C# Discussion Boards - CodeProject

Monty²17-Apr-07 3:47

17-Apr-07 3:47

I have a Usercontrol with a public property List<int> Links

List<int> Links= new List<int>();
public List<int> LinkLabels
{
   get { return Links; }
   set { Links = value; }
}

Now when i put it on a dialog and open the properties dialog in design mode i can click the (...) button and it opens up the add items to collection dialog and i can add a few int(s) to the collection but when i click ok and open it up again all entered values are gone D'Oh! | :doh:

if i set a breakpoint at the set function then the value is empty

any help will be greatly appreciated

-Thanks

Re: UserControl and List

sujithkumarsl17-Apr-07 20:06

sujithkumarsl

17-Apr-07 20:06

can you explain it more with code?
When You are adding items? in runtime or during the design?

My small attempt...

Re: UserControl and List

Monty²17-Apr-07 20:19

Monty²

17-Apr-07 20:19

during design time through the public properties (in properties tab)

C++ where friends have access to your private members !

Solution for those who cares

Monty²17-Apr-07 23:18

Monty²

17-Apr-07 23:18

add

[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]

to the property being exported

C++ where friends have access to your private members !

click once Deployment help needed

pashitech17-Apr-07 3:42

pashitech

17-Apr-07 3:42

hi all,
i want to update my existing windows application using click once,
here i fallowed the necessory steps, but i couldn't control some statements,

i could check wether the application is of clickonce by ApplicationDeployment.IsNetworkDeployed property, but i couldn't able to manage code
i mean i am checking updates manually if its already the higher version i need to desplay in messagebox which i couldn't using the below code...

if (ApplicationDeployment.IsNetworkDeployed) {
ApplicationDeployment CurrentDeploy = ApplicationDeployment.CurrentDeployment;
CurrentDeploy.CheckForUpdateCompleted += OnCheckForUpdateCompleted;
CurrentDeploy.UpdateCompleted += OnUpdateCompleted;

//OnCheckForUpdateCompleted(sender,e);
//OnUpdateCompleted(sender,e);
if (CurrentDeploy.CheckForUpdate())
{
CurrentDeploy.Update();
DialogResult dr = MessageBox.Show("Update Downloaded,Restart the Application", "Application Update", MessageBoxButtons.YesNo);
if (dr == DialogResult.Yes)
{
Application.Restart();
}
}
}
else if(!ApplicationDeployment.IsNetworkDeployed)
{
MessageBox.Show("No Updates are available", "UpDate Info");
}
}

prashanth,
s/w Engineer,
Syfnosys.

DevExpress .NET controls [modified]

Jerry Evans17-Apr-07 3:26

Jerry Evans

17-Apr-07 3:26

Has anyone used this family of controls in anger, esp. the Tree/List widget? I'm especially keen to have multi-column, multi-selection, drag/drop with print/print-preview abilities - and this seems to fit nicely. Anyone got any war stories to share or other products to suggest?

Thx++

Whoops. Here's the URL:

http://www.devexpress.com/Products/NET/WinForms/XtraTreeList/Index.xml

Generic Attributes

Jolly_Coder17-Apr-07 3:09

Jolly_Coder

17-Apr-07 3:09

Does anybody know if it is possible to use generics
in an attribute ?
Example: (what I would like to do)

class MyClass <T>{

[MyAttribute(T == typeof(ClassCase1) ? "Case1" : "Case2")]
private object MyProp{
get{...}
set{...}
}
}

Thanks

May u have a bug free day...

Re: Generic Attributes

Pete O'Hanlon17-Apr-07 3:39

Pete O'Hanlon

17-Apr-07 3:39

Unfortunately you can't reference a generic type parameter in an attribute, so you can't use T == in your attribute.

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

stretching FONT on form control

Priya090217-Apr-07 2:54

Priya0902

17-Apr-07 2:54

i have a custom control which has a magnification property. when we change to 'double width' value, it should stretch the font on the control to double width but the height has to remain the same. similarly i have to stretch the font along y axis when 'double height' is selected for magnification. we cannot separately set the height and width of the FONT. Please help me achieve this.

Thanks
Priya

Problem with update of a listview

henur17-Apr-07 2:51

henur

17-Apr-07 2:51

Hi anyone !

I have some problem with my listview.

I read from database and find 10 items. I add them to listview and listview show 10 items.

So... then I add one item to database and then i read database again, and find 11 items (i checked in debug mode). I add every each to the listview BUT, the listview just shows 10 items. (the one already there).

Whats wrong ???

If i execute in debug mode the problems does not occur. Because it goes slower ?? or what ??

Anyone that have any ideas ?

With Kind Regars

Heino

Re: Problem with update of a listview

Vikram A Punathambekar17-Apr-07 4:51

Vikram A Punathambekar

17-Apr-07 4:51

henur wrote:
then I add one item to database

How are you doing this? Using some other program or manually, using Query Analyzer and the like? Also, are you sure your query is being committed?

Posting the relevant code snippet might be useful.

Cheers,
Vikram.

"But nowadays, it means nothing. Features are never frozen, development keeps happening, bugs never get fixed, and documentation is something you might find on wikipedia."
- Marc Clifton on betas.

Join the CP group at NationStates. Password: byalmightybob

Re: Problem with update of a listview

henur17-Apr-07 8:40

henur

17-Apr-07 8:40

It's done manually. Reading a datareader and adding items by items.

If i execute in debug-mode i see information about every post, even the one that is not added to the listview.

Heino

How to get the System clock change?

Vadim G.17-Apr-07 2:35

Vadim G.

17-Apr-07 2:35

Hi.

