Delegates or objects - C# Discussion Boards

Re: who to get window directory path programatically?

Karavaev Denis10-Dec-02 20:54

10-Dec-02 20:54

Try this:

FileInfo file = new FileInfo(Environment.CurrentDirectory);

all the best,

=====================
http://wasp.elcat.kg

Process?

imran_rafique10-Dec-02 9:37

imran_rafique

10-Dec-02 9:37

i want to start a Process
whose path is on network say

\\imran1\folder1\folder2\some.exe

where imran1 is computer name but when i create an object of Process and called its start method
it did not start the process whoes path is at network only ((i.e path)\\imran1\folder1\folder2\some.exe)
but it sucessfully start the process at local drive and also on those drives that are mapped for network path.

but THE requirement of my application is the common path for each computer of the network

i am using xp prof.i have full permission and if i run this exe manually it execute sucessfully.

i am putting this question second time (one person(thanks for him) has give me the idea of map network drive but could not tell the reason for that)
can any body solve my problem?

r00d0034@yahoo.com

Re: Process?

Rob Graham10-Dec-02 12:50

Rob Graham

10-Dec-02 12:50

I'm not entirely clear on what you are trying to do here, but I suspect that you want this process to run in the other box, not in your local box. I also suspect that when the target exe was on a mapped drive, it ran in your box, rather than on the remote node. If my guesses are correct, then this is not something you can accomplish with a local process object in your box. You will, instead need to use remoting (see the help on System.Remoting namespace). This is a bit more complicated, because what you are describing makes yourr machine the 'client' and all others the 'server' in a remoting scenario. this means you would need some always running 'listener' task on all the remote machines to provide a tcp or udp reciever for the 'run' command, the 'listener' would actually create the process object and start the target.

If you really just want a local process that was started by loading the executable located on the remote computer into local memory, then you would at least have to share the folder on the remote machine, and at least temporarily (net use or the equivalent API call) map it.

If none of this makes sense, then perhaps If you provided some more detail on exactly what you are trying to do and the rational for the "same path" requirement...

Smile | :)

Re: Process?

David Stone10-Dec-02 13:58

David Stone

10-Dec-02 13:58

It's okay Rob. Imran has never fully explained his problems or fully understood explanations and answers. I have learned to give short hints and let him figure it out from there. I would seriously advise you to do the same. You can see the post in my personal forum and follow the link to see what I mean. Smile | :)

I don't know whether it's just the light but I swear the database server gives me dirty looks everytime I wander past.
-Chris Maunder

Microsoft has reinvented the wheel, this time they made it round.
-Peterchen on VS.NET

Re: Process?

Rob Graham10-Dec-02 15:09

Rob Graham

10-Dec-02 15:09

Thanks Dave, I see what you mean... Big Grin | :-D

Re: Process?

imran_rafique11-Dec-02 11:56

imran_rafique

11-Dec-02 11:56

OldROB says
If you really just want a local process that was started by loading the executable located on the remote computer into local memory, then you would at least have to share the folder on the remote machine, and at least temporarily (net use or the equivalent API call) map it.

first of let me say you thanks alot for your ans.
yes i just want a local process that should start by loading the executable located on the remote computer into local memory.
yes i have shared it.but still it did not start.
but i could not understand what do you mean by this sentance of yours.
----------------------------------------------------------
at least temporarily (net use or the equivalent API call) map it.
----------------------------------------------------------
i hope you will be able to ans this.

can you tell me how i will programatically map a network drive for a perticuler folder(it may be local or at network place) ?

r00d0034@yahoo.com

virtual mode?

User 988510-Dec-02 8:05

User 9885

10-Dec-02 8:05

Is virtual mode supported by .NET listview? I found that essential grid from syncfusion supports it, but in that also, there was no method given to change color of the cell based on data, like Custom Draw in common control List Control.

My article on a reference-counted smart pointer that supports polymorphic objects and raw pointers

modified 29-Aug-18 21:01pm.

Delegates or objects

User 988510-Dec-02 7:53

User 9885

10-Dec-02 7:53

I have a class that needs to callback several objects to indicate an event. Is it better to store delegates or the reference to the object itself?

In other words, can delegates be stored in a container and iterated?

My article on a reference-counted smart pointer that supports polymorphic objects and raw pointers

modified 29-Aug-18 21:01pm.

Re: Delegates or objects

leppie10-Dec-02 8:29

leppie

10-Dec-02 8:29

Thomas George wrote:
In other words, can delegates be stored in a container and iterated?

