microsoft.public.dotnet.languages.csharp Latest Posts

Dealing with different types of objects in an ArrayList

Fri, 5 Dec 2008 01:57:07 -0800 (PST)

I have a base class Control and a 2 derived classes Control:Control
and ControlEnum:Control.

The reason I have Control and ControlEnum is these classes have a
field called "value" whose type is unknown until runtime. If it's type
is an enum, the enum definition itself isnt known until run time.

So at runtime I am basically doing the following:
1. get type of value
2. if int create Control
if float create Control etc
if enum build "list" of names and values and create ControlEnum
(passing names[] values[] to its ctor)

I initially had the field "value" defined in the base class, but moved
it into the two subclass as I couldnt come up with a way of
dynamically creating an enum and passing it as T to Control.

Now I have an ArrayList of controls and want to be able to access
"value" like so

foreach(control c in controls)
tmp = c.Value

and here I get stuck not knowing what the type of c.Value is!
How do I design the classes to handle this? I am newbie to oops
concepts so any advice would be greatly appreciated. Thanks a lot.

Re: Old version of Reflector doesn't run any more?

Fri, 05 Dec 2008 01:52:57 -0800

On Thu, 04 Dec 2008 22:44:27 -0800, rimblock
wrote:

> Pete,
> I am using the latest version, and i have had no problems with it.

Perhaps I wasn't clear. I'm not having problems with the latest version.
I'm having problems with an earlier version that, for no actual technical
reason, has decided to no longer run.

> You could try reinstalling (i dont know how you achieve this with a
> standalone program, but you can bet there are some registry settings
> somewhere!) and setting your firewall to not allow reflector to
> communicate with the net...

Unfortunately, all I've got installed right now is the XP firewall, which
is really only half a firewall. :)

Disabling the network might help (believe it or not, I haven't tried that
yet), but it's not exactly a practical work-around, even if it does help.

Pete

Re: about DLLs

Fri, 05 Dec 2008 01:48:51 -0800

On Thu, 04 Dec 2008 22:52:15 -0800, venkat wrote:

> is it possible to read or edit a DLL in .net frame work?

In what way?

A DLL is just a file. You can read and edit it the same way you could any
file.

A .NET DLL is managed code. You can load it from a managed code program,
inspect it using Reflection, and probably even recompile it with
modifications.

But I would say that whatever kind of editing you're thinking of, if you
have to ask the question, you may not yet have enough experience to do it
successfully. Whatever "way" in which you want to read or edit the DLL,
it's probably not going to be simple.

Pete

Re: What's a proper way to organize the packages?

Fri, 5 Dec 2008 04:35:54 -0500

On Fri, 5 Dec 2008 09:06:25 +0100
"K Viltersten" wrote:
> Now, Resharper tool claims that i should
> call each project by its name as follows.
>
> namespace Project1{ class Project1{ ... } }
> namespace Project2{ class Project2{ ... } }
>
> Is it really recommended? Can i/should i put
> the namespaces in a common super namespace?

It depends on your project, and what works best for you. For the root
namespace of a project, I usually use something along the lines of:

Company.Solution.Project

.... and of course, break it down into any additional namespaces
necessary, which depends entirely on the project. It's probably best
to not have more than four levels of namespaces in your application, so
Company.Solution.Project as a root namespace gives you enough wiggle
room to divide your project up into one level of namespaces, reasonably
speaking. I suggest four levels just because it tends to be easier to
remember them that way, at least for me.

--- Mike

--
My sigfile ran away and is on hiatus.
http://www.trausch.us/

Re: get the parameters that came with running the progam

Fri, 05 Dec 2008 09:31:44 +0100

Rene schreef:
> Hi,
>
>
> I want to start my (not console) application with HelloWorld.exe /test
> How can i get/read the /test in my application ?
>
> Greetings,
> Rene

Everyone thank u
Yes it is a form application

string[] args = System.Environment.GetCommandLineArgs();

did the trick

Greetings Rene

Re: .NET version for extension methods?

