|
hi. i think you are looking for a template matching algorithm.
there are several ways for this. but the main problem in all algorithms is the size of object.
if you looking for a fixed size object then it can be a little easy but when you looking for circles of any size then you should read expert articles in this context.
sorry but i don't think that anyone in this heaven can give you a perfect code of this.
just google the "template matching" or "object recognition" to get some clues.
sometimes 0 can be 1
|
|
|
|
|
i have a problem in which i have to get data from one site into excel sheet . can i make this using C#. please help
|
|
|
|
|
You can certainly make this using C#.
|
|
|
|
|
thz for your kind reply .... well sir if u can help me how to get started. which classes i have to use. what r its requirement
|
|
|
|
|
I'd start by writing out my requirements, and then mapping out a couple of possible solutions (probably using storyboards).
naveen20_5 wrote: what r its requirement
This is your project. How are we supposed to know?
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys
|
|
|
|
|
naveen20_5 wrote: can i make this using C#.
You can do almost everything using C# (IT related  )
You can use this class[^] and use the DownloadData Method to get the byte[]. and then you can parse those data and create a excel file.
|
|
|
|
|
Its just that easy 
My current favourite word is: Delicious!
-SK Genius
Game Programming articles start - here[ ^]-
|
|
|
|
|
|
Well, thats just a hint 
|
|
|
|
|
Hi All,
I found this site
http://www.codeproject.com/KB/edit/HDNumericTextBox.aspx[^]
to be perfect for all my numeric text box needs. So I added the control to my toolbox without problems (dll was supplied), but when I drag and drop it on my form I get an error
"Failed to create component "numericTextBox".
System.FormatExeception: Input string was not in the correct format.
I really would like to get this up and working...and ideas on how to make this thingy work?
I'm in VS2008, C#, Windows Application.
Thanks!
|
|
|
|
|
Or you can just add MaskedTextBox control and set the MASK value to 0000000000.
And it will be numeric text box. simple
|
|
|
|
|
That doesn't give me decimals...
|
|
|
|
|
Then you can use 00000.00 as Mask. and it will be decimal.
|
|
|
|
|
but I want to use the numeric text box control...it's soo much easier and faster and does what I want. Just pop it in the form and your done..I have tons of them...
I also tried another piece of code and I got the same exact error...so it must be a form setting of some sort.
Thanks
|
|
|
|
|
Hi all!
I am trying to create an application for Pocket PC 2003 using C#, to send an SMS by connecting a built-in GSM modem through the USB port. I have found a library called SMSLib, which contains all the functions for sending n receiving an SMS through a GSM modem connected via USB.
I wrote a desktop appln. initially, to check whether the library works. It worked out successfully on the desktop app.
Now i have written the same code in a PPC2003 C# project, but it is not working.
The port to which i have connected the modem is not getting detected on the emulator. Because of this it is givin me an IOException. 
Plz. can sumone tel me wat i should do, so that the port gets detected on the emulator???????????
N yes, I have also tried using ActiveSync, but No Luck!! May be it is not useful, or may be I dont know how to use it.
PLEASE help me out... Plz....
Thank You! 
|
|
|
|
|
You should post your question in Mobile Developement [^]board and there maybe someone can give you any right direction.
I Love T-SQL
"Don't torture yourself,let the life to do it for you."
If my post helps you kindly save my time by voting my post.
|
|
|
|
|
Hello,
I'm having trouble with this code. I have 3 files:
program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace keyFortress
{
static class Program
{
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
lView mylView = new lView();
mylView.GetData();
mylView.LoadList();
}
}
}
lView.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlServerCe;
using System.Security.Cryptography;
using Microsoft.Win32;
namespace keyFortress
{
class lView
{
public DataSet _DataSet;
public SqlCeConnection _Conn;
public SqlCeDataAdapter _DataAdapterTitles;
public void GetData()
{
string strConn = @"Data Source = |DataDirectory|\psw01.sdf;Password=******";
try
{
_Conn = new SqlCeConnection(strConn);
string strSQL = "SELECT username, "
+ "password "
+ "FROM tbl_data "
+ "ORDER BY username";
_DataSet = new DataSet();
_DataAdapterTitles = new SqlCeDataAdapter(strSQL, _Conn);
_DataAdapterTitles.Fill(_DataSet, "tbl_data");
}
catch (Exception ex)
{
string msg = ex.Message.ToString();
MessageBox.Show(msg, "Unable to retrieve data.",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
public void LoadList()
{
DataTable dtable = _DataSet.Tables["tbl_data"];
listView1.Items.Clear();
for (int i = 0; i < dtable.Rows.Count; i++)
{
DataRow drow = dtable.Rows[i];
if (drow.RowState != DataRowState.Deleted)
{
ListViewItem lvi = new ListViewItem(drow["username"].ToString());
lvi.SubItems.Add(drow["password"].ToString());
listView1.Items.Add(lvi);
}
}
}
}
}
Form1.Designer.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlServerCe;
using System.Security.Cryptography;
using Microsoft.Win32;
namespace keyFortress
{
partial class Form1
{
private System.ComponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.listView1 = new System.Windows.Forms.ListView();
this.SuspendLayout();
this.listView1.Location = new System.Drawing.Point(12, 28);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(131, 167);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.View = View.Details;
this.listView1.LabelEdit = true;
this.listView1.AllowColumnReorder = true;
this.listView1.CheckBoxes = false;
this.listView1.FullRowSelect = true;
this.listView1.MultiSelect = false;
this.listView1.GridLines = false;
this.listView1.Columns.Add("username", -2, HorizontalAlignment.Left);
this.listView1.Columns.Add("password", -2, HorizontalAlignment.Left);
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 264);
this.Controls.Add(this.listView1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.ListView listView1;
}
}
When I compile this I get the following error:
The name 'listView1' does not exist in the current context, this appears twice:
listView1.Items.Clear();
listView1.Items.Add(lvi);
Can anybody tell what the problems is?
