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Have you looked into the BackgroundWorker[^] component? It's designed especially for this. *edit link fixed
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Thanks !
Unfortunately your link does not work
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Maybe it works in the background? 
Try this one[^].
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- use PRE tags to preserve formatting when showing multi-line code snippets
- before you ask a question here, search CodeProject, then Google
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Tomerland wrote: Is there any "kind of design-pattern" by which this problem can be solved?
No single design pattern will provide solutions for the various problems that situation entails. You will need to implement several patterns. As always start with MVC. For User Interface components that need to enable/disable based on application state and multiplicity in relationships ("This can be complicated because of a lot of dependencies.") you might look into extending the Command Pattern to include UI control state mechanisms ( enabled, visible, checked, etc.)
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HI,
I am trying to display the contends in a .cs folder inside a listbox .
i wrote the code where in i can open the file but after that how to show the contents inside the list box i am stuck.i want tehe list box to show all the codes inside the file.
do i need to use StreamReader?
otherwise how can i do it?
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog objDialog = new OpenFileDialog();
objDialog.Title = "Open .cs File";
objDialog.Filter = "C Sharp Files (*.cs)|*.cs|Text Files (*.txt)|*.txt";
objDialog.InitialDirectory = @"D:\back up d \users\k\ConsoleApplication1";
if (objDialog.ShowDialog() == DialogResult.OK)
{
MessageBox.Show(objDialog.FileName.ToString());
}
listBox1.Items.Add(@"D:\back up d \users\k\ConsoleApplication1");
Any help is welcome.
Thanking You
p
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You could use a filestream and a streamreader
fafafa, ringakta icke sådant som bringa ack så naggande högönsklig välmåga å baronens ära.
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File.ReadAllLines() may help you.
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- use PRE tags to preserve formatting when showing multi-line code snippets
- before you ask a question here, search CodeProject, then Google
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(?mx-s:\#region\b
(?<name>.*)
(?<content>
(?>
\#region\b.* (?<djup>) |
\#endregion\b (?<-djup>) |
[^\#]+
)+
(?(djup)(?!))
)
\#endregion\b.*
)
This is my pattern, it gets the content of #region sections. It works perfectly in Expresso,
but when i run it on the same code in C# it does not!
const string GET_REGIONS = @"(?mx-s:\#region\b
(?<name>.*)
(?<content>
(?>
\#region\b.* (?<djup>) |
\#endregion\b (?<-djup>) |
[^\#]+
)+
(?(djup)(?!))
)
\#endregion\b.*
)
";
MatchCollection regions = Regex.Matches(classContent, GET_REGIONS);
Any ideas about what im doing wrong? 
fafafa, ringakta icke sådant som bringa ack så naggande högönsklig välmåga å baronens ära.
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It worked when i used Expressos generate C# code ^__^
fafafa, ringakta icke sådant som bringa ack så naggande högönsklig välmåga å baronens ära.
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I'm struggling to get this to work..
Is it possible to set the checked state on all the selected rows in an datagridview at the same time (e.g. when the user selects multiple rows using ctrl+mouseclick)?
Any help would be appreciated 
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hakonvik wrote: I'm struggling to get this to work..
Is it possible to set the checked state on all the selected rows in an datagridview at the same time (e.g. when the user selects multiple rows using ctrl+mouseclick)?
From reading the manual, I've come up with a minimal idea. To set checked on all rows selected, you would iterate over all the rows of your data source, and for each row check IsSelected, and if it is, set the appropriate checked value in the data source. Then you'd have to get the data grid to update its display for the new values.
Nathan
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Well, yes that is right but not quite my problem.
My datagrid has an checkbox on each row in the first cell (built in code). The problem occurs when I have selected multiple rows and click one of the checkbox cells (in which case I want all the selected to get checked  )
I can check selected rows by putting a button or link outside the grid, but that is not "normal" windows behaviour..
