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in win application we don`t use console and this syntax does not help,for example:
textbox1.text=string.format("{0:n2}", variable);
and the textbox1 shows: 0.00
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Or simply use
Math.Round(floatvalue,2);
Sujith
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float f=2.37037E-08
Math.Round(f, 2);
textbox1.Text = f.ToString();
still the same problem and the textbox shows 2.37037E-08
 
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hi
how to copy folders ??
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I'm not sure if there's a Directory.Copy, I don't think so. I suspect you need to create the folder and copy the files recursively.
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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Hi,
There is no direct methods available to Copy a folder as such in C#. You have to itrate the entire source folder and then you have to copy individual File.
Thanks
Balaji
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Hi All,
I am tring to call a paint event with a timer so that the points change depending on the location. I am going to have a for loop that incrementally changes the X location. So I am not sure quite how to do this. This is my paint code:
<br />
private void PictureBox1_Paint(object sender, PaintEventArgs e)<br />
{<br />
Filtered_Tilt f = new Filtered_Tilt();<br />
Graphics g = e.Graphics;<br />
Size ballsize = new Size(30, 30);<br />
Rectangle r = new Rectangle(f.front, ballsize);<br />
Pen p = new Pen(Color.Blue, 4);<br />
front.X = f.x;<br />
front.Y = f.y;<br />
g.DrawEllipse(p, r);<br />
}<br />
I have a timer function that updates the X I then need to call the paint event to refresh the ellipse on the form. How do I do this? x is a global int variable. front is a global point.
***** GLobal Variable*****
public int x, y;
public Point front;
<br />
private void timer1_Tick(object sender, EventArgs e)<br />
{<br />
for (int i = 0; i < pictureBox1.Width; i++)<br />
{<br />
x = i;<br />
}<br />
<br />
}<br />
Thanks,
Laura
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You can never call the Paint event directly. Instead, you force it by doing this:
Invalidate();
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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As CG has pointed out, you call Invalidate() to invalidate the window, which will cause the OS to eventually call your paint handler. In addition, you can call Update() to force the OS to paint your window immediately.
/ravi
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Thanks so much that worked!
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I need to use a Win32 (unmanaged) function, and need to a way to get a pointer to a CSharp function. Is this possible in CSharp?
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Yes, I'm not sure of the mechanics right now, but I know it can be done.
You could look into the Canon SDK wrapper I have here as an article ( I didn't write that bit ). Or you could check www.pinvoke.net to see how it's done via an API that does it.
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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Not from CP but will bring you in the right direction
http://www.informit.com/guides/content.asp?g=dotnet&seqNum=473&rl=1
File Not Found
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Alright thanks guys! I'll check this info out ASAP.
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Yes, it's called a delegate.
Example:
/// <summary>
/// delegate used for EnumWindows() callback function
/// </summary>
public delegate bool LP_EnumWindowsProc(IntPtr hWnd, int lParam);
/// <summary>
/// Enumerate all windows, calling a delegate for each of them.
/// </summary>
/// <param name="ewp"></param>
/// <param name="lParam"></param>
/// <returns></returns>
[DllImport("user32.dll", CallingConvention=CallingConvention.StdCall)]
public static extern int EnumWindows(LP_EnumWindowsProc ewp, object lParam);
private static bool CollectVisibleWindows(IntPtr hWnd, int lParam) {
IntPtr ptr=(IntPtr)hWnd;
if (LP_User32.IsWindowVisible(ptr)) list.Add(ptr);
}
EnumChildWindows(ptr, new LP_EnumWindowsProc(CollectVisibleChildWindows), 0);
Hope this helps.
Luc Pattyn
[My Articles]
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I have a string of text similiar to below. I am new to c# and was wondering of there is any built in functionality that allows string parsing in c# to figure out new lines based on the carriage return line feed in a string of teext such as below. Or is it just like usual, where you must search for the '\r\n'?
EE.DDDDDDDD
14:00 03/13/2007 00176
14:00 03/13/2007 00311 AAAAAAA
* DDDDDDDD
TXT
LIC:DLLLLL 041 TAB:51100D6 EXPIRE: 05/15/2006
VIN:1D7HA00000000 VYR:2003 VMA:DODG VMO:SQ1 VST:12PU
NAM:DAN,DEXTER,DDASS CUST#:D02620977
ADR:16102 PRINCE LN
CTY:HEY ST:TT ZIP:85889 GVW:000000
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Yes, you can use the Split[^] method on the string class.
in your example, since you want to get the strings on each new line, here's the code I would write:
string theWholeText = ... ;
string[] delimiters = { Environment.NewLine };
string[] textLines = theWholeText.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
After that code, the textLines string array will contain each line of text.
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So if i read this correctly, say i have 10 new lines. What you are saying is that this split method would place each line in an array of size 10. Then i can access from there?
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As an alternative to splitting, you can create a StringReader that uses the string, and use the ReadLine method to read one line at a time.
StringReader reader = new StringReader(theString);
string line;
while ((line = reader.ReadLine()) != null) {
}
---
single minded; short sighted; long gone;
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As an alternative to splitting, you can create a StringReader that uses the string, and use the ReadLine method to read one line at a time.
using (StringReader reader = new StringReader(theString)) {
string line;
while ((line = reader.ReadLine()) != null) {
}
}
---
single minded; short sighted; long gone;
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hi .. !
this is really a problem for me .. !
coz any1 can just view the app. and edit anything in "about" box or something .. !
simply .. stealing it .. ... !!
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You can't stop it, obviously. You CAN encrypt the string that are inside your program, so that it's not obvious to people who view it when they are looking at your string, and so they can't just edit it without first knowing the encryption.
Oh, I thought this was the C++ forum. People can decompile your app, change it and recompile, because it's C#. So, there's really nothing you can do. Encrypting the strings will provide basic protection, tho.
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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im still new in C#, can u tell me how can I encrypt my strings?
actually .. my about box is not a dialog .. its a messagebox :P ... should i use about dialog box instead ?
and thanks for ur reply
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An easy way would be to add a known value to each character. Another way would be to explore system.Cryptography.
NiZaR.TecH wrote: my about box is not a dialog .. its a messagebox ... should i use about dialog box instead ?
It makes no difference.
In the real world, the number of users who will try to hack your app is very low, unless it's a technical app in the first place. i.e. the nature of the app determines the user base. But, most people do not worry.
You can indeed buy a compiler to turn .NET code into a real .exe, but it's very expensive, and rarely worth the cost.
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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