Image Column Performance

[Geoffrey]

I have noticed a severe performance issue when adding a GridViewImageColumn to my GridView. Scrolling gets very sluggish. I'm using

DataMemberBinding="{Binding ImageUrl}"

and the actual value is ../images/warning.ico. The same happens with other formats like png as well. Any suggestions on improving the performance?

[Pavel Pavlov]

Hello Geoffrey,

May you share a bit more details on your setup e.g. number of row, average image size , maybe some xaml .

Any info and or code/xaml would be helpful.

Meanwhile I may suggest trying to disable virtualization. This will result in longer initial load , however the heavy part of loading the images will be executed at load rather than while scrolling.

Greetings,
Pavel Pavlov
the Telerik team

[Geoffrey]

I think I found why the performance was degraded. Only certain rows will have an image and the rows that didn't have an image seems to be what influenced the performance. So I ended up making a transparent empty png file to use for those rows without an image. It was still slow, so I also changed the column to the following:

<telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn.CellTemplate>
                        <DataTemplate>
                            <Image Source="{Binding ImageUrl}" Height="15"/>
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellTemplate>
                </telerik:GridViewDataColumn>