Refreshing data in dropdownlist

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I have 2 dropdownlist .that second dropdown list receives value from first one to show data,but I have a problem that after fist selection from first dropdown seconde dropdown data can not refresh to gives new data from first drop down list,I used auto post back in first dropdown list but I dont know what can I write in selecting changes?

Posted 29-Nov-11 3:15am

kitykity

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Ravi Sant 29-Nov-11 9:26am

are you binding second dropdown on selectedIndexChange event of first dropdown? if so, that shall work..

3 solutions

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RaviRanjanKr · Answer 1 · 2011-11-29T03:31:00

Solution 1

You need to call DataBind() function while saving,updating or deleting data.
like
DropDownList.DataBind();
To get more reference Have a look there
MSDN-[DropDownList Class][^]
MSDN-[BaseDataBoundControl.DataBind Method][^]

Posted 29-Nov-11 3:31am

RaviRanjanKr

Comments

kitykity 30-Nov-11 3:04am

I write DropDownList.DataBind();
in first dropdownlist selecting change but it doesn't work

TNJS82 · Answer 2 · 2011-11-29T03:41:00

Solution 3

Well I am Not Sure.....about ur thing....
but this will work.....
try this one on Page load
<pre lang="c#">
protected void Page_Load(object sender, EventArgs e)
{
string s = DropDownList1.SelectedItem.ToString();

DropDownList2.Items.Add(s);

}
</pre>

Posted 29-Nov-11 3:41am

TNJS82

**Manoj K Bhoir** · Answer 3 · 2011-11-29T03:31:00

Solution 2

Try to clear the old items of DropDownList before adding new Items in it.

C#

DropDownList1.Items.Clear();

Posted 29-Nov-11 3:31am

Manoj K Bhoir

Comments

kitykity 30-Nov-11 3:03am

I used both DropDownList1.Items.Clear(); and DropDownList1.DataBinde(); but it desn't work