Re: ThreadPool thread limit = potential deadlock? - ASP.NET Discussion Boards

ptr2void27-Mar-08 19:12

27-Mar-08 19:12

Hi..
I am new to asp.net..
I want run some client side applications from my asp.net web application using activeX controls..
I didnt find much on google about this..
Does anyone know how to do it?

Som

Re: activeX Control..

Christian Graus27-Mar-08 19:32

Christian Graus

27-Mar-08 19:32

You need to write an active X control and pray that the browser will give you access to the host file system. As I said to you before, I think the odds of that are close to zero for what you want to do.

Christian Graus

Please read this if you don't understand the answer I've given you

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: activeX Control..

ptr2void27-Mar-08 19:42

ptr2void

27-Mar-08 19:42

Christian Graus wrote:
You need to write an active X control

This is what I want to know , how to go about doing it..
How to write the activeX control for asp.net..
Couldnt find much on google..

Do you have any other option apart from using activeX to run specific applications in the client machine?

Som

Re: activeX Control..

ptr2void27-Mar-08 20:35

ptr2void

27-Mar-08 20:35

I have created a C++/CLI Application which needs to be run from the web..
Initially the application would reside in the clients computer, via an installation process..

Now whenever the user logs in in the website, I need to run this application from the clients machine to run and it would send information back to server from within the application..

I am stuck up on the part that how to run the application on the client machine when the user logs in..

Can anyone advise on this..
How to write an activeX for this..
Or any other ideas??

Som

ThreadPool thread limit = potential deadlock?

Mike Marynowski27-Mar-08 12:05

Mike Marynowski

27-Mar-08 12:05

Hi,

I was thinking about the following scenario, and how it might cause a deadlock (in the case of 25 maximum threads):

-Thread1 locks object A
-Thread2 to Thread25 are created and all attempt to lock object A (but are put in a waiting state until Thread1 releases the lock)
-Thread1 creates another thread (Thread26) to perform an asyncronous operation, and waits for that to finish before releasing object A from the lock

now, since there are already 25 threads going, it seems to me like Thread26 will not be allowed to execute until another thread finishes...but that will never happen because all the other threads are waiting for object A to be released...which will never be released because Thread26 will never start executing, let alone finish...so everything will go into deadlock.

Am i missing something here? Perhaps when a thread waits for a lock to free, the ThreadPool allows another thread to execute while it waits?

Altho this seems like a far fetched situation, I can definately see it happening if you have a global Context.Application object being used a lot, and one thread happens to take a while to execute while it is locked (which is a potential scenario in an application I'm writing right now).

Thanks,

--Mike

Re: ThreadPool thread limit = potential deadlock?

N a v a n e e t h27-Mar-08 16:37

N a v a n e e t h

27-Mar-08 16:37

mmGoDLiKe wrote:
Thread1 creates another thread (Thread26) to perform an asyncronous operation

How about starting this thread as a new one instead of using the one in pool ?

mmGoDLiKe wrote:
I can definately see it happening if you have a global Context.Application object being used a lot,

Yes, we had the same issue. The previous project which I worked were using "Application" object for caching frequently used data. We changed this to cache and everything started working normally.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Re: ThreadPool thread limit = potential deadlock?

Guffa28-Mar-08 1:59

Guffa

28-Mar-08 1:59

mmGoDLiKe wrote:
Altho this seems like a far fetched situation

It sure is. Locking should be used sparingly, and you should use it for as short a time as possible. You should definitely not do something like starting another thread and wait for it to finish inside a lock.

Despite everything, the person most likely to be fooling you next is yourself.

Re: ThreadPool thread limit = potential deadlock?

N a v a n e e t h28-Mar-08 3:03

N a v a n e e t h

28-Mar-08 3:03

Guffa wrote:
You should definitely not do something like starting another thread and wait for it to finish inside a lock.

Please correct me if I am wrong - AFAIK, if we start a new thread (not from the pool), it will get executed and lock will be released. It won't be queued as it is not accessing the locked resource. Can you tell me why it is a bad way to start new thread inside a lock ?

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

How to use google | Ask smart questions

AJAX UpdatePanel for Menu Control

Ekjon27-Mar-08 10:54

Ekjon

27-Mar-08 10:54

I am using Menu controls in combination with MultiView controls.

So, I wanted to use the update capability of the AJAX's UpdatePanel Control.

