I have tried to implement the sample video example on databinding with the LLBLGenProDataSource2 using a gridview and a dropdownlist.

Basically the grid just will not filter on the selected dropdownlist value, although it does retrieve the EntityCollection correctly. This is an ASP.NET VS2005 web application project.

Am I missing something obvious here? Thanks

<asp:DropDownList AutoPostBack="true" ID="ddlAccount"  runat="server" DataTextField="AccountId" DataValueField="AccountId">
            <asp:ListItem>6</asp:ListItem>
            <asp:ListItem>3178</asp:ListItem>
            <asp:ListItem>3179</asp:ListItem>
</asp:DropDownList>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"  DataKeyNames="AccountId" DataSourceID="LLBLGenProDataSource2_1">
            <Columns>
                <asp:BoundField DataField="AccountId" HeaderText="AccountId" ReadOnly="True" SortExpression="AccountId" />
                <asp:BoundField DataField="AccountCode" HeaderText="AccountCode" SortExpression="AccountCode" />
            </Columns>
</asp:GridView>
<llblgenpro:LLBLGenProDataSource2 ID="LLBLGenProDataSource2_1" runat="server" 
        AdapterTypeName="DAL.DatabaseSpecific.DataAccessAdapter, DALDBSpecific"
        DataContainerType="EntityCollection" 
        EntityFactoryTypeName="FactoryClasses.TblAccountEntityFactory, DAL">
            <SelectParameters>
                <asp:ControlParameter ControlID="ddlAccount" DefaultValue="6" Name="newparameter"
                    PropertyName="SelectedValue" />
            </SelectParameters>
</llblgenpro:LLBLGenProDataSource2>

Be sure that the parameter name has the same name as a field in the entity, typed list row or typed view row...

Thank you. That was it! The parameter name is the name of the Entity field - usually a PK filed - in your DAL entity class.

To me it wasn't obvious - it would be nice if the designer allowed a drop down of the available fields from the underlying entity for the parameter Name, in the same way the you can select the PropertyName to take the value of from on the filter control.