Best way to declare a protected set prop for read-only prop - C# Discussion Boards

Kant11-May-03 14:02

11-May-03 14:02

James T. Johnson wrote:
reference my article concerning

By the time you replied, I read that article. Big Grin | :-D

Thx

Don't Beer | [beer]

and drive.

[Serializable()]

Anonymous11-May-03 4:32

Anonymous

11-May-03 4:32

Hey

I have a couple of classes that i use [Serializable()] on to save to file.
This workes fine(on thos objects that not got an Arraylist in it) =)

I got a class that have a ArrayList with alot of strings in its elemnets.

When i load the objekts in to my program, thay is loaded into an array to keeping track of them.

In this objects that is stored in the ARraylist i can see variabels, and here is the information right, but when i loog at the Arraylist in the objects, there is 0 elements, and thats not right.

Any ide how i could get this to work?

I Use this pice of code to read all object from file in to my StorArray
//reading of logg file
if(System.IO.File.Exists(Application.StartupPath + "\\logg.bin"))
{
StreamReader srlogg = new StreamReader(Application.StartupPath + "\\logg.bin",false);
BinaryFormatter bflogg = new BinaryFormatter();
this.logg = (ArrayList)bflogg.Deserialize(srlogg.BaseStream);
srlogg.Close();
}

To save the ARRaylist i use

//Save the logg file
StreamWriter swlogg = new StreamWriter(Application.StartupPath + "\\logg.bin",false);
BinaryFormatter bflogg = new BinaryFormatter();
bf.Serialize(swlogg.BaseStream, this.logg);
swlogg.Close();

Hop it is not to mixup

Best Regards

Jimmy

Re: [Serializable()]

leppie11-May-03 4:56

leppie

11-May-03 4:56

I think I have told you a week or 2 ago, that you should be using a FileStream, NOT a writer! Just passing the BaseStream, can cause unpredictable results.

Anonymous wrote:
In this objects that is stored in the ARraylist i can see variabels, and here is the information right, but when i loog at the Arraylist in the objects, there is 0 elements, and thats not right.

Can rephrase that perhaps? What do you mean here?

Hey leppie! Your "proof" seems brilliant and absurd at the same time. - Vikram Punathambekar 28 Apr '03

Re: [Serializable()]

Anonymous11-May-03 5:28

Anonymous

11-May-03 5:28

Yes i think you told me about the FileStrem for a couple of weeks ago...
But i havent lookt it up... specialy not when writer workes fine, until now.

I have a class(logg), in this class there is some private variabels, and one ArrayList.

In my main program file, i have another ArrayList, this arraylist is storing al the objects from the class(logg).

This Arraylist in the main program file i saves down in Bin filse jusing Serializing()

I whant to remeber that Serializing on a Class with a Arraylist fild with objects is not posible?

When i load in the Objects from file to my main program file, then the Arraylist in the logg class(object) is empty.

Here shod be alot of objects in this Arraylist in the object(logg class)

//

Jimmy

DataView override?

Rocky Moore10-May-03 23:40

Rocky Moore

10-May-03 23:40

For some reason I cannot override EndInit() or Count in DataView. Not quite sure why, Anakrino shows them as public virtuals but VS.NET 2002 errors out saying they are not marked virtual, abstract or override.

Is there something I am just over looking?

Rocky Moore <><

Re: DataView override?

leppie11-May-03 4:36

leppie

11-May-03 4:36

Rocky Moore wrote:
Not quite sure why, Anakrino shows them as public virtuals

You should know better than to trust a decompiler for info like that!

EndInit() is from the ISupportInitialize and that is NOT marked virtual, and Count is never virtual. Anakrino obviously lies to u! Use the object browser or ILDASM rather.

Hey leppie! Your "proof" seems brilliant and absurd at the same time. - Vikram Punathambekar 28 Apr '03

Re: DataView override?

Rocky Moore12-May-03 0:29

Rocky Moore

12-May-03 0:29

leppie wrote:
Anakrino obviously lies to u! Use the object browser or ILDASM rather.

Yeah, I probably should have when straight to he ILDASM but didn't give it a lot of concern when I noticed that browsing the base class in VS.NET 2000 shows the member as overridable also. Figured two different sources wouldn't be wrong... Oppps.. Smile | :)

Rocky Moore <><

Best way to declare a protected set prop for read-only prop

J. Dunlap10-May-03 19:10

J. Dunlap

10-May-03 19:10

What is the proper way to declare a protected set procedure for a read-only property, so that other objects in the same assembly can write as well as read?

