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the 100...00 bit pattern happens to be the only one you can't represent the absolute value of; and lots of run-time libraries don't treat it well, e.g. an sprintf-like function turning a signed integer to its decimal string representation wants to do:
if (value) {
emit('-');
value = -value;
}
which isn't correct, as value may still be negative yielding unexpected quotient/remainder values later on.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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I saw that too. That led me to revisit the two's-complement calculation and I found this[^].
"the universe is twos-complement"
Cheers
I don't like my signature at all
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Hello:
I have a MDIParent Form called ICEPack and many MDIChild Forms. For now I am working on the Forms called FormGeneral and FormProduct. When I get these working, then all the rest will be simple. I have a Class called ClassControl where I put all my Controls.
For example... The TextBox events: In ClassControl. This way all my Forms use the same code.
while (TheControlEvent != null)
{
TheEvent = TheControlEvent.GetType().Name;
switch (TheEvent)
{
#region TextBox
case "TextBox":
TheControlEvent.Enter += new EventHandler(TextBoxEnter);
TheControlEvent.Leave += new EventHandler(TextBoxLeave);
TheControlEvent.MouseHover += new EventHandler(TextBoxMouseHover);
TheControlEvent.MouseLeave += new EventHandler(TextBoxMouseLeave);
break;
#endregion
... other code
Before the 'while' I add the following:
TheForm.Enter += new EventHandler(FormEnter);
So there will be only one routine for all Form Enter.
Currently in the MDIChild I have:
public void FormGeneral_Enter(object sender, EventArgs e)
{
FormICEPack.RunAs = RunAs;
FormICEPack.dataGridViewRecord.DataSource = DataTableRecord;
FormICEPack.dataGridViewRecord.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
}
And would like to put this in the ClassControl:
private void FormEnter(object sender, EventArgs e)
{
// Original code from FormGeneral & FormProduct
//FormICEPack.RunAs = RunAs;
//FormICEPack.dataGridViewRecord.DataSource = DataTableRecord;
//FormICEPack.dataGridViewRecord.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
// New code???
//...
Form TheParentForm = Form.ActiveForm; // Get The Parent Form
TheChildForm = TheParentForm.ActiveMdiChild.Name.ToString(); // Get The Child Form
Assembly oAssembly = Assembly.GetEntryAssembly();
Form oForm = (Form)oAssembly.CreateInstance("ICEPack." + TheChildForm + "()");
String RunAs = (String)oForm.Controls.Find("RunAs", true)[0].ToString(); //<<< ERROR
}
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You can either make the control public (not good practice), or create a public property that returns the value of a control in the form.
.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
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Hello:
If you look at my code... the part that does not work is:
String RunAs = (String)oForm.Controls.Find("RunAs", true)[0].ToString(); // ERROR
Ok, seems you are saying that I should NOT do it this way.
At the point at:
Form TheParentForm = Form.ActiveForm; // Get The Parent Form
TheChildForm = TheParentForm.ActiveMdiChild.Name.ToString(); // Get The Child Form
"TheChildForm" is the good value of the name of the Form. I need to get the value of the string RunAs" in the Form "TheChildForm".
Can you show me an example of code to do it?
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Hello every one.
First of all I am sorry which put this question here, cause it is not relevant to this part. frankly, I couldn't find any proper forum.
I wana write and database application which run on Iphone. I don't know who to start Iphone programming. does any one any article or any experience and help me in this matter.
What do I need to start an Iphone application programming. which environmnet I can write the codes.
Please help me!!!!!
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you would need 10 things: an iPhone, a Mac, intelligence, programming experience, a good command of Objective C, excellent Google fu, one or more good ideas, stamina, perseverance, and time.
If you score less than 5 right now, I suggest you drop the idea.
PS: you wouldn't need C#
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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You forgot luck of the gods and perhaps a small sacrifice to get the app approved. 
I know the language. I've read a book. - _Madmatt
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I didn't want to discourage the chap. 
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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I am trying to add a new feature to my app written in C#.
I have just begun exploring "remoting" as a solution for a particular problem. It looks like quite a learning curve, so I thought I would ask some experts before spending a lot of time and discovering what I want to do is not possible.
Can you "remote" a windows control like the FolderBrowsingDialog? What I want to do is see the dialog on my PC, but actually be browsing folders on the remote PC.
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Remoting is not going to help you with this.
You can use the dialog, if you have access to the system, and browser the UNC path of the machine, \\MySystem. However, if no folders are shared or you don't have access to the roots (\\MySystem\C$), nothing is going to help.
I know the language. I've read a book. - _Madmatt
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If it's the standard File Open dialog, it will allow you to browse machines it can find on the network. If you have the machine name/IP of the machine in question, you can probably send data to that ip/port and any app listening on that port would be able to respond/receive the data you're sending. You may also bup into permissions issues, especially if we're talking about Vista or Weven.
.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
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Perhaps more information would clarify what I am trying to do:
I have a C# server application that runs on a dedicated headless PC at a remote location. Actually 5 of them at different locations. The server monitors specific files in specific shares on other systems on the local LAN. I monitor these servers from a central point. This works great.
The problem:
Sometimes things change on the remote LAN. New systems are added or existing systems are removed. I need to be able to modify the monitoring configuration to add/change/delete the monitored folders as necessary.
