Drop down value set through javascript, not getting in code behind

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I am setting selected item of one drop down according to the value of other drop down through javascript.
But I am not getting this selected item value in code behind.
Finally I used Hidden Field for setting the drop down value and then used this hidden field value in code behind.

Can any one explain me this behavior?

java-script code : -

JavaScript

for (var j = 0; j < ddlDataType.options.length; j++) 
{
 if(ddlDataType.options[j].text.toLowerCase() == 
     auditTableColumnsArray[i][0].toString().toLowerCase())
 {
    ddlDataType.options[j].selected = true;
    $get("<%= hfDataType.ClientID %>").value = ddlDataType.options[j].value;
    break;
 }
}

Posted 20-Sep-12 19:35pm

itskvini

Updated 20-Sep-12 19:36pm

v2

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Krishna Kishore Biyyam · Answer 1 · 2012-09-21T02:33:00

Solution 1

Have you enabled view state of the dropdown?
if not set "EnableViewState=true" for the control.

Posted 21-Sep-12 2:33am

Krishna Kishore Biyyam

PBGuy · Answer 2 · 2012-09-21T02:47:00

Solution 2

I think u have ur fill drop down method in page load, instead of !ispostback, check it once

Posted 21-Sep-12 2:47am

PBGuy

Comments

itskvini 22-Sep-12 1:04am

Well !IsPostBack, that has been a practice for a while now. So no luck there.
Actually it could not have been an issue if the setting of drop down would have been done on code behind. But we didn't want unnecessary postback. That's why doing it using javascript.