How to Bind-Get-Set value to dropdownlist using jquery


1. Add an option to list:

  $("<option value='0'>Select</option>").appendTo("#ddlCategory");
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2. Remove all the Options from drop down:

 $("#ddlCategory> option").remove();
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3. Get the selected item Text:

 $("#ddlCategory option:selected").text();

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4. Get the selected item Value:

  $("#ddlCategory").val();

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5. Set the item by Value:

 $("#ddlCategory").val(2);
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6. Selection change event:

 $("#ddlCategory").change(function(e) 
{
    //do your work
});

  and here goes populating a dropdown through jquery.....

 <html>
  <body>
    <form id="form1">
        <select id="ddlCategory" ></select>
    </form>
  </body>
</html>

 <script type="text/javascript" language="javascript">
var ddlCategory=  $("#ddlCategory");
$.ajax ({
         type: "POST",
         contentType: "application/json; charset=utf-8",
         url: "WebService1.asmx/GetCategoryList",
         dataType: "json",
         success: function(data)
        {
            for(i=o; i< data.d.length; i++)
             {
            ddlCategory.append($("<option></option>").val(data.d[i].CategoryID']).html(data.d[i].CategoryName));
            });
        
        }
 });  
</script>

  and here goes webservice code......

  public class WebService1 : System.Web.Services.WebService
    {
        [WebMethod]
public IEnumerable<Category> GetCategoryList()
        {
            Collection<Category> categoryyList = new Collection<Category>();

             categoryyList .Add(new Category(1, "Electronics"));
            categoryyList .Add(new Category(2, "Automobiles"));
            categoryyList .Add(new Category(2, "Books"));

             categoryyList .Add(new Category(2, "Furniture"));

             categoryyList .Add(new Category(2, "Cosmetics"));
            return categoryyList;
        }
}
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