Horizonal Scrollbar in gridview... move slowly

[Michele]

Hello,
I've got a strange problem with the horizontal scrollbar in a gridview, consider a series of columns that bring the horizontal scrollview to appear, If I click with the mouse at the end of the scrollview I've the grid columns that move to the end but the scrollview moves really slowly to the versus of my mouse pointer.... it's as if the scrollview has a different width respect to the grid...
Here's my XAML code : (but this happens also with Fixed column,and not auto generated ones)

<IF:LayoutBase x:Class="IFWebLight.Utility.Dettagli.SenzaParametri"
      xmlns:telerikGridView="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"
    xmlns:grid="clr-namespace:Telerik.Windows.Controls.GridView;assembly=Telerik.Windows.Controls.GridView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ms="clr-namespace:System.Windows.Controls;assembly=System.Windows"
    xmlns:data="clr-namespace:Telerik.Windows.Data;assembly=Telerik.Windows.Data"
    xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls"
    xmlns:IF="clr-namespace:IFWebLight.Utility.Dettagli">
    <Grid x:Name="LayoutRoot" Loaded="LayoutRoot_Loaded">
        <Grid.RowDefinitions>
            <RowDefinition Height="25"></RowDefinition>
            <RowDefinition ></RowDefinition>
        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0" Orientation="Horizontal">
            <Button x:Name="btnCarica" Margin="5,0,0,0" Content="Carica" Click="Carica_Click"></Button>
            <Button x:Name="btnExport" Margin="5,0,0,0" Content="Export Xls" Click="btnExport_Click" IsEnabled="False" ></Button>
        </StackPanel>
        <Grid Grid.Row="1">
            <telerikGridView:RadGridView x:Name="gvContent" AutoGenerateColumns="False" DataLoadMode="Asynchronous" ColumnsWidthMode="Auto">

            </telerikGridView:RadGridView>
        </Grid>
        <telerik:RadProgressBar Grid.Row="1" x:Name="pb" Width="260" Height="30" Minimum="0" Maximum="1000" Margin="0,0,0,30" IsIndeterminate="True" Visibility="Collapsed" />
    </Grid>
</IF:LayoutBase>

Anyone is expecting this problem? (I've tried with last official Q2009 and the new born Q2010)
Thanks

[Eamon Foy]

Hi Paolo,

Did you try turning on ColumnVirtualization?

Eamon.

[Michele]

I tought it was on by default....
I'll check and let you know..
Thanks

[Eamon Foy]

Actually just looking at my code here, when I had that problem I had to set the columnvirtualization to false to rectify it. This is leading to performance issues now for me though.

[Nedyalko Nikolov]

Hi Paolo,

Please try to set height to the second grid row definition to "*". I believe this will fix the problem. In case with "auto" height RadGridView actually turns off the vertical UI virtualization which according to me causes the problem.

<Grid x:Name="LayoutRoot" Loaded="LayoutRoot_Loaded">
        <Grid.RowDefinitions>
            <RowDefinition Height="25"></RowDefinition>
            <RowDefinition Height="*"></RowDefinition>
        </Grid.RowDefinitions>

        <StackPanel Grid.Row="0" Orientation="Horizontal">
            <Button x:Name="btnCarica" Margin="5,0,0,0" Content="Carica" Click="Carica_Click"></Button>
            <Button x:Name="btnExport" Margin="5,0,0,0" Content="Export Xls" Click="btnExport_Click" IsEnabled="False" ></Button>
        </StackPanel>

Let me know if this doesn't help.

Regards,
Nedyalko Nikolov
the Telerik team

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