DropDownList.SelectedIndex doesn't work after Databind

[Guest]

I have a dropdownlist which will jump to another page when selection change.
The onChange handler is done by JavaScript rather than setting AutoPostBack
to true. ViewState is disabled since the page do not post back to itself.

In the Page_onLoad, the DropDownList bind to datasource and databind() is
called.
After that, I want to hardcode the SelectedIndex however it doesn't work.

//code in Page_onLoad

DataView dv = dt.DefaultView;
dv.Sort = "Date DESC";
DDL.DataSource = dv;
DDL.DataTextField = "date";
DDL.DataValueField = "url";
DDL.DataBind();
DDL.SelectedIndex = 2; // <- doen't work

the DDL always select the first option

 

[Eliyahu Goldin]

This looks fine. Make sure there is nothing tampering with ddl setting after
page load either on server or client side.

Eliyahu