I've thought of a couple:

//here's the read-only get procedure:
public object TheProperty
{
   get
   {
   }
}

//set #1
protected object _TheProperty
{
  set
  {
  }
}
  
//#2
protected object theproperty
{
  set
  {
  }
}
  
//#3
protected object pr_TheProperty
{
  set
  {
  }
}
 
//#4
protected void SetTheProperty(object newvalue)
{
}

Which of these would be the best (and feel free to suggest your own Smile | :)

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Re: Best way to declare a protected set prop for read-only prop

leppie11-May-03 4:28

leppie

11-May-03 4:28

jdunlap wrote:
so that other objects in the same assembly can write as well as read?

Use the internal keyword for those variables, in fact you dont even need to have a property for them as you know what you are meant to do with them Smile | :)

Hey leppie! Your "proof" seems brilliant and absurd at the same time. - Vikram Punathambekar 28 Apr '03

Re: Best way to declare a protected set prop for read-only prop

J. Dunlap11-May-03 8:27

J. Dunlap

11-May-03 8:27

I'm doing this for some of them, but others are kept in an inconvenient place and/or the component needs to know when they are changed.

I think I'm going to just decide myself which one to do. Smile | :)

"Do unto others as you would have them do unto you." - Jesus

"An eye for an eye only makes the whole world blind." - Mahatma Gandhi

Where can I find the C# language API.

KBeutler10-May-03 11:30

KBeutler

10-May-03 11:30

I've been using Java SDK for many years and Sun Microsystems had the entire API up for reference. Where can I find this for C#? I looked all over the ms.com site and foudn nothing. thanks!

Re: Where can I find the C# language API.

David Stone10-May-03 12:38

David Stone

10-May-03 12:38

Do you mean the .NET Framework Base Class Library reference? http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netstart/html/cpframeworkref_start.asp

Hawaian shirts and shorts work too in Summer.
People assume you're either a complete nut (in which case not a worthy target) or so damn good you don't need to worry about camouflage...
-Anna-Jayne Metcalfe on Paintballing

Hard disk number

BoudewijnEctor10-May-03 9:33

BoudewijnEctor

10-May-03 9:33

A friend of mine told there's a number on each harddisk; this number is unique. So it can be used to make sure nobody can copy ypur software (the customer needs a hash code from this number to use the softwarer)

Does anyone how to obtain this nuber in C, C++, C# or Java?

Thank you in advance

Re: Hard disk number

jhaga11-May-03 6:07

jhaga

11-May-03 6:07

I have used this sometime:

char VolumeName[200]="";
char FileSystem[50]=""; //FAT, FAT32, NTFS, CDFS, ...DWORD VolumeSerialNumber=0;
DWORD MaxFileName=0;
DWORD dwFileSystem=0;
GetVolumeInformation("c:\\", VolumeName, sizeof(VolumeName), &VolumeSerialNumber, &MaxFileName, &dwFileSystem, FileSystem, sizeof(FileSystem));
CString VolumeSerialNum;VolumeSerialNum.Format("%X",VolumeSerialNumber);VolumeSerialNum= VolumeSerialNum.Left(4) + CString("-") + VolumeSerialNum.Right(4);

jhaga

CodeProject House, Paul Watson wrote:
...and the roar of John Simmons own personal Nascar parked in the garage. Meg flitting about taking photos.Chris having an heated arguement with Colin Davies and .S.Rod. over egian values. Nish manically typing *censur*. Duncan racing around after his pet *c.* Michael Martin and Bryce loudly yelling *c.* C.G. having a fit as Roger Wright loads up *c.* . Anna waving *c.* and Deb scoffing chocolates in the corner.
..Good heavens!

Re: Hard disk number

BoudewijnEctor12-May-03 10:35

BoudewijnEctor

12-May-03 10:35

Thanks for helping me with this C++ implementation,
but I noted yesterday I need a C# version; because I need to implement it in a C# program. Can you help me with this one too?

Thank you in advance

Re: Hard disk number

Bo Hunter12-May-03 14:09

Bo Hunter

12-May-03 14:09

All you have to do is lookup the function name at microsoft
and read the info and use it with [DllImport()] attribute.

This is What I came up with doing a simple search with google.
Click Me

Bo Hunter

Accessing File Properties "Summary "Tab Info

Grant11110-May-03 9:13

Grant111

10-May-03 9:13

When a file entry is right-clicked in Windows Explorer a dialog appears with a minimum of a "General" and a "Summary" tab. The "Summary" tab always contains entries for Title, Subject, Author, Category, Keywords and Comment.

The .NET FileInfo class allows access to name, created date, etc. but not to the properties listed on the "Summary" tab.

