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Building the string and using WriteAllText is definately simpler.
I don't get the error, because, like I said, it compiled fine here.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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and using WriteAllText is definately simpler..iam not familiar with that..how will be the code look like..?!
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ok i give up ..i really need ur help bro..its apart of my code..where is the wrong ?!
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
namespace graphics_practis
{
///
/// Summary description for Form1.
///
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.PictureBox pictureBox1;
private System.Windows.Forms.Button line;
private System.Windows.Forms.Button square;
private System.Windows.Forms.Button circle;
private System.Windows.Forms.Button ellipse;
private System.Windows.Forms.Button polygon;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button ok;
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem menuItem2;
private System.Windows.Forms.MenuItem menuItem3;
private System.Windows.Forms.MenuItem menuItem4;
private System.Windows.Forms.MenuItem menuItem5;
private BinaryFormatter formtter = new BinaryFormatter();
private FileStream str_reader;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.SaveFileDialog saveFileDialog1;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
///
/// 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
//
dr = new draw(this.pictureBox1);
}
static void Main()
{
Application.Run(new Form1());
}
private void menuItem4_Click(object sender, System.EventArgs e)
{
//saving
FileStream outStream=File.Create(saveFileDialog1.FileName);//To create text file
Stream streamWriter=new StreamWriter(outStream);
}
private void menuItem3_Click(object sender, System.EventArgs e)
{
//opening
FileStream outStream=File.Create(saveFileDialog1.FileName);//To create text file
StreamWriter streamWriter=new StreamWriter(outStream);
}
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Am I going mad? Is there a control just for integer or decimal values?
I have a form that is purely based on "controls" for decimal that result in Un-Editable "controls" as decimal results.
The thing that concerns me is the amount of casting/parsing I am doing. Taking a text entry, parsing to decimal, doing my math then parsing back to decimal again to show in the results box.
There is the numeric up/down control. But can you remove the up/down part of it to use it as a purely numeric control?
Much appreciated
Tony
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No, you can't. You can create a text box derived class that only accepts numbers and encapsulates the parsing, that's as good as it gets.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I have the following string "1100" (or any string of size N with N/2 '1' followed by N/2 '0). I want to make a function that returns all the possible arrangements of "1100" for example:
1100
1010
1001
0110
0101
0011
How would I go about doing this?
I love to program!
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Try This:
create the following functions:
===============================
1.string arraytoString(int [])
This function must combine the array into string.
2.int countOnes(int [])
This function must count the number of "ones" present in the array.
3.int [] convertToBinary(int n,int s)
This function must convert the integer n to its binary equivaling and split them into an array of size s.
Ex: input:8,5 output: {0,1,0,0,0}
4.mainfunction()
{
for(int i=0;i<2<sup>N</sup>;i++)
{
int a[]=convertToBinary(i,N);
if(countOnes(a)==N/2)
print arraytoString(a);
}
}
Regards,
Arun Kumar.A
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Hi,
there is at least one way to generate the strings you want without trying more
combinations and then rejecting the ones that dont fit the constraints.
Lets say we want all the strings containing M ones and M zeroes.
Assume a recursive method that at each level generates zero to MAX zeroes
followed by a single one (hence MAX+1 different strings). If we call this methods
M times (concatenating the output of each recursion level), we will get M ones
and some number of zeroes. By carefully calculating
MAX on each level, we can get exactly M zeroes as well.
So initially MAX equals M. If fewer than M recursions have been executed, recurse
with MAX reduced by the amount of zeroes already emitted; also after M recursions
add the missing zeroes if any.
So for M=2 it would generate in order:
001 1 /
01 01 /
01 1 0
1 001 /
1 01 0
1 1 00
where the first column holds the output of the first level, the second the output
of the second level of recursion, and the third column the added missing zeroes.
When the sequence of zeroes in each level is generated from MAX downto zero zeroes,
the net result is the numbers appear in numerical order.
No trial and error involved !
BTW this is not a C# question at all, it would fit better in math & algos forum !
-- modified at 21:57 Wednesday 25th April, 2007
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Thats great.
Regards,
Arun Kumar.A
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Hi guys, I want to know if there is a way to share a resource file between two C# projects under one solution in VS2005. For instance,
Project1
-Class1.cs
-Class2.cs
-Resource.resx
Project2 - references Project1
-ClassA
Can sombody give me some example or a resouce
Thanks
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You could set up a class in the project with the resource that gets the resources. The second project could use that class to get the resources it needs.
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Can you please provide me some example or a link where I can get it.
Thanks
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Hello,
I have two modes of running my application,
one is UI mode and the other is non UI mode, I have a flag to check whether the operator is in UI or Non- ui mode.,
In non ui mode i try not to show the UI,
private void App_Load(object sender, EventArgs e)
{
if (!m_fUI)
{
//In non ui mode check for the Source mode XML or LDAP
this.Visible = false;
this.ShowInTaskbar = false;
}
}
but as soon as i change the mode the UI goes of and again pops up... Can some pls suggest how to go about?
