| | CompanyName | ContactName | |
| ALFKI |
Ana Trujillo Emparedados y helados
|
Thomas Hardy
| Edit |
| ANATR |
Around the Horn
|
Frédérique Citeaux
| Edit |
| ANTON |
Antonio Moreno Taquería
|
Antonio Moreno
| Edit |
| AROUT |
Berglunds snabbköp
|
Christina Berglund
| Edit |
| BERGS |
Blondel père et fils
|
Thomas Hardy
| Edit |
| BLAUS |
Blauer See Delikatessen
|
Hanna Moos
| Edit |
| BLONP |
Blondel père et fils
|
Frédérique Citeaux
| Edit |
| BOLID |
Bólido Comidas preparadas
|
Martín Sommer
| Edit |
| BONAP |
Bon app'
|
Laurence Lebihan
| Edit |
| BOTTM |
Bottom-Dollar Markets
|
Elizabeth Lincoln
| Edit |
| Prev Next |
Source Code & Description
You can use numerous different instances of r.a.d.combobox inside your
DataGrid.
For complex load-on-demand scenarios - for example load-on-demand combobox inside an asp:datagrid EditTemplate, you will need to use the
ExternalCallBackPage property of r.a.d.combobox. The callback ItemsRequested event fires only when then combobox is initially
visible in the page life-cycle (Page.IsPostBack == false). This is often not the case when the combobox has been added dynamically
to the page or when the combo is inside a template that it not initially visible (EditTemplate in asp:datagrid for example). This
is where ExternalCallBackPage comes to help.
ExternalCallBackPage is a normal ASP.NET aspx page that contains only one instance of r.a.d.combobox. The ID of the combobox should
match the ID of the combobox initiating the request. You can then wire the ItemsRequested event handler of the external combobox and
write your custom logic, the same way you would do in the original page. Finally, set the ExternalCallBackPage property of the original combobox
to the name of the callback (streamer) page. The path is relative to the current path of the parent page (e.g. no path needed if the streamer page is
in the same folder - just the name of the file).
One additional benefit of ExternalCallBackPages is that methods in the original page lifecycle (Page_Init, Page_Load, etc) do not get executed - the
execution is directly transferred to the external streamer page.
