C# Discussion Boards - CodeProject

fftongzhi13-Sep-02 0:03

13-Sep-02 0:03

Is that AppDomain.SetCachePath(string)??
It doesn't work too.
yes ,Eric made a loader,but what is the key?? Confused | :confused:

lost my way

Re: how to load a dll at runtime

leppie13-Sep-02 0:11

leppie

13-Sep-02 0:11

fftongzhi wrote:
Is that AppDomain.SetCachePath(string)??

No

You need to set this via AppDomainSetup in AppDomain.CreateDomain(). I think it has to be done via that function else it will not function.

Its been a while (May) since I attempted this.

fftongzhi wrote:
yes ,Eric made a loader,but what is the key??

I cant remember the exact details, but he did it, so I guess thats necessary Smile | :)

Re: how to load a dll at runtime

fftongzhi15-Sep-02 18:36

fftongzhi

15-Sep-02 18:36

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp03122002.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp05162002.asp

Eric ,he is a expert.;)

lost my way

Re: how to load a dll at runtime

fftongzhi12-Sep-02 23:06

fftongzhi

12-Sep-02 23:06

Any body can help me?????
ooooooooooh!! Sleepy | :zzz:

lost my way

Running VS .NET on NT 4.0

Zinj10-Sep-02 19:30

Zinj

10-Sep-02 19:30

I've been told that VS .NET won't work on NT 4.0. Has somebody installed it successfully?

BTW. Do you have any idea, how can I install NT4.0 on a machine that already has Windows XP, without do destroy the WinXP installation? Is it possible at all?

Any tips are appreciated, thank you!

Re: Running VS .NET on NT 4.0

James T. Johnson10-Sep-02 19:33

James T. Johnson

10-Sep-02 19:33

VS.NET should be fine, but ASP.NET won't run on NT 4.0 (IIS 4.0)

No idea as to your second question.

James
"And we are all men; apart from the females." - Colin Davies

Re: Running VS .NET on NT 4.0

leppie10-Sep-02 21:12

leppie

10-Sep-02 21:12

Zinj wrote:
BTW. Do you have any idea, how can I install NT4.0 on a machine that already has Windows XP, without do destroy the WinXP installation? Is it possible at all?

Try a emulator like VMWare. Very slow though. But OK for testing Smile | :)

OR you can be adventurous and install NT4 on a different partition, it might overwrite the bootloader (i cant remember now ), but you can run XP setup up to first reboot and cancel, the boot loader should be replaced and existing XP boot entry should still be there (make a backup of boot.ini). Wow, its been a few years since I worked on that stuff Smile | :)

CryptHashMessage and C#

User 988510-Sep-02 14:24

User 9885

10-Sep-02 14:24

I have C++ code that uses the function CryptHashMessage that I am trying to port to C#. Do anyone know of something in C#, that does the same thing?

I believe I searched the System.Security.Cryptography completely.

Thomas

modified 29-Aug-18 21:01pm.

Formatting TimeSpan.ToString()

Ingram Leedy10-Sep-02 11:48

Ingram Leedy

10-Sep-02 11:48

I want to format TimeSpan to output "hh:mm:ss", but when I use the generic TimeSpan.ToString() method, it returns "hh:mm:ss.ffffff". I don't need the fractions of seconds, just the plain seconds.

If I try to do something like,

textBox1.Text = span.ToString("hh:mm:ss");

I get a error,
//error - No overload for method 'ToString' takes '1' arguments.

ToString is listed as overridden but not overloaded in the TimeSpan help
docs with VS.Net.

I've tried converting to,

DateTime dt = new DateTime(span.Ticks);
labelClock.Text= dt.ToString("hh:mm:ss");

But this results with something like, "12:00:00".

Any suggestions?

Re: Formatting TimeSpan.ToString()

leppie10-Sep-02 14:18

leppie

10-Sep-02 14:18

Try this

string tempstr = timespan.ToString();<br />
labelClock.Text = tempstr.Substring(0, tempstr.LastIndexOf(".") - 1);

or ... try this (I'm just guessing Smile | :)

)

timespan = Timespan.FromSeconds((int)timespan.TotalSeconds);

Re: Formatting TimeSpan.ToString()

Paul Riley10-Sep-02 15:05

Paul Riley

10-Sep-02 15:05

leppie wrote:
tempstr.Substring(0, tempstr.LastIndexOf(".") - 1);

Dangerous. Days and fractions of seconds are optional. You could end up getting 8.01:01:01 (8 days, 1 hour, 1 minute, 1 second) and just return "8".

I'd guess the best way is
string str = String.Format("{0:00}:{1:00}:{2:00}", timespan.Hours, timespan.Minutes, timespan.Seconds)
but there may be a better way than that.

Paul

Re: Formatting TimeSpan.ToString()

Ingram Leedy11-Sep-02 3:13

Ingram Leedy

11-Sep-02 3:13

Thanks leppie and Paul -- That will work, yea I guess this is one for the FAQ on .NET.

DragDrop reorder nodes

Ryan Cromwell10-Sep-02 10:00

Ryan Cromwell

10-Sep-02 10:00

I am looking for an intuitive way to allow users to reorder a treeview by dragging and dropping, though they can already drop on other nodes and update the hierarchy. So dropping on an item and inserting it before is not really an option. I currently have it such that when you dragover and right click you get a context menu that lets you insert before, but i'd like somehow to figure out when i'm inbetween two nodes. Anyone have any ideas.

