I was using a ObjectDataSource to generate a listing including paging. The ObjectDataSource used the GetItems method of my usercontrol. See this previous post. This construction works great. But now I needed to do some custom filtering in the GetItems method based on a property of the usercontrol. At first I tried to use the property directly in the GetItems method, this didn't work the property the property returned NULL. After a small search on the internet I found the following blog post. The solution is to dynamically add a Selectparameter that will be passed to the GetItems method. You can dynamically add Selectparameters at the OnSelecting event of the asp:ObjectDataSource, like this:
And in you codebehind:
protected void odsListing\_Selecting(object sender, ObjectDataSourceSelectingEventArgs e) {
e.InputParameters\["ListingDataSourceId"\] = *YourUsercontrolProperty*;
}
Now you can use YourUsercontrolProperty in the Select method of your ObjectDataSource.
public Sitecore.Collections.ItemList getItems(string **myProperty**) {
// Your selection logica // You can use the string **myProperty** for filtering }
Hope it helps.