Thu, 04 Dec 2008 23:19:18 -0900

In article ,
Peter Duniho wrote:

> Family Tree Mike wrote:
>
> > That was what I thought too, but got the following when targeting .Net
> > 2.0 or 3.0:
> >
> > Error 1 Cannot define a new extension method because the compiler
> > required type 'System.Runtime.CompilerServices.ExtensionAttribute'
> > cannot be found. Are you missing a reference to System.Core.dll?
-snip-
> Ah. Well, there you go. I guess C# adds an "Extension" attribute to the
> code, which being an actual class has to actually exist.

> I suppose you could define your own version of the attribute and reference
> that instead, but then you might run into trouble trying to run on .NET
> 3.5 (assuming it works at all...I'm not actually sure it would...while it
> seems theoretically possible, I don't care enough to try it :) ).

html>.

It works, I've tried it.

(In my particular case I was trying to do it in VB, where I ran into a
different problem, namely that you can't add extensions to the base
Object class. So I'm left with ugliness).

--
J.B. Moreno

RE: Retrieve time of remote system

v-jzho@online.microsoft.com ("\"Ji Zhou [MSFT]\"") — Fri, 05 Dec 2008 08:11:56 GMT

Hello,

And if you want to use PInvoke to call the native net API, you can use the
NetRemoteTOD function. You can find the NetRemoteTOD document here,
http://msdn.microsoft.com/en-us/library/aa370612(VS.85).aspx

Please let us to know if you have any future questions or concerns on this.
Have a good day!

Best regards,
Ji Zhou (v-jzho@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
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msdnmg@microsoft.com.

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This posting is provided "AS IS" with no warranties, and confers no rights.

What's a proper way to organize the packages?

Fri, 5 Dec 2008 09:06:25 +0100

I have a solution called Solution and in it,
two projects named Project1 and Project2.

I've organized the packages in a common
namespace ComNamSpc. I.e., i have this,
in each of my source code files.

namespace ComNamSpc{ class Project1{ ... } }
namespace ComNamSpc{ class Project2{ ... } }

Now, Resharper tool claims that i should
call each project by its name as follows.

namespace Project1{ class Project1{ ... } }
namespace Project2{ class Project2{ ... } }

Is it really recommended? Can i/should i put
the namespaces in a common super namespace?

--
Kind Regards
Konrad Viltersten
----------------------------------------
May all spammers die an agonizing death;
have no burial places; their souls be
chased by demons in Gehenna from one room
to another for all eternity and beyond.

Console Application

Thu, 4 Dec 2008 23:51:42 -0800 (PST)

Console Application
http://interviewdoor.com/questions%2Dfaqs/viewforum.php?f=39

Windows Services

Thu, 4 Dec 2008 23:40:41 -0800 (PST)

Windows Services
http://interviewdoor.com/questions%2Dfaqs/viewforum.php?f=37

Windows Services

Thu, 4 Dec 2008 23:39:55 -0800 (PST)

Windows Services
http://interviewdoor.com/questions%2Dfaqs/viewforum.php?f=37

Re: Weird ClickOnce error

Thu, 4 Dec 2008 23:28:45 -0800

When you set the target to x86, then your application runs as a 32-bit
application on the 64-bit machine.

When you do the build, do you have it set to "any cpu", or are you changing
it to 32-bit? Try targeting x86 in the properties, but building for "any
cpu", and see if that helps. My guess is that you are building specifically
for x86, and it is trying to install the x86 version of the .Net Framework.

As for why it works on one and not the other, maybe one already has the
framework installed on it.

