Question

I have created 2 dropdownlists that are binded to a SQL DB and then pulling up a GridView. But, more specifically is there a way to have 3 user picked boxes and then have a Gridview show up? I would like to have a quick efficient way to do this without problems. I created the first 2 DDLs with autopostback and not working properly. any suggestions?

    <asp:Label ID='CustomerNumberLabel' runat='server' Text='Customer Number ' Width='125px'></asp:Label>     <asp:DropDownList ID='CustomerNumber' runat='server' AutoPostBack='True'          DataSourceID='ADDRDataSource' DataTextField='SACSNO'          DataValueField='SACSNO' AppendDataBoundItems='True'>         <asp:ListItem Text='Select a Customer' Value='' Selected='True' />     </asp:DropDownList><br />     <asp:SqlDataSource ID='ADDRDataSource' runat='server'          ConnectionString='<%$ ConnectionStrings:iSeriesHistoryConnectionString %>'          SelectCommand='SELECT [SACSNO] FROM [ADDR] WHERE ([SARP#1] = @column1)'>         <SelectParameters>             <asp:SessionParameter Name='column1' SessionField='userName' Type='Decimal' />         </SelectParameters>     </asp:SqlDataSource>      <asp:Label ID='ShipToNumberLabel' runat='server' Text='Ship-to Location ' Width='125px'></asp:Label>        <asp:DropDownList ID='ShipToNumber' runat='server'          DataSourceID='ADDRShipToNumberDataSource' DataTextField='SASHNM'          DataValueField='SASHNM' AutoPostBack='True'>         <asp:ListItem Text='Select Ship-To Location' Value='' Selected='True' />     </asp:DropDownList>     <asp:SqlDataSource ID='ADDRShipToNumberDataSource' runat='server'          ConnectionString='<%$ ConnectionStrings:iSeriesHistoryConnectionString %>'          SelectCommand='SELECT [SASHNM], [SASAD1], [SASAD2], [SASCTY], [SACSNO], [SASHST], [SASZIP] FROM [ADDR] WHERE ([SACSNO] = @SACSNO)'>         <SelectParameters>             <asp:ControlParameter ControlID='CustomerNumber' Name='SACSNO'                  PropertyName='SelectedValue' Type='Decimal' />         </SelectParameters>     </asp:SqlDataSource>    <br /><br />     <asp:FormView ID='FormView1' runat='server'          DataSourceID='ADDRShippingDataSource' Width='400px'>         <EditItemTemplate>             SACSNO:             <asp:TextBox ID='SACSNOTextBox' runat='server' Text='<%# Bind('SACSNO') %>' />             <br />             SASHNM:             <asp:TextBox ID='SASHNMTextBox' runat='server' Text='<%# Bind('SASHNM') %>' />             <br />             SASAD1:             <asp:TextBox ID='SASAD1TextBox' runat='server' Text='<%# Bind('SASAD1') %>' />             <br />             SASAD2:             <asp:TextBox ID='SASAD2TextBox' runat='server' Text='<%# Bind('SASAD2') %>' />             <br />             SASCTY:             <asp:TextBox ID='SASCTYTextBox' runat='server' Text='<%# Bind('SASCTY') %>' />             <br />             SASHST:             <asp:TextBox ID='SASHSTTextBox' runat='server' Text='<%# Bind('SASHST') %>' />             <br />             SASZIP:             <asp:TextBox ID='SASZIPTextBox' runat='server' Text='<%# Bind('SASZIP') %>' />             <br />             <asp:LinkButton ID='UpdateButton' runat='server' CausesValidation='True'                  CommandName='Update' Text='Update' />             &nbsp;<asp:LinkButton ID='UpdateCancelButton' runat='server'                  CausesValidation='False' CommandName='Cancel' Text='Cancel' />         </EditItemTemplate>         <InsertItemTemplate>             SACSNO:             <asp:TextBox ID='SACSNOTextBox' runat='server' Text='<%# Bind('SACSNO') %>' />             <br />             SASHNM:             <asp:TextBox ID='SASHNMTextBox' runat='server' Text='<%# Bind('SASHNM') %>' />             <br />             SASAD1:             <asp:TextBox ID='SASAD1TextBox' runat='server' Text='<%# Bind('SASAD1') %>' />             <br />             SASAD2:             <asp:TextBox ID='SASAD2TextBox' runat='server' Text='<%# Bind('SASAD2') %>' />             <br />             SASCTY:             <asp:TextBox ID='SASCTYTextBox' runat='server' Text='<%# Bind('SASCTY') %>' />             <br />             SASHST:             <asp:TextBox ID='SASHSTTextBox' runat='server' Text='<%# Bind('SASHST') %>' />             <br />             SASZIP:             <asp:TextBox ID='SASZIPTextBox' runat='server' Text='<%# Bind('SASZIP') %>' />             <br />             <asp:LinkButton ID='InsertButton' runat='server' CausesValidation='True'                  CommandName='Insert' Text='Insert' />             &nbsp;<asp:LinkButton ID='InsertCancelButton' runat='server'                  CausesValidation='False' CommandName='Cancel' Text='Cancel' />         </InsertItemTemplate>         <ItemTemplate>             Customer Detail<br />             <br />             <table class='style1' width='35px'>                 <tr>                     <td class='style2' align='center' >                         Address Line 1</td>                     <td class='style3' align='center' >                         <asp:Label ID='SASAD1Label' runat='server' Text='<%# Bind('SASAD1') %>' />                     </td>                 </tr>                 <tr>                     <td class='style2' align='center' >                         Address Line 2</td>                     <td class='style3' align='center' >                         <asp:Label ID='SASAD2Label' runat='server' Text='<%# Bind('SASAD2') %>' />                     </td>                 </tr>                 <tr>                     <td class='style2' align='center'>                         City</td>                     <td class='style3' align='center' >                         <asp:Label ID='SASCTYLabel' runat='server' Text='<%# Bind('SASCTY') %>' />                     </td>                 </tr>                 <tr>                     <td align='center' class='style2'>                         State</td>                     <td class='style3' align='center' >                         <asp:Label ID='SASHSTLabel' runat='server' Text='<%# Bind('SASHST') %>' />                     </td>                 </tr>                 <tr>                     <td align='center' class='style2'>                         Zip</td>                     <td class='style3' align='center' >                         <asp:Label ID='SASZIPLabel' runat='server' Text='<%# Bind('SASZIP') %>' />                     </td>                 </tr>             </table>             <br />         </ItemTemplate>     </asp:FormView>     <asp:SqlDataSource ID='ADDRShippingDataSource' runat='server'          ConnectionString='<%$ ConnectionStrings:iSeriesHistoryConnectionString %>'          SelectCommand='SELECT [SACSNO], [SASHNM], [SASAD1], [SASAD2], [SASCTY], [SASHST], [SASZIP] FROM [ADDR] WHERE ([SASHNM] = @SASHNM)'>         <SelectParameters>             <asp:ControlParameter ControlID='ShipToNumber' Name='SASHNM'                  PropertyName='SelectedValue' Type='String' />         </SelectParameters>     </asp:SqlDataSource> 

Answer 1

You can turn off AutoPostBack for all the DropDownLists, and add a Button called Lookup with something like the following in the Lookup Button_Click event:

ADDRShippingDataSource.SelectParameters.Clear()  If ShipToNumber.SelectedValue <> '' Then     ADDRShippingDataSource.SelectParameters.Add('SASHNM', ShipToNumber.SelectedValue) End If  If CustomerNumber.SelectedValue <> '' Then     ADDRShippingDataSource.SelectParameters.Add('SACSNO', CustomerNumber.SelectedValue) End If  ADDRShippingDataSource.DataBind() 

Your select command would need to be updated to include the additional criteria in your DataSource:

SELECT [SACSNO], [SASHNM], [SASAD1], [SASAD2], [SASCTY], [SASHST], [SASZIP] FROM [ADDR] WHERE (@SASHNM IS NULL OR [SASHNM] = @SASHNM) OR (@SACSNO IS NULL OR [SACSNO] = @SACSNO)