dependent drop down list
Question
I want to make two drop down lists. The first list has static data( folder structure), so I can use an array for it. Depending on the folder or option selected in the first list, the second list shows the sub-folders in it. but the sub-folders keeps on changing, so I have to use asp fso for it. I am using the following fso code:
<html>
<body>
<%@ Language=VBScript ENABLESESSIONSTATE = False%>
<form Name="sushant" method="post" action="sushant.asp">
<select id="selFiles" name="selFiles" class="Select" style="width: 250px" tabindex="130">
<%
Dim fso, folder, files
Set fso=Server.CreateObject("Scripting.FileSystemObject")
Set folder=fso.GetFolder("D:\")
Set files=folder.SubFolders
For each folderIdx In files
Response.Write("<option>" + folderIdx.Name + "</option>")
Next
%>
</select>
</form>
</body>
</html>
I don't know how to make such a dependent list. Any help is really appreciated.
1 answers
solution1
1 ACCPTED 2010-05-04 15:25:15
You'll have to involve JavaScript. What you need to have happen is the static dropdown trigger some event whenever it changes, in order to update your dynamic dropdown. So you can:
- Have the JavaScript post the form whenever the static dropdown changes. When this post occurs, you can pull the folders for the dynamic dropdown.
- Have the JavaScript trigger an Ajax event whenever the static dropdown changes. I would recommend jQuery for this.
Since the folders change often, those are the only two options I'd recommend. If you need help with a specific implementation, there are lots of resources available (this is a very common feature that people use jQuery/Ajax for), and it should work with any server-side language (classic ASP or otherwise).
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