In some scenarios the web data source control fires the PerformSelect unexpected. In other scenarios, it doest fire it when I am expecting it to.
In the current scenario, I have a web data source control with a select parameter pointed at a hidden field. the value of the hidden field is updated by another web user control. So the customer list web user control raises an event, the containing for handles the event, and delegates the event arguments to the customer demographics web user control.
The customer demographics web user control has the data source control in it that is bound to the hidden field in the customer demographics web user control. In the customer demographics web user control the PerformSelect event only gets fired once, and that is when the control is first loaded. I would suspect it to fire each time the value property of the hidden field gets set.
Does this scenario make sense?
My question is this, can you provide some information other than the section titled "Intercepting activity", because this scetion just gives us a high level of what should happen.
Here is my code behind for this scenario:
public void ShowDemographics(int customerId)
{
hfCustomerId.Value = customerId.ToString();
//LoadData(customerId);
}
protected void CustomerDemoDataSource_PerformSelect(object sender, PerformSelectEventArgs2 e)
{
int customerId;
int.TryParse(hfCustomerId.Value, out customerId);
LoadData(customerId);
}
private void LoadData(int customerId)
{
if (customerId > 0)
{
CustomerDemoDataSource.TypedView =
IndividualDemographicsTypedView.FetchCustomerDemographicByCustomerId(customerId);
}
else
{
CustomerDemoDataSource.TypedView = new IndividualCustomerTypedView();
}
}
Notice that LoadData(customerId) is commented out in the ShowDemographics method. When this line is commented out, absolutely no databinding is taking place (except for the one call when the page is loaded but, the value in the hidden field isnt set yet so no data is loaded). If I un-comment the line, my control works as designed, but the databinding control provided by LLBLGen isnt used.
Here is the html code:
<table border="0" cellpadding="0" cellspacing="0" style="width: 100%">
<tr>
<td valign="top">
Customer Demographics</td>
</tr>
<tr>
<td>
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" CellPadding="0" DataSourceID="CustomerDemoDataSource" HorizontalAlign="Left">
<Fields>
<asp:BoundField DataField="CustomerId" HeaderText="CustomerId" SortExpression="CustomerId" Visible="False" />
<asp:BoundField DataField="DateFirstPurchase" HeaderText="Date of First Purchase" SortExpression="DateFirstPurchase" />
<asp:BoundField DataField="TotalPurchaseYtd" HeaderText="TotalPurchaseYtd" SortExpression="Total Purchase Amount Ytd" />
<asp:BoundField DataField="YearlyIncome" HeaderText="Yearly Income" SortExpression="YearlyIncome" />
<asp:BoundField DataField="BirthDate" HeaderText="Birth Date" SortExpression="BirthDate" />
<asp:BoundField DataField="Gender" HeaderText="Gender" SortExpression="Gender" />
<asp:BoundField DataField="Occupation" HeaderText="Occupation" SortExpression="Occupation" />
<asp:BoundField DataField="Education" HeaderText="Education" SortExpression="Education" />
<asp:BoundField DataField="TotalChildren" HeaderText="Total Children" SortExpression="TotalChildren" />
<asp:BoundField DataField="MaritalStatus" HeaderText="Marital Status" SortExpression="MaritalStatus" />
<asp:BoundField DataField="NumberChildrenAtHome" HeaderText="Number Children At Home" SortExpression="NumberChildrenAtHome" />
<asp:CheckBoxField DataField="HomeOwnerFlag" HeaderText="Is a Home Owner?" SortExpression="HomeOwnerFlag" />
<asp:BoundField DataField="NumberCarsOwned" HeaderText="Number of Cars Owned" SortExpression="NumberCarsOwned" />
</Fields>
<FieldHeaderStyle HorizontalAlign="Left" Wrap="False" />
</asp:DetailsView>
<asp:HiddenField ID="hfCustomerId" runat="server" />
</td>
</tr>
</table>
<llblgenpro:llblgenprodatasource2 id="CustomerDemoDataSource" runat="server" adaptertypename="Fadv.Samples.BusinessLib.DatabaseSpecific.DataAccessAdapter, Fadv.Samples.BusinessLibDBSpecific" datacontainertype="TypedView" livepersistence="False" typedviewtypename="Fadv.Samples.BusinessLib.TypedViewClasses.IndividualDemographicsTypedView, Fadv.Samples.BusinessLib" OnPerformSelect="CustomerDemoDataSource_PerformSelect" EnableViewState="False"><SelectParameters>
<asp:FormParameter Type="String" FormField="hfCustomerId" Name="customerId"></asp:FormParameter>
</SelectParameters>
</llblgenpro:llblgenprodatasource2>
