Re: Recieve data - C# Discussion Boards

14-Aug-06 22:47

Hi.
using the follow code I can answer to a call, but in the while loop, I want to receive data from the calling phone, that a person is speaking.

serialPort1.BaudRate = 56000;
serialPort1.PortName = "COM3";
serialPort1.ReadTimeout = 1000000;
serialPort1.Open();
serialPort1.Write("ATA\n\r"); //Answer a call
string str;
while (true)
{
str = serialPort1.ReadExisting();
}

Best wishes

stancrm14-Aug-06 23:10

stancrm

14-Aug-06 23:10

If you want to receive "data", then use :

while(true)
{
    try
    {
        string receivedMessage = serialPort1.ReadLine();
        Console.WriteLine(receivedMessage);
    }
    catch(TimeoutException)
    {
    }
}

Put this method in a new thread.

If you want to receive the "sound" from the person, I don't know how to do that.
I think, the "sound" is analog, that's why the modem is an analog modem.
You need something to digitalized it, something like Analog-Digital-Converter.

mehrdadc4814-Aug-06 23:23

14-Aug-06 23:23

No,
now it's important for me that when the person speaking, I receive data.
no exactly sound.
in the str I receive data.
how ?

Best wishes

stancrm15-Aug-06 0:54

stancrm

15-Aug-06 0:54

A normal analog modem doesn't do that.
If the modem receive a "sound", you receive nothing
from serial port. You can only hear from the modem
speaker that your partner say something.

mehrdadc4815-Aug-06 1:21

15-Aug-06 1:21

And if he presses any key of phone device, then again I can't receive any data ?

Best wishes

Nader Elshehabi15-Aug-06 1:35

15-Aug-06 1:35

Hello

When a caller presses a button in a voice call something called DTMF tone is generated. To learn how to handle DTMF tones revise your TAPI documentation in MSDN

Regards Rose | [Rose]

Nader Elshehabi15-Aug-06 1:31

Re: Recieve data [modified]

15-Aug-06 1:31

Hello

mehrdadc48 wrote:
I want to receive data from the calling phone, that a person is speaking.

Modems actually work in several modes. Two of them are
1- Voice calls
2- Data calls

You can not transfer data in a voice call. On the other hand you can transfer voice -as a data stream- in a data call. This is called Voice Over IP.

If you are making a voice call -for example an ordinary phone is calling your phone line, and you want to record this using your computer-. In this case you should capture the audio stream from the modme speaker's audio line.

If you are developing something like a messanger that works on phone line instead of the internet. Transfer your voice as an audio stream. This way you can transfer data with it-eg. files, pictures, text, etc...-

Your loop should work if it's a data call -supposing that your modem's AT command is working-. Yet take care that this loop will go forever until you call a break;

It it's not working for some reason or another, post more details on your problem, so that we could get more oriented with it.

Regards Rose | [Rose]

mehrdadc4815-Aug-06 5:23

15-Aug-06 5:23

"you should capture the audio stream from the modme speaker's audio line"
please tell me how to do this ?
And how this?
"Transfer your voice as an audio stream"

I prefer that do this in managed code in c#

-- modified at 11:34 Tuesday 15th August, 2006

Best wishes

Nader Elshehabi15-Aug-06 11:32

Re: Recieve data [modified]

15-Aug-06 11:32

Hello

Capturing audio from a line is done in several ways. The best practice would be using DirectX. Code samples would be long, and are inappropriate to post. Just search MSDN for "audio capture".

Transfering voice as an audio stream would also depend on the way you're capturing it. If you did capture it using DirectX technology, it would be simple using the DirectX API. Once you get the stream of byte, just send it to the port of the modem -assuming that you know which port of course-

There is a DirectX namespace in .Net framework. Anything you read in C++ you can do with C#.

In a quick search, here is some links:

1- http://www.codeproject.com/cs/media/directshownet.asp[^]
2- http://www.codeproject.com/cs/media/videosav.asp[^]
3- http://www.codeproject.com/cs/media/MdxSoundEx.asp[^]
4- http://www.codeproject.com/cs/media/audiosav.asp[^]

If you still need more details, just search CP for "Audio DirectX capture". Make sure to only check C# checkbox.

