ActiveRecord is not scrolling to viewport

Falko posted over 16 years ago

Hi there,

I activiate and select a record in XamDataGrids InitializeRecord event. After the Grid is shown the Record is selected too. But not in Viewport. How can I realize that. Please have a look at the Sample I've attached.

-JD-

WpfApplication1.rar

4850

Offline Joseph Dour [Infragistics] posted over 16 years ago in reply to Falko
Yes, instead of setting the RecordContainerGenerationMode to Preload which will pre-hydrate all of the elements in the visual tree for all of the records you could do one of the following:

Set the RecordLoadMode to "PreloadRecord". This will cause all of the DataRecords to get allocated and initialized without hydrating their associated DataRecordPresenter elements.

Wire up the Window's Loaded event and call the xamDataGrid's GetRecordFromDataItem method. This will walk over all of the records, lazily creating and initializing tem, until it finds a match and returns the associated DataRecord. You could then select this record and scroll it into view. Note: if it doesn't find a match this will have the same effect as option 1 above.
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Falko posted over 16 years ago in reply to Joseph Dour [Infragistics]

Hi Joe,

it works fine. Thank you! But it is important to set the RecordContainerGenerationMode="PreLoad". All other Mode's don't work! Or is there any other way?

-JD-
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Offline Joseph Dour [Infragistics] posted over 16 years ago

Hi JD,

It appears to be a timing issue. You need to do this asynchronously, e.g.

delegate void RecordMethod(Record rcd);
private void ActivateRecord(Record rcd)
{
rcd.IsActive = true;rcd.IsSelected = true;
rcd.DataPresenter.BringRecordIntoView(rcd);

}
private void XamDataGrid_InitializeRecord(object sender, Infragistics.Windows.DataPresenter.Events.InitializeRecordEventArgs e)
{
DataRecord item = e.Record as DataRecord;
string modelID = ((DataModel)this.DataContext).ID;
string recordID = ((XmlElement)item.DataItem).GetElementsByTagName("ID")[0].InnerText;
// Record found - activate and select them
if (recordID == modelID)
this.Dispatcher.BeginInvoke(DispatcherPriority.Loaded, new RecordMethod(this.ActivateRecord), item);

}
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