Any ideas
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hi
i create a queue and service in my sql server 2005 by this code :
create queue myNotificationQueue
create service myService on queue myNotificationQueue
in my csharp code i wrote this code : (i copy this instance from msdn website)
class Program
{
string connstring = null;
SqlConnection conn = null;
SqlDataReader rdr = null;
static void Main(string[] args)
{
Program c = new Program();
c.connstring = @"Data Source=MYLAPTOP\SQLLAPTOP;Initial Catalog=pubs;Persist Security Info=True;User ID=sa;Password=1";
c.conn = new SqlConnection(c.connstring);
c.DoWork();
Console.ReadLine();
}
private void DoWork()
{
conn.Open();
rdr = GetJobs(2);
if (rdr != null)
{
rdr.Close();
WaitForChanges();
}
conn.Dispose();
}
public SqlDataReader GetJobs(int JobId)
{
using (SqlCommand cmd = new SqlCommand("Select job_id, job_desc from dbo. jobs where job_id = @id", conn))
{
try
{
cmd.Parameters.AddWithValue("@id", JobId);
SqlNotificationRequest not = new SqlNotificationRequest();
not.ID = new Guid(); // error occured
// this must be a service named MyService in the pubs database
// associated with a queue called notificationqueue (see below)
// service must go by QueryNotifications contract
not.Service = "myService"; // error occured
not.Timeout = 0;
// hook up the notification request
cmd.Notification = not;
rdr = cmd.ExecuteReader();
while (rdr.Read())
Console.WriteLine(rdr[0]);
rdr.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return rdr;
}
}
public void WaitForChanges()
{
// wait for notification to appear on the queue
// then read it yourself
using (SqlCommand cmd = new SqlCommand("WAITFOR (Receive convert(xml,message_body) from notificationqueue)", conn))
{
object o = cmd.ExecuteScalar();
// process the notification message however you like
Console.WriteLine(o);
}
}
}
but when i compile it, two following errors shown me :
System.Data.Sql.SqlNotificationRequest' does not contain a definition for 'ID'
System.Data.Sql.SqlNotificationRequest' does not contain a definition for 'Service'
How to solve my problem ?
thanks
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Check this[^] out.
Take care,
Tom
-----------------------------------------------
Check out my blog at http://tjoe.wordpress.com
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thanks for reply
i corrected my code as following :
class Program
{
string connstring = null;
SqlConnection conn = null;
SqlDataReader rdr = null;
static void Main(string[] args)
{
Program c = new Program();
c.connstring = @"Data Source=MYLAPTOP\SQLLAPTOP;Initial Catalog=pubs;Persist Security Info=True;User ID=sa;Password=1";
c.conn = new SqlConnection(c.connstring);
c.DoWork();
Console.ReadLine();
}
private void DoWork()
{
conn.Open();
rdr = GetJobs();
if (rdr != null)
{
rdr.Close();
WaitForChanges();
}
conn.Dispose();
}
public SqlDataReader GetJobs()
{
using (SqlCommand cmd = new SqlCommand("Select job_id, job_desc from dbo.jobs", conn))
{
try
{
//cmd.Parameters.AddWithValue("@id", JobId);
SqlNotificationRequest not = new SqlNotificationRequest();
not.UserData = Guid.NewGuid().ToString();
// this must be a service named MyService in the pubs database
// associated with a queue called notificationqueue (see below)
// service must go by QueryNotifications contract
not.Options = "service=myService;local database=pubs";
not.Timeout = 0;
// hook up the notification request
cmd.Notification = not;
rdr = cmd.ExecuteReader();
while (rdr.Read())
Console.WriteLine(rdr[0]);
rdr.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return rdr;
}
}
public void WaitForChanges()
{
// wait for notification to appear on the queue
// then read it yourself
using (SqlCommand cmd = new SqlCommand("WAITFOR (Receive convert(xml,message_body) from myNotificationQueue)", conn))
{
cmd.CommandTimeout = 0;
object o = cmd.ExecuteScalar();
// process the notification message however you like
Console.WriteLine(o);
}
}
}
but in runtime, when i update any record in jobs table, my app was not reponse to that change (nothing occured),
where does my problem ?
