OBOUT - Free ASP.NET Interface Controls

ASP.NET Interface Controls - Cascading Dropdown Lists

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Alfreds FutterkisteALFKI
Ana Trujillo Emparedados y heladosANATR
Antonio Moreno TaqueríaANTON
Around the HornAROUT
Berglunds snabbköpBERGS
Blauer See DelikatessenBLAUS
Blondesddsl père et filsBLONP
Bólido Comidas preparadasBOLID
Bon app'BONAP
Bottom-Dollar MarketsBOTTM
B's BeveragesBSBEV
Cactus Comidas para llevarCACTU
Centro comercial MoctezumaCENTC
Chop-suey ChineseCHOPS
Comércio MineiroCOMMI
Consolidated HoldingsCONSH
Die Wandernde KuhWANDK
Drachenblut DelikatessenDRACD
Du monde entierDUMON
Eastern ConnectionEASTC
Ernst HandelERNSH
Familia ArquibaldoFAMIA
FISSA Fabrica Inter. Salchichas S.A.FISSA
Folies gourmandesFOLIG
Folk och fä HBFOLKO
France restaurationFRANR
Franchi S.p.A.FRANS
FrankenversandFRANK
Furia Bacalhau e Frutos do MarFURIB
Galería del gastrónomoGALED
Godos Cocina TípicaGODOS
Gourmet LanchonetesGOURL
Great Lakes Food MarketGREAL
GROSELLA-RestauranteGROSR
Hanari CarnesHANAR
HILARION-AbastosHILAA
Hungry Coyote Import StoreHUNGC
Hungry Owl All-Night GrocersHUNGO
Island TradingISLAT
Königlich EssenKOENE
La corne d'abondanceLACOR
La maison d'AsieLAMAI
Laughing Bacchus Wine CellarsLAUGB
Lazy K Kountry StoreLAZYK
Lehmanns MarktstandLEHMS
Let's Stop N ShopLETSS
LILA-SupermercadoLILAS
LINO-DelicatesesLINOD
Lonesome Pine RestaurantLONEP
Magazzini Alimentari RiunitiMAGAA
Maison DeweyMAISD
Mère PaillardeMEREP
Morgenstern GesundkostMORGK
North/SouthNORTS
Océano Atlántico Ltda.OCEAN
Old World DelicatessenOLDWO
Ottilies KäseladenOTTIK
Paris spécialitésPARIS
Pericles Comidas clásicasPERIC
Piccolo und mehrPICCO
Princesa Isabel VinhosPRINI
Que DelíciaQUEDE
Queen CozinhaQUEEN
QUICK-StopQUICK
Rancho grandeRANCH
Rattlesnake Canyon GroceryRATTC
Reggiani CaseificiREGGC
Ricardo AdocicadosRICAR
Richter SupermarktRICSU
Romero y tomilloROMEY
Santé GourmetSANTG
Save-a-lot MarketsSAVEA
Seven Seas ImportsSEVES
Simons bistroSIMOB
Spécialités du mondeSPECD
Split Rail Beer & AleSPLIR
Suprêmes délicesSUPRD
The Big CheeseTHEBI
The Cracker BoxTHECR
Toms SpezialitätenTOMSP
Tortuga RestauranteTORTU
Tradição HipermercadosTRADH
Trail's Head Gourmet ProvisionersTRAIH
VaffeljernetVAFFE
Victuailles en stockVICTE
Vins et alcools ChevalierVINET
Wartian HerkkuWARTH
Wellington ImportadoraWELLI
White Clover MarketsWHITC
Wilman KalaWILMK
Wolski ZajazdWOLZA

Dropdown List control can be linked in a cascading manner. By placing these cascading dropdown lists inside
an ASP.NET AJAX UpdatePanel or an obout AJAX Page CallbackPanel, the linked drop down lists will be loaded
via AJAX (no page refresh).

ASP.NET

<asp:UpdatePanel runat="server">
    <ContentTemplate>
        <obout:OboutDropDownList ID="ddl1" DataSourceID="sds1" AutoPostBack="true" ... />
        <obout:OboutDropDownList ID="ddl2" DataSourceID="sds2" AutoPostBack="true" ... />
        <obout:OboutDropDownList ID="ddl3" DataSourceID="sds3" ... />
        
        <asp:SqlDataSource ID="sds1" ... />
        
        <asp:SqlDataSource ID="sds2" ... >
            <SelectParameters>
                <asp:ControlParameter ControlID="ddl1" PropertyName="SelectedValue" ... />
            </SelectParameters>
        </asp:SqlDataSource>
        
        <asp:SqlDataSource ID="sds3" ... >
            <SelectParameters>
                <asp:ControlParameter ControlID="ddl2" PropertyName="SelectedValue" ... />
            </SelectParameters>
        </asp:SqlDataSource>
    </ContentTemplate>
</asp:UpdatePanel>