473,231 Members | 1,503 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,231 software developers and data experts.

DropDownList.SelectedIndexChanged not working after AutoPostBack

I have 3 related dropdowns. When the 1st is changed, the 2nd is
updated, and when the 2nd is changed, the 3rd is updated.

When i change the 1st dropdown (sites), the SelectedIndexChanged fires
and the 2nd dropdown (spaces) is updated. However, 'spaces' no longer
has a SelectedIndexChanged event. Where did it go to?

If I change 'spaces' (2nd dropdown) before it gets updated by the 1st
(sites), its SelectedIndexChanged is fired and the 3rd list (folders)
is updated. But now 'folders' does not have a SelectedIndexChanged
event! (I don't need it here, but just to show what's going on).

Seems when I rebuild the dropdown on Postback, it is not including the

Anyone any idea what I'm doing wrong?

I've included some of the code below.


private DropDownList sites;
private DropDownList spaces;
private DropDownList folders;

sites = sitesDropDown(url);
spaces = tsDropDown(url);

private DropDownList sitesDropDown(string folderURL)
DropDownList sites = new DropDownList();
sites.SelectedIndexChanged += new EventHandler(sites
sites.AutoPostBack = true;
sites.DataSource = source;
sites.DataTextField = "Name";
sites.DataValueField = "Href";

return sites;

private void sites_SelectedIndexChanged(object sender, EventArgs e)
spaces = tsDropDown(sites.SelectedValue);
Nov 15 '05 #1
1 9019
Donal wrote:
spaces = tsDropDown(sites.SelectedValue);

What's tsDropDown and why are you setting your control equal to
whatever's returned by it?

There are 10 kinds of people. Those who understand binary and those who

(Pull the pin to reply)
Nov 15 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: DotNetJunky | last post by:
I have built a control that runs an on-line help system. Depending on the category you selected via dropdownlist, it goes out and gets the child subcategories, and if there are any, adds a new...
by: Daniel | last post by:
Is there any other way can override this event, like javascript onchange added to the attribute of this dropdownlist? Thanks
by: bryanp10 | last post by:
I have a page that is almost entirely dynamically created. Textboxes and checkbox are working fine, firing events, and persistent their state. DropDownList is giving me a major headache. All...
by: rt | last post by:
hi, iam a having a datagrid, pls check the code ---- Public WithEvents bgt As System.Web.UI.WebControls.DropDownList ---
by: Tim::.. | last post by:
Hi... Can someone please tell me what I'm doing wrong here... I have a dropdownmenu populated from a database! The idea is that a user selects an option from the dropdownlist which then loads...
by: Santosh | last post by:
Dear all , i am writting following code. if(Page.IsPostBack==false) { try { BindSectionDropDownlist();
by: stretch73 | last post by:
I have a repeater control with a DropDownList in the header template. I am trying to make a database call and sort the results by the selectedIndex property of the drop down. The...
by: revbart | last post by:
Yep, that's me. I'll bet I've read a hundred articles somewhere or another, but I just can't get the thing to work. I'm working on a custom solution. One of the major UIs includes a calendar-style...
by: shashi shekhar singh | last post by:
Respected Sir, I have to create multiple dynamic dropdownlist boxes and add items dynamically in <asp:table> server control but problem occurs , i.e. except of fist dropdown list no dropdownlist...
by: VivesProcSPL | last post by:
Obviously, one of the original purposes of SQL is to make data query processing easy. The language uses many English-like terms and syntax in an effort to make it easy to learn, particularly for...
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 3 Jan 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). For other local times, please check World Time Buddy In...
by: jianzs | last post by:
Introduction Cloud-native applications are conventionally identified as those designed and nurtured on cloud infrastructure. Such applications, rooted in cloud technologies, skillfully benefit from...
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 7 Feb 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:30 (7.30PM). In this month's session, the creator of the excellent VBE...
by: fareedcanada | last post by:
Hello I am trying to split number on their count. suppose i have 121314151617 (12cnt) then number should be split like 12,13,14,15,16,17 and if 11314151617 (11cnt) then should be split like...
by: stefan129 | last post by:
Hey forum members, I'm exploring options for SSL certificates for multiple domains. Has anyone had experience with multi-domain SSL certificates? Any recommendations on reliable providers or specific...
by: egorbl4 | last post by:
Скачал я git, хотел начать настройку, а там вылезло вот это Что это? Что мне с этим делать? ...
by: Aftab Ahmad | last post by:
Hello Experts! I have written a code in MS Access for a cmd called "WhatsApp Message" to open WhatsApp using that very code but the problem is that it gives a popup message everytime I clicked on...
by: Aftab Ahmad | last post by:
So, I have written a code for a cmd called "Send WhatsApp Message" to open and send WhatsApp messaage. The code is given below. Dim IE As Object Set IE =...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.