|
The call will try to establish a Tcp connection to the specified url and port. The url is used to know to which host (computer) the connection should be established. The Url can be a normal adress (like http://www.codeproject.com) or like in your case an ip adress (actually the first one will be resolved to an ip adress on the fly). The ip "127.0.01" is always the local machine - thus the connection will be established to yourself. As every host can have multiple connections open the port number differentiates these connections.
Probably this description is a bit too simple (I'm no real expert on this) but it should give you a rough idea.
|
|
|
|
|
hi all,
i have an app and am wondering the best way to periodically check for updates or other events.
should i use the windows scheduller or just have a thread that sleeps alot? or another way?
which is best practice?
more often than not the period between checks would be once or twice a day. this i think is along time to sleep a thread.
any ideas pls?
kind regards,
g00fy
|
|
|
|
|
Personally I wouldn't use the scheduler. You have more control when doing it yourself.
You could even avoid having your own thread by using a System.Threading.Timer[^] class which manages this internally.
|
|
|
|
|
Hi
Is it possible to have a check box in a listview (windows application) column header and while checking this, all the check boxes in the column will be checked?
|
|
|
|
|
I don't think it is..
You could either drop a small button on to although that would be rubbish.
You could hide the column headers and have the first row of data being a dummy row, when you check its checkbox it checks all the others.
-- modified at 9:16 Friday 21st April, 2006
|
|
|
|
|
i have this column in an excel worksheet that contains hyperlinks to other documents. the rest of the columns contain regular values (e.g. Roger). the whole worksheet iotself would be exported to a datagrid using c#.getting these regular text values to display is fine but the probelm is that i can't get the url behind the hyperlink...
help me please.
thanks.
|
|
|
|
|
How are you fetching the data? If you do it with OleDb you probably won't have any luck. I think you need to use the Interop assemblies for Office.
|
|
|
|
|
Hello,
I have 3 classes for example :
public MainClass
{
private int maximum = 100;
private int minimum = 0;
private int valueC = 50;
[Browsable(true)]
public int Maximum
{
get {return maximum ;}
set {maximum =value;}
}
[Browsable(true)]
public int Minimum
{
get {return minimum ;}
set {minimum =value;}
}
[Browsable(true)]
public int ValueC
{
get {return valueC ;}
set {valueC=value;}
}
public MainClass()
{
}
}
public ElementsClass
{
private PropertiesClass elementsProperties;
[Browsable(true)]
public PropertiesClass ElementsProperties
{
get {return elementsProperties;}
set {elementsProperties =value;}
}
public ElementClass()
{
}
}
public PropertiesClass
{
private bool visible = true;
private Color colorC = Color.Black;
private bool blink = true;
[Browsable(true)]
public bool Visible
{
get {return visible;}
set {visible =value;}
}
[Browsable(true)]
public Color ColorC
{
get {return colorC;}
set {colorC=value;}
}
[Browsable(true)]
public bool Blink
{
get {return blink;}
set {blink=value;}
}
public PropertiesClass()
{
}
}
In the MainClass i want to include a ElementClass property but i must be able to have an ElementClass array or collection and each ElementClass has the 3 PropertiesClass properties.
What i don't know how to do  is the next:
I want to show the MainClass properties in a PropertyGrid, the ElementsClass data must open a new window like a collection editor showing a list of all the ElementsClass objects that i have created.
Finally when i select some element in the list, the propertyGrid must show the PropertiesClass properties (visible, colorC, blink).
Can somebody help me with this?
Regards,
Alberto Martinez
|
|
|
|
|
First you could have searched for collection editor[^] here on CodeProject. That gives you several links.
Here[^] and here[^] are two good articles which deal especially with this topic.
|
|
|
|
|
I'm trying to optimize some code that I've written and I've come across a style that I use ~20 or times that will be run ~100 or so times during the full execution of my code(a VSTO excel spreadsheet).
Here's the common syntax
If (complicated boolean statement)
{
form.attribute = true;
}
else
{
form.attribute = false;
}
I was wondering whether using something like this would make any difference
form.attribute = complicated boolean statement.
Could eliminating the if/else actually noticably speed up my code, or is this change so insignificant that I shoul concentrate on some of the other pieces of code to eliminate database calls and recomputation when it isn't necessary?
|
|
|
|
|
You can safely remove the if-else clause, but it won't result in a noticable performance increase.
regards
modified 12-Sep-18 21:01pm.
|
|
|
|
|
The difference in performance is so very small that it's more a matter of taste and style.
The second code is a bit more efficient, mainly because it doesn't contain a jump. If you only run the code a hundred times though, the difference in execution time is so small that it's not even possible to measure.
---
b { font-weight: normal; }
|
|
|
|
|
Hi,
my problem comes from the fact that I'm trying to make my progressbar progress while I'm scanning directory files.the awk thing is that my scan function is defined within my datalayer as a dll.I want my progress bar to follow the files processing. I first thought about threads but could'nt move on.probably got allergy for threads.can anybody help?
thanks in advance
|
|
|
|
|
If you have "access" to the source of the datalayer dll you could create some events. You can trap these events in your app then, like what the WebBrowser does with it's DocumentProgress (or something like that) event.
Ed
|
|
|
|
|
Your problem seems to be a perfect candidate for the BackgroundWroker thread control that's newly available in the .NET 2.0 framework.
Using this controll is rather pain free. It's literally a matter of a few click to get yourself set up with a background worker thread that is going ot perform the scan in background for you. The way you use this control is you have to provide three functions to handle three events. One is the actual worker function (this will be the function that scans the files). Then There is a function that will be called when the progress changes. And the last one is going to be a function that will be called when the thread ahs finished processing. So in the actual worker function you will need to call the ReportProgress function that will basically marshal your call and eventually fire the second event (the progress changed event) on the appropriate thread. It's that easy.