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I've had the same problem, its somehow due to the way that C# instantiates the form (it always starts visible).
You can't 'hide' the form from the OnLoad event of the form - and the App has to be running before you can hide it.
Two possible solutions (but these might not be the best:
i) Don't create the form in your app entry point, usually program.cs>main actually runs it up.
If you dont need the form code then you should be separating that code out anyway - and the form should be run up as part of your main class'es start up
ii)Set your 'form state' to minimised and set 'show in taskbar' to false - then it wont actually appear anywhere.
This will show up in the ALT-TAB list but one the form is created in main you can then hide it as some later start up code - after the OnLoad event.
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I tried the second option but did not work... can u explain me of the option 1.
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Option 2)
Create your form like normal.
Go to your application main entry point(usually in program.cs ) which should look something like this:
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
And change it to:
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
//Application.Run(frm);
Form1 frm = new Form1();
if (-put your test here-)
{
frm.Show();
}
do
{
System.Windows.Forms.Application.DoEvents();
} while (!frm.IsDisposed);
}
}
Oh, btw while looking for the best way to test the form i also ran across this in the VS2005 MSDN:
"How to: Make a Startup Windows Form Invisible "
ms-help://MS.VSExpressCC.v80/MS.NETFramework.v20.en/dv_mancli/html/98792c58-ec32-4086-8a62-c101c0cc4e88.htm
-- modified at 20:57 Sunday 29th April, 2007
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Hi,
Briefly. FormMain has a single button to spawn Form A. Form A allows to user to do work, submits request to server, upon return auto prints the results.
The problem : After the print, FormMain pops to the top and takes focus, but I want Form A to remain in focus after the print.
FormMain has no functions (that I made) that is called from Form A.
If I step through it in debug mode, focus seems to remain on Form A.
I've tried Focus() and Activate() after the print, but still FormMain takes focus.
Why is this happening and how can I stop it?
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With this explanation, this whole thing seems to be a real mystery, plz give some code to help people get hold of the situation
Rocky
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Please if you know how to copy items between 2 listboxes using a drag and drop operation help me out.
rzvme
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rzvme wrote: to copy items between 2 listboxes using a drag and drop operation help me out
This Google search[^] comes up with some good stuff. First one is here on CP. Hope this helps you out 
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None of the examples I found via googling actually were complete or bug free. Actually getting one to fully work was almost a weeks worth of pain. If I could do it over again, I'd've used a listview since it has more built in drag/drop support. I managed to get a drag/drop demo working with it in under a day with less than a month of language experiance.
--
CleaKO The sad part about this instance is that none of the users ever said anything [about the problem].
Pete O`Hanlon Doesn't that just tell you everything you need to know about users?
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Nish's article code seems to work pretty good. I don't know to what extent the OP is looking for.
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hi
i was create a new instance of thread class and pass to it a method(with 1 parameter) and start then pass it's argument to method by this code :
//my method that get 1 argument
private void ShowWaitForm(string message)<br />
{<br />
Frm_Waiting fw = new Frm_Waiting();<br />
fw.label1.Text = message;<br />
fw.ShowDialog();<br />
}
// error in this line
System.Threading.Thread th = new System.Threading.Thread(this.ShowWaitForm);<br />
th.Start("Please Wait ...");
but the following error show me :
The best overloaded method match for 'System.Threading.Thread.Thread(System.Threading.ThreadStart)' has some invalid arguments
and :
Argument '1': cannot convert from 'method group' to 'System.Threading.ThreadStart'
i was compile and run it without any problem 2 hours ago but now has error,
how to solve my problem ?
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hdv212 wrote: System.Threading.Thread th = new System.Threading.Thread(this.ShowWaitForm);
Change it to
System.Threading.Thread th = new System.Threading.Thread(new System.Threading.ThreadStart(ShowWaitForm));
Tarakeshwar Reddy
MCP, CCIE Q(R&S)
There are two kinds of people, those who do the work and those who take the credit. Try to be in the first group; there is less competition there. - Indira Gandhi
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1. You need to use a ParameterizedThreadStart:
System.Threading.Thread th = new System.Threading.Thread(new System.Threading.ParameterizedThreadStart(this.ShowWaitForm));
This allows your thread to run a Method that takes in a parameter and then start like you have done, but . . .
2. You need to change the interface of ShowWaitForm from
private void ShowWaitForm(string message)
to
private void ShowWaitForm(object message)
The delegate used by the ParameterizedThreadStart object references a function of type void that takes in an object as a parameter. You're giving it a function of type void that takes in a string instead. Once you've gotten this to work just cast the object to a string inside of ShowWaitForm.
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