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But... when you call ToString().SubString() you are of course using string again.
The fact that the UI thread becomes active is probably no indication of the state of your program. Visual Studio need not hang in order for your program to be busy.
However, doing this a single time on a string of size on the order of thirty thousand characters should not take long at all.
I wrote a simple console app to test and with a string of 30000 characters and taking 28000 of them for the substring it takes about 0.01 seconds on my (cheapass) machine.
class Program
{
static void Main(string[] args)
{
int size = 30000;
int take = 28000;
char[] chars = new char[size];
for (int i = 0; i < size; i++) chars[i] = '.';
string s = new String(chars);
Stopwatch w = Stopwatch.StartNew();
s = s.Substring(0, take);
Console.WriteLine(w.Elapsed);
Console.ReadKey(true);
}
}
I'm at a complete loss as to how this can happen. Nor can I reproduce the problem you're having. So it seems like it might be time to reinstall your system... or at least try to take the code to another computer and compile it there and see if you still have the problem.
Should all this fail, you can always attempt using a char[] instead and implement "substring" yourself; after all it's a simple matter.
void substring(char[] src, char[] dest, int startIndex, int count)
{
for (int i=0; i < count; i++)
dest[i] = src[i + startIndex];
}
Obviously you should add range checking to that if you want it proper.
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Re-reading your previous postings makes me wonder if what really happens is that your program terminates. I had not noticed that you're calling this on another thread, but depending on how you do this, what type of application it is, and what framework version you are using, it migth be possible.
I don't know all the different possibilities and how they're handled, but I do remember we created threads ourselves in our asp.net application like this: Thread t = new Thread(new ThreadStart(method)); t.Start(); and this actually killed the application if any unhandled exception occured during method. [EDIT] I forgot to say this was on the 1.x Framework and I believe it has changed since. [/EDIT]
In other words, if we invoked String.SubString and passed any invalid arguments, such as a length that requires going beyond the end of the string (try to take 30001 from the 30000 long string), it would immediately terminate the application. I don't remember how VS would behave if debugging this but it seems possible it would just go all blank and not show any messages or anything.
So you should at least test this hypothesis by making sure you wrap the entire method in a try-block and add a catch at the end where you break into the debugger and dump the exception to debug output, like this:
try
{
....
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
Debugger.Break();
}
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By the way, your signature uses the bitwise and where a logical and is required - no doubt caused by the fact that & is the character that marks an entity reference in HTML, so that && actually becomes && in source... 
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hi
i have one dropdown list and i get the data from the database in
dropdownlist. now i need to select the data from the dropdown list
and after selecting i need to insert that text into the database.
i try ddlproduct.selecteditem.text where ddlproduct is a drodownlist
id but i get the first value from the dropdown if i select some other
value i am getting the first value only
i forget to tell one thing i am using c#
please help me with some code and example
thanks
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I want to know, how can I,
How can i add penel in status bar on design time not with code in window application.
I tried to add columns through property but i couldn't, i did't get any option regarding to penel in property window.
Please do replay.
thanks
modified on Thursday, April 9, 2009 3:43 AM
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It depends on what you mean. I'm assuming you mean the StatusStrip.
If you just want a new label on it, then click it in the IDE and click the dropdown button that appears and choose Status Label.
If you want to add an actual panel to it, then that's a little more difficult. All items hosted in the StatusStrip derive from ToolStripItem. I've never tried this tutorial[^] but it might be what you need.
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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Yeah i am trying Status Strip for status bar where i can show status i want to add penal one left one right.
For doing this what i should do???
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Add three labels as I described above and set the second one's Spring property to true and clear it's Text.
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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Dear,
Thanks I have done it.
Sajjad
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Hi,
How can i show media player control in my application?
Thankyou
YPKI
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Hi,
Kindly let me know that, How may I check days of month using c# commands for example:
January ends on 31
February ends on 28
March ends on 31
April ends on 30
e.t.c.
