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Performacne(Speed) wise which one is best among For loop and foreach
Jey
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They exist to service different needs. However, in some situations you can use both. for(int i=0; i<array.Length; i++) is faster for iterating over an array, but then you have to do more work as you have to extract the values out of the array manually.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
-- modified at 4:34 Monday 29th May, 2006
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Actually, Brad Abrams here[^] says that for arrays, for and foreach generate identical code for iteration.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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Interesting - I've never check the MSIL but I've seen performance stats on code that suggest the for() is faster than foreach() for arrays - I guess it was talking about ArrayList and I didn't pick up on that.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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Hi all,
How do i send more than one command to command prompt through C#. I know how to send one command at a time but i need to send two. One needs to change my current directory path from: c:\Documents and settings to: c:\program files\progressive projects\progress\reports\reporttemplates here i need to run a batch file but this part i know...
ProcessStartInfo startInfo = new ProcessStartInfo("cmd.exe");
// /c switch sends a command
startInfo.Arguments = "/C " + command;
// redirect messages to this program
startInfo.RedirectStandardError = true;
startInfo.RedirectStandardOutput = true;
//don't execute using shellexecute API
startInfo.UseShellExecute = false;
//Don't open command prompt window
startInfo.CreateNoWindow = true;
System.Diagnostics.Process p = System.Diagnostics.Process.Start(startInfo);
string output = p.StandardOutput.ReadToEnd();
string error = p.StandardError.ReadToEnd();
p.WaitForExit();
if (output.Length != 0)
shellControl1.WriteText(output);
else if (error.Length != 0)
shellControl1.WriteText(error);
thank you in advance
He who laughs last...
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You could send a batch file that does everything that you want. Or you could redirect standard input and push the commands to the input stream (I've never tried that so I'm only guessing that it would work)
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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huh????
im quite new to this... Be gentle
He who laughs last...
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My two suggestions expanded:
1. You are calling cmd.exe and sending it a command to execute. Instead of wondering how to send it more than one command, why not put all your commands in a batch file and send cmd.exe the batch file to execute
2. Call cmd.exe and redirect the StandardInput. You can then write commands to the cmd.exe process as if you were typing on the command prompt itself. (However, I've never tried this so I can't say with 100% certainty that it will work or be without problems)
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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okay thanks, i'll give it a shot
He who laughs last...
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after filtering dataview, when i retrive the dataview by a loop. i get the orginal dataview contents. but if i use it as a datasource of a datagrid then i can found the filtered data.plz fix the problem...
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try the following code
int i=0;
IEnumerator ienm = dtv.GetEnumerator();
while(ienm.MoveNext())
{
MessageBox.Show(dtv[i].Row["column name"].ToString());
i++;
}
here dtv is filtered dataview
rahul
-- modified at 5:21 Monday 29th May, 2006
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thanks for ur help. but now i want to put this values of dataview in a datatable.but how i can not do it. cause i am new in c#.plz help me...
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i m new in c#.
working in this topic.
but i don't know from where and how to start.
plz help me or give initial comment!
alok
-- modified at 4:23 Monday 29th May, 2006
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What kind of file is that (.msg) ?
If that file is a binary file, you can read it using BinaryReader and write it to text again using StreamWriter.
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If you just want to rename the file, use File.Move()
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hi all,
how i add some day to a given date ?
let's say i have 29/05/2006 and i want to find the corresponding date 40 days from now on ?
is there a method to add the given days count to initial date ?
help please ...
thanks in advance,
bye.
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u can try
DateTime dt=Convert.ToDateTime("29/05/2006").AddDays(40);
rahul
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DateTime.Now.AddDays(40);
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u can use :-
System.DateTime.Parse( "29/05/2006" ).addDays( 40 )
i think u get ur solution.
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I am working on a FTP client that works great but when I use file drop from windows explorer the application crashes and ends. The error breaks at the Application.Run(new Mainform); and gives me the following error: "An unhandled exception of type 'System.Runtime.InteropServices.SEHException' occurred in system.windows.forms.dll
Additional information: External component has thrown an exception." If I put a try catch around that I get this error message Exception.Message = "External component has thrown an exception."
I am using Visual Themes and are sure that that is the problem.
<br />
[STAThread]<br />
static void Main() <br />
{<br />
try<br />
{<br />
Application.EnableVisualStyles();<br />
Application.DoEvents();<br />
Application.Run(new MainForm());<br />
}<br />
catch(Exception Ex)<br />
{<br />
MessageBox.Show(Ex.Message,"Runtime Error.",MessageBoxButtons.OK,MessageBoxIcon.Error);<br />
}<br />
}<br />
When I take the EnableVisualStyles(); out it works fine. Also when I do a file drop, my progressbar losses the Visual Theme.
How do I get around this and still use the Visual Themes?
Here is my Drop code:
<br />
private void listView1_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)<br />
{<br />
if( e.Data.GetDataPresent(DataFormats.FileDrop, false))<br />
{<br />
string[] files_str = (string[])e.Data.GetData(DataFormats.FileDrop);<br />
<br />
foreach(string file_str in files_str)<br />
{<br />
FileInfo droppedFile = new FileInfo(file_str);<br />
<br />
if(droppedFile.Exists)<br />
{<br />
UploadFile(droppedFile);<br />
}<br />
else if(droppedFile.Directory.Exists)<br />
{<br />
DirectoryInfo droppedDirectory = new DirectoryInfo(file_str);<br />
<br />
if(droppedDirectory.Exists)<br />
{<br />
UploadDirectoryChanges(droppedFile.Directory);<br />
}<br />
}<br />
else<br />
{<br />
MessageBox.Show(file_str +"\nis not recognized as a valid file drop.","Unsupported File drop!",MessageBoxButtons.OK, MessageBoxIcon.Information);<br />
}<br />
}<br />
}<br />
}<br />
Leon v Wyk
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Hi,
can v create an array or collection of SqlParameter and how? if so then how it will be added to the SqlCommand object?
If somebody know about article(s) specifically for SqlParameter then Please let me Know!
Thanks,
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Check This
http://www.codeproject.com/dotnet/NET_Data_Access.asp?df=100&forumid=100484&exp=0&select=923320
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Your linked article deals with the Data Access Application Block. The OP never mentioned anything about that.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question."
--Charles Babbage (1791-1871)
My: Website | Blog
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thanks 4 ur warning 
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Thanks for reply albCode!
but actually i'm not working with stored procedures.
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