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OriginalGriff wrote: average novel in under two hours
Man your reading habit must be bloody expensive.
100s of rows a second, I don't think you could even focus comfortably on the data!
Never underestimate the power of human stupidity
RAH
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It was, in space alone! 
Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.
Digital man: "You are, in short, an idiot with the IQ of an ant and the intellectual capacity of a hose pipe."
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I'm develop a online logger monitor,
i know the user could be able to read the db in the grid
The grid will be update each second with amount of data that I will define (such as 200 events)
i'm asking about the Implementation
ronen
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I hope you're not expecting to have one app that does both the gathering and the displaying.
I recommend a Web Service to gather the data. The display app can also use the Web Service or query the database directly.
I (and several others here) dislike DataAdapters, DataSets, and DataGridViews. I recommend using a DataReader directly and a TreeView.
Don't put data access code directly in your GUI code; write a Data Access Layer.
Don't use concatenation to form your SQL statements; use parameters.
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thanks for the tips
the apps should be run localy, can i stll run web service, the service should collect the data and insert to db?
i'm think of using several threads in te App (one handling the data recieving, one for processing and store in DB, and one for displaying
thanks
ronen
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Ronenb wrote: can i stll run web service
Yes.
Ronenb wrote: the service should collect the data and insert to db?
Yes.
Ronenb wrote: several threads
Yes.
Ronenb wrote: one handling the data recieving
Querying from DB or Service
Ronenb wrote: one for processing and store in DB
No. That's done by the Service.
Ronenb wrote: one for displaying
That's the app's main thread.
By having a separate process for collecting and storing the data, you can have multiple clients displaying the data.
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thank you very much for your input
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 How to check For duplicate Record Before inserting in Xml File Using C# .
Regards & Thanks,
Kuldeep Verma
Ass.IT Developer
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hello
i have an educational software that should be installed on different PCs across the enterprise.
my program is using a 5000 text, xml, html files as source of it's content. i don't want my source to be tampered with, copied or used illegally. what i intend to do is to encrypt my source seperately and then put the encrypted files in a folder inside of my app so later my app can read and decrypt each file that is requested by user. the app will be installed and used anywhere.
but the problem is that to secure and store the encryption key inside my application i have to use a key container while as far as i remember(correct me if i'm wrong) they're machine based and can't be used on different machines while i need my key to be fixed for all the installed copies on any PC. i know a lot of softwares using such a architecture but i don't know how do they do that.
any idea?
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When creating a Silverlight dependency property of type decimal (on my control) I got the following errors when setting a value in XAML:
Failed to create a 'System.Decimal' from the text '200.0'.
Failed to create a 'System.Decimal' from the text '200'.
SERIOUSLY? Is it THAT hard?
____________________________________________________________
Be brave little warrior, be VERY brave
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No. It sounds like your DP and/or XAML is wrong. You might want to post them  .
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C# expects decimal literals to have an M at the end -- 200.0M, will that work?
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Here is the question..
There are 10,000 entries in text file which has following format
"name:telephone number:address"
We need to make a program that will read that file and look up the name, telephone number or address from any one of them in O(log n) complexity. So obviously, I'm gonna store each entry in array and sort them and do binary search to look up a particular variable, as it needed to O(logn) in complexity.
Now, my question is should I copy the array to another three arrays, each of them sorted according to three parameters(telephone numbers, names, address) and then perform look up search. Is there any better way of doing it without taking so much space because basically to make program in O(logn) complexity, you are taking 3 times the space as compared to original linear search.
Suggest the best way of doing it. Any help will be appreciated.
Shivam
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as name, number, and address are strings, they wouldn't need to get stored multiple times; all you need to duplicate is pointers/references to them. And with say 250 chars per telephone, you would need less than 10 MB of memory anyway.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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Thank you for the response but this not what I'm trying to ask. So far, I've made a class called telephone with three member variables of String type, those are names, address and telephone number. Then I made array of telephone class of size 10,000. Now this array has randomly distributed telephone entries but I need arrange sorted order according to each three variable, i.e. telephone, name and address so that I could perform binary search.