Many thanks
modified on Wednesday, March 25, 2009 10:52 AM
|
|
|
|
|
The problem is that you have never instancized (whatever you spell this word :P) it.
In order to use the listView1, you have to call the InitializeComponents() function, do this in the constructor of lView:
public lView()
{
InitializeComponents();
{
And it should work.
|
|
|
|
|
I've ammended the code so that it looks like:
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlServerCe;
using System.Security.Cryptography;
using Microsoft.Win32;
namespace keyFortress
{
class lView
{
public DataSet _DataSet;
public SqlCeConnection _Conn;
public SqlCeDataAdapter _DataAdapterTitles;
public lView()
{
InitializeComponent();
}
public void GetData()
{
string strConn = @"Data Source = |DataDirectory|\psw01.sdf;Password=******";
try
{
_Conn = new SqlCeConnection(strConn);
string strSQL = "SELECT username, "
+ "password "
+ "FROM tbl_data "
+ "ORDER BY username";
_DataSet = new DataSet();
_DataAdapterTitles = new SqlCeDataAdapter(strSQL, _Conn);
_DataAdapterTitles.Fill(_DataSet, "tbl_data");
}
catch (Exception ex)
{
string msg = ex.Message.ToString();
MessageBox.Show(msg, "Unable to retrieve data.",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
public void LoadList()
{
DataTable dtable = _DataSet.Tables["tbl_data"];
listView1.Items.Clear();
for (int i = 0; i < dtable.Rows.Count; i++)
{
DataRow drow = dtable.Rows[i];
if (drow.RowState != DataRowState.Deleted)
{
ListViewItem lvi = new ListViewItem(drow["username"].ToString());
lvi.SubItems.Add(drow["password"].ToString());
listView1.Items.Add(lvi);
}
}
}
}
}
However this gives a different error (orginal 2 errors still remain)
The name 'InitializeComponent' does not exist in the current context
|
|
|
|
|
listView1 is defined on the form, not in lView. Form1 and lView are two separate classes, and neither knows how to reach the other one.
1a) Instead of creating mylView in the Main() method, create it inside the form
OR
1b) Change the declaration of listView1 from private to public in the Form1 code
(The first option is preferable, as the second violates standard practices)
THEN
2) Change LoadList to accept a ListView as a parameter, and pass listView1 into it.
Example:
public void LoadList(ListView myListView)
{
...
}
In the Form1 constructor:
lView mylView = new lView();
mylView.GetData();
mylView.LoadList(listView1);
|
|
|
|
|
Thanks. I'm beginning to understand. I think I've implemented the changes you suggested. However the orginal errors remain.