How can I get to this "Summary" info with C#??? I don't event need to change it, just access it.

Thanks.

Grant

Re: Accessing File Properties "Summary "Tab Info

Stephane Rodriguez.10-May-03 19:26

Stephane Rodriguez.

10-May-03 19:26

Google "FMTID_SummaryInformation"

AutoScroll ruin GDI

israeli10-May-03 7:25

israeli

10-May-03 7:25

Why is it happen that, when I'm setting the AutoScroll option of the main form to be true, it makes multi copies and dirt of the text I'm writting by using GDI(DrawString method) through the Paint event of the main form on every time I'm scrolling/resizing the window.
I'll be gratefull to receive your help. Cry | :((

Re: AutoScroll ruin GDI

leppie11-May-03 4:32

leppie

11-May-03 4:32

Call Invalidate() after the scrolling/resizing.

Hey leppie! Your "proof" seems brilliant and absurd at the same time. - Vikram Punathambekar 28 Apr '03

Re: AutoScroll ruin GDI

Wesner Moise11-May-03 8:58

Wesner Moise

11-May-03 8:58

I have run into that before... You need to either apply a translation transform or take into account the offsets of AutoScrollPosition. (There is a bug in AutoScrollPosition; the AutoScrollPosition requires a positive value if you set it; but it always returns a negative value when you read it.) Just add the values from AutoScrollPosition to all the coordinates in you Paint routine.

The size of the scrollbars are determined by the bounding area of all the child controls contained within the control. TO change this, you can set AutoScrollMinSize to the actual size you want.

What is happen is that Win32 ScrollWindow (or whatever it is called) is being called, and the invalidated region is then asked to paint itself, but without including the offset position.

In addition to the above, there should be some OnScroll event (I don't remember the name). Try calling Update() within the event to perform realtime updating as you scroll. This removes the redrawing delay that occurs when they user is continually dragging the scrollbar, and defering any paint events from being generated.

Just doing invalidate() doesn't work because it flickers--also, it doesn't take into account the scroll position, so your client area never actually scrolls.

Thanks,
Wes

.NET decompilers

Stephane Rodriguez.10-May-03 5:00

Stephane Rodriguez.

10-May-03 5:00

I wanted to share two important news with you. A new (and free) C# decompiler has been made available by Lutz Roeder. Reflector[^] was in the past "only" showing IL(L) code. Now Reflector embeds a C# decompiler plugin and it comes just as the definitive tool to unmasquerade all those CLR secrets...
Reflector comes even handier than predicted with the use of hyperlinks to navigate through methods within the source code. Amazing!

Anakrino[^] 1.1 has been updated. In fact, only the xml configuration file needs an update. Get it here[^]. Replace the xml file in your Anakrino install folder with this one. Caution : this xml file references paths of the form C:\WINDOWS\... and, as a consequence, you are very likely to have to replace those occurences with C:\WINNT\... Otherwise, Anakrino raises an exception when it starts.

With these tools in hands, it is possible to know how EVERY .NET class is actually implemented.
For native calls, just give a look at rotor.

Re: .NET decompilers

David Stone10-May-03 5:10

David Stone

10-May-03 5:10

Stephane Rodriguez. wrote:
Reflector comes even handier than predicted with the use of hyperlinks to navigate through methods within the source code. Amazing!

Well, if you have a class highlighted in the TreeView, you can hit enter and it'll jump to its base type. Or if you have a method selected, hit enter and it'll jumpt to its return type. And the links were there in the IL as well. Smile | :)

Stephane Rodriguez. wrote:
With these tools in hands, it is possible to know how EVERY .NET class is actually implemented.
For native calls, just give a look at rotor.

I've been looking at Rotor. It's fairly interesting. I've been contemplating installing it so I can program against it. Maybe I'll even install Mono. Big Grin | :-D

Re: .NET decompilers

leppie10-May-03 6:48

leppie

10-May-03 6:48

David Stone wrote:
Maybe I'll even install Mono.

Latest version wont compile on my linux box Frown | :(

Hey leppie! Your "proof" seems brilliant and absurd at the same time. - Vikram Punathambekar 28 Apr '03

Re: .NET decompilers

Nick Parker11-May-03 4:13

Nick Parker

11-May-03 4:13

Stephane Rodriguez. wrote:
has been made available by Lutz Roeder

He's done some really interesting things. Thanks for the FYI.

Stephane Rodriguez. wrote:
With these tools in hands, it is possible to know how EVERY .NET class is actually implemented.

So will you be rewriting everything, just for fun?

-Nick Parker

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.