Yes Smile | :)

Here's some code I did in a number solving program:

public NumberSolver(int result, ArrayList numbers)
{
   this.result = result;
   this.numbers = numbers;
   functions = new ArrayList();

   functions.Add( new FunctionHandler( this.Add ));
   functions.Add( new FunctionHandler( this.Subtract ));
   functions.Add( new FunctionHandler( this.Multiply ));
   functions.Add( new FunctionHandler( this.Divide ));
   functions.Add( new FunctionHandler( this.Power ));
}
...
public delegate int FunctionHandler(int a, int b);
...
//in some method, not clear now ;P
int output = numbers[0];
for (int i = 0; i < functions.Count; i++)
{
   FunctionHandler func = (FunctionHandler) functions[i];
   output = func(output, numbers[i + 1]);
}
return output;

Not sure if this is what you meant, but hope it helps Smile | :)

DBHelper - SQL Stored Procedure Wrapper & Typed DataSet Generator for .NET

Re: Delegates or objects

User 988510-Dec-02 9:03

User 9885

10-Dec-02 9:03

Yes it helps Big Grin | :-D

I have the same function implemented in multiple classes, that needs to be notified of an event. So the class which generates the event will hold a container of delegates, one for each class, using add() and remove() functions. When the event is generated, it calls the delegates from the container, and all objects get notified.

Thomas

My article on a reference-counted smart pointer that supports polymorphic objects and raw pointers

modified 29-Aug-18 21:01pm.

Re: Delegates or objects

leppie10-Dec-02 11:27

leppie

10-Dec-02 11:27

Dont you love collections? Smile | :)

DBHelper - SQL Stored Procedure Wrapper & Typed DataSet Generator for .NET

Xml Documentation

afronaut10-Dec-02 7:06

afronaut

10-Dec-02 7:06

is there a way to do this from inside VS? I know how to do it from the command line:

<br />
csc /doc:foo.xml test.cs<br />

but is there a way to do it from the IDE?

*->>Always working on my game, teach me
*->>something new.
cout << "dav1d\n";

Re: Xml Documentation

Not Active10-Dec-02 7:24

Not Active

10-Dec-02 7:24

Project Properties -> Configuration Properties

Add an entry for XML Documentation File

Re: Xml Documentation

Kannan Kalyanaraman10-Dec-02 22:14

Kannan Kalyanaraman

10-Dec-02 22:14

Have you tried ndoc , its extremely cool.
Also there is a option in Tools menu
Tools --> Build Comment Web Pages
option which gives the documentation.
<edit> forgot the link , here it is http://ndoc.sourceforge.net/download.html[^]

Cheers
Kannan

Web Service authentication issue

Craig James10-Dec-02 4:37

Craig James

10-Dec-02 4:37

Hi all,

I have created a Web Service that accesses an MS Access database that is located on another computer. My problem comes when I try to use IIS 'Integrated Windows authentication'.

When I access the web service locally ie "http://localhost/webservice/webservice.asmx" I get access to the web service and when I call a web method it can access the database fine.

However, when I access the web service with "http://xxx.xxx.xxx.xxx/webservice/webservice.asmx" correctly I get the Windows authentication dialog popup and have to enter a valid user id, password, and domain to get access to the web service. But when I attempt to invoke a web method I get an error on trying to connect to the database with the following message:

Microsoft JET Database Engine The Microsoft Jet database engine cannot open the file '\\xxx.xxx.xxx.xxx\directory\DB\DB1.mdb'. It is already opened exclusively by another user, or you need permission to view its data.

The problem is not that someone else is opening the DB but I believe under the windows authentication I am not getting the privelage to access the network.

Any ideas??? Confused | :confused:

Re: Web Service authentication issue

OBRon11-Dec-02 9:58

OBRon

11-Dec-02 9:58

In IIS, your virtual directory is probably logging on as IUSR_MACHINENAME. This account has very little access to your computer. In explorer, go give the IUSR_MACHINENAME account full rights to the directory that the database is located in and I believe your problem will be solved.

OwnderDraw ComboBox

mikasa10-Dec-02 3:27

mikasa

10-Dec-02 3:27

Ok, how can I tell the ComboBox to display the Horizontal Scrollbar in the Drop-Down List if the Items extend past the DropDownWidth of the ComboBox? Since I am custom drawing the Items, it doesn't know that the Item Bounds extend past the DropDownWidth.

Cast an Array to a Treenode Array

Paul Watson10-Dec-02 1:15

Paul Watson

10-Dec-02 1:15

Maybe I have this all wrong, but here goes anyway.

I have two methods, both of which return a plain Array. The Array is one-dimensional and contains strings.

