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DropDownList on enter

Posted on 2004-07-31
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Last Modified: 2006-11-17
When I type a letter on a dropdownlist it would scroll down to the first word of the letter, how do I add the functionality to submit the form when I press enter while having focus on the dropdownlist. Basically adding an event handler that would trigger an onEnter event on a dropdownlist.


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Question by:vinny45
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4 Comments
 
LVL 9

Expert Comment

by:Joeisanerd
ID: 11686153
Just add an onkeydown javascript like this

<html>
<head>
      <script language="Javascript">
      function CheckForEnterKey()
      {
         if( event.keyCode == 13 )
         {
            document.forms[0].submit();
         }
      }      
      </script>
</head>
      <body>
            <form id="form1" action="http://www.google.com" method="post">
                  <select id="myDDL" onkeydown="CheckForEnterKey()">
                        <option value="1">Abc</option>
                        <option value="2">BAbc</option>
                        <option value="3">BBAbc</option>
                        <option value="4">Cabc</option>
                  </select>
            </form>
      </body>
</html>

keyCode is 13 for the enter key.
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LVL 17

Expert Comment

by:AerosSaga
ID: 11686209
0
 

Author Comment

by:vinny45
ID: 11686372
oh i'm sorry, I'm meant asp.net dropdownlist control, Aesros, will you're ariticle still work with web controls?
0
 
LVL 9

Accepted Solution

by:
Joeisanerd earned 500 total points
ID: 11686519
The code I posted was just to show you the Javascript, you can register the javascript functon in you asp.net code. If you put it in the page_load code you could write

string strFunction = "<script language="Javascript"> function CheckForEnterKey() {  if( event.keyCode == 13 ) ";
strFunction +=" {   document.forms[0].submit(); } }  </script>";

RegisterStartupScript("EnterKeyFunction", strFunction);

then in the html section you would and the onkeydown="CheckForEnterKey()" code or if you are doing strictly in C# code then after the RegisterStartupScript function above you could call the AddAttribute method of the control

ddl.AddAttribute("onkeydown", "CheckForEnterKey()");

that should work.
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