Intersoft Community - WebGrid Enterprise - SetCacheControl

SetCacheControl

Glayaar — Thu, 27 May 2010 02:56:20 GMT

In my test using the latest build for WebGrid 7 and WebUI Framework 3, build 402 and build 752 respectively, I could successfully refresh the grid during flypostback.

In my scenario, I use a WebButton in order to trigger a flypostback request and during the click event handler, I will need to invoke the RenderControl function to refresh the WebGrid and during FlyPostBackRequest the initialize data source logic will be executed. Here is the snippet:

protected void WebButton1_Clicked(object sender, ISNet.WebUI.WebDesktop.WebButtonClickedEventArgs e)
{
    WebButton1.ClientAction.RenderControl(WebGrid1); 
}

SetCacheControl

bloveall — Wed, 26 May 2010 10:38:12 GMT

Actually, I was wrong. The code above does not work even if accept the default caching. Why would this be? Like I said, it works fine in normal situations - just not in "FlyPostBacks" where the grid has lost its cache.

Thanks,

Brad

SetCacheControl

bloveall — Wed, 26 May 2010 10:14:46 GMT

Hi,

I have a situation where I am trying to extend the cache from the default of five minutes to something more like 10 minutes and I'm not sure how to do this. The following code is taken from the InitializeDataSource event. This runs fine when I accept the normal WebGrid caching mechanism. It gets called after five minutes or so of inactivity and all is well. But when I try to extend it, by including the SetCacheControl() method, I get an error when this event is called during a FlyPostBack. The error is the familiar error where the grid just hangs and the circle in the lower left hand corner of the grid just goes round and round. I presume that it is related to the SetCacheControl call but am not certain. Is there a way to extend the cache timeout from five minutes to, say, ten minutes?

If Me.FieldsPopulated OrElse _
            WebGrid1.IsFlyPostBackRequest Then
            Try
                Dim dt As DataTable = Me.DoSearch()
                e.DataSource = dt

                If dt.Rows.Count = 0 Then
                    Me.DoSearch_NoResults()
                Else
                    Me.DoSearch_Results(dt.Rows.Count)
                End If

                Me.ApplyFilters()


                WebGrid1.SetCacheControl(New TimeSpan(0, 10, 0), CacheItemPriority.Normal)
                Me.DataSourceInitialized = True
            Catch ex As Exception
                Throw ex
            End Try
        End If

Thanks,

Brad