The one method I convert to an object array and that then makes adding it to the ComboBox really simple (just use AddRange.)

The other method though I want to convert to a Treenode Array and then use the AddRange of the treeview control. However I continually get casting errors when trying to cast from Array to Treenode.

So, wise ones, is there a simple way to do it? Or do I have to do a blasted for loop?

Paul Watson
Bluegrass
Cape Town, South Africa

Christopher Duncan wrote:
Which explains why when Santa asked, "And what do you want for Christmas, little boy?" I said, "A life." (Accesories sold separately)

Re: Cast an Array to a Treenode Array

James T. Johnson10-Dec-02 1:28

James T. Johnson

10-Dec-02 1:28

Paul Watson wrote:
The one method I convert to an object array and that then makes adding it to the ComboBox really simple (just use AddRange.)

The ComboBox works by calling ToString() on the objects in the Items collection to get the string it should display (by default, this behavior can be changed by setting the DisplayMember property).

Because the ComboBox works this way you can put add any type of object to the Items collection and it will work (it may not display the string you wanted, but it will at least be displayed).

The TreeView works by using a collection of specialized objects (TreeNode's), since it requires a specific type of object to be in its collection you'll have to convert your string objects to TreeNode objects. In this case it means creating a new TreeNode object and setting the Text property to the string for each string in the array (ie use a blasted for loop; or foreach)

James

- out of order -

Re: Cast an Array to a Treenode Array

Paul Watson10-Dec-02 1:32

Paul Watson

10-Dec-02 1:32

James T. Johnson wrote:
The TreeView works by using a collection of specialized objects (TreeNode's), since it requires a specific type of object to be in its collection you'll have to convert your string objects to TreeNode objects. In this case it means creating a new TreeNode object and setting the Text property to the string for each string in the array (ie use a blasted for loop; or foreach)

Tis what I feared.

Being in overkill mode I think I will subclass the TreeView a bit and add in an overriden AddRange method which can handle just a simple array of string objects. I for one do not always need all the fancy properties of a TreeNode.

Thanks James T. Johnson Smile | :)

Paul Watson
Bluegrass
Cape Town, South Africa

Christopher Duncan wrote:
Which explains why when Santa asked, "And what do you want for Christmas, little boy?" I said, "A life." (Accesories sold separately)

Re: Cast an Array to a Treenode Array

leppie10-Dec-02 8:02

leppie

10-Dec-02 8:02

Paul Watson wrote:
Being in overkill mode I think I will subclass the TreeView a bit and add in an overriden AddRange method which can handle just a simple array of string objects. I for one do not always need all the fancy properties of a TreeNode.

I would just make a static funtion Smile | :)

static TreeNodeCollection MakeNodes(string[] names)
{
  TreeNodeCollection nodes = new TreeNodeCollection();
  foreach (string name in names)
  {
     nodes.Add(name);
  }
  return nodes;
}

static void AddNodes(TreeNode parent, string[] names)
{
  foreach (string name in names)
  {
    parent.Nodes.Add(name);
  }
}

Overriden...derived classes...why? Roll eyes | :rolleyes:

DBHelper - SQL Stored Procedure Wrapper & Typed DataSet Generator for .NET

Re: Cast an Array to a Treenode Array

Paul Watson10-Dec-02 20:39

Paul Watson

10-Dec-02 20:39

leppie wrote:
Overriden...derived classes...why?

I did mention I was in an overkill mood... Big Grin | :-D

Also this kind of thing is something I will probably want to use over and over, makes it easier and more consistent if I have a TreeView control I can just drag on that already has it built in.

Thanks for the code.

Paul Watson
Bluegrass
Cape Town, South Africa

Christopher Duncan wrote:
Which explains why when Santa asked, "And what do you want for Christmas, little boy?" I said, "A life." (Accesories sold separately)

Re: Cast an Array to a Treenode Array

Nick Parker10-Dec-02 4:14

Nick Parker

10-Dec-02 4:14

James T. Johnson wrote:
(ie use a blasted for loop; or foreach)

Were you upset James, your too funny sometimes. Laugh | :laugh:

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Re: Cast an Array to a Treenode Array

James T. Johnson10-Dec-02 8:29

James T. Johnson

10-Dec-02 8:29

Nick Parker wrote:
Were you upset James

Nope, just repeating what Paul said Big Grin | :-D

James

- out of order -

OpenDialog

fredza9-Dec-02 21:36

fredza

9-Dec-02 21:36

Hello,

how to overide the OpenDialog or SaveDialog box, like in VisualStudio Net.
// Maybe drawn all the box ?

Thanks in advance

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