set Postback false to GridFilterMenuItem

[Avelyn Teh]

Hi all,

Please help!
Is there any way to disable postback at GridFilterMenuItem ?
I already tried as below but it doesn't work. 
Even Postback value always show 'False' at runtime my grid still postback when I select FilterMenuItem.

  <DataBindings><telerik:RadMenuItemBinding PostBack="false"/>
</DataBindings>
</FilterMenu >

&

Dim menu As GridFilterMenu = RadGrid1.FilterMenu

For Each item As RadMenuItem In menu.Items

    Dim a As String = item.Text

    item.PostBack = False

Next

[Princy]

Hello Avelyn,

One suggestion is to ajaxifying RadGrid which will prevent all postbacks.

ASPX:

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
    <AjaxSettings>
        <telerik:AjaxSetting AjaxControlID="RadGrid1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="RadGrid1"  />
            </UpdatedControls>
        </telerik:AjaxSetting>
    </AjaxSettings>
</telerik:RadAjaxManager>
<telerik:RadGrid ID="RadGrid1"  runat="server">
    .   .   .   .   .   .  .
</telerik:RadGrid>

Thanks,
Princy.

[Avelyn Teh]

Hi Princy,

Thank you for your suggestion.
I have already used RadAjaxManager from the begining.

May be I've posted wrong question.
Here is my scenario
The grid will not populate and show result each time when user selected filterfunction from filtermenuitem after they have enter in filterbox.
User may enter more than one columns and select filterfunction for each colum.
After all, user will click command button on <CommandItemTemplate> then just show the result.
Means filtering with multiple columns at just one button click.

Recently the grid populate and show result every time when user select filtermenuitem.

Thanks

[Iana Tsolova]

Hi Avelyn,

The desired functionality is not supported by RadGrid out of the box. To implement it, you will need do it all manually. For instance, you can cancel the filter command in the OnCommand client-side event to prevent the postback. However, you will need to save in a hidden field which column are to be filtered and what are there filter functions and value. Then when you go to the server, you will need to set the CurrentFilterValue and CurrentFilterFunction for each column and build the RadGrid FilterExpression manually. For more information on how to work woth the filter expression, you can check the below articles:
http://www.telerik.com/help/aspnet-ajax/grid-operate-with-filter-expression-manually.html
http://www.telerik.com/help/aspnet-ajax/grid-applying-default-filter-on-initial-load.html

Therefore I would suggest that you use RadFilter with your RadGrid. RadFilter allows you to build  complex filter expression and then apply them on a single button click. Check out this demo to see how easy it is.

Another option is to use RadListView instead of RadGrid. Because the RadListView server API allows you to add multiple FilterExpressions at once. Find the below resources for a reference:
http://demos.telerik.com/aspnet-ajax/listview/examples/filtering/defaultcs.aspx
http://www.telerik.com/help/aspnet-ajax/listview-filterexpressions.html

I hope this helps.

All the best,
Iana
the Telerik team