Tanka

Re: DragDrop reorder nodes

Stephane Rodriguez.10-Sep-02 22:32

Stephane Rodriguez.

10-Sep-02 22:32

I am afraid the treectrl we know is not designed for rearrangement. What I would see is, when drag has begun, the treectrl folds and unfolds itself according to the mouse position, add space between items then show a xor drawn item (or set of items) to preview what the treectrl would look like with this item dropped here.

This requires work, but this would give you a lot of audience Cool | :cool:

and attention... Cool | :cool:

MS quote (http://www.microsoft.com/ddk) : As of September 30, 2002, the Microsoft® Windows® 2000 DDK, the Microsoft Windows 98 DDK, and the Microsoft Windows NT® 4.0 DDK will no longer be available for purchase or download on this site. Support for development will ship at the same time as the Windows XP Service Pack 1 (SP1) release.

Re: DragDrop reorder nodes

Ryan Cromwell11-Sep-02 4:35

Ryan Cromwell

11-Sep-02 4:35

I'll do what I can. I'm looking for quite a bit more in a Tree control (ie multiple checkboxes) so I may have some fun later on. Thanks though

converting string to byte[]

User 988510-Sep-02 9:17

User 9885

10-Sep-02 9:17

I have a function that takes a byte[], but the data i want to pass in is a string.

How do I convert?

Thomas

modified 29-Aug-18 21:01pm.

Re: converting string to byte[]

Nnamdi Onyeyiri10-Sep-02 9:31

Nnamdi Onyeyiri

10-Sep-02 9:31

byte[] bytes = new byte[mystring.length];
char[] chars = mystring.ToCharArray();
for(int i = 0; i < mystring.Length; i++)
bytes[i] = (byte)chars[i];

Big Grin | :-D

Suspicious | :suss: Email: theeclypse@hotmail.com URL: http://www.onyeyiri.co.uk
"All programmers are playwrights and all computers are lousy actors."

Re: converting string to byte[]

User 988510-Sep-02 9:33

User 9885

10-Sep-02 9:33

i miss

byte* x = (byte*)p;

Smile | :)

In the above list, I used

chars.CopyTo(bytes, 0)

and it bombed!!!

Frown | :-(

This should work.

Thanks

Thomas

modified 29-Aug-18 21:01pm.

Re: converting string to byte[]

Paul Riley10-Sep-02 9:35

Paul Riley

10-Sep-02 9:35

string str = "This is a test";
byte[] byteArray = new byte[str.Length];
for (int i=0;i < str.Length;i++)
    byteArray[i] = (byte) str[i];

This has to be the most asked question in this forum. It just doesn't seem quite worth writing an article for, does it?

Paul

Re: converting string to byte[]

Rüpel12-Sep-02 2:16

Rüpel

12-Sep-02 2:16

as far as i remember string is unicode. thus each character consists of 2 bytes. your code may work for ascii-characters, but the real solution would rather be something like:

string str = "This is a test";
byte[] byteArray = new byte[<font color=red>2*</font>str.Length];
for (int i=0;i < str.Length;i++)
{
    <font color=red>int c = (int)</font>str[i];
    byteArray[<font color=red>2*</font>i] = (byte) c;
    <font color=red>byteArray[2*i+1] = (byte)(c>>8);</font>
}

or something similar...haven' tried the above code... Roll eyes | :rolleyes:

looking at the system.text-namespace is the best i believe... Wink | ;)

:wq

Re: converting string to byte[]

Paul Riley12-Sep-02 2:47

Paul Riley

12-Sep-02 2:47

Interesting point. I suppose it depends what you want the byte array for. If it's to store in a database then you might want to compress it.

Incidentally, your code wouldn't work either (at least I don't think so). str[i] returns a char so the high-byte of your int would always be zero.

This is fine in most cases but you might as well say

byteArray[2*i] = (byte) str[i];
byteArray[2*i+1] = 0;

However all this is fairly acedemic since it was pointed out that System.Text.Encoding.ToByteArray.GetBytes(str) seems to do the job perfectly. Smile | :)

Paul

Re: converting string to byte[]

James T. Johnson12-Sep-02 3:04

James T. Johnson

12-Sep-02 3:04

Paul Riley wrote:
str[i] returns a char so the high-byte of your int would always be zero.

char is unicode friendly, so the high-byte will depend on whether the text is ascii or unicode.

James
"And we are all men; apart from the females." - Colin Davies

Re: converting string to byte[]

Paul Riley12-Sep-02 3:12

Paul Riley

12-Sep-02 3:12

It is? Gawd-damn! Amazing the things you can go around not knowing, isn't it?

Apologies to anyone I've misinformed on this one.

Paul

Re: converting string to byte[]

Eric Gunnerson (msft)10-Sep-02 9:45

Eric Gunnerson (msft)

10-Sep-02 9:45

Look at System.Text.Encoding

Re: converting string to byte[]

Paul Riley10-Sep-02 9:52

Paul Riley

10-Sep-02 9:52

Eric Gunnerson (msft) wrote:
Look at System.Text.Encoding

Well... that's a bit cool, ain't it? Wink | ;)

Paul

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