Big ItemCount problem in Unbound Mode

[Ahmad]

Hi,
I Use a RadDataPager in Unbound Mode.
when I want to set ItemCount to a big number (for example 450000000),
it takes almost 20 second.
is any way to improve time?
Thanks.

[Ahmad]

Editing Post:

I set PageSize to 1000.

the xaml code is:

  <StackPanel>
            <telerik:RadDataPager 

                                 x:Name="pager"
                                  PageSize="1000"
                                  DisplayMode="All"
                                  IsTotalItemCountFixed="True" 
                                  ></telerik:RadDataPager>

            <Button Click="BTN_Click"></Button>
        </StackPanel>

 

And the code behinde is :

private void BTN_Click(object sender, RoutedEventArgs e)
        {
            this.pager.ItemCount = 450000000;
        }

 

Thanks.