how to initiate a class stored in string variable - C# Discussion Boards

nhathoang3-Aug-07 4:04

3-Aug-07 4:04

I have a phare of source:
InitializeComponent();
String []Nhat=Directory.GetDirectories(Directory.GetCurrentDirectory());
String Nht = Nhat[0];

when I debug,no happen,but when I run the progam,a dialogue display and require me to close dialogue,why I don't undersand

Re: A error is difficult to understand

Colin Angus Mackay3-Aug-07 4:11

Colin Angus Mackay

3-Aug-07 4:11

I don't understand.

What should happen?

What actually happens?

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Re: A error is difficult to understand

Pete O'Hanlon3-Aug-07 4:14

Pete O'Hanlon

3-Aug-07 4:14

You are making an assumption in the line String Nht = Nhat[0] that you actually have an entry. Before you do this, you need to make sure that Nhat actually has entries in it.

Deja View - the feeling that you've seen this post before.

Re: A error is difficult to understand

nhathoang3-Aug-07 4:18

nhathoang

3-Aug-07 4:18

but why when I debug,Nhat[] have contained data( data is a String)

Re: A error is difficult to understand

Pete O'Hanlon3-Aug-07 4:29

Pete O'Hanlon

3-Aug-07 4:29

Because you are using GetCurrentDirectory. Here's a hint - pop up a message box to say what GetCurrentDirectory contains in the release version.

Deja View - the feeling that you've seen this post before.

Re: A error is difficult to understand

nhathoang3-Aug-07 7:35

nhathoang

3-Aug-07 7:35

That is right,thanks

Re: A error is difficult to understand

Luc Pattyn3-Aug-07 5:56

Luc Pattyn

3-Aug-07 5:56

Whatever happens, don't give us any details.
If a dialog box tells you something, don't tell us.
If an Exception fires, don't reveal its message.
If you did, we might be able to help you; that can not be what you want...

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

how to initiate a class stored in string variable

Asif Rehman3-Aug-07 3:32

Asif Rehman

3-Aug-07 3:32

I know its a silly ques.

I've got treeview control which holds different class names.

In normal ways what we do is.

Ayclass cls= new AnyClass();

now the AnyClass's name is stored in a variable. how to instantiate a class.

here's the failed code.

string varClass= treeview1.node.ToString();
varclass d= new varClass();

Hope I make myself clarify.

Re: how to initiate a class stored in string variable

Guffa3-Aug-07 3:36

Guffa

3-Aug-07 3:36

Normally you don't do this at all. It's possible using reflection, but having to use reflection is usually an indication that you are doing something backwards.

What is it that you are trying to accomplish, really? You should ask for a solution for that, instead of asking about the way that you think that it's solved.

---
single minded; short sighted; long gone;

Re: how to initiate a class stored in string variable

Urs Enzler3-Aug-07 3:58

Urs Enzler

3-Aug-07 3:58

If you are sure that's the way to go (see post from Guffa) then this is how it's working:

object d = Activator.CreateInstance(Type.GetType(typeName));

see help on CreateInstance for further information.

-^-^-^-^-^-
no risk no funk

Re: how to initiate a class stored in string variable

Asif Rehman3-Aug-07 4:31

Asif Rehman

3-Aug-07 4:31

here's what I want.

here's chart reports in treeview control for end user to display.
Sales_Monthwise
Sales_Citywise
sales_PartyWise

when a user clicks Sales_Monthwise I want open Charting Class with the same name.
one possible way is:

if (treeview.node.text == "Sales_MonthWise) {
	Sales_Monthwise sm= new Sales_Monthwise();
	sm.Show();
}

bcoz there are so many classes I don't want to insert logic for every class.

Re: how to initiate a class stored in string variable

CiNN3-Aug-07 7:55

CiNN

3-Aug-07 7:55

Use an Interface

What is Threading ?

Chintan.Desai3-Aug-07 2:49

Chintan.Desai

3-Aug-07 2:49

Hi all,

Can i get some notes or some article link on .NET Threading.

Thank You,

Regards
Chintan
www.visharadsoft.com
(Nothing is so purify as KNOWLEDGE)

Re: What is Threading ?

originSH3-Aug-07 2:55

originSH

3-Aug-07 2:55

I'll let you in on a secret (I know its a secret because it seems theres a lot of people who don't use it before asking here), theres a wonderful site called google[^].