RobinS.
GoldMail.com

"musosdev" wrote in message
news:6B195724-D407-4914-BE0F-EAD9357AD317@microsoft.com...
> Hi
>
> I've just been playing around with ClickOnce in Visual Studio 2008
> (Publish..). It seems to work however I'm getting some odd behaviour.
>
> My project has been developed on a 64bit platform, but has always been
> targetted for x86. When I've come to "deploy" using ClickOnce, it works
> fine
> on my 64-bit XP machine (same box as development, different partition),
> but
> on another machine (also 64bit) I get the following error during the
> prerequisites check...
>
> "This version of the .NET Framework 2.0 (x86) is not supported on a 64-bit
> operating system. Contact your software vendor"
>
> I don't understand how it works on one machinem, but not another, both
> 64-bit, and both from the same deployment package on the same network
> share.
>
> Any ideas?! Thanks

Check Visibility of Menu Items

Manoj Gamage — Thu, 04 Dec 2008 23:25:50 -0800

Why don't you check the ToolStripMenuItem.Available property. This worked for me. I think this is similar to Visible property

Re: About Garbage Collection

Thu, 4 Dec 2008 23:13:33 -0800 (PST)

On Dec 5, 6:54=A0am, venkat rajesh wrote:
> is Garbage Collection a Process or a thread ?

Neither, really. Garbage collection can happen on any thread which is
allocating memory - if it notices that it can't allocate what it needs
to, it collects the garbage, usually suspending other threads to do so
(modulo concurrent GC).

There is, however, a finalizer thread, which runs finalizers of
objects which aren't referenced but haven't been collected yet.

Jon

Re: Windows Application: Focus MDI Forms by right click

Thu, 4 Dec 2008 23:07:02 -0800 (PST)

here's a somewhat better version, checking first if clicked form is
already active.

simply instanciate below class somewhere in or after mdiparent_load
new MdiRightClickActivate(mdiparent);

******
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

public class MdiRightClickActivate : IMessageFilter
{
Form m_mdiParent;
MdiClient m_mdiClient;
Dictionary m_formList;

const long GW_CHILD = 5;
const long GW_HWNDNEXT = 2;
const long GW_HWNDPREV = 3;

[DllImport("user32")]
static extern int GetWindow(int hWnd, long wCmd);

public MdiRightClickActivate(Form mdiParent)
{
m_mdiParent = mdiParent;
GetMdiClient();
Application.AddMessageFilter(this);
}

Dictionary GetZOrder()
{
Dictionary zorder = new Dictionary
();
BuildFormList();

int nextHwnd = GetWindow((int)m_mdiClient.Handle,
GW_CHILD);
int z = 0;
while (nextHwnd > 0)
{
if (m_formList.ContainsKey(nextHwnd))
{
zorder.Add(z, m_formList[nextHwnd]);
z++;
}
nextHwnd = GetWindow(nextHwnd, GW_HWNDNEXT);
}

return zorder;
}

public bool PreFilterMessage(ref Message m)
{
if (m.Msg == 516)
ActivateCursorForm(Cursor.Position);
return false;
}

void ActivateCursorForm(Point onLocation)
{
Point clientCursorPoint = m_mdiClient.PointToClient
(onLocation);

Form activeForm = (Form) m_mdiParent.ActiveControl;
if (PointIsInForm(activeForm, clientCursorPoint))
return;

foreach (Form form in GetZOrder().Values)
{
if (PointIsInForm(form, clientCursorPoint))
{
form.Activate();
break;
}
}
}

bool PointIsInForm(Form form, Point point)
{
return point.X >= form.Location.X
&& point.X <= form.Location.X + form.Width
&& point.Y >= form.Location.Y
&& point.Y <= form.Location.Y + form.Height;
}

void GetMdiClient()
{
m_mdiClient = null;

foreach (Control control in m_mdiParent.Controls)
{
if (control is MdiClient)
{
m_mdiClient = (MdiClient)control;
break;
}
}
}

void BuildFormList()
{
m_formList = new Dictionary();
foreach (Form form in m_mdiParent.MdiChildren)
m_formList.Add((int)form.Handle, form);
}
}
*****

About Garbage Collection

venkat rajesh — Thu, 04 Dec 2008 22:54:33 -0800

is Garbage Collection a Process or a thread ?

about DLLs

venkat rajesh — Thu, 04 Dec 2008 22:52:15 -0800

is it possible to read or edit a DLL in .net frame work?

