Creating a Class that can be a list? - C# Discussion Boards

Luc Pattyn29-Dec-09 5:20

29-Dec-09 5:20

Hi,

I don't see anything that is fundamentally wrong.
I never used GetPrivateProfileString myself.

However:
- I would drop the "SetLastError = true" part, as I don't see anything about GetLastError in the MSDN documentation here[^]
- I trust your filename is ...BiblioSelfCheckDefault.ini not .uni

Hope this helps.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

Merry Christmas and a Happy New Year to all.

Re: Reading in Unicode text

elmernite29-Dec-09 5:56

elmernite

29-Dec-09 5:56

I dropped the "SetLastError" part, still the same results.
Actually the file is .uni not .ini, which as far as I can tell, .uni is simply an .ini file the denotes it can handle Unicode.

I guess I can manually sort through the uni/ini file and access the text that way and maybe it will be in proper unicode.
Thanks for the assistance!

-Elmernite

C# and Open Gl

awaistariq28-Dec-09 7:44

awaistariq

28-Dec-09 7:44

hi guz.

i wonder how can i use open gl with C# 08 express edition...
Plz rply me as soon as possible as i hav to submit a project related to these befor 8th jan,2010.
Awais

Message Closed

28-Dec-09 7:51

stancrm

28-Dec-09 7:51

Message Closed

modified 23-Nov-14 7:14am.

Re: C# and Open Gl

harold aptroot28-Dec-09 8:54

harold aptroot

28-Dec-09 8:54

That's really really old and quite buggy, better use the Tao Framework[^] these days (though it also seems quite dead now)

Re: C# and Open Gl

#realJSOP28-Dec-09 9:41

#realJSOP

28-Dec-09 9:41

Forget about OpenGL, and use SlimDX.

.45 ACP - because shooting twice is just silly
-----
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"The staggering layers of obscenity in your statement make it a work of art on so many levels." - J. Jystad, 2001

Registry

sanforjackass28-Dec-09 7:39

sanforjackass

28-Dec-09 7:39

is there like file watcher for registry

Creating a Class that can be a list?

bbranded28-Dec-09 5:20

bbranded

28-Dec-09 5:20

Hello,

I'm a little lost as to how to write a class that will take in arguments from the .Add function of a List<>.

With reference to this thread, I have written the following class.

public class SnapShot
   {
       private DateTime m_SnapShotDateTime;

       public DateTime SnapShotDateTime
       {
           get
           {
               return m_SnapShotDateTime;
           }
           set
           {
               m_SnapShotDateTime = value;
           }

       }

       private long m_BPSAverage;

       public long BPSAverage
       {
           get
           {
               return m_BPSAverage;
           }
           set
           {
               m_BPSAverage = value;
           }
       }

       public SnapShot(DateTime snapshotdatetime, long bpsaverage)
       {
           m_SnapShotDateTime = snapshotdatetime;
           m_BPSAverage = bpsaverage;
       }

   }

I have created a List and would like to use the .Add function to add "entries" for .SnapShot(DateTime snapshotdatetime, long bpsaverage).

SnapShot LiveSnapshot;
List<SnapShot> LiveSnapshotList = new List<SnapShot>();

//LiveSnapshotList.Add();

How do I properly write the class so that it handles the .Add function of the List? Or should I be calling .Add with some other overload value?

Thanks,

Matt

Re: Creating a Class that can be a list?

Luc Pattyn28-Dec-09 5:37

Luc Pattyn

28-Dec-09 5:37

Hi,

1.
you don't need to create a special list class, a simple:

List<SnapShot> snapShots=new List<SnapShot>();
SnapShot snap=new SnapShot(...);
snapShots.Add(snap);
...
List<SnapShot> moreSnapShots=new List<SnapShot>();
moreSnapShots.Add(...);
snapShots.Add(moreSnapShots);

would work just fine.