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Hello
I have an application wich runs with directx.
My problem is i'm new to directx and the thing which I want to create is pretty simple.
I want to load an image and then show it on the interface, then I want to get the events when the user clicks/mouse over/whatever on the picturebox.
I have tried a few tutorials on the internet but havent seen to find a thing which solves my problem.
I hope there is an easy way to do this, like an picturebox which can load the image easy.
if anyone knows a good article/tutorial/example on how to do this I would be happy.
//QzRZ
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We have an application using MSMQ on the clients, and are investigating the possibility of having the server communicate with the clients using this mechanism.
The clients send messages to the server and the server send messages to the client (initiated from both sides). Messages are infrequent (could be many minutes from message to message), so I'd like to use async. messaging. This works well for local queues - is this also possible for a remote queue?
I have two options (our server will possibly be connected to 1000+ clients):
1. Create local queues on the server that client sends to, server uses beginPeek and other standards async. mechanisms for reading those queues. Then we'll have 1000s of queues all waiting at a beginPeek on the server? Is this possible in practice (remember infrequent messages)?
2. Use async. mechanisms to the remote queue (queue is on the client). I don't know how the underlying mechanism is, but this would possibly keep a connection open from the server to the client?
Any insight will be appreciated!
Jens Petter Abrahamsen
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Forgive me for not thinking about this before:
The server would only need one (local) queue - and then determine which client sent the message by looking at the message. Thus, no need for 1000+ queues on the server. This local queue could of course use an asynchronous read mechanism if desirable.
I still don't know if it's possible to call async read functions on a remote queue, though, but this won't be necessary with the above alternative.
Jens Petter Abrahamsen
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Hey all,
I am a relatively new programmer. Worked in the industry for about a year and a half as a junior and obviously college and uni before that.
I am looking for something fun to do, but also something that I could possibly display to other prospective employers, maybe something that could be of use for the development community. Does anyone have any ideas of what I could write in c# that would..
1. Be quite fun to develop
2. Be interesting an unusual that I could maybe blog about
3. Help me to learn more about fundamental processes and practices
I am basically a bit fed up with the usual run of the mill development I do here and am looking for a project that I could turn around to someone and say "hey, I did that".
Any idea's would be welcome.
Cheers.
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daviiie wrote: 1. Be quite fun to develop
What do you find fun?
daviiie wrote: 2. Be interesting an unusual that I could maybe blog about
What do you regard as interesting?
daviiie wrote: 3. Help me to learn more about fundamental processes and practices
What do you need to learn?
If it is a website you could look at the Web Client Software Factory as it is part of the work by the pattens and practices group in Microsoft (lots of good processes to learn from that). If that doesn't interest you there are other projects from that group that might spark something.
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Hi Colin,
I suppose I should have been more specific. By fun and interesting I would consider projects that use funky data structures or algorithms. I like stuff thats a little bit out of the box. I recently, just for the fun of it, developed an swi-prolog web service (the web service was already pre-written by swi, i'm not that good) to query a topic map database structure to dynamically assert facts which can in turn be queried by prolog and dumped out as xml which is picked up by a flex front end and displayed.
I will eventually get around to making some kind of simple natural language processor and inference engine type thing and get it hosted. As fun as that was though I consider it something that would be seen as a "hobbyist" computing activity that although would be an interesting thing to display at an interview isn't really that relevant when it comes to c# .net jobs.
I'd like something that utalizes c# in perhaps an unusual way, or to write a tool that perhaps would be very useful to other developers. A dll that I could open source and say "you know that thing that always annoys you when you program, well I've done something that sidesteps it...enjoy". I was thinking perhaps about some sort of encoding library because I am always running into problems with encodings and have yet to find something that makes my life easier.