Regards Rose | [Rose]

mehrdadc4815-Aug-06 22:11

15-Aug-06 22:11

My freind,
I want to capture analog sound from modem ..

"You can not transfer data in a voice call"
I want to recieve voice in voice call(not data call), in my application not on modem speaker

-- modified at 5:37 Wednesday 16th August, 2006

Best wishes

Nader Elshehabi16-Aug-06 1:31

passing a variable into a dataset select expression

16-Aug-06 1:31

Hello

I was only giving you all the possible options in using the modem.

If it's only voice you want to receive then using voice call would work fine. As I told you before you would use TAPI -ie. Telephony Application Programming Interface-.

Read TAPI documentations for details. For more specific help, you may repost.

Regards Rose | [Rose]

Glen Harvy14-Aug-06 22:35

Glen Harvy

14-Aug-06 22:35

Hi,

I have a variable called 'fromDate' which is a DateTime value and I need to pass it into the following scenario:

DataTable table = myclubDataSet.Tables["TresReports"];<br />
string expression;<br />
expression = "ReportDate = #1/01/2006#"; //<-- I need to pass the variable, not hardcoded<br />
DataRow[] foundRows;<br />
foundRows = table.Select(expression);<br />
for (int i = 0; i < foundRows.Length; i++)<br />
{<br />
 int rowis = (int) (foundRows[i][0]);<br />
 totalBF = Convert.ToDecimal(myclubDataSet.Tables["TresReports"].Rows[rowis]["BalanceOH"]);<br />
}<br />

Thanks,

Glen Harvy

Re: passing a variable into a dataset select expression

Guffa14-Aug-06 22:57

Guffa

14-Aug-06 22:57

Like this:

expression = "ReportDate = #" + fromDate.ToString("dd/MM/yyyy") + "#"

Verify the date format, though. I had to guess, as you are using a date format that doesn't follow the ISO 8601 standard. Smile | :)

---
b { font-weight: normal; }

Re: passing a variable into a dataset select expression

Glen Harvy14-Aug-06 23:45

Glen Harvy

14-Aug-06 23:45

Thanks for the response. I should have remembered this - it's getting late at night here Smile | :)

Format's OK - we're just different here in Australia Laugh | :laugh:

Glen Harvy

Problem with CallBack in MasterPage [modified]

offengenden14-Aug-06 22:15

offengenden

14-Aug-06 22:15

In my MasterPage I have this code:

private string _callbackResult = null;
protected void Page_Load(object sender, EventArgs e)
{
string cbReference = Page.ClientScript.GetCallbackEventReference(this, "arg", "Result1", "context");
string cbScript = "function UseCallback1(arg, context)" + "{" + cbReference + ";" + "}";
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "UseCallback1", cbScript, true);

}
public void RaiseCallbackEvent(string eventArg)
{
string res = AgentLogin(eventArg).ToString();
_callbackResult = res;
}
public string GetCallbackResult()
{
return _callbackResult;
}

When I open the first page - everything is ok! But when I move to the second page I can see that there is no "UseCallback1" JavaScript function in HTML!
Help me please to fix this problem!

-- modified at 4:16 Tuesday 15th August, 2006

help me please!!

Nafiseh Salmani14-Aug-06 21:47

Nafiseh Salmani

14-Aug-06 21:47

How could i set righttoleft for listbox when im using draw item event and the listbox Drawmode is set as OwnerDrawFixed.

i tried following code in drawitem event:

this.li_author_persian.RightToLeft=RightToLeft.Yes;

but it doesnt work. D'Oh! | :doh:

Christian Graus15-Aug-06 0:00

Christian Graus

15-Aug-06 0:00

OwnerDraw means your settings on the item do nothing, it's your own code that controls how it is drawn.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Nafiseh Salmani15-Aug-06 0:01

Nafiseh Salmani

15-Aug-06 0:01

Thanks, so how can i set it right to left ?!! Confused | :confused:

Christian Graus15-Aug-06 0:15

Christian Graus

15-Aug-06 0:15

If you're owner drawing, then you're drawing it yourself, aren't you ? Does DrawString have properties to support this ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Nafiseh Salmani15-Aug-06 2:57

Nafiseh Salmani

15-Aug-06 2:57

Dear Christian
Unfortunatly DrawString have not RightToLeft property?