2.
And you could make that slightly more user-friendly with an almost empty class like this:

class SnapShotList : List<SnapShot> {}

SnapShotList snapShots=new SnapShotList();
SnapShot snap=new SnapShot(...);
snapShots.Add(snap);
...
SnapShotList moreSnapShots=new SnapShotList();
moreSnapShots.Add(...);
snapShots.Add(moreSnapShots);

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

Merry Christmas and a Happy New Year to all.

Re: Creating a Class that can be a list?

bbranded28-Dec-09 5:40

bbranded

28-Dec-09 5:40

Thanks very much Luc. I will take a look into this.

As for snap, this is of the type SnapShot as defined via the SnapShot class's SnapShot function?

Thanks,

Matt

Re: Creating a Class that can be a list?

Luc Pattyn28-Dec-09 7:13

Luc Pattyn

28-Dec-09 7:13

bbranded wrote:
as defined via the SnapShot class's SnapShot function?

yes.
however functions are passé, you should call them methods now; unless they are constructors!

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

Merry Christmas and a Happy New Year to all.

Re: Creating a Class that can be a list?

DaveyM6928-Dec-09 10:23

DaveyM69

28-Dec-09 10:23

5ed

Dave

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Creating a Class that can be a list?

ProtoBytes28-Dec-09 12:14

ProtoBytes

28-Dec-09 12:14

Haha! What do you call a Lambda Then Luc?

Re: Creating a Class that can be a list?

Luc Pattyn28-Dec-09 12:19

Luc Pattyn

28-Dec-09 12:19

I'm afraid I can't answer that on a public forum. Blush | :O

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

Merry Christmas and a Happy New Year to all.

Re: Creating a Class that can be a list?

Saksida Bojan28-Dec-09 5:37

Saksida Bojan

28-Dec-09 5:37

bbranded wrote:
I'm a little lost as to how to write a class that will take in arguments from the .Add function of a List<>.

If you use List, then do not handle .Add, because it is implemented. As your example you incorrectly defined List.

List<SnapShot > LiveSnapshot = new List<SnapShot>();

Re: Creating a Class that can be a list?

#realJSOP28-Dec-09 9:44

#realJSOP

28-Dec-09 9:44

public class SnapShotList : List<SnapShot> {}

Then you can do this:

SnapShotList snapshots = new SnapShotList();

As a result, you get all of the benefits of having a list (including all of the methods therein) in a conveniently named object, and you can add specific custom behavior to your class to handle circumstances ragarding the items in the list. I do it all the time.

Few questions

Saksida Bojan28-Dec-09 5:04

Saksida Bojan

28-Dec-09 5:04

I am developing a Custom Control and I will ask question from several categories. I appreciate your answers

1st question:
How can I create a class to be used like XmlNode. XmlNode can be XmlElement or other types. I wan't to use similar approach. I need it, because I want draw other type of controls within one control.

Example:
Display a Group box with a picture and a button as an item in TreeView

2nd Question:
My Control is Inherits Control class. How can I hide some properties and/or change its description.

Thank you for your time.

Re: Few questions

ProtoBytes28-Dec-09 6:48

ProtoBytes

28-Dec-09 6:48

Saksida Bojan wrote:
1st question:
How can I create a class to be used like XmlNode. XmlNode can be XmlElement or other types. I want to use similar approach. I need it, because I want draw other type of controls within one control.

Okay, well then create a simple interface for your object and have a toString method that can convert it to the correct output. Look at the XML classes and interfaces, they all share a common.

Saksida Bojan wrote:
Example:
Display a Group box with a picture and a button as an item in TreeView

This is more complex. You would have to use some kind of logic to display the node as such. HTML/WPF/SilverLight/WinForms all do it differently. Look for some examples on:

Creating User Controls.

Saksida Bojan wrote:
2nd Question:
My Control is Inherits Control class. How can I hide some properties and/or change its description.