Let say user enter telephone number then my program will perform binary search on list sorted according to telephone numbers.
If user enter name then my program will perform search on the list which is started according to name and similarly it will do same procedure for address. So basically you need three list, but can you think of any other method of doing this?
Thank you
Shivam
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what I said is this, using your terminology: you make 10,000 Telephone instances, and store each of them in three different arrays, then sort each of these arrays. That is still only 10,0000 Telephones, not 30,000.
as for sorting stuff, there are smarter ways to represent data. Either come up with something yourself, or make use of existing ones, see e.g. the .NET collections.
Finally, as this is homework, you're supposed to do the work yourself.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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Oh, I got it. Thank you very much.
Shivam
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You're welcome.
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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How about three of Dictionary<string,Telephone> ?
Or a spell check tree?
Or this thing[^], whatever it is.
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Ok, its a homework of data structure course, so u can't expect us to use pre-written classes of .NET. We have to write complete program on our own  . But the suggestions you gave are really good, I'll definitely look into them.
Thank you
Shivam
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I have problem with this code is draw ships many time
if u have any idea about it
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Diagnostics;
using System.Text;
using System.Windows.Forms;
namespace DrawingGeomerticShips
{
public partial class Form1 : System.Windows.Forms.Form
{
private Pen nPen;
public Form1():base()
{
InitializeComponent();
nPen = new Pen(Color.Black);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
//private Bitmap ColorMap;
public enum dModes : int
{
Line,
Rectangle,
Ellipse,
Brush,
Path,
Text,
Eraser
}
//private Bitmap bmp;
private Bitmap bmp2;
private Graphics g2;
private Color clr= Color.Red;
//private Color clr2 = Color.blue;
private int StartX;
private int StartY;
private int EndX;
private int EndY;
private int BoxWidth;
private int BoxHeight;
private System.Drawing.Drawing2D.GraphicsPath mpath = new System.Drawing.Drawing2D.GraphicsPath();
private dModes dmode;
private int xLoc;
private int yLoc;
//private dStyles dstyle = dStyles.Outline;
private Int16 pWidth = 1;
//private Cursor c = new Cursor(GetEmbeddedFile("Whiteboard.ColorPicker.ico"));
//private Cursor er = new Cursor(GetEmbeddedFile("Whiteboard.Eraser.ico"));
private bool isDraw;
private PointF pF;
private PointF pFOld;
[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint="HideCaret", ExactSpelling=true, CharSet=System.Runtime.InteropServices.CharSet.Ansi, SetLastError=true)]
public static extern Int32 HideCaret(Int32 hwnd);
private bool allow;
[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint="ShowCaret", ExactSpelling=true, CharSet=System.Runtime.InteropServices.CharSet.Ansi, SetLastError=true)]
public static extern Int32 ShowCaret(Int32 hwnd);