Feel free to google for the BackgroundWorkerThread samples online
Good luck
Mikk
----
www.muzikstor.com
|
|
|
|
|
Assume I send a ICMP packet that request timestamp, then I receive timestamp reply.
I can see type, code, identifier, sequence, originate time, receive time...
I can get a receive time.
and I Knew that I set a originate time.
how set a originate time value??
DateTime.Now??
DateTime.Now.ToFileTime()??
plz^^ Can you recommend me??^^
Nothing!! But gonzo!!
-- modified at 16:18 Thursday 20th April, 2006
|
|
|
|
|
hey hi, wanted to ask you guys that whenever I save some path in a column named "Picture", then it doesnt allow me to do so. how can I do it, or what type of column will i have to set it as?
regards,
noman
|
|
|
|
|
Standard question #2:
What error message do you get?
What data type have you chosen for the field?
---
b { font-weight: normal; }
|
|
|
|
|
hi, first of all, i wasn't sure in which forum i could place my article, so i put it in this one, because i'm working with C#...i hope someone could help me 
the problem is that i simply can't create a Device in my app, it send me an error about "WindowsApplication1.Form1 is not an IntPtr..look i do something like this
Device dev = New Device(0, DeviceType.Default, this, CreateFlags.None, presentParams)
and the problem is in the third parameter ("this") , but then i don't know what to put in there...and by the way jeje...what is a IntPtr??
i'd really appreciate your help
thanks!
|
|
|
|
|
An IntPtr is a pointer to a memory location; it basically corresponds to a pointer in C++. It is 4 bytes on a 32-bit operating system, and 8 bytes on a 64-bit operating system.
What DirectX really requires is a C++ HWND object. The HWND is, guess what, a pointer to the handle of a window: DirectX is asking you want window to draw on, so it needs the window's handle.
A Windows Form (i.e. your Form class) is just a glorified window with a normal HWND under the covers. You can access the window handle (i.e. HWND) of your form using the form.Handle property.
Device dev = New Device(0, DeviceType.Default, this.Handle, CreateFlags.None, presentParams)
Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Is Jesus the Jewish Messiah?
The apostle Paul, modernly speaking: Epistles of Paul
Judah Himango
|
|
|
|
|
I have written an application using .NET CF that needs to write back files on a regular basis to a network share, ie \\server\data\foo.txt
How do I specify the username and password of an account that can access the share, so that the device can save to it?
Currently I have to open the share using Explorer on the PDA before I can save to it.
Thanks in advance...
Chris
|
|
|
|
|
Is there a way to import/export a MS Access report so that it can be modified in Crystal Reports XI?
Code Toad
|
|
|
|
|
Hey everybody.
I'm trying to print a document with a right-to-left language. I want to use the drawString() method, but it flips special signs like "." and "!" etc. just like in every other place in windows using this language (and left-to-right mode).
my question is, is there a right-to-left drawString()? or a way to turn this method into right-to-left?
my current solution is using drawString char-by-char using a method I wrote, but it seems like "Bad Programming" and very unefficient.
any ideas ???
Thanks!
|
|
|
|
|
Hi!
I need to flip or mirror a bitmap horizontally loading it from a file and saving the flipped one into another file.
I've seen some piece of code that is supposed to do this, but it uses "unsafe" code. Is there any way to do it without unsafe code?
Here's the code I found:
<br />
public static bool Invert(Bitmap b)<br />
{<br />
System.Drawing.Imaging.BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height),<br />
System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);<br />
int stride = bmData.Stride;<br />
System.IntPtr Scan0 = bmData.Scan0;<br />
unsafe<br />
{<br />
byte * p = (byte *)(void *)Scan0;<br />
int nOffset = stride - b.Width*3;<br />
int nWidth = b.Width * 3;<br />
for(int y=0;y<b.Height;++y)<br />
{<br />
for(int x=0; x < nWidth; ++x )<br />
{<br />
p[0] = (byte)(255-p[0]);<br />
++p;<br />
}<br />
p += nOffset;<br />
}<br />
}<br />
b.UnlockBits(bmData);<br />
return true;<br />
}<br />
Thanx for any help!
|
|
|
|
|
If you surround your code with <pre> and </pre> then the post will retain your spacing. So looking at your formatted code, I end up with mismatch squirrly brackets:
sergestusxx wrote:
public static bool Invert(Bitmap b)
{
System.Drawing.Imaging.BitmapData bmData =
b.LockBits(new Rectangle(0, 0, b.Width, b.Height),
System.Drawing.Imaging.ImageLockMode.ReadWrite,
System.Drawing.Imaging.PixelFormat.Format24bppRgb);
int stride = bmData.Stride;
System.IntPtr Scan0 = bmData.Scan0;
unsafe
{
byte * p = (byte *)(void *)Scan0;
int nOffset = stride - b.Width*3;
int nWidth = b.Width * 3;
for(int y=0;y {
for(int x=0; x < nWidth; ++x )
{
p[0] = (byte)(255-p[0]);
++p;
}
p += nOffset;
}
}
b.UnlockBits(bmData);
return true;
}
}
Looking at the code in general (ignoring the obvious) the reason your unsafe is due to the use of the pointer. (something prefered to be avoided when possible)
Having said that, it looks like it is the only way that you can turn a bitmap into an array-addressable object for inversion.
This looks like a case where unsafe is not avoidable.
-- modified at 13:44 Thursday 20th April, 2006
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