Re: What is Threading ?

Joseph Guadagno3-Aug-07 3:28

Joseph Guadagno

3-Aug-07 3:28

There is a pretty good article on CodeProject that covers different Threading scenarios...

http://www.codeproject.com/cs/threads/workqueuethreading.asp

Here are some of my articles.
Hope this helps!
Joseph Guadagno
http://www.josephguadagno.net

Re: What is Threading ?

Talal Sultan3-Aug-07 3:55

Talal Sultan

3-Aug-07 3:55

Now you ruined it! That was supposed to be THE secret! Laugh | :laugh:

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."
--Rich Cook

Re: What is Threading ?

Ravi Bhavnani3-Aug-07 3:29

Ravi Bhavnani

3-Aug-07 3:29

See this[^] article.

/ravi

This is your brain on Celcius
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Re: What is Threading ?

Luc Pattyn3-Aug-07 5:59

Luc Pattyn

3-Aug-07 5:59

I'll let you in on the biggest secret of all (I know its a big secret because
it seems only few people are aware of it): there is a Search box on top of almost
every page on CodeProject.

Don't use it; if you do, you may run out of simple questions to ask us.

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

problem with form show dialog

justintimberlake3-Aug-07 2:45

justintimberlake

3-Aug-07 2:45

i have a main form which contains 5 tab pages in each tab page i have a list view. now if i open another form from main form using childform.showdialog() and then i close the child form then the main form flickers, i dont know why? but if i open the same child form from main form using childfrom.show() then close it the main form doest flicker but the show method allows multiple instance of child form which is not so in showdialog(). Now what should i do in order to open single instance of child form and not flicker the main form when the child form closes.
thank you

Re: problem with form show dialog

V.3-Aug-07 2:52

3-Aug-07 2:52

I believe there is a property "DoubleBuffering" or something in the forms properties.
Set it to true. Maybe that helps.

V.
I found a living worth working for, but haven't found work worth living for.

Simple addin for Word 2003

John Reinhold3-Aug-07 2:24

John Reinhold

3-Aug-07 2:24

Hi There

I need help to get started making a simple addin for Word. I need to add a command in menu that appears when I right clicks, so I can execute some of my own code.

I'm tryin to do so using VS2005 (C#) and VSTO2005. But I can't find any samples that leads my in the correct direction.

Can anyone helt me, please?

__________________
John Reinhold - DK

Re: Simple addin for Word 2003

Chintan.Desai3-Aug-07 2:42

Chintan.Desai

3-Aug-07 2:42

use ContextMenu. assign some text as menu in it.Now there is one property in form class.so assign Context menu name in its Context menu property.

u r done!! Rose | [Rose]

Regards
Chintan
www.visharadsoft.com
(Nothing is so purify as KNOWLEDGE)

Re: Simple addin for Word 2003

John Reinhold3-Aug-07 2:50

John Reinhold

3-Aug-07 2:50

Whau - that was fast!

Thanx, Chintan.

What you wrote is in a very short form. Unfortunateliy, I'm learning as I go. Do you know where I can get a complete sample solution showing how do to?

__________________
John Reinhold - DK

String Builder

ramdil3-Aug-07 1:27

ramdil

3-Aug-07 1:27

Hi all.
I have an application which will recieve ids from some other application.
Now i need to store the incoming ids to a string builder, so that i can use it for later use.For this i have created a string builder as follows
stringbuilder strIncomingEventID=new stringBuilder()
and inside the receiving method i used the below stmts

strIncomingEventID.Append(incomingmessage + Convert.ToChar(FIELD_SEP) )
now i want to retrieve each ids from it..for my manipulation...
i am not getting split properties or any thing which is useful..can any one help me in this .One more thing is that i am appending a constant FIELD_SEP to end of incoming message when i store , so that when i want to retrieve the ids ,it will be useful..is it right method.Please advise me how to get the value from the string builder

Thanks in advance

Regards
DilipRam

Re: String Builder

Malcolm Smart3-Aug-07 1:33

Malcolm Smart

3-Aug-07 1:33

Can't you store the IDs in a List<string> as they come in. YOu then have a list of IDs and can use this to build your string for storage at teh end.

"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF

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