[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint="CreateCaret", ExactSpelling=true, CharSet=System.Runtime.InteropServices.CharSet.Ansi, SetLastError=true)]
public static extern Int32 CreateCaret(Int32 hwnd, Int32 hBitmap, Int32 nWidth, Int32 nHeight);
[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint="SetCaretPos", ExactSpelling=true, CharSet=System.Runtime.InteropServices.CharSet.Ansi, SetLastError=true)]
public static extern Int32 SetCaretPos(Int32 x, Int32 y);
string txt = null;
public Color color
{
get
{
return clr;
}
}
public Int16 penWidth
{
get
{
return pWidth;
}
set
{
pWidth = value;
nPen.Width = pWidth;
}
}
public void DrawPath(MouseEventArgs e) //path
{
}
public void DrawBrush(MouseEventArgs e) //brush
{
}
public void DrawLine(MouseEventArgs e) //line
{
}
private void SetLineW(Int16 MyW)
{
if (MyW < 1)
{
MyW = 1;
}
penWidth = MyW;
}
public void DrawRectangle(System.Windows.Forms.MouseEventArgs e) //rectangle
{
xLoc = 0;
yLoc = 0;
if (e.X > StartX)
{
BoxWidth = e.X - StartX;
xLoc = StartX;
}
else
{
BoxWidth = StartX - e.X;
xLoc = e.X;
}
if (e.Y > StartY)
{
BoxHeight = e.Y - StartY;
yLoc = StartY;
}
else
{
BoxHeight = StartY - e.Y;
yLoc = e.Y;
}
// DrawArea.CreateGraphics().DrawRectangle(nPen, xLoc, yLoc, BoxWidth, BoxHeight);
// DrawArea.Refresh();
}
public void DrawEllipse(System.Windows.Forms.MouseEventArgs e) //ellipse
{
xLoc = 0;
yLoc = 0;
if (e.X > StartX)
{
BoxWidth = e.X - StartX;
xLoc = StartX;
}
else
{
BoxWidth = StartX - e.X;
xLoc = e.X;
}
if (e.Y > StartY)
{
BoxHeight = e.Y - StartY;
yLoc = StartY;
}
else
{
BoxHeight = StartY - e.Y;
yLoc = e.Y;
}
// DrawArea.CreateGraphics().DrawEllipse(nPen, xLoc, yLoc, BoxWidth, BoxHeight);
//DrawArea.Refresh();
}
public void Eraser(System.Windows.Forms.MouseEventArgs e) //eraser
{
DrawArea.Refresh();
DrawArea.CreateGraphics().FillRectangle(Brushes.White, e.X - 1, e.Y, penWidth, penWidth);
DrawArea.CreateGraphics().DrawRectangle(Pens.Black, e.X - 1, e.Y, penWidth, penWidth);
}
private void Form1_Load(object sender, EventArgs e)
{
//color = Color.Black;
bmp2 = new Bitmap(DrawArea.Width, DrawArea.Height);
g2 = Graphics.FromImage(bmp2);
g2.SmoothingMode = SmoothingMode.AntiAlias;
}
private void DrawArea_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
isDraw = true;
StartX = e.X;
StartY = e.Y;
if (dmode == dModes.Text) //if text mode is selected it creates a caret on the clicked position
{
pF = new PointF((float)(e.X), (float)(e.Y - FontHeight / 2.0));
if (pF.Equals(pFOld))
{
}
else
{
allow = true;
}
DrawArea.Focus();
CreateCaret(DrawArea.Handle.ToInt32(), 0, 2, this.FontHeight);
//SetCaretPos(pF.X, pF.Y);
ShowCaret(DrawArea.Handle.ToInt32());
}
}
}
private void DrawArea_MouseMove(object sender, MouseEventArgs e)
{
if (isDraw)
{
switch (dmode)
{
case dModes.Ellipse:
DrawArea.CreateGraphics().DrawEllipse(nPen, xLoc, yLoc, BoxWidth, BoxHeight);
break;
case dModes.Line:
EndX = e.X;
EndY = e.Y;
// DrawArea.Refresh();
DrawArea.CreateGraphics().DrawLine(nPen, StartX, StartY, EndX, EndY);
break;
case dModes.Brush:
mpath.AddLine(e.X, e.Y, e.X, e.Y);
DrawArea.CreateGraphics().DrawPath(nPen, mpath);
break;
case dModes.Rectangle:
DrawArea.CreateGraphics().DrawRectangle(nPen, xLoc, yLoc, BoxWidth, BoxHeight);
break;
case dModes.Path:
EndX = e.X;
EndY = e.Y;
//DrawArea.Refresh();
DrawArea.CreateGraphics().DrawLine(nPen, StartX, StartY, EndX, EndY);
break;
case dModes.Eraser:
