DataRepeater.ItemValueNeeded Event
Occurs when the VirtualMode property is set to True and a new value for a child control of a DataRepeaterItem is needed.
Namespace: Microsoft.VisualBasic.PowerPacks
Assembly: Microsoft.VisualBasic.PowerPacks.Vs (in Microsoft.VisualBasic.PowerPacks.Vs.dll)
Syntax
'Declaration
Public Event ItemValueNeeded As DataRepeaterItemValueEventHandler
public event DataRepeaterItemValueEventHandler ItemValueNeeded
public:
event DataRepeaterItemValueEventHandler^ ItemValueNeeded {
void add (DataRepeaterItemValueEventHandler^ value);
void remove (DataRepeaterItemValueEventHandler^ value);
}
member ItemValueNeeded : IEvent<DataRepeaterItemValueEventHandler,
DataRepeaterItemValueEventArgs>
JScript does not support events.
Remarks
In virtual mode, use this event to populate the child controls with values from your data store when a DataRepeaterItem is displayed or when a new item is added.
When the VirtualMode property is set to False, this event is not raised.
For more information about how to handle events, see Consuming Events.
Examples
The following example demonstrates how to handle the ItemValueNeeded event. It assumes that you have a DataRepeater control named DataRepeater1 that has its VirtualMode property set to True, and that you have a data store for a data source named Employees.
Private Sub DataRepeater1_ItemValueNeeded(
ByVal sender As Object,
ByVal e As Microsoft.VisualBasic.PowerPacks.DataRepeaterItemValueEventArgs
) Handles DataRepeater1.ItemValueNeeded
If e.ItemIndex < Employees.Count Then
Select Case e.Control.Name
Case "txtFirstName"
e.Value = Employees.Item(e.ItemIndex + 1).firstName
Case "txtLastName"
e.Value = Employees.Item(e.ItemIndex + 1).lastName
End Select
End If
End Sub
private void dataRepeater1_ItemValueNeeded(object sender, Microsoft.VisualBasic.PowerPacks.DataRepeaterItemValueEventArgs e)
{
if (e.ItemIndex < Employees.Count)
{
switch (e.Control.Name)
{
case "txtFirstName":
e.Value = Employees[e.ItemIndex + 1].firstName;
break;
case "txtLastName":
e.Value = Employees[e.ItemIndex + 1].lastName;
break;
}
}
}
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
See Also
Reference
Microsoft.VisualBasic.PowerPacks Namespace