dropdown data loading & event firing

Question

0.00/5 (No votes)

See more:

Dear,

I am facing problem as follows describes bellow,
I have two drop-down control in asp.net page.
2nd one load based on first drop-down,when first one have only one data it is not fired & 2nd one not loaded.
I have tried first one fixed a item "--select--". now it's work but need appenddatabounditem true.
This cause problem,like when first drop-down 2 data,if i select first data,data loaded in 2nd drop-down,then 2nd data in first drop-down select then it will not clear previous data.i have tried items.clear this one but result is same.

Please can u help anyone to find out a way.

N:B: if needed more clarification in problem please comments.

Thanks in Advance
Mahmud

Posted 14-Apr-13 18:14pm

Mahmudunnabi

Add a Solution

Comments

PrashantSonewane 15-Apr-13 0:30am

instead of appenddatabounditem have you tried inserting "-Select-" like below:

DropDownList1.Items.Insert(0, "-Select-");

Mahmudunnabi 15-Apr-13 0:40am

Dear,
is there any option to do it in aspx page.
Thanks

PrashantSonewane 15-Apr-13 0:31am

can you add code how are you doing it now?

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

_Amy · Answer 1 · 2013-04-14T18:25:00

Try clearing the items and rebind it again.
In the SelectedIndexChanged event of first DropDownList clear the items of DropDownList2 and rebind that. Try this:

C#

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    if(DropDownList2.Item.Count > 0)
        DropDownList2.Items.Clear(); 
    //Now bind the data again to DropDownList2
}

Hope it helps!
--Amit

Abhinav S · Answer 2 · 2013-04-14T18:26:00

Solution 2

Try
http://csharpdotnetfreak.blogspot.in/2009/03/populate-dropdown-based-selection-other.html[^]
https://www.obout.com/Interface/aspnet_integration_cascading.aspx[^]
http://www.aspdotnet-suresh.com/2011/01/introduction-here-i-will-explain-how-to.html[^]

Posted 14-Apr-13 18:26pm

Abhinav S