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using System;
namespace afs
{
class Class1
{
string asdf;
[STAThread]
static void Main(string[] args)
{
asdf="USER ";
}
}
}
OH MY GOD. Have I gone nuts or something??? WHat that hell! Why won't this compile?
/\ |_ E X E GG
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You can not access a instance field
from a static function. You will need
a object referance just like the compiler
tells you when you try to compile it.
Thank You
Bo Hunter
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Complier didn't say anything... I now realize what I did though.
/\ |_ E X E GG
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Because you declared asdf as an instance field and are trying to assign it from a static method without even instantiating Class1 yet. Try adding static before string asdf;.
The compiler error actually should've made this clear.
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Complier didn't say anything... I now realize what I did though.
/\ |_ E X E GG
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Mine said, "An object reference is required for the nonstatic field, method, or property 'WindowsApplication1.Form1.asdf'", both in VS.NET 2002, 2003, and the command-line compiler csc.exe (which VS.NET uses).
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Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
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I swear, it wasn't saying anything... I tried VS and the csc.exe also... However, it seems after I restared... everything is back to normal and the complier is giving me
"An object reference is required for the nonstatic field, method, or property 'WindowsApplication1.Form1.asdf'"
So, I guess that's good. Oh well, whatever.
/\ |_ E X E GG
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I need same help if you could help me!I have to windows aplications one is the Client and the other is the server but i can't change information between them, now i'm using sockets, if sameone could help-me!:].
i don't know if is possibel this way, right now i don't know the right direction for my application, what i want is:
One server that receives a msg from a client application testBox into a label that is in the server
Mario Santos
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Object-based collections may be fine for reference types, but I'm looking for a high-performance collection to store only value types without the boxing/unboxing overhead. Is there anything available to me in the .Net BCL? Or anything on this site that might help me? (already did a search, but might've missed something)
The graveyards are filled with indispensible men.
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Not in the BCL, not until .NET 2.0 when they will be introducing generics in .NET.
For now, you can implement something yourself. Almost all collection-like classes in .NET use an ArrayList because it can grow but it does take an Object which requires boxing value types. ArrayList uses arrays internally, and creates new arrays when necessary and copies elements to the new array. Do the same yourself, but using the value types that you need to collect. Methods like Array.CopyTo make copying elements to the new array easy, and of course creating a new array that's large enough isn't hard. For example, ArrayList.Capacity is the initial capacity (size of the array). When more elements need to be stored, Capacity is doubled and a new array of that size is created. Elements are copied and the old array is disposed (if necessary). You wouldn't have to double, though, it just what the BCL does. You could implement more predictive algorithms if you need to.
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Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
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As always, Heath, your answers are very informative and helpful, thanks. I'll see if I can throw together a home-rolled solution then.
The graveyards are filled with indispensible men.
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i want to respond to keyboard event while the window of my project is inactive
thanks
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Actually, this is conditional...
If you mean your entire application is not the active Window, then using a system hook is best.
If you mean that a dialog in your application has lot focus, but your application still has focus, then you should use an IMessageFilter and register it with Application.AddMessageFilter.
Using system hooks slows down the speed of the entire window manager because your program has to filter and process the necessary data. If you don't NEED to, don't do it.
Also, if you do use a system hook, make sure you unregister it before exiting your application, like in your main window's (i.e., the Form that was run with Application.Run) Close event handler, or better yet in the Dispose override, or before youe application's entry point (i.e., Main) exits.
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Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
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Has someone print in .Net a custom papersize?. I have tried, and the only size that print is the standard size, 8.5" x 11". What do I need to do to change the papersize?
Carlos Eduardo Hernandez P.
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I don't know how to change it. But, was this not answered in the last 24 hours? Click "Search comments" above, i'm pretty sure your answer is there. Good Luck.
/\ |_ E X E GG
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it dindnt. I am just trying to open a new thread so other people can comment on this. It has not work yet.
Carlos Eduardo Hernandez P.
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alright... I put "paper size" in there and found a bunch of stuff...
/\ |_ E X E GG
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- Do not keep posting the same question - we do not like that here and if you didn't get answers the first 1000 times, you probably won't get one at all (but might find more spam in your inbox!)
- What I gave you should work (the link that Mazdak sent you). If it doesn't, you need to reply to that thread and - as I stated in the message - research the problem instead of just guessing and asking other people!
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Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
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Sorry. But I have research enough, and it is not in the .net help, it is, but it doesnt work. Your example and Mazdak'a didnt work also. Maybe you should try what you post. When I help someone in a problem, I tried to help them completly not half way. Thanks.
Carlos Eduardo Hernandez P.
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The examples in the MSDN documentation don't work? I hardly doubt that, because they have been tested and have been in public sight for several years now. I'm sure someone wouldn't noticed and alerted Microsoft, especially since they have such an easy documentation bug link at the bottom!
And as I have sound countless times - post WHY enumerating the PaperSizes didn't work! What exceptions where thrown, if any? It is possible that the printer does not support that paper size! It is, after all, a rather large piece of paper - if the printer tray doesn't support it, it will use the default!
So, write a simple application that enumerates and displays the valid PaperSizes that it supports and see, or debug your code and check the state of objects after lines that don't seem to have an effect.
If you keep asking the same question, you'll get the same answer - so provide us with more details and what exceptions - if any - are being thrown, or example snippets of code showing that you are trying what we have written and where the exception is being thrown. I assure you that enumerating PrinterSettings.PaperSizes works! Tell us why it's not working for you!
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Version: 3.21
GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++
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This is the example I am trying. I am using an Epson LX-300 printer. The enumeration worked, i forgot to tell you that. But my initial question was that I need to create a custom form, and print using that paper size. In this example, I created manually, in Server Properties, in the printer & faxes form, and created the "MIPAPEL" form. When selecting the papersize I use the last element in the enumeration, and it printed the size I wanted, but I created it manually. If I use the new PaperSize("CUSTOM", 8.5*100, 5.5*100) it doesnt work. It seems as it is ignoring my custom size. Also, when doing this, there are no exceptions.
Just create a C# project and copy this.
-Code Start Here-
using System;
using System.Drawing.Printing;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace WindowsApplication1
{
///
/// Summary description for Form1.
///
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(112, 176);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(296, 213);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
PrintDocument pd = new PrintDocument();
string s = "";
// enumerating the valid papers
foreach( PaperSize ps in pd.PrinterSettings.PaperSizes )
{
s += ps.PaperName + "\n";
}
// show the paper sizes defined for the printer
MessageBox.Show(s);
// this is a custom paper size defined manually
// using the dialogs provided on Windows XP
pd.DefaultPageSettings.PaperSize = pd.PrinterSettings.PaperSizes[pd.PrinterSettings.PaperSizes.Count - 1];
pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
pd.QueryPageSettings += new QueryPageSettingsEventHandler(pd_QueryPageSettings);
// printing the document
pd.Print();
}
private void pd_PrintPage(object sender, PrintPageEventArgs e)
{
// printing code goes here.....
e.HasMorePages = false;
}
}
}
Carlos Eduardo Hernandez P.
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