Here the selected text and value is getting using jquery when page load
$(document).ready(function () {
var ddlText = $("#ddlChar option:selected").text();
var ddlValue = $("#ddlChar option:selected").val();
});
refer this
http://csharpektroncmssql.blogspot.in/2012/03/jquery-how-to-select-dropdown-selected.html
http://praveenbattula.blogspot.in/2009/08/jquery-how-to-set-value-in-drop-down-as.html