[c#] dropdownlist from database and value send as parameter

[Piotrek \Alchemik\]

Hello,

i have small problem - i have dropdownlist, which is populated from
database by stored procedure. I had autopostback attached to this list.
I'm using this as a parameter to another stored procedure. So, when i
was using asp:SqlDataSour ce and bind to him values from this
dropdownlist everything was ok. But when i'm doing this in code behind
using SqlCommand and trying to get value from this dropdownlist

sensor = Int32.Parse(Dro pDownList1.nSel ectedValue) ;

I got error. I can't find anything usefull for this kind of behaviour.
I hope somebody can help me

Piotrek

[Mark Rae]

"Piotrek "Alchemik"" <al**@epf.pl.sp am.wonwrote in message
news:ej******** **@matrix2.nntp .idg.pl...

I got error. I can't find anything usefull for this kind of behaviour.
I hope somebody can help me

Nobody can help you if you don't say what the error is...

[Piotrek \Alchemik\]

Mark Rae wrote:

"Piotrek "Alchemik"" <al**@epf.pl.sp am.wonwrote in message
news:ej******** **@matrix2.nntp .idg.pl...

>I got error. I can't find anything usefull for this kind of behaviour.
I hope somebody can help me

Nobody can help you if you don't say what the error is...

The error is:
Input string was not in a correct format.

So i suppose i'm not getting int from dropdown list:

<asp:DropDownLi st ID="stateDropDo wnList" runat="server"
AutoPostBack="T rue" DataTextField=" ID_sensor"
DataValueField= "ID_sensor" visible = "False"
DataSourceID="S ensorFromTestow a">
</asp:DropDownLis t>
<asp:SqlDataSou rce ID="SensorFromT estowa" runat="server"
ConnectionStrin g="<%$ ConnectionStrin gs:testowaConne ctionString %>"
SelectCommand=" SelectSensor"
SelectCommandTy pe="StoredProce dure"></asp:SqlDataSour ce>

For sure this one works fine if i pass parameter to SqlDataSource, but
trying to parse them in code behind i got this error.

Hope this one helps

Piotrek