Re: Hash Table in C# - C# Discussion Boards

Re: Outlook Add-In using Redemption

HakunaMatada14-Apr-06 1:52

HakunaMatada

14-Apr-06 1:52

_Goose wrote:
Has anyone got any experience using Redemption to access the Outlook address book?

Can't it be done through the Outlook Object Model? I believe the Outlook Object Model exposes a Contacts Interface.

Hope this helps... Smile | :)

---
With best regards,
A Manchester United Fan

The Genius of a true fool is that he can mess up a foolproof plan!

Re: Outlook Add-In using Redemption

_Goose14-Apr-06 2:35

_Goose

14-Apr-06 2:35

It can but you get the security message so it isn't suitable.

Thanks though,

_Goose

-- modified at 8:35 Friday 14th April, 2006

Re: Outlook Add-In using Redemption

HakunaMatada14-Apr-06 2:46

HakunaMatada

14-Apr-06 2:46

_Goose wrote:
It can but you get the security message so it isn't suitable.

Is that the same security message that pops up when an email is sent trough Outlook via code? If yes, then if the original Application object from Onconnection is used, the Security popup doesn't pop up.....

Hope this helps.... Smile | :)

---
With best regards,
A Manchester United Fan

The Genius of a true fool is that he can mess up a foolproof plan!

Re: Outlook Add-In using Redemption

_Goose14-Apr-06 3:16

_Goose

14-Apr-06 3:16

Really? I must try that then, thanks.

_Goose

Color of ListBox Items

rahultaing13-Apr-06 23:36

rahultaing

13-Apr-06 23:36

can anyone tell me some way to set different colors for different Items that I add to my listbox? I am inserting strings into a listbox, but I want them to appear in different colors, how can I do that?

Re: Color of ListBox Items

albCode13-Apr-06 23:45

albCode

13-Apr-06 23:45

Hash Table in C#

rahultaing13-Apr-06 22:30

rahultaing

13-Apr-06 22:30

Is there any Hash Table in C# and if yes then how do we use it? How do we add and how do we look up in hash table?

Re: Hash Table in C#

alexey _N13-Apr-06 22:49

alexey _N

13-Apr-06 22:49

Yes, class Hashtable

<br />
Hashtable hash = new HashTable();<br />
// Adding value.<br />
hash["key"] = 0;<br />
// Getting value.<br />
MessageBox.Show(hash["key"].ToString());<br />

You can also access data through properties "Keys" and "Values".

Best regards, Alexey.

Re: Hash Table in C#

RedhaDev13-Apr-06 23:02

RedhaDev

13-Apr-06 23:02

Hi,
yes of course, by using the "Hashtable" class.

Hashtable myHashTable = new Hashtable(); to instantiate a Hashtable object.
myHashTable.Add("theKey", "theValue"); to add an element
myHashTable["theKey"]...; to retrieve a "value" usig its "key"
myHashTable.Keys; to retrieve the Keys Collection property
and myHashTable.Values; to retrieve the Values Collection property

Regards.

-- modified at 5:03 Friday 14th April, 2006

Re: Hash Table in C#

Bob_Sun13-Apr-06 23:22

Bob_Sun

13-Apr-06 23:22

By the way, you can look up the hashtable by

Hashtable.Contains()
Hashtable.ContainsKey()
Hashtable.ContainsValue

as well.

Re: Hash Table in C#

alexey _N13-Apr-06 23:34

alexey _N

13-Apr-06 23:34

Read this:
Hashtable class

Best regards, Alexey.

Pls its very Urgent ( Dynamic Slide Menu using DataBase)

narendrakumarp13-Apr-06 21:19

narendrakumarp

13-Apr-06 21:19

Hi One & All

This is Naren, I m very new to this environment of .net.
I need some help to create a Dynamic slide menu using database in asp.net web application with c# coding.

So kindly pls give me the suggestions that how to create.

Thanking u ,
Naren

please help me

Re: Pls its very Urgent ( Dynamic Slide Menu using DataBase)

Stefan Troschuetz13-Apr-06 23:47

Stefan Troschuetz

13-Apr-06 23:47

Probably the ASP.NET forum is more appropriate for this question.

www.troschuetz.de

Use windows authentication in client/server application

Le Thanh Cong13-Apr-06 20:35

Le Thanh Cong

13-Apr-06 20:35

I write a application client/server (windows form). Both client & server run in a Active Directory domain. When client connect to server, server will get IP of client. Base on IP, server check current user logon in client PC, determines if the user has been authenticated by Windows.
At client, I can use System.Security.Principal.WindowsIdentity.GetCurrent() to authenticate user but at server, I don't know way authenticate remote user.
In case, what is solution? System.DirectoryService?

conglt

Re: Use windows authentication in client/server application

Dave Kreskowiak14-Apr-06 6:57

Dave Kreskowiak

14-Apr-06 6:57

Ummm, there's no need to check to see if Windows authenticated the person or not. If the authentication failed, that person would not be logged onto Windows, and therefore, there won't be a user logged on.

