Threading? - C# Discussion Boards

3-Feb-09 19:18

Well, a horribly inefficient, but likewise easy method would be to use a BubbleSort, referring back to original TreeNode.

bool done = false;
int length = trvw2.Nodes.Count;

while(!done)
{
    done = true;
    for(int i = 1; i<length;>    {
        if(trvw1.Nodes.IndexOf(trvw2.Nodes[i])<trvw1.Nodes.IndexOf(trvw2.Nodes[i-1]))
        {
            done = false;
            //INSERT NODE SWAP CODE
        }
    }
}

I would include the "NODE SWAP CODE," but I'm not anywhere that I can check syntax, so yeah.

Sorry if it doesn't work or if there are small errors - I'm working entirely off of memory.

EDIT: Fixed typos.

There is no knowledge that is not power. - Mortal Kombat

Audio Input Class?

MartyExodus3-Feb-09 17:03

3-Feb-09 17:03

I'm working on a project for my Comp Sci class, so I figured I'd make a homebrew version of rock band/guitar hero, except with real instruments.

I was wondering if there is a way to capture the audio input in a stream, and then if there was a way to check the pitch of a particular point of that input stream.

Any help would be appreciated. Thanks.

There is no knowledge that is not power. - Mortal Kombat

Christian Graus3-Feb-09 17:44

Christian Graus

3-Feb-09 17:44

Rock Band and Guitar Hero do not support real instruments.

You can capture the input, but I'm not sure how hard it is to work out a pitch, especially if it's a guitar, which can have vibrato, bent strings, whammy bar, etc.

Christian Graus

Driven to the arms of OSX by Vista.

MartyExodus3-Feb-09 17:52

3-Feb-09 17:52

Even capturing the input would be a good enough start from where I'm at.

I imagine I can learn how to manipulate the captured audio on my own - something about FFTs, I was reading. Makes me wanna play FF Tactics. Big Grin | :-D

Is there any way I could convince you to post a link or snippet showing how to capture the audio?

There is no knowledge that is not power. - Mortal Kombat

Christian Graus3-Feb-09 19:21

Christian Graus

3-Feb-09 19:21

My first google hit was a code project article:

http://www.codeproject.com/KB/audio-video/cswavrec.aspx[^]

Christian Graus

Driven to the arms of OSX by Vista.

MartyExodus6-Feb-09 13:42

6-Feb-09 13:42

Thanks, this should help a lot.

You must just be a a better searcher than I.

I'll let you see the finished project, if you want. Probably won't be done (to completion) until about late April though...

There is no knowledge that is not power. - Mortal Kombat

Threading?

benjamin yap3-Feb-09 15:50

benjamin yap

3-Feb-09 15:50

Hi, i have a application which have a button UPLOAD.

When i press upload, the code behind will create the URI, ftpwebrequest etc etc to establish a connection and does the method.fileupload.

How ever, the application hangs awhile it is being connected to the ftp server. when the connection done and finish uploading, then it unhang.

So issit possible to like when i click the UPLOAD button, it will print to a textbox saying "Uploading in progress.. please wait".

I tried adding this code

tbxoutput.Text = "Uploading in progress.. please wait" BEFORE the creating of URI etc etc. but it still hung..

Do i have to create a thread and put the creating in 1 thread and output text in another?

Ennis Ray Lynch, Jr.3-Feb-09 15:58

3-Feb-09 15:58

ThreadPool.QueueUserWorkItem is the way to go to make threads. There should be async methods with the FtpWebRequest object, in fact there is:

http://msdn.microsoft.com/en-us/library/system.net.ftpwebrequest.begingetrequeststream.aspx[^]

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benjamin yap3-Feb-09 16:16

benjamin yap

3-Feb-09 16:16

in the sample in msdn.

it has FtpState state = new FtpState();

but when i try this in my application, it does not seems to have ftpstate

Ennis Ray Lynch, Jr.3-Feb-09 16:21

3-Feb-09 16:21

FtpState is a sample class created in the same document. Scroll up or down and you will find it.

benjamin yap3-Feb-09 16:26

benjamin yap

3-Feb-09 16:26

i dont see any.. i scrol and up down ddint see any sample class

Ennis Ray Lynch, Jr.3-Feb-09 16:55

3-Feb-09 16:55

Sorry, check http://msdn.microsoft.com/en-us/library/system.net.ftpwebrequest.aspx[^]

C# ID Generator...

Illegal Operation3-Feb-09 14:27

Illegal Operation

3-Feb-09 14:27

Hi,

Can someone please tell me how can I get the current ID from a table in SQL and incriment that number by 1 using a C# method?

The table looks like this:

Table: Person
Attribute: Id
Attribute: PersonId
Attribute: Person

The Id is auto generated by SQL. I would like C# to look what the current Id is and then incriment it by 1 when inserting the PersonId.

PS - If possible, can I do thisw in my C# code rather than SQL Stored Proc?

Illegal Operation

Ennis Ray Lynch, Jr.3-Feb-09 14:59

3-Feb-09 14:59

Well you would need to issue a Command to the db.

SqlCommand command ...
command.CommantText = "INSERT INTO customer (name, active) VALUES ('test', 1); SET @id=@SCOPE_IDENTITY();";

Would work

Expert Coming3-Feb-09 16:43

Expert Coming

3-Feb-09 16:43

Illegal Operation wrote:
The Id is auto generated by SQL. I would like C# to look what the current Id is and then incriment it by 1 when inserting the PersonId.

You said it does it by itself, AND you want to do it manually?

The best way to accelerate a Macintosh is at 9.8m/sec² - Marcus Dolengo

fazal201019-Sep-09 18:34

fazal2010

19-Sep-09 18:34

Please help me that i need to generate an ID(number) with country code(string) while selecting countries from Combo box,i am using only one table with values Country,Id,Name...etc: with OleDBConnection ACCESS,i need number Id's for each country separately,please help me someone as i am a novice in coding

thanks in advance

_Maxxx_3-Feb-09 18:52

_Maxxx_

3-Feb-09 18:52

Are you saying you want to stop SQL auto incrementing and instead do it yourself? Or, are you saying that you just want to find out what the ID of the previously inserted record was?

If the former, you need to be careful - as if multiple users access the db while you are doing your 'next number' calculation, t may end up trying to insert a duplicate value - much better to let SQL handle that for you.

To get the value of the last inserted identiy, use the SQL function SCOPE_IDENITY(). e.g.
Insert into Person (PersonId, Person) values (@PersonId, @Person);
Select SCOPE_IDENTITY();

then use

int newId = Convert.ToInt32(db.ExecuteScalar(dbCommand));

which will give your program back the ID just inserted.(I'm guessing here that your table has an Id column which is auto-incremented, and a PersonId column which is created somehow else.

(on re-reading this

Illegal Operation wrote:
incriment it by 1 when inserting the PersonId.

I'm not sure what you mean by 'inserting the PersonId'?

___________________________________________
.\\axxx
(That's an 'M')

raghsingh3-Feb-09 23:32

raghsingh

3-Feb-09 23:32

its simple,
just create a query (or write a stored procedure which contains)
"select max(Id)+1 from Person"
or
if u want to increment in c#
just select the max(id) from table and
increment the variable by one to generate the new id