Data search through multiple dropdown list

[tindatrue]

criteria
I want to make three dropdown list in my asp.net form
DDL 1 is Publisher
DDL 2 is Author
DDL 3 is Books
in first list user select publisher,second list automatically change depend
on what
publisher selected in first list,similarly third list change depend on first
and/or second list. after selection, user press search button, and extract
data from access
database and show result of selected search items from dropdown lists.

How to achieve this taks ? anyone can help ??

Thanks in advance for prompt reply

 

[Steve S]

Try the ajax toolkit and the cascading drop down example, see link below.
http://www.asp.net/AJAX/AjaxControlToolkit/Samples/CascadingDropDown/CascadingDropDown.aspx

SteveS

 

[Guest]

criteria
I want to make three dropdown list in my asp.net form
DDL 1 is Publisher
DDL 2 is Author
DDL 3 is Books
in first list user select publisher,second list automatically change depend
on what
publisher selected in first list,similarly third list change depend on first
and/or second list. after selection, user press search button, and extract
data from access
database and show result of selected search items from dropdown lists.

How to achieve this taks ? anyone can help ??

Thanks in advance for prompt reply

A regular way is to set AutoPostBack property to True
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.dropdownlist.aspx


<aspropDownList id="ColorList"
AutoPostBack="True"
OnSelectedIndexChanged="Selection_Change"
runat="server">

.......
void Selection_Change(Object sender, EventArgs e)
{

// Use ColorList.SelectedItem.Value to get the selected value
.....

DropDownList2.DataSource = ...
DropDownList2.DataBind();

}

and so on

 

[tindatrue]

Thank you Steve, very helpful articles are there
regards

 

[tindatrue]

Alexey thanks for your reply, I know about autopostback = true
but the problem is that all the list automatically posting back data
and i dont want thatm what i want is ,when user select all field
and press search button then the result will be shown

thanks

 

[Guest]

Alexey thanks for your reply, I know about autopostback = true
but the problem is that all the list automatically posting back data
and i dont want thatm what i want is ,when user select all field
and press search button then the result will be shown

thanks

ok then you have to use AJAX