Eraser(e);
g2.FillRectangle(Brushes.White, e.X, e.Y, pWidth, pWidth);
break;
}
}
}
private void DrawArea_MouseUp(object sender, MouseEventArgs e)
{
isDraw = false;
switch (dmode)
{
case dModes.Ellipse:
g2.FillEllipse(new SolidBrush(clr), xLoc, yLoc, BoxWidth, BoxHeight);
break;
case dModes.Line:
g2.DrawLine(nPen, StartX, StartY, EndX, EndY);
break;
case dModes.Brush:
g2.DrawPath(nPen, mpath);
mpath.Reset();
break;
case dModes.Rectangle:
g2.DrawRectangle(nPen, xLoc, yLoc, BoxWidth, BoxHeight);
break;
case dModes.Path:
mpath.AddLine(StartX, StartY, e.X, e.Y);
g2.DrawPath(nPen, mpath);
// mpath.Reset();
break;
case dModes.Text:
if (allow)
{
g2.DrawString(txt, this.Font, new SolidBrush(clr), pFOld);
}
allow = false;
txt = "";
//tbox.Clear()
break;
}
DrawArea.BackgroundImage = bmp2;
}
private void DrawArea_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
dmode = dModes.Ellipse;
mpath.Reset();
hide_Caret();
}
private void button2_Click(object sender, EventArgs e)
{
dmode = dModes.Rectangle;
mpath.Reset();
hide_Caret();
}
private void button7_Click(object sender, EventArgs e)
{
dmode = dModes.Line;
mpath.Reset();
hide_Caret();
}
private void button4_Click(object sender, EventArgs e)
{
dmode = dModes.Brush;
mpath.Reset();
hide_Caret();
}
private void button5_Click(object sender, EventArgs e)
{
dmode = dModes.Path;
hide_Caret();
}
private void button6_Click(object sender, EventArgs e)
{
dmode = dModes.Eraser;
hide_Caret();
}
public object hide_Caret() //hides the caret
{
if (txt != "")
{
g2.DrawString(txt, this.Font, new SolidBrush(clr), pFOld);
}
DrawArea.BackgroundImage= bmp2;
allow = false;
HideCaret(DrawArea.Handle.ToInt32());
txt = "";
//INSTANT C# NOTE: Inserted the following 'return' since all code paths must return a value in C#:
return null;
}
private void DiColor_Paint(object sender, PaintEventArgs e)
{
}
private void DiColor_MouseClick(object sender, MouseEventArgs e)
{
ColorDialog MyDC = new ColorDialog();
DialogResult Dr = MyDC.ShowDialog();
if (Dr == DialogResult.OK && MyDC.Color != null)
{
this.clr = MyDC.Color;
DiColor.BackColor = clr;
}
}
private void trackBar1_Scroll(object sender, EventArgs e)
{
SetLineW(Convert.ToInt16(trackBar1.Value));
}
private void button3_Click(object sender, EventArgs e)
{
dmode = dModes.Text;
mpath.Reset();
}
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
txt += e.KeyChar;
this.Refresh();
//INSTANT C# TODO TASK: The 'On Error Resume Next' statement is not converted by Instant C#:
if (e.KeyChar == '\b') //backspace
{
txt = txt.Substring(0, txt.Length - 2);
e.Handled = true;
}
g2.PageUnit = GraphicsUnit.Pixel;
//SetCaretPos(pF.X + g2.MeasureString(txt, new Font("arial", 8)).Width, pF.Y);
DrawArea.CreateGraphics().DrawString(txt, this.Font, new SolidBrush(clr), pF.X, pF.Y);
pFOld = pF;
}
private void DrawArea_Paint(object sender, PaintEventArgs e)
{
}
}
}
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This is totally unreadable; put your code between <pre></pre> tags, and mark the lines that have the problem.
I must get a clever new signature for 2011.
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That is unformatted and unreadable. I think I saw some CreateGraphics which is probably very wrong. Please edit your question to include PRE tags, then read this[^].
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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