Nice website by the way, I am a fellow Glasweigien although I don't currently live in the uk.
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I have 2 column one textbox and the other is combobox
I want to select from the combo the ID appear in the text column and vis versa.
The data source is data set (not visual) for the combo column
this.column2.datasource= ds.table[0];
this.colomn2.dispalymember=ds.table[0].Rows[0][1];
this.colomn2.valuemember=ds.table[0].Rows[0][1];
merwa
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Hi,
I want to send a mouseclick to a defined window in c#, without moving the cursor. It should just leftclick on a specified (X,Y) position on the screen.
Can i do that without moving the cursor?
And can it work if the target window is hidden/minimized?
Hope someone can give me a code example
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[Flags]
public enum MouseEvent : uint
{
MOUSEEVENTF_MOVE = 0x0001,
MOUSEEVENTF_LEFTDOWN = 0x0002,
MOUSEEVENTF_LEFTUP = 0x0004,
MOUSEEVENTF_RIGHTDOWN = 0x0008,
MOUSEEVENTF_RIGHTUP = 0x0010,
MOUSEEVENTF_MIDDLEDOWN = 0x0020,
MOUSEEVENTF_MIDDLEUP = 0x0040,
MOUSEEVENTF_XDOWN = 0x0080,
MOUSEEVENTF_XUP = 0x0100,
MOUSEEVENTF_WHEEL = 0x0800,
MOUSEEVENTF_VIRTUALDESK = 0x4000,
MOUSEEVENTF_ABSOLUTE = 0x8000
}
public enum InputType : uint
{
INPUT_MOUSE = 0,
INPUT_KEYBOARD = 1,
INPUT_HARDWARE = 2
}
[StructLayout(LayoutKind.Sequential)]
public struct MOUSEINPUT
{
private InputType type;
public UInt32 dx;
public UInt32 dy;
public UInt32 mouseData;
public MouseEvent dwFlags;
public UInt32 time;
public IntPtr dwExtraInfo;
}
public static class MouseInput
{
[DllImport("User32.dll")]
public static extern UInt32 SendInput(UInt32 nInputs, MOUSEINPUT[] pInputs, int cbSize);
private static Point Normalize(Point pt)
{
return new Point((pt.X * 65535) / Screen.PrimaryScreen.Bounds.Width,
(pt.Y * 65535) / Screen.PrimaryScreen.Bounds.Height);
}
public static void Move(Point pt)
{
pt = Normalize(pt);
MOUSEINPUT[] input = new MOUSEINPUT[1];
input[0].dx = Convert.ToUInt32(pt.X);
input[0].dy = Convert.ToUInt32(pt.Y);
input[0].dwFlags = MouseEvent.MOUSEEVENTF_MOVE | MouseEvent.MOUSEEVENTF_ABSOLUTE;
SendInput(1, input, Marshal.SizeOf(input[0]));
}
public static void Click(Point pt)
{
Move(pt);
pt = Normalize(pt);
MOUSEINPUT[] input = new MOUSEINPUT[2];
input[0].dx = Convert.ToUInt32(pt.X);
input[0].dy = Convert.ToUInt32(pt.Y);
input[0].dwFlags = MouseEvent.MOUSEEVENTF_LEFTDOWN | MouseEvent.MOUSEEVENTF_ABSOLUTE;
input[1].dx = Convert.ToUInt32(pt.X);
input[1].dy = Convert.ToUInt32(pt.Y);
input[1].dwFlags = MouseEvent.MOUSEEVENTF_LEFTUP | MouseEvent.MOUSEEVENTF_ABSOLUTE;
SendInput(2, input, Marshal.SizeOf(input[0]));
}
}To simulate a click at 100,100 therefore you'd do this:
MouseInput.Click( new Point( 100, 100 ) ); I don't think you can do it without moving the cursor. You could save the current mouse position, click at the point where you want to click and then move right back to the saved position!
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Hi,
Almost forgot to thank you! So.. Thanks!
Nice code 
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