C# Discussion Boards - CodeProject

Anthony Mushrow28-Nov-07 4:47

28-Nov-07 4:47

Its the curse of the slow loading times. It goes slow, or times out, so you click post again.
But unknown to you, your post has already made it onto the forum, but the page hadn't loaded on your machine.

My current favourite word is: PIE!

I have changed my name to my regular internet alias. But don't let the 'Genius' part fool you, you don't know what 'SK' stands for.
-The Undefeated

http://craptasticnation.blogspot.com/[^]

leckey28-Nov-07 4:51

leckey

28-Nov-07 4:51

If you look close the text is not exactly the same, so he really did post twice.

Seraph_summer28-Nov-07 5:07

28-Nov-07 5:07

I tried for the first time, it said it is too busy and sorry...
then I change a little bit and resend it again..

that is the true!!

Anthony Mushrow28-Nov-07 5:17

28-Nov-07 5:17

And i beleive you, i've done it myself.

You only ever see this type of double-post when you spot something and change it (i usually see a spelling mistake or something while i wait for it to load, i now must restrain myself, and wait) - otherwise the "you have already posted this message" screen comes up, and blocks your message.

My current favourite word is: PIE!

I have changed my name to my regular internet alias. But don't let the 'Genius' part fool you, you don't know what 'SK' stands for.
-The Undefeated

leckey28-Nov-07 14:53

leckey

28-Nov-07 14:53

Just an FYI that if it happens to please delete one of the posts.

Thanks! Smile | :)

Current Rant: "All Your Code Belong to Me"
http://craptasticnation.blogspot.com/[^]

form problem

Seraph_summer28-Nov-07 4:09

28-Nov-07 4:09

Several forms are displayed and each of them contains a plot. Just like the different figures in Matlab. Each them contains one button to edit the figure properties. When I click the edit button on the non-activated form, the no reponse from the edit button for the first click! That means I always have to click or actiavate the non-activated form first, then the edit button can response. Obviously, this is not convenient. How to avoid the this problem?

thanks.

Re: form problem

Paul Conrad28-Nov-07 14:36

Paul Conrad

28-Nov-07 14:36

Are you still having trouble with this?

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Re: form problem

Seraph_summer28-Nov-07 23:43

Avoiding TimeoutException...

28-Nov-07 23:43

Yes!
I can not solve this problem.
I think this is the common problem and I believe there should be the solution, but I can not find it.
I think most people can easily meet this problem once he use more forms and switch the process to different forms. But so far no one give me one solution for this.

thanks.

blackjack215028-Nov-07 3:20

blackjack2150

28-Nov-07 3:20

Hi.

I have a client for a web service written in C#. It's task is to send some files as SOAP attachments to the web service.

It works fine, but occasionally, if the files are large, the service throws a TimeoutException.
I saw that it is possible to set the timeout value to infinite(default is 15 seconds), thus avoiding the exception.

My question(s): Is it a "bad practice" to do this? I mean, if it solves these kind of problems, why isn't the timeout set to infinite by default? Are there any bad repercussions if I always do this?

Thanks.

pmarfleet28-Nov-07 3:31

pmarfleet

28-Nov-07 3:31

blackjack2150 wrote:
why isn't the timeout set to infinite by default?

Isn't it obvious? What if something goes wrong? The service will be waiting forever. By setting a timeout period, you guarantee that the service will eventually give up and resources can be reclaimed. Infinite timeouts are a bad idea. You would need to judge how long to set your timeout period based on the amount of time you expect is required to upload a file.

Paul Marfleet

"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush

Ennis Ray Lynch, Jr.28-Nov-07 4:22

Ennis Ray Lynch, Jr.

28-Nov-07 4:22

Web services are not designed to transfer large files. A simple solution is to have the web service return a URI to a file that can be downloaded outside of the SOAP wrapper.

Need a C# Consultant? I'm available.

Happiness in intelligent people is the rarest thing I know. -- Ernest Hemingway

blackjack215028-Nov-07 4:42

blackjack2150

28-Nov-07 4:42

Ennis Ray Lynch, Jr. wrote:
Web services are not designed to transfer large files. A simple solution is to have the web service return a URI to a file that can be downloaded outside of the SOAP wrapper.

