how to detect multiple keys pressed in asp.net textbox?

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friends,

i want to detect ctrl + a key if pressed in asp.net textbox.

i am using onkeydown event of javascript to detect keys pressed
for single key it works fine but for multiple keys it is not suitable method because it is called immediately when i press a key.

any one guide me what should i do am i using wrong function or is there server side function exists for this.

any help would be appreciated.

Posted 8-Mar-11 0:55am

mr_muskurahat

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Ryan Zahra 8-Mar-11 6:58am

What do you want to do exactly?

mr_muskurahat 8-Mar-11 7:08am

actually i have created numeric textbox in which i have restricted all alphabets and special characters and etc.... using onkeydown event now i want to allow ctrl+a to select written data in it. got my point?

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Ryan Zahra · Answer 1 · 2011-03-08T02:06:00

C#

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Control == true)
    {
          //(int) 'A' = 65  
          //(int) 'a' = 97
          if (e.KeyValue.Equals((int)'A') || e.KeyValue.Equals((int)'a'))
          {
                 textBox1.Text = "Pressed";
          }
    }
}

Wild-Programmer · Answer 2 · 2011-03-08T01:59:00

Solution 1

Please check below post

http://forums.asp.net/p/1524142/3671171.aspx[^]

Posted 8-Mar-11 1:59am

Wild-Programmer

Mouadh TRABELSI · Answer 3 · 2011-03-11T05:26:00

I've developped somthing like that, wich can help you

<HTML>
<Head>
<Script type="text/javascript">
function getPressedKeysCode(obj)
{
    //In textbox we don't capture the event for backspace and delete button who are used to delete text
   if(event.keyCode != 8 && event.keyCode != 46)
   {
        var text = "";
        var value="";
        if(event.ctrlKey || event.ctrlLeft)
            text  = "ctrl";
        if(event.shiftKey || event.shiftKey)
            text  += ((text !="")?"+":"")+"shift";
        if(event.altKey || event.altLeft)
            text  += ((text !="")?"+":"")+"alt";
        if(event.keyCode && (event.keyCode == 13/*ENTER KEY*/ || (event.keyCode >= 65 && event.keyCode <= 90) || (event.keyCode >= 112 && event.keyCode <= 123))) {

            if (event.keyCode == 13)
                text += ((text !="")?"+":"")+"Enter";
            else if (event.keyCode >= 65 && event.keyCode <= 90)
                text += ((text !="")?"+":"")+String.fromCharCode(event.keyCode);
            else
                text += ((text !="")?"+":"")+"F"+(event.keyCode-111);
        }
        obj.value =  text;
        event.returnValue= false;
        event.cancelBubble = true;
    }
}

</Script>
</Head>
<Body>
<input type="text" onkeydown="getPressedKeysCode(this)">
</Body>
</HTML>

how to detect multiple keys pressed in asp.net textbox?

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