Re: Old version of Reflector doesn't run any more?

Thu, 4 Dec 2008 22:44:27 -0800 (PST)

Pete,
I am using the latest version, and i have had no problems with it.
You could try reinstalling (i dont know how you achieve this with a
standalone program, but you can bet there are some registry settings
somewhere!) and setting your firewall to not allow reflector to
communicate with the net...

HTH,
James.

On 5 Dec, 00:15, "Peter Duniho" wrote:
> For the past several months, I have noticed that the version of Reflector=
=A0
> I've been using, downloaded from Roeder's original site, has been =A0
> prompting me to update itself. =A0Being of the general opinion that one =
=A0
> should not update to a new version if the current version is working fine=
, =A0
> I have simply continued to use the version of Reflector that's been =A0
> working for me all this time.
>
> But today, when I tried to run it, after I clicked on the "No" button whe=
n =A0
> it asked me if I wanted to update, it simply quit. =A0It's refusing to ru=
n, =A0
> just because I haven't updated it!
>
> Has anyone else run into this? =A0I'm not fundamentally against switching=
to =A0
> a version downloaded from Red Gate, but it's not clear to me why that =A0
> should be necessary. =A0Did Roeder really code a time-bomb into his =A0
> program? =A0(How rude!) =A0Anyone know of any work-arounds?
>
> Thanks,
> Pete

Re: printDocument class...Form Feed

Fri, 5 Dec 2008 07:44:12 +0100

"Bhavin Parekh" a icrit dans le message de
groupe de discussion : OKwUq0pVJHA.3708@TK2MSFTNGP03.phx.gbl...
> yes, you are right and you help me to clear my doubts..but still finding
> too hard to implement in the code as repeat calls can be made by having
> hasmorepages property through only.
> for e.g., if i have 10 string line variable, and i want to print on 10
> pages, i will need to remember status for each line if its printed or not.
> Also still cant figure out how do i pass the diff data to print page event
> everytime. i guess i will need to check status update for each line in
> printPage Event.

You have to remember status for each line or you can use the proper
container : i'd suggest a Queue that you would fill in the BeginPrint event.

Queue lines = new Queue();

private void pd_BeginPrint(object sender,
System.Drawing.Printing.PrintEventArgs e)
{
lines.Enqueue("line1");
lines.Enqueue("line2");
}

private void pd_PrintPage(object sender,
System.Drawing.Printing.PrintPageEventArgs e)
{
if (lines.Count > 0)
{
string current_line = lines.Dequeue();
e.Graphics.DrawString(current_line, SomeStuffHere...);
}
e.HasMorePages = lines.Count > 0;
}
}

Re: Microsoft Reports w CSharp

Thu, 4 Dec 2008 22:40:11 -0800 (PST)

Its a shot in the dark, but have you tried setting .Filter after you
Refresh?

HTH,
James.

On 5 Dec, 01:10, squeezebot wrote:
> I have a form with a report viewer and a combo box. I'm trying to get
> the report result to "filter" based on the choice in the combo box.
>
> From reading on using data in dot NET, I saw that you could bind a
> control (like the report viewer) to a BindingSource object, while the
> object is bound to the dataset.
>
> Since the BindingSource object has a filter capability, I chose to
> change that and refresh the report, but no filtered results, just the
> original full set of data.
>
> I put a datagridview below the report viewer and bound the grid to the
> BindingSource object.
> When I applied the change from the combo box, the datagridview changed
> (as claimed from article I read) and the results filtered as expected.
>
> Some code:
>
> rptBindingSource.Filter = "pkID_Discipline = " +
> comboBox1.SelectedValue;
> rptViewer.RefreshReport();
>
> The first line causes the datagridview to filter, but not the report.
>
> Any ideas?