I'm handling the event on Windows clock change:

public static EventHandler timeChanged = new EventHandler(OnTimeChanged);

Microsoft.Win32.SystemEvents.TimeChanged += timeChanged;

public static void OnTimeChanged(object sender, EventArgs e)
{
// Do something....
}

Problem: I don't know how to get the part of date that has been changed: days, minutes etc.

Does somebody know how to do it?

Thanks.

Vadim G.

accessing windows share in foreign domain from within webservice

dialsc17-Apr-07 2:33

dialsc

17-Apr-07 2:33

hi there.

i've got a problem. currently i'm developing a .net webservice and i need to access windows network shares from within that webservice. some of the shares are located inside the domain the server is a member of where the webservice runs, some are located on servers which are members of foreign domains where the domain the webservice server belongs to has no security trust, thus it is a foreign domain.

i'm unable to figure out how to parse the credentials to the directory- and/or fileInfo objects when creating them using the uncPath to the share(s). i tried impersonation which works well for accessing shares within the same domain the webservice server belongs to, but not for the domain it does not belong to.

i think the problem is, that the underlaying implementation of the impersonation class i use - advapi32.dll - does not know the domain controler(s) it should use to authenticate the credentials i use for the impersonation.

maybee im wrong with this thinkings... Wink | ;)

PLZ, can anyone help me with this problem? its realy urgent, i need to get this working!

thank you very much,

dialsc

C# navigation and tracking draw objects

instalator17-Apr-07 2:29

instalator

17-Apr-07 2:29

Hello..

i'm beginner in c# and have problems with implementing some things in my project...

i need to draw circle (ellipse) as car and different roads (from couple segments) on some map
and to be able to peek a road and navigate such car on this road and also noise if the car gets out from the road... something like this..

I tried to read some good articles here.. but i missed the main idea of such design and also do i need directx?

Thanks for any help...

Shimon

C++ to C#

Stevo Z17-Apr-07 1:11

Stevo Z

17-Apr-07 1:11

Hi,

I'm creating a COM object single dll server in C++, which will be used in managed code, in C#. I'm having a little trouble with types . I need to declare method wich will have one input argument and one output argument, both of string type (in C#). Now I work with arguments :

C++
HRESULT Method([in] unsigned char const* source, [out, retval] unsigned char* output);

which are (in C#) converted to :

byte Method(ref byte source);

1. what kind of declaration I need in C++, so it would be transformed to string Method(string source) (in C#);

2. How to convert that kind to char* (in C++).

thanks

Re: C++ to C#

sthotakura17-Apr-07 7:52

sthotakura

17-Apr-07 7:52

try BSTR type.

overload operator++ for a struct

peterchen17-Apr-07 0:18

peterchen

17-Apr-07 0:18

Idea - what I want to do:

<br />
struct AtomicInt<br />
{<br />
   Int32 m_value;<br />
   public static int operator++(ref AtomicInt ai) { Interlocked.Increment(ai.m_value); });<br />
}<br />

operator ++ has to modify the struct itself, but ref doesn't seem to be allowed for operators. So I either have toi make AtomicInt a class (sucks), or I can't provide a meaningful overload for operator ++ - or am I missing something?

We are a big screwed up dysfunctional psychotic happy family - some more screwed up, others more happy, but everybody's psychotic joint venture definition of CP
My first real C# project | Linkify!|FoldWithUs! | sighist

Re: overload operator++ for a struct

mabo4217-Apr-07 0:42

mabo42

17-Apr-07 0:42

This works for me:

public struct AtomicInt
{
  Int32 m_value;
  public static AtomicInt operator++ (AtomicInt ai) 
  { 
    Interlocked.Increment(ref ai.m_value);
    return ai;
  }
    
  public override string ToString()
  {
    return m_value.ToString();
  }
}

...

AtomicInt ai = new AtomicInt();

Console.WriteLine(ai);    // ->0
Console.WriteLine(++ai);  // ->1
Console.WriteLine(ai++);  // ->1
Console.WriteLine(ai);    // ->2

Hope this helps.

Re: overload operator++ for a struct

peterchen17-Apr-07 2:37

peterchen

17-Apr-07 2:37

ah yes, that's probably how it's intended to work, but that defeats the purpose Frown | :(

Re: overload operator++ for a struct

mabo4217-Apr-07 2:58

mabo42

17-Apr-07 2:58

Ok, then perhaps this is saver:

public struct AtomicInt
{  
  Int32 m_value;  
  
  public AtomicInt(Int32 value)
  {
    m_value = value;
  }
  
  public static AtomicInt operator++ (AtomicInt ai)   
  {     
    int i = Interlocked.Increment(ref ai.m_value);
    return new AtomicInt(i);  
  }
  
  public override string ToString()  
  {    
    return m_value.ToString();  
  }
}

Re: overload operator++ for a struct

peterchen17-Apr-07 4:18

peterchen

17-Apr-07 4:18

I'm still not sure if this is handled correctly internally.

As I guess, what the IL really does is

AtomicInt x; <br />
++x;<br />

==>

<br />
AtomicInt x;<br />
x = AtmicInt.op_Increment(x);<br />

which wouldn#t work as intended. I guess I should check with reflector.

Re: overload operator++ for a struct

mabo4217-Apr-07 4:29

mabo42

17-Apr-07 4:29

I assume, that's correct, but then you have to protect the Increment operation (e.g. per lock on any object) outside of the structs code, and this is not what you want ...

Re: overload operator++ for a struct

Guffa17-Apr-07 3:56

Guffa

17-Apr-07 3:56

A struct should generally be immutable, so perhaps you should make it a class after all.

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

Re: overload operator++ for a struct

mabo4217-Apr-07 4:12

mabo42

17-Apr-07 4:12

Guffa wrote:
A struct should generally be immutable

But the inbuild structs are also not, eg: Rectangle.Offset()

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