|
First, thanks for your feedback.
I realize I've been a bit too vague in my initial post; however your suggestions reflect what I initially suspected.
Let me clarify a bit. I'm currently working on a 3D game and I've created a texture loader using the producer / consumer queue pattern. Depending on the view distance and the player position, I load and unload landscape textures from hard disk. I assumed (wrongly) that loading textures from another thread would be non-blocking for the main thread; this was not the case, since upon testing I was experiencing hiccups.
In another forum I read that perhaps an asynchronous loading would generally perform better (i.e. no hiccups). Seeing as I'm bound to load many textures per loader usage, I was curious to know about the performance of FileStream objects. I know they have to be correctly disposed; I'm not sure how the loader would behave when there are many concurrent asynchronous locks - if there's such a thing.
I know some testing would pretty much answer, but I thought that having some feedback, some first-hand experience on the matter would save me some time (which is never enough!).
Thanks again for any further advice,
Rob
PS: For any of you interested, some game screenshots can be found in the Gallery section of www.darkmana.com[^]
|
|
|
|
|
we'll be making an appointment schedulling for doctors.. it should display a table:
columns - doctor's name
rows - time slots
everytime we'll enter a new appointment, it will be displayed in the table.. can somebody help us??
|
|
|
|
|
sorry, whats the exact problem?
Tiefe Brunnen muss man graben wenn man klares Wasser will,
tiefe Wasser sind nicht still.
|
|
|
|
|
how can we make that appointment table?
|
|
|
|
|
hi mjee,
I think you want to store doctor Name and Appointment time in each row.If am i right,then make a table(in databsse) which contains the column DoctorName(Text Type) and AppointmentTime(Date time Type)
hope this helps
Rupesh Kumar Swami
Software Engineer,
Integrated Solution,
Bikaner (India)
My Company
|
|
|
|
|
do you want to show it like a matrix?
| Dr. 1 | Dr. 2 | Dr. 3 |
...
09:00 | Mr. 1 | ---- | ----- |
09:30 | ----- | Mr. 2 | ----- |
...
Der Staat mit der niedrigsten Geburtenrate ist nicht die Bundesrepublik, sondern der Vatikan.
|
|
|
|
|
You can make a class the inherits from DataTable:
and make an initializing method where you put som ething like
TableName = <tablename>, add columns and dump to xml.
you can load it next time, and put it as GridView datasource.
|
|
|
|
|
Can I suggest you start out by having a good think about your database. It is the core of any application like this and unless you get this bit right early on you will struggle to enhance the system.
To get you started I would initially approach this with 3 tables.
Doctor
======
DoctorId - INT - NOT NULL - IDENTITY - PRIMARY KEY
DoctorName - NVARCHAR(200) - NOT NULL
(You can add other columns here later as needed)
Surgery
=======
SurgeryId - INT - NOT NULL - IDENTITY - PRIMARY KEY
SurgeryName - NVARCHAR(200) - NOT NULL
(Other columns here too eg/ opening times)
Appointment
===========
AppointmentId - INT - NOT NULL - IDENTITY - PRIMARY KEY
DoctorId - INT - FOREIGN KEY (Doctor)
SurgeryId - INT - FOREIGN KEY (Surgery)
AppointmentDateTime - DATETIME
(Other columns here if necessary)
That should get you started on the Db structure, and easily allows you to pull out all records for a particular doctor, or surgery, to display in a grid.
|
|
|
|
|
hi
I m developing a desktop application in streaming media using C#.
I m doing different opertions in it using multithreading like User Login, searching information from Database, searching and playing video file etc.
I m also capturing Live video from Webcam and displaying it on the window of my application. But the problem is that when I put the code of Live video capturing and preveiwing in Thread,it doesn't work i.e it doest not caputer n display the live video.
so tell me that is multithreading not possible in streaming media or there is some techniques of multithreading for it?
Plz reply me ASAP
Regards
B!z
|
|
|
|
|
its possible, but you have to ensure threadsafety, say, by using a circular buffer or similiar.
Hope this helps, Good luck
|
|
|
|
|
I'm coding a program like this in .Net 3.0. When you load a XML data. Its elements, texts, attributes will be populated on the Tree View and its full content in Text Box. I used XDocument(System.Xml.Linq) to make it faster. But now When I select a node from the Tree View, I want to highlight the line of XML code in the Text Box which contain that node. Any solution for this ? Help me, pls. Thank you.
modified on Friday, May 16, 2008 2:01 AM
|
|
|
|
|
Personally I would make a class that inherits from TreeNode and store the corresponding XML Code in it. When you select this TreeNode you can search in the Textbox for that string an highlight it.
