Hi,UltraGridDocumentExