[Solved] RadGrid and ViewState

[Mark]

Hi,

I have a very strange problem with the ViewState when I use the RadGrid.

Example code:

        <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"
            DataSourceID="EntityDataSource1" GridLines="None">
            <MasterTableView datakeynames="ProductID" datasourceid="EntityDataSource1">
                <Columns>
                    <telerik:GridEditCommandColumn ButtonType="LinkButton">
                    </telerik:GridEditCommandColumn>
                    <telerik:GridBoundColumn DataField="Name" HeaderText="Name"
                        SortExpression="Name" UniqueName="Name">
                    </telerik:GridBoundColumn>
                </Columns>
            </MasterTableView>
        </telerik:RadGrid>

I also use a browser file with the following code.

<browsers>
    <browser refID="Default">
        <controlAdapters>
            <adapter controlType="System.Web.UI.Page" adapterType="Telerik.Web.UI.RadSessionPageStateCompression" />
        </controlAdapters>
    </browser>
</browsers>

When you view the sourcecode of the page, the ViewState is only a few bytes.
Now when I change the ButtonType in the GridEditCommandColumn to ImageButton, the ViewState increases to several kB's.
Disabling ViewState on the RadGrid won't help. Creating my own edit command colums with an image button doesn't fix it either.
Why is this?
And what can I do to keep my ViewState small?

Thanks,
Mark

[Mark]

Bump...
Does nobody have any idea why the ViewState is getting so big when you use ImageButtons?

[Radoslav]

Hi Mark,

The described behavior is expected. If you disable the compression you will find that in the first case with  GridEditCommandColumn.ButtonType set to LinkButton, the ViewState is smaller than in the second case with GridEditCommandColumn.ButtonType set to ImageButton.

Additionally we have many optimization techniques and I am sure some of them will be of great help for your project . Please check out the following forum thread which elaborate on the RadControls optimization techniques:
http://www.telerik.com/community/forums/aspnet-ajax/grid/entity-framework-and-performance.aspx

I hope his helps.

All the best,
Radoslav
the Telerik team