Here is the code that I now have:
Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace keyFortress
{
static class Program
{
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
lView.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlServerCe;
using System.Security.Cryptography;
using Microsoft.Win32;
namespace keyFortress
{
class lView
{
public DataSet _DataSet;
public SqlCeConnection _Conn;
public SqlCeDataAdapter _DataAdapterTitles;
public void GetData()
{
string strConn = @"Data Source = |DataDirectory|\psw01.sdf;Password=******";
try
{
_Conn = new SqlCeConnection(strConn);
string strSQL = "SELECT username, "
+ "password "
+ "FROM tbl_data "
+ "ORDER BY username";
_DataSet = new DataSet();
_DataAdapterTitles = new SqlCeDataAdapter(strSQL, _Conn);
_DataAdapterTitles.Fill(_DataSet, "tbl_data");
}
catch (Exception ex)
{
string msg = ex.Message.ToString();
MessageBox.Show(msg, "Unable to retrieve data.",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
public void LoadList(ListView myListView)
{
DataTable dtable = _DataSet.Tables["tbl_data"];
listView1.Items.Clear();
for (int i = 0; i < dtable.Rows.Count; i++)
{
DataRow drow = dtable.Rows[i];
if (drow.RowState != DataRowState.Deleted)
{
ListViewItem lvi = new ListViewItem(drow["username"].ToString());
lvi.SubItems.Add(drow["password"].ToString());
listView1.Items.Add(lvi);
}
}
}
}
}
Form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace keyFortress
{
public partial class Form1 : Form
{
public Form1()
{
lView mylView = new lView();
mylView.GetData();
mylView.LoadList(listView1);
}
lView mylView = new lView();
}
}
Form1.Designer.cs
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlServerCe;
using System.Security.Cryptography;
using Microsoft.Win32;
namespace keyFortress
{
partial class Form1
{
private System.ComponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.listView1 = new System.Windows.Forms.ListView();
this.SuspendLayout();
this.listView1.Location = new System.Drawing.Point(12, 28);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(131, 167);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.View = View.Details;
this.listView1.LabelEdit = true;
this.listView1.AllowColumnReorder = true;
this.listView1.CheckBoxes = false;
this.listView1.FullRowSelect = true;
this.listView1.MultiSelect = false;
this.listView1.GridLines = false;
this.listView1.Columns.Add("username", -2, HorizontalAlignment.Left);
this.listView1.Columns.Add("password", -2, HorizontalAlignment.Left);
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 264);
this.Controls.Add(this.listView1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.ListView listView1;
}
}
|
|
|
|
|
Almost there... Two things:
1) Your Form1 constructor should have already had a call to InitializeComponent();. You need to keep that in there, or it won't actually create any of the controls. That should be the first line in the constructor. The way the designer works is that it puts all of the code in InitializeComponent so you can just push it out of the way when you're writing your own code.
2) I'm guessing you're new to function parameters in general. No problem. We all were at one point or another (Ah, memories)...
Instead of just giving you the answer, let me explain how it works...
Say you're making a function to add two numbers together. You want to call it like this:
int dogs = 5;
int cats = 2;
int animals = AddNumbers(dogs, cats);
But one of the main reasons for functions is that they're reusable. Somewhere else in your program, you might want to do this:
int boys = 6;
int girls = 3;
int children = AddNumbers(boys, girls);
Now, when you actually make the AddNumbers function, it doesn't know what's being passed into it. All it needs to know is how to take any two numbers and add them together. So we implement it like this:
public int AddNumbers(int a, int b)
{
return a + b;
}
So what are 'a' and 'b'? Anything. In the first case, 'a' represents 'dogs' and 'b' represents 'cats'. In the second, 'a' represents 'boys' and 'b' represents 'girls'. The function doesn't know what boys and girls or cats and dogs are. It just uses 'a' and 'b' to represent 'whatever is being added'.
So back to your current problem... Instead of adding two numbers together, we're putting data into a ListView. We're passing listView1 to the function, but the function doesn't know what listView1 is. It only knows the name of its parameter, which in this case represents the same thing. The method declaration could just as easily have been:
public void LoadList(ListView a)
See where I'm going with this?
|
|
|
|
|
Ah I see, I've change the Loadlist() method so that instead of working on myListView it uses the following:
public void LoadList(ListView listView1)
It now works as expected.
I appreciate you taking the time to help and explain.
|
|
|
|
|
Sorry, one other quick question some code seems to disappears when I alter the controls, for example:
Before:
this.listView1.Location = new System.Drawing.Point(12, 28);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(131, 167);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.View = View.Details;
this.listView1.LabelEdit = true;
this.listView1.AllowColumnReorder = true;
this.listView1.CheckBoxes = false;
this.listView1.FullRowSelect = true;
this.listView1.MultiSelect = false;
this.listView1.GridLines = false;
this.listView1.Columns.Add("username", -2, HorizontalAlignment.Left);
this.listView1.Columns.Add("password", -2, HorizontalAlignment.Left);
If I then add a button the code changes to this:
this.listView1.AllowColumnReorder = true;
this.listView1.FullRowSelect = true;
this.listView1.LabelEdit = true;
this.listView1.Location = new System.Drawing.Point(12, 28);
this.listView1.MultiSelect = false;
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(131, 167);
this.listView1.TabIndex = 0;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.View = System.Windows.Forms.View.Details;
As it chops the bottom of the code off the programs no longer works? Is this happening by design?
|
|
|
|
|
The InitializeComponent() method is what the designer creates... It's a translation of everything you've done via point-and-click. Whenever you make any changes that way, it recreates the method.
Any initialization code YOU write should instead be in the Form1 constructor, right after the call to that method (Or somewhere else, but not in InitializeComponent).
I believe there's even a comment at the beginning reading:
So yes, this is by design.
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