In the designer. All properties are visible. You can change them there, there will be somethings you can't hide or change depending on the inheritance of the object/control.

Question: What are you creating the control in? WPF?

Re: Few questions

Saksida Bojan28-Dec-09 8:50

Saksida Bojan

28-Dec-09 8:50

TheArchitectmc∞ wrote:
Okay, well then create a simple interface for your object and have a toString method that can convert it to the correct output. Look at the XML classes and interfaces, they all share a common.

Will look at it. If I coudn't use, then I would use Object, but I would rather avoid Object

TheArchitectmc∞ wrote:
This is more complex. You would have to use some kind of logic to display the node as such. HTML/WPF/SilverLight/WinForms all do it differently.

I have already thought on how to handle it

TheArchitectmc∞ wrote:
Look for some examples on:
Creating User Controls.

I have read a Book about creating Custom control, however i need data layer that behaves like XmlNode. I will look at the interface.

TheArchitectmc∞ wrote:
Question: What are you creating the control in? WPF?

I am desinging for windows form

Re: Few questions

ProtoBytes28-Dec-09 9:15

ProtoBytes

28-Dec-09 9:15

Saksida Bojan wrote:
I am desinging for windows form

Okay if you are designing for windows forms, then this has sort of been done for you in the WPF implementation of Windows Forms.

Create a WPF application, add WinForms to the project, it appears as a button in the widget box.

Saksida Bojan wrote:
I have read a Book about creating Custom control, however i need data layer that behaves like XmlNode. I will look at the interface.

There are many way of representing data as an XML node. Many converrters in the .NET runtime. Take a look at LINQ to SQL, LINQ to XML, and LINQ to Objects. There are ways to easily use SQL as XML, Object as XML.

Saksida Bojan wrote:
Will look at it. If I coudn't use, then I would use Object, but I would rather avoid Object

Another approach to to directly inherit from XMLNode or what ever works for you. I would make sure that it is a basic enough object which can also be used in other assemblies in the .NET runtime.

Re: Few questions

DaveyM6928-Dec-09 10:42

DaveyM69

28-Dec-09 10:42

1. You can either use an interface or an abstract class depending on what suits your needs best.

2. This is possible by creating new properties the same as the old and applying certain attributes (overriding instead of new may work - I seem to recall having problems that way). The control will need to be compiled to a separate assembly, if in the same assembly as the project, or in a referenced project then the attributes will have no effect!

public class MyControl : Control
{
    [Browsable(false),
    DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden),
    EditorBrowsable(EditorBrowsableState.Never),
    ObsoleteAttribute("This property is not valid for this control")]
    public new string Text
    {
        get { return base.Text; }
        set { base.Text = value; }
    }
}

This isn't foolproof though as the end user can always treat your control as Control and have access to all the stuff that Control has. It's also against OOP priciples to inherit stuff you don't want, but in the case of Control there isn't much option and even MS themselves do it!

Dave

BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Few questions

Saksida Bojan28-Dec-09 11:33

Saksida Bojan

28-Dec-09 11:33

thanks for info. Gonna need to look into abstract, because i do not know what it is.

Re: Few questions

ProtoBytes28-Dec-09 12:12

ProtoBytes

28-Dec-09 12:12

An abstract class is a bottom level class in the class hierarchy which can not be instantiated. So if you are using inheritance you won't be able to use abstract classes.

The attributes solution is a good hack to keep the user from using something you don't want them to use.

Network permission for Windows service

Priya Prk28-Dec-09 4:56

Priya Prk

28-Dec-09 4:56

Hi All,

I have a Windows service that suppose to write in a file in a shared network drive.
Bud im getting this error:

System.UnauthorizedAccessException: Access to the path '\\Pc001\test\test.txt' is denied.

How can i fix this ?

Thanks

Re: Network permission for Windows service

Blikkies28-Dec-09 5:33

Blikkies

28-Dec-09 5:33

You have to give wright permissions to the shared folder.

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