Hope this helps
Tiefe Brunnen muss man graben wenn man klares Wasser will,
tiefe Wasser sind nicht still.
|
|
|
|
|
Thanks for your help. I thought about it and I found one problem. If two element has the exact name, attribute and text. How can I distinguish between them. I don't know how to store and retrieve their full path. Can you make an example for me 
|
|
|
|
|
If two elements have the same name, you can distinguish it by the order of the elements. Have these elements the same parent?
I could only give you an example with the standard XmlDocument object. With linq i didn't handle that problem yet.
Tryout the XmlNotepad from MS, may this gives you an idea, how you can handle the Xml.
Der Staat mit der niedrigsten Geburtenrate ist nicht die Bundesrepublik, sondern der Vatikan.
|
|
|
|
|
Thank you, I will give it a shot
|
|
|
|
|
Hi Guys. Is there any other function or method I can use to return a 16 digit number? I have very large numbers that I am trying to calculate and the problem is that I am usi8ng LONG and Int64 at the moment and I only get a 13 digit value returned instead of the full 16 digits.
Does anybody have any ideas or advice?
Excellence is doing ordinary things extraordinarily well.
|
|
|
|
|
I don't think anything is built in, but the libraries do exist, I am sure
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
|
|
|
|
|
Thanks mate. I have read a few articles but can't make head or heels from them. Have been looking ata few on Codeproject like this one http://www.codeproject.com/KB/cs/biginteger.aspx[^] but they don't seem to be much help though. Have googled around and can't find anything. Old languages like Oracle and Cobol can handle this, why not C#?
Excellence is doing ordinary things extraordinarily well.
|
|
|
|
|
Perhaps people had more money back then ? :P
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
|
|
|
|
|
Heck, Java has a BigInteger type built in. Came in handy when I was doing some RSA stuff for my internship.
Cheers,
Vikram.
The hands that help are holier than the lips that pray.
|
|
|
|
|
Yeah, I'm sure they did.  Well, lets put it this way,I have a file generated on our DEC, in COBOL which then calculates a range of numbers to create a HASH total. Problem is that the file generated only caters for 12 digits in the layout and we can't get this changed as it is a regulatory file layout. I need to recalculate this hash total so I can verify it with the third party that process the file. So, I'm a bit stuck. I have tried to calculate this in Excel 2007 but Excel 2007 seems to be doing some sort of automatic rounding for some strange reason which left me with trying to develop something in C# to do this instead.
Excellence is doing ordinary things extraordinarily well.
|
|
|
|
|
A long/Int64 can handle at least 18 digits.
An alternative would be to use the Decimal data type. That will give you at least 28 digits.
Despite everything, the person most likely to be fooling you next is yourself.
modified on Friday, May 16, 2008 2:29 AM
|
|
|
|
|
Hi,
the long/int64 type in C# can hold 18-digit numbers
since 10^18 = 1000^6 =almost= 1024^6 = 2^60; or 63*0.301 = 18.9 where 0.301=log10(2)
if your code does not perform as expected, something is wrong.
You may want to publish both the relevant parts of the code, and the exact symptoms.
|
|
|
|
|
Hi Luc. I think I may have found the problem. I shold have gone back to the route of where it could have stemmed from which is at the import stage. I was importing them as Int32's. I changed that now and it seems to be working. I just need to check this to see if I get the same total as what the app is getting now.
How do I get this to run faster. It seems to take a good 2 minutes to import and calculate 3500 records. Below the full code listing.
FileHelperEngine<imphash> engine = new FileHelperEngine<imphash>();
engine.ErrorManager.ErrorMode = ErrorMode.SaveAndContinue;
imphash[] res = engine.ReadFile(filepath);
if (engine.ErrorManager.ErrorCount > 0)
engine.ErrorManager.SaveErrors("Errors.txt");
foreach (imphash hsh in res)
{
txtboxdisplay.Text += hsh.Field1 + Environment.NewLine;
}
long sum = 0;
foreach (imphash hsm in res)
{
sum += Convert.ToInt64(hsm.Field1.ToString());
}
txtboxdsptxt.Text = (sum.ToString() + Environment.NewLine);
}
Excellence is doing ordinary things extraordinarily well.
|
|
|
|
|
I found that writing the data to a text box was what was the delay and not the calculation.
Excellence is doing ordinary things extraordinarily well.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
