I have to pass a hide int value whenever i change the value of the dropdownlist in asp.net. How to do?

I have to fill a dropdownlist with two value as (id, value) in asp.net application. That value only fill with dropdownlist. that id should be hide. when i click the value that id has to passed as internally. how to do this?I have to pass a hide int value whenever i change the value of the dropdownlist in asp.net. How to do?
see the code:





%26lt;input type='hidden' id='hdCombo'%26gt;


%26lt;select id=someCombo onchage='saveChangedValue(this);'%26gt;


%26lt;options%26gt;......


%26lt;/select%26gt;








%26lt;script%26gt;


function SaveChangedValue(ddl)


{


document.getElementById('hdCombo').value = ddl.options[ddl.selectedIndex].value;


}


%26lt;/script%26gt;





and refer the hidden field in server-side code


e.g. in page load event as:





request.form(';hdCombo';)





if you are using server side combo box,


use in page-load:





srvCombo.attributes.add('onchange', 'saveChangedValue(this);')





here replace srvCombo to your Combo box IDI have to pass a hide int value whenever i change the value of the dropdownlist in asp.net. How to do?
If u r filling drop down lits from database u have to bind the dataset to control


1. First set properties of dropdownlist


DataTextField = ';ColumnName'; this will be visible on webpage


DataValueField=ColumnName'; this will be value which is invisible on web page


2. Bind dataset


drpdown.DataSource = dataset;


drpdown.DataBind();


3.Set AutoPostBack propertyof dropdownlist to true


and write what ever u want to werite in dropdown index changed event...


u can get id of the selected value by selectedvalue property...





If u dont understood mail me


with column names ur featching from database.


I will provide code for u...





-----------


Dropdown list has items colletion


and each item will have value and text fields


If u are filling dropdown list manually then give id in value and value in text fileds....


U can get ids by selectedvalue property of dropdownlist

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