However, it works fine for the MultiView- View controls, but not for the Menu.

The error is generated from WebResource.axd file saying "0.cells is null or not an object" - coming from a statement referring to "rows[0].cells.length".

Anybody knows about it?
Thanks.

Ekjon

Re: AJAX UpdatePanel for Menu Control

Ekjon27-Mar-08 18:06

Ekjon

27-Mar-08 18:06

Never mind, I'm going to try this:

<asp:updatepanel id="upnlMenu" runat="server" childrenastriggers="false" updatemode="Conditional">

Doing a sync(normal) postback from and gridview inside an ajax updatepanel

Bogdan Damian27-Mar-08 10:31

Bogdan Damian

27-Mar-08 10:31

In the last days I started to add some ajax functionality to an existing non ajax application using aps.net ajax. One of the tasks was to move an existing gridview into an update panel so that it can be refreshed without page loading. The problem that I’ve encountered was that I couldn’t do a normal (sync) postback from the grid view. So I lost a half a day searching for an answer Cry | :((

.
The solution is to use the ScriptManager RegisterPostBackControl function and register the links/buttons for which you need normal postback here.

<br />
        foreach (GridViewRow row in ClaimGridView.Rows)<br />
        {<br />
Control c = (Control)row.Cells[0].FindControl("myctrl");<br />
            ScriptManager.GetCurrent(this.Page).RegisterPostBackControl(c);<br />
        }<br />

PS:

I also tried using another UpdatePanel for my column and adding an asp:PostBackTrigger but it didn't not work.

Bogdan Developer
e-Projects ro

Manually consume webservice

mpavas27-Mar-08 9:51

mpavas

27-Mar-08 9:51

I need to consume a webservice on a DOt net applciaion. But the server does not ahve studio installed. How can I do it. Can some one guide me step by step. I know i need to create disco file and wsdl but in what sequece Do not know.

Please suggest

Regards,
Pavas

Re: Manually consume webservice

Christian Graus27-Mar-08 11:32

Christian Graus

27-Mar-08 11:32

If you're writing a .NET app, you can consume the webservice in your app. Are you saying that you are not using visual studio, or are you saying that the server that runs the app doesn't have visual studio ? If you point visual studio to a web service, it will create the disco files, etc. And you don't need VSS installed on the machine that uses it.

Re: Manually consume webservice

mpavas28-Mar-08 5:03

mpavas

28-Mar-08 5:03

Yes, No studio on the machine. I want to do it with wsdl command

Regards,
Pavas

ADAM Roleprovider class in ASP.NET 2.0

K.P.Kannan27-Mar-08 8:22

K.P.Kannan

27-Mar-08 8:22

We need to use ADAM as a role and authentication provider. I am able to use ActiveDirectoryMembershipProvider in System.web.security namespace to insert user. I would like to AddUserstoRoles. We could not get any sample code for that. We need to implement one or more RoleProvider methods. Could anybody suggest any sample code for this. We are trying with Azman also. Suggestions and sample code if any needed as to what would be the better way to use ADAM provider

Re: ADAM Roleprovider class in ASP.NET 2.0

RasmusLP30-Jun-08 5:16

RasmusLP

30-Jun-08 5:16

Did you find a solution?

Ajax Login

Ed.Poore27-Mar-08 7:53

Ed.Poore

27-Mar-08 7:53

Ok, my situation is that I've got an AJAXy login control on a master page. There's basically a link button which launches another page inside a thickbox[^]. If I log in from the home page /Default.aspx then everything behaves.

The problem is when you try and log in from another page e.g. /Businesses/Default.aspx then the server login fails with a 500 error, saying that the method 'Login' failed.

Any ideas?

My Blog[^]

Required Fields ?

kindman_nb27-Mar-08 7:42

kindman_nb

27-Mar-08 7:42

Hi guys..
I'm sorry that I'm taking my first steps in asp.net
then ...
I a regiser page for eg Customers.
some fields is required .. I used RequiredFieldValidator with each textbox
it's ok
I put save code to insert new record with Submit button .
the thing at the normal that will happen is ,, when i press button and there's some required fileds is empty then nothing happen and RequiredFieldValidator alams me .

the problem : the code of save record is run ..

noteice : I'm sure that I do RequiredFieldValidator as it is

jooooo

Re: Required Fields ?

Not Active27-Mar-08 8:42