Thank you in advance
(Riaz)
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How about this[^] static method: System.DateTime.DaysInMonth(int year, int month)
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)
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hello
Trying to switch my project over from "System.Data.OracleClient" to ODP.NET "Oracle.DataAccess.Client". It failed from get go (see this article from Oracle http://www.oracle.com/technology/oramag/oracle/06-winsupp/win06odp.html[^]):
<br />
DbProviderFactory oDbFactory = DbProviderFactories.GetFactory("Oracle.DataAccess.Client");<br />
(As in article from Oracle: )[^]
Keep getting System.Configuration.ConfigurationErrorsException saying:
<br />
"Failed to find or load the registered .Net Framework Data Provider."<br />
I checked my assembly cache it's there and also referenced in my machine.config (yes I have to add them myself):
<br />
D:\Program Files\Microsoft Visual Studio 9.0\VC>gacutil /l | findstr Oracle<br />
System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77<br />
a5c561934e089, processorArchitecture=x86<br />
CoreLab.Oracle, Version=3.50.12.0, Culture=neutral, PublicKeyToken=09af7300eec<br />
23701, processorArchitecture=MSIL<br />
...<br />
See, I'm sure the assembly has been installed and in machine.config I used the right key/version. Weird thing is, Red Gate's reflector won't allow me to "Open" (from Cache) the dll, this prevented me to check if there exists "Oracle.DataAccess.Client.OracleClientFactory" within the assembly. So I select "Copy Local" and examined the dll from "Red Gates Reflector". There's no "Oracle.DataAccess.Client.OracleClientFactory" in the dll ???
See here for a Reflector screencap if you don't believe it: http://www.codeguru.com/forum/showthread.php?p=1831221#post1831221[^]
Reflector can be downloaded here: http://www.red-gate.com/products/reflector/[^]
modified on Thursday, April 9, 2009 6:32 AM
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errr....
I added this to app.config
<br />
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><br />
<qualifyAssembly partialName="Oracle.DataAccess" fullName="Oracle.DataAccess, Version=2.111.6.20, Culture=neutral, PublicKeyToken=89b483f429c47342"/><br />
</assemblyBinding>
Seems to have fixed the problem - not sure if I understand why... suppose I need to readup on assembly binding.
dev
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hi all
i want to use the following code to set the time of the system by some numericUpDown (hour,minute,second) objects that user input, but i don't know where is the problem when i set the time it changes but it does n't correctly change, please have a look at it, it should be something that i may do not know about it, i just have changed a code that i found on the internet, here is the code:
[StructLayout(LayoutKind.Sequential)]
public struct MyDateTime
{
public ushort Year;
public ushort Month;
public ushort wDayOfWeek;
public ushort Day;
public ushort Hour;
public ushort Minute;
public ushort Second;
public ushort Milisecond;
}
[DllImport("kernel32.dll", EntryPoint = "SetSystemTime", SetLastError = true)]
private static extern bool SetSystemTime(ref MyDateTime st);
[DllImport("kernel32.dll", EntryPoint = "GetSystemTime", SetLastError = true)]
private extern static void GetSystemTime(ref MyDateTime sysTime);
MyDateTime Persian;
.
.
.
GetSystemTime(ref Persian);
Persian.Hour = (ushort) hour.Value;
Persian.Minute = (ushort) minute.Value;
Persian.Second = (ushort) second.Value;
SetSystemTime(ref Persian );
thank you everybody
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I don't know the structure the winapi uses for this, but I suppose I would look for clues by seeing how the method to *get* system time works. Or just double-check the structure. It immediately seems odd to me that it would use shorts for day of week, day, hour, minute, and second, all of which logically require just a byte, but I have almost no experience with system level programming so it may well be that I simply don't know what I'm talking about!
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Hm... according to this it would appear the structure is even less compact and uses four bytes (on a 32-bit platform) for each..??
Best of luck!
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I see nothing wrong in what you are doing. Its just that, when you use SetSystemTime(), the time set is UTC - not your local time. So, in order to set your local time, then you need to calculate the difference between your local timezone and UTC (use Offset class to calculate the difference like
Offset diff = DataTime.Now - DateTime.UtcNow). Once you know the time difference, update the hours and minutes by the Offset.Hours, Offset.Minutes and you will get the correct local time set. Hope that helps!!
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Hi guys,
Is there any way through which I can see the list of hidden files in a drive or folder with a console application?
Your help will be appreciated,
Rajdeep.NET
Edit: Are only files with .ini extension invisible? And why do they remain hidden.....Hmmmmmm....A gr8 mystery.....maybe only for me! Help me in this regard somebody!
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By using GetAttributes method you can check it.
mailto: anubhava.prodata@gmail.com
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Rajdeep.NET wrote: Is there any way through which I can see the list of hidden files in a drive
Use Directory.GetFiles. It retruns all files irrespective of hidden status. After getting the file, you need to supply the path into a FileInfo class and check Attributes[^] property. If it has Hidden attribute, consider the file as hidden.
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Hi
I'm using list view to display files and folders of a directory. I suppose to provide an option for sorting that is when i hit column header it should get sort and group which means files should be club together and folders as like XP Windows explorer sorting. For me Name,Size sorting are works fine but date sorting doesn't looks good as files and folders are shuffled together but name and size are works as expected. Please advise.
Thanks
...
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