From the desktop it would be easy, just use a file FolderBrowsingDialog, find the new system and add "\\NewHost\Share\Folder" to the database. For various reasons I can't use RemoteDesktop so doing this from 200 miles away is problematic...
My first thought was to add a few commands to our communications protocol so I could send a command to the monitoring system to get the network host, then get the shares, then get the folders, etc. In my rough outline this got complicated quickly starting with how do you even get a list of the available hosts on the local LAN... I found some articles, but clearly this is going to be a lot of work for a relatively simple task.
My second thought was remoting. I have never done remoting so again I looked for some examples. Another learning curve but seems less problematic than dealing with manually browsing the network.
The object I would like to remote is the standard FolderBrowsingDialog, like the File Open dialog, but just to pick a folder. I want to have the dialog appear on my screen from my client application, but be browsing the servers LAN 200 miles away.
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This is a logistical nightmare.
Is your application a windows service? I suspect that it is (since the machines are headless), but if not, it should be. The service itself can regularly scan for new shares without explicitly being told to do so. When it detects a new share, it can simply start watching for files in the specified folder (if/when it exists). All that has to happen is that the share needs to be established by the remote admin (or you remotely).
If you don't want it to automatically scan for new shares, you can send it data with the share info, and it can save that info in a data file to be retrieved in the event of a hardware restart.
You could use remoting for that, but I think it would be simpler to just send the info via your existing mechanism.
.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
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I have a class and two form in my project
i want to validate a filed from form1 and use this field's value in form2
but when i want to use it i cant't access to this value becuase every
time that i new ، object from class filed's value was destroyed
how can i do that ?
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I think you need to post some code here.
I'm sure once you do that someone will be able to help you.
In the meanwhile, also check if the singleton pattern can help you in anyway.
My signature "sucks" today
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class class1
{
public int a;
}
form1 :
class1 s=new class1();
s.a=10
form2:
class1 c=new class1();
messageBox.show(c.a.tostring()); // I want to see 10 here
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SajjadZare wrote: I want to see 10 here
only people unfamiliar to object orientation would expect or accept that to happen.
you have two statements containing new class1() which means two objects get created, i.e. two different instantiations of the class1 class. Now if one object is changed, that should not reflect on its siblings. If your house has ten windows and you happen to break one of them, you would not like all of them to break into pieces, would you?
There are a couple of ways to get what you want. They all have one thing in common: they create only one instance of the thing that needs to be accessed at several locations, instead they pass a reference around. And there is a plethora of articles on the subject, maybe this one[^] can help you.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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Because what you are doing is creating two separate instances, you can only do this if there is a single variable "a" that is common to all instances of "class1". You do this with the static keyword.:
class class1
{
public static int a;
}You can then use it in any instance.
form1:
class1 s=new class1();
class1.a=10
form2:
class1 c = new class1();
MessageBox.Show(class1.a.ToString());
But you can't use "s.a" or "c.a" because it would look confusing - you might think that "a" was specific to the particular instance of class1 rather than shared between them.
It's a bit like cars: They can all have a colour, but they don't share it: YourCar has a different colour (blue) to MyCar (red). They do share common information: NumberOfWheels (4)
So you can't say "What colour is a car?" but you can say "How many wheels has a car?"
You can say "What colour is my car?" or "What colour is your car?" because this specifies exactly which car you are talking about.
If you feel you must access "a" via an instance, you can declare a property which does that for you (but it isn't really recommended):
class class1
{
private static int a;
public int A
{
get { return a; }
set { a = value;}
}
}You can now access "A" via "s.A" and "c.A" to get the same value which is shared between all instances of class1.
Did you know:
That by counting the rings on a tree trunk, you can tell how many other trees it has slept with.
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I'm not so sure this is a good suggestion. Maybe what he wants to share deserves to be static and unique, but I didn't get a clue in that direction; simply adding "static" to get something to work is not OK in my books. As I guess you read similar books, maybe I missed something?
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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Oh I agree - static is best reserved for when it is really needed - but since I haven't a clue what he wants to do with it, I didn't want to just leap in with "you can't do it", so I tried to explain a bit as to when you use static. I don't think I have used static for anything other than methods in C# yet - just haven't found the need...
I started writing my response before you posted yours, and saw yours there after I pressed "Post Message". I'm just a slow typist sometimes - especially when the wife is trying to use the internet so I have to stop and sort her out every few minutes.
Did you know:
That by counting the rings on a tree trunk, you can tell how many other trees it has slept with.
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Oh great, blame the wife for giving an overly static/Shared and slow response.
Most of my classes do have a couple of static data members, often for statistical purposes (counting or holding a list of all instances), and for logging parameters. But these are just tools, they don't reflect application-domain properties.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
modified on Friday, June 4, 2010 5:55 PM
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She is a natural VB user - she finds out about a tool, then she uses it for everything.
Everything can be a hammer, if you hit it hard enough...
Did you know:
That by counting the rings on a tree trunk, you can tell how many other trees it has slept with.
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Now it all makes sense; I have fixed my earlier message accordingly.
Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read formatted code with indentation, so please use PRE tags for code snippets.
I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).
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What you need is a static class that can be shared between forms. You can use Session or Application state for this if you are using ASP.NET, however, if the object is large it may not be the best way to handle it.
You can also pass the value you are interested in from form1 to form2 via properties, events, constructors.
I know the language. I've read a book. - _Madmatt
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