All you really need to do is on the client side, pass the clients WindowsIdentity (use GetCurrent), to the server. The server will then have everything it needs to know about the user.

Dave Kreskowiak
Microsoft MVP - Visual Basic

About EndInvoke

Bob_Sun13-Apr-06 15:09

Bob_Sun

13-Apr-06 15:09

I happened to find that in the provided libs of my program, many thread are invoked just by BeginInvoke without callback to do EndInvoke. Waht will happen to a thread in ThreadPool if EndInvoke is not all at all?

Asyncs threads invoked by BeingInvoke are used in my program to send event, many I often enfront the problem that some events seem to heave disappeared in the middle of that thread.

I will add EndInvoke code to all these threads. But I hope that I can get some confirmation befrore doing that.

Thank you !

Re: About EndInvoke

Ravi Bhavnani13-Apr-06 15:31

Ravi Bhavnani

13-Apr-06 15:31

As I understand it, EndInvoke() is used to obtain the return value of your delegate method. If your delegate method is of type void, a call to EndInvoke() may not be required. if you haven't already, see this[^] article.

/ravi

My new year's resolution: 2048 x 1536
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Re: About EndInvoke

Bob_Sun13-Apr-06 15:43

Bob_Sun

13-Apr-06 15:43

Thank you very much.

But I was told that BeginInvoke and EndInvoke should be called in pair, otherwise memory leak may happen in program.
I have checked topics on ThreadPool the other day, and I found that threads invoked by BeginInvoke are not so simple.

Re: About EndInvoke

Ravi Bhavnani13-Apr-06 15:50

Ravi Bhavnani

13-Apr-06 15:50

Bob_Sun wrote:
BeginInvoke and EndInvoke should be called in pair,

Hmm, I don't believe that is correct (but could be wrong). See this[^] MSDN article.

/ravi

My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot)com

Re: About EndInvoke

Bob_Sun13-Apr-06 16:02

Bob_Sun

13-Apr-06 16:02

Of cause, I haven't found any such discription in MSDN articles, just on some forum. But the fact is that my program do stop at somethere in the invoked thread (maybe for some other reasons).

As the detail of ThreadPool is not opened completely, now I am considering of writing a ThreadManager of my own, just start a thread by Thread.Start(), if necessary cancel it by Thread.Abort().

Re: About EndInvoke

Bob_Sun13-Apr-06 21:55

Bob_Sun

13-Apr-06 21:55

In the following artical, it says

CAUTION Always call EndInvoke after your asynchronous call completes.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpovrasynchronousprogrammingoverview.asp?frame=true[^]

http://www.interact-sw.co.uk/iangblog/2005/05/16/endinvokerequired[^]

what will happen if EndInvoke is not called?

Thank you!

Re: About EndInvoke

Tehnoon13-Apr-06 22:24

Tehnoon

13-Apr-06 22:24

Rest assured. EndInvoke is ONLYused if your asyncronous method returns something. You call EndInvoke to retrieve that return value, since you can't get the return value in any other way. EndInvoke does not do anything else apart from giving you the return value. If you are not interested in the return value, you do not need to call EndInvoke. I have used BeginInvoke so many times in so many performance critical applications without using EndInvoke, it doesn't create a problem

Re: About EndInvoke

Bob_Sun13-Apr-06 22:55

Bob_Sun

13-Apr-06 22:55

Tehnoon wrote:
I have used BeginInvoke so many times in so many performance critical applications without using EndInvoke, it doesn't create a problem

Thank you for quick reply.

In my case, this is the opposite, it seems to me that the thread invoked by BeginInvoke disappeared half way(only part of the log left). I am not sure whether a background thread will disappear half way if GC.Collect() happens during its process? I am investigating for the reason...

Thank you

Re: About EndInvoke

Daniel Grunwald13-Apr-06 23:14

Daniel Grunwald

13-Apr-06 23:14

delegate.BeginInvoke (creates new thread [from thread-pool]) without delegate.EndInvoke will cause a memory leak.
Control.BeginInvoke ('sends' call to main thread) without Control.EndInvoke is no problem.

Re: About EndInvoke

Bob_Sun13-Apr-06 23:18

Bob_Sun

13-Apr-06 23:18

Daniel Grunwald wrote:
delegate.BeginInvoke (creates new thread [from thread-pool]) without delegate.EndInvoke will cause a memory leak.

I am troubled by threads invoked from ThreadPool.
Can you give me some hint about what the memory leak will bring about?

Thank you.

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