Re: Beep() does not work - C# Discussion Boards

gehbitte14-Jul-09 22:44

14-Jul-09 22:44

I implemented some sort of Beep functionality to my Application, but I don't hear a sound:

[DllImport("kernel32.dll")]
        public static extern bool Beep(int Frequenz, int Dauer);

        
        public static void Alarm()
        {
            for (int i = 0; i < 3; i++)
            {
                Beep(500, 1000);
                Beep(1000, 1000);
            }
        }

        
        public static void Beep()
        {
            Beep(1000, 1000);           
        }

On my testform I click a Button to test this:

private void button6_Click(object sender, EventArgs e)
        {
            //Program.testwindow();
            Program.Alarm();
        }

PC Speaker is ok, it beeps at startup. I am using Vista 64bit. Any suggestions?

Re: Beep() does not work

Nagy Vilmos14-Jul-09 23:11

Nagy Vilmos

14-Jul-09 23:11

Try adding a reference to the Microsoft.VisualBasic assembly and then, as if by magic, you can call:

Microsoft.VisualBasic.Interaction.Beep();

Can you tell what it is yet?

Panic, Chaos, Destruction.
My work here is done.

Re: Beep() does not work

DaveyM6914-Jul-09 23:22

DaveyM69

14-Jul-09 23:22

No need for the VB assembly, it's already there in System.Console class.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Beep() does not work

Nagy Vilmos14-Jul-09 23:28

Nagy Vilmos

14-Jul-09 23:28

Serves me right for relying on MSDN for information Blush | :O

Panic, Chaos, Destruction.
My work here is done.

Re: Beep() does not work

Luc Pattyn15-Jul-09 0:32

Luc Pattyn

15-Jul-09 0:32

Needing VB to make C# beep a little would be completely unacceptable. Unsure | :~

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Re: Beep() does not work

DaveyM6914-Jul-09 23:21

DaveyM69

14-Jul-09 23:21

I'm not sure why it doesn't work for you - I'm sure I've used it before.

Quickie solution is to use Console.Beep

Console.Beep(440, 1000);

[Edit]I've just tried your code and it works perfectly, although I would use standard musical frequencies[^]. Person's with a sensitive musical disposition such as those with perfect or good relative pitch could find 500Hz/1KHz quite painful![/Edit]

Re: Beep() does not work

PIEBALDconsult15-Jul-09 18:20

PIEBALDconsult

15-Jul-09 18:20

DaveyM69 wrote:
quite painful!

Ehhhhxcellent...

Re: Beep() does not work

Rajesh R Subramanian14-Jul-09 23:55

Rajesh R Subramanian

14-Jul-09 23:55

gehbitte wrote:
public static void Alarm()
{
for (int i = 0; i < 3; i++)
{
Beep(500, 1000);
Beep(1000, 1000);
}
}

You are not bothering to check the return value from the API. Can you check it to verify that the function succeeds?

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Beep() does not work

Luc Pattyn15-Jul-09 0:37

Luc Pattyn

15-Jul-09 0:37

Hi,

long time ago I started using this P/Invoke code:

/// <summary>
/// MessageBeep.
/// </summary>
/// <param name="type">Beep type:
/// 0x10 = "x" = HAND, ERROR, STOP = sound "Critical Stop"
/// 0x20 = "?" = QUESTION = sound "Question"
/// 0x30 = "!" = EXCLAMATION, WARNING = sound "Exclamation"
/// 0x40 = "i" = ASTERISK, INFORMATION = sound "Asterisk"
/// </param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern bool MessageBeep(int type);

Not sure I still have to do it this way though.
BTW: Make sure through Control Panel Sounds the right sounds are installed.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Re: Beep() does not work

gehbitte15-Jul-09 23:35

gehbitte

15-Jul-09 23:35

Thanks for the help, I found out that the PC Speaker is not supported anymore by Vista 64bit Systems!

Need help.

mjawadkhatri14-Jul-09 22:21

mjawadkhatri

14-Jul-09 22:21

Hi.
this is my coding

string MyString;
MyString = "Select * from timemgmt";
if (radioin.Checked == true)
{
cn = new OdbcConnection("Driver={Microsoft ODBC for Oracle};Server=orcl;UID=it;PWD=cr;");

cmd = new OdbcCommand(MyString, cn);
cn.Open();
cmd.CommandText = "insert into timemgmt values('" + textBox1.Text + "','" + label19.Text + "','" + label18.Text + "','" + label18.Text + "')";
cmd.ExecuteNonQuery();
cn.Close();

textbox1.text = employe ID
label19.text = System Date
label18.text = System Time

i want to do Accept employee ID in one time in a day 2nd time user give same Id in a same date not accepted
plzz give me some hints

thanks in Advance

Jawad Khatri

Re: Need help. [modified]

Blue_Boy14-Jul-09 22:30

Blue_Boy

14-Jul-09 22:30

This is SQL query

if(select id from timemgmt where id=@id)=0
begin
insert values
end

but be aware from SQL Injections

mjawadkhatri wrote:
"insert into timemgmt values('" + textBox1.Text + "','" + label19.Text + "','" + label18.Text + "','" + label18.Text + "')";

and rename controls by giving more meaningfull names.

