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SelectedIndexCh anged in drop down - How to get the newly selected value

10 New Member
I am using ASP.Net 2.0 and C# and new to this.

I have programmaticall y added a zip code drop down into web form inside Page_Load method as:
ZipDropDown.Ite ms.Add("11111") ;
ZipDropDown.Ite ms.Add("22222") ;

ZipDropDown is the drop down control on the web page.
I have created a protected void ZipDropDown_Sel ectedIndexChang ed(object sender, EventArgs e) method in my corresponding .cs file for the .aspx file.

protected void ZipDropDown_Sel ectedIndexChang ed(object sender, EventArgs e)
string a = this.ZipDropDow n.SelectedItem. Text;
string b = this.ZipDropDow n.SelectedItem. Value;

I have set AutoPostBack as true for ZipDropDown control so that the SelectedIndexCh anged gets triggered when the user changes zip code from the drop down.

My problem is, in the above code, variables a and b are not getting the correct value when the selection is changed from 11111 to 22222..
The page was populated with the value of the 11111 which is being displayed in the zip code. Then I selected 22222 from the drop down. The ZipDropDown_Sel ectedIndexChang ed got triggered. But the variable a and b still show the value 11111 (old value for drop down), not the newly selected value 22222.

How can I get the newly selected value of 2222 from the dropdown on the server side? How can I also ensure that that new value of 2222 stays displayed in the browser in the drop down?
Dec 15 '06 #1
2 10540
692 Recognized Expert Contributor
Check for isPostback
If Page.IsPostBack = False Then
ZipDropDown.Ite ms.Add("11111") ;
ZipDropDown.Ite ms.Add("22222") ;
End if

It should work.

Dec 18 '06 #2
759 Recognized Expert Contributor
Use the If (! IsPostBack)

Set the ValueMember property of combo to the Member u want.

Get the value using SelectedValue propeerty.

Dec 18 '06 #3

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