) Ltd28-Jul-09 4:49

Vimalsoft(Pty) Ltd

28-Jul-09 4:49

Make sure that the Updatepanel updatemode is "Conditional" and set your textbox autopostback to "true"

Vuyiswa Maseko,

Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.somee.com
http://www.vuyiswamaseko.tiyaneProperties.co.za
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/

Re: user availability

gora1234528-Jul-09 5:32

gora12345

28-Jul-09 5:32

i have done this all....
but still the pasge is reloaded....invisible for a little time & then shows the output

Re: user availability

Vimalsoft(Pty) Ltd28-Jul-09 20:07

Vimalsoft(Pty) Ltd

28-Jul-09 20:07

can i see the markup

pls help

jude mgbaka28-Jul-09 4:19

jude mgbaka

28-Jul-09 4:19

pls i was running an application ,when i clicked on a radio button,it threw a java script error "object expected and i need it resolved

Re: pls help

Abhijit Jana28-Jul-09 4:21

Abhijit Jana

28-Jul-09 4:21

jude mgbaka wrote:
when i clicked on a radio button,it threw a java script error "object expected and i need it resolved

It means object is not found. Please show us the code.

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.
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Re: pls help

Vimalsoft(Pty) Ltd28-Jul-09 4:22

Vimalsoft(Pty) Ltd

28-Jul-09 4:22

We cant know until we see the code Smile | :)

Re: pls help

Brij28-Jul-09 4:27

Brij

28-Jul-09 4:27

Are you calling any javascript function on radiobutton click.Check that are you able to get all the controls object properly?

Cheers!!
Brij

Re: pls help

Abhishek Sur28-Jul-09 5:40

Abhishek Sur

28-Jul-09 5:40

I think the javascript function that you are calling doesnt exists which is fired when Radiobutton is clicked.
Or it must be thrown from the javascript function itself. Frown | :(

Abhishek Sur

My Latest Articles
Working with Excel using MDAC

Basics on LINQ and Lambda Expressions

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Re: pls help

Christian Graus28-Jul-09 10:42

Christian Graus

28-Jul-09 10:42

Seriously, if you think we can help based on this, you probably are so far out of your depth that you should give up on your current project and try to learn some basics first. We can't possibly fix your code if we can't see it.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Paging in datalist

Ersan Ercek28-Jul-09 4:13

Ersan Ercek

28-Jul-09 4:13

I am used to work with datagrid, now I am wondering whether or not datalist has paging option?

Re: Paging in datalist

Brij28-Jul-09 4:21

Brij

28-Jul-09 4:21

Look this link

Hope it'll be helpfull

Cheers!!
Brij

Re: Paging in datalist

Abhijit Jana28-Jul-09 4:45

Abhijit Jana

28-Jul-09 4:45

Ersan Ercek wrote:
r not datalist has paging option?

Have a look
Paging In data list
And a lot more from Google

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.
View My Latest Article

Customizing Gridview

srikantha_nagaraj28-Jul-09 3:59

srikantha_nagaraj

28-Jul-09 3:59

Hi,
How to Customize my Gridview? As per my requirement i want to show blank line in gridview, which will differ the two sets of data.

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