how can i do this

[Asfz]

i have three dropdownlist,the start 2nd and 3rd is disable
when i change the 1st,then the 2nd is enable and list data from 1st selected value
the same to 3rd.
how can i do this,i use sql server.
thanks

[Asfz]

i found some sample code,but no response.
who can help me,help to complete get value?

private void WebordersSearchProvince_SelectedIndexChanged(object sender, PositionChangedEventArgs e){
    if (WebordersSearchProvince.SelectedItem != null){
        DataSet citydr = Global.GetAreaInfo(Convert.ToInt16(?????????));
        WebordersSearchCity.DataSource = citydr.Tables[0];
        WebordersSearchCity.DisplayMember = "area_name";
        WebordersSearchCity.ValueMember = "area_id";
    }
}

[Stefan]

Hi,

Thank you for writing.

The event that you have found is the right place to enter the desired logic. Attached you can find a sample application demonstrating how to achieve the desired functionality,
 
Kind regards,
Stefan
the Telerik team

[Asfz]

Thank you very much :)

[Plamen]

Hi,

Do not hesitate to write back if you have further questions on the matter.

Kind regards,
Plamen
the Telerik team