Question

I have an asp.net dropdown like this

 <asp:DropDownList width="95%" ID="RessourceComposantes" runat="server"    
       DataSourceID="Composantes" 
       DataTextField="Description" DataValueField="ComposanteID">
 </asp:DropDownList>

<asp:SqlDataSource ID="RessourceComposantes" runat="server" 
        ConnectionString="<%$ ConnectionStrings:OraEntities %>" 
        SelectCommand="SELECT [Blabla], [blablabla] FROM [blablablaa] 
        ORDER BY [blablablabla]">
</asp:SqlDataSource>

Is it normal that when I do dd_ressource_composante.selectedvalue on the server side I have no value. It’s always “”.

the source looks like this :

     <select name="ctl00$Tab$dd_ressource_composante" id="ctl00_Tab_dd_ressource_composante" style="width:95%;">
        <option value="1">Composante</option>
        <option value="3">DGAG</option>
        <option value="2">DSF</option>
        <option value="5">Test</option>
        <option value="6">Tous</option>

        <option value="4">VMD</option>

    </select>

I just tried to fill my dropdown in vb.net and I have the same result. The dropdown is full but when I do a postback I have no selected value

Actualy on the server side when I put a breakpoint on the dropdown, the item count is 0. I don’t understand why… It’s like the 8th dropdown list in this project and everything is the same but this one doesn’t work.

I don’t do any binding on the page load. it’s all in the aspx file

well it works ONLY when I add autopostback=”true” SelectedIndexChanged=”dd_ressource_composante_SelectedIndexChanged” for the dropdown.

And theres no code in dd_ressource_composante_SelectedIndexChanged

It’s vb.net for the server side

Thank you

Answer 1

Well that’s weird. That control was in a table and I added a row like this

tblRessourcesProjet.Rows.Insert(1, tr)

and I changed it for

tblRessourcesProjet.Rows.Add(tr)

I don’t understand quite well why it was a problem but it works now.
Thank you everyone!