I Love T-SQL
"Don't torture yourself,let the life to do it for you."
If my post helps you kindly save my time by voting my post.

modified on Wednesday, July 15, 2009 4:40 AM

Re: Need help.

mjawadkhatri14-Jul-09 23:48

mjawadkhatri

14-Jul-09 23:48

Where i Put This Query???

Datagridview to Database table

5fingers14-Jul-09 22:10

5fingers

14-Jul-09 22:10

How can I load datagridview data to a database table
Thanks

Re: Datagridview to Database table

Vimalsoft(Pty) Ltd14-Jul-09 23:34

Vimalsoft(Pty) Ltd

14-Jul-09 23:34

Good Morning onyang2

You have to be carefull with the names.

There is a GridView and a Datagrid.

is this a Windows App or a Web App ?

Vuyiswa Maseko,

Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.somee.com
http://www.vuyiswamaseko.tiyaneProperties.co.za
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/

Re: gridview to Database table asp.net C#

5fingers14-Jul-09 23:37

5fingers

14-Jul-09 23:37

It is a web application

Re: gridview to Database table asp.net C#

Vimalsoft(Pty) Ltd14-Jul-09 23:47

Vimalsoft(Pty) Ltd

14-Jul-09 23:47

that is a gridview, you must asp such questions in the ASP.NET Forum next time.

here is a solution

http://www.dotnetfunda.com/articles/article131.aspx[^]

http://www.dotnetfunda.com/articles/article121.aspx[^]

How to get listbox items to string?

swetha_insoft14-Jul-09 21:04

swetha_insoft

14-Jul-09 21:04

listbox is having more than one value....
how to get those value to one string?

Re: How to get listbox items to string?

SeMartens14-Jul-09 21:09

SeMartens

14-Jul-09 21:09

Hi,

well you could iterate through the listbox-items and concat their text-properties. Just something like this:

StringBuilder oBuilder = new StringBuilder();
foreach(object oCurItem in myListbox.Items) {
  oBuilder.Append(oCurItem.ToString());
}
string sResult = oBuilder.ToString();

Let me know if this helps you.

Regards
Sebastian

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

Re: How to get listbox items to string?

stancrm14-Jul-09 21:11

stancrm

14-Jul-09 21:11

StringBuilder sb = new StringBuilder();
foreach (string s in listBox1.Items)
  sb.Append(s);

Re: How to get listbox items to string?

swetha_insoft14-Jul-09 21:21

swetha_insoft

14-Jul-09 21:21

string s = "";
for (int i = 0; i < lstSelected.Items.Count; i++)
{
if (s != "")
{
s = s + "," + lstSelected.Items[i].ToString();
}
else
{
s = lstSelected.Items[i].ToString();
}
}

But S-->is getting "System.Data.DataRowView" value instead of listbox item.

Re: How to get listbox items to string?

SeMartens14-Jul-09 21:26

SeMartens

14-Jul-09 21:26

Try to use

<br />
<br />
((System.Data.DataRowView) lstSelectedItems.Items[i]).Item[0].ToString()<br />
<br />

instead.

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

Re: How to get listbox items to string?

Blue_Boy14-Jul-09 21:53

Blue_Boy

14-Jul-09 21:53

StringBuilder s = new StringBuilder();

for (int i = 0; i < lstSelected.Items.Count; i++)
{
s.Append(lstSelected.Items[i].Text);
}

I Love T-SQL
"Don't torture yourself,let the life to do it for you."
If my post helps you kindly save my time by voting my post.

Re: How to get listbox items to string?

dule4327-Aug-09 15:07

dule43

27-Aug-09 15:07

foreach (DataRowView item in listBox.Items)
{
txtBox.Text += item.Row["RowNameYouWant"].ToString() + "\n";
}

random number generation

givya14-Jul-09 21:02

givya

14-Jul-09 21:02

i wanna know how to create random numbers in c#. in my application i need to provide a default password if the user forgets the password. i wanna give this default password in the form of random numbers. pls help...

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