How to get selected dropdownlist value

Question

Hi all i am trying to develope a web application using vb.net. In my application i have populated my Dropdownlist box using javascript.But when i am trying to save the selected value in button click event it is taking as null value. i am not able to get the value for the selected item from that dropdownlist. Can anyone help me? thank you femin

sunitha · Answer

Hi try this code in aspx.cs: protected void Page_Load( object sender EventArgs e) { DropDownList1.DataTextField = ContactID ; DropDownList1.DataValueField = LastName ; TextBox1.Text=DropDownList1.SelectedValue.ToString(); DropDownList1.DataBind(); }

Femin Francis · Answer

can anybody give me that sever side routine please.....................

oupoi · Answer

If you are using AJAX to populate the dropdownlist there should be a server side routine (to get the list items or whatever). Put some codes there to populate the 'server side' dropdownlist as well.

Femin Francis · Answer

I have already populated the control using javascript with out refreshing the page.i went through your pagebut didnot get answer to my question. i want to save the selectedvalue for the selected item from that perticular control in the button click event.

Dipen Lama · Answer

See the link below http://www.c-sharpcorner.com/UploadFile/dipenlama22/Callbacks07182006093320AM/Callbacks.aspx?ArticleID=03f53b68-7671-4439-b625-50c61213cc3e

Femin Francis · Answer

Thanks for replay.But i need solution .And i am populating the dropdown using ajax with out refreshing.And i cannot do this using autopost back property. Because i dont want to refersh my page. My .net frame work is asp.net 1.1 version. So will i not be able to get that values in my application? can u please reply me..

oupoi · Answer

If you use javascript to populate the dropdownlist on client side server side will certainly have no sense about the list items (and the selected item). In this case you may use the traditional method in asp [Request.Form] to get the selected value. (Then why not simple HTML dropdown?) So if you want to get the real benefit from ASP.NET server WebControl please ensure the list items are prepared on the server side. You may enable auto-postback and then do all the logic on the server side or use AJAX (included in Altas ASP.NET 2.0) to do simliar thing without page refresh.