Well, this particular web service has two. There's no other way. By large file I mean up to 4 MB. But in the future they intend to allow sending files up to 30MB.

Ennis Ray Lynch, Jr.28-Nov-07 4:46

Ennis Ray Lynch, Jr.

28-Nov-07 4:46

blackjack2150 wrote:
There's no other way

There are infinite amounts of other methods, I suggest that you strongly recommend one of the more acceptable ones before adjusting timeouts.

Need a C# Consultant? I'm available.

Happiness in intelligent people is the rarest thing I know. -- Ernest Hemingway

PIEBALDconsult28-Nov-07 5:27

PIEBALDconsult

28-Nov-07 5:27

You'll learn more by trying it. Big Grin | :-D

Binary to HEX

satsumatable28-Nov-07 2:56

satsumatable

28-Nov-07 2:56

Hi,

I have large amount of Binary data from which i need to generate HEX. What would be the best approach and more efficient way, if you have any samples please give me.

Anthony Mushrow28-Nov-07 3:13

28-Nov-07 3:13

Do you mean you have for example a text file full of 0's and 1's that you need to turn into a text file of Hex?

My current favourite word is: PIE!

I have changed my name to my regular internet alias. But don't let the 'Genius' part fool you, you don't know what 'SK' stands for.
-The Undefeated

satsumatable28-Nov-07 3:15

satsumatable

28-Nov-07 3:15

Yes you are right !! ., i have full of 1's and 0's.

blackjack215028-Nov-07 3:26

blackjack2150

28-Nov-07 3:26

Convert the bits to HEX digits in groups of four. Fill any data structure (string array, List<string>) will 16 values, which will have the binary codes for each HEX digit:

0000
0001
0010
...
1110
1111

Then traverse the string of ones and zeroes, group them by four and look at the index where the match occurs in your collection. That index is the corresponding hex digit. (For 11,12,..., 15 you replace them with A, B,..., F)

Good luck.

Anthony Mushrow28-Nov-07 3:31

AccessViolationException help

28-Nov-07 3:31

Well, i'm not sure on efficiency, but this is the only way i know:

string binary = "11001100";<br />
string hex = Convert.ToString(Convert.ToInt32(binary, 2), 16);

Basically, Convert.ToInt32, converts the string binary from a string of numbers with base 2, into an int.
Then Convert.ToString converts from an int, to base 16 (hex).
You may then want to pad left with 0's, i say want, you will probably need to.

So, you need to read a few characters (no less than 4) and convert it into hex as shown above, then write that to a file. Read the next set of characters, convert, write. And repeat.
8 characters would be 1 byte, 16 would be a half word (2 bytes) and 32 would be a word (4 bytes).

You may also need to do a little formatting on the string, i'm not sure if it comes out as "0xFF" or just "FF" (in the case of reading 8 characters, all 1's)

My current favourite word is: PIE!

I have changed my name to my regular internet alias. But don't let the 'Genius' part fool you, you don't know what 'SK' stands for.
-The Undefeated

Jimmanuel28-Nov-07 2:39

Jimmanuel

28-Nov-07 2:39

Somehow an app I've written is generating this exception and I could use some help figuring out how. In the VS debugger the app stops at the Application.Run line when the exception occurs and the Exception helper doesn't offer anything that seems useful, just a statement that memory is corrupt somewhere. The stacktrace doesn't offer much either other than to tell me that it's crashing in some native Windows Forms method (full stacktrace below). To make things even easier, I can't even nail down a repeatable process to recreate the exception, it just seems to happen every now and then when I perform certain steps in the GUI.

I've followed all of the suggestions that I can find on MSDN and the rest of Google, but to no avail. Things that I've already tried include removing all references to unmanaged code, reinstalling .Net and double buffering elements of the GUI. Can anyone offer any advice or ideas on how to diagnose this?

Stacktrace:
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at Sentry.SensorEditor.Program.Main()

MSDN[^]

Re: AccessViolationException help

Mike Dimmick28-Nov-07 6:44

Mike Dimmick

28-Nov-07 6:44

The crash has probably happened in native code inside a GUI component that you're using. For any more information you'll have to use the native code debugger, then you might get more information.

DoEvents: Generating unexpected recursion since 1991

How to use NTGraph3D in c#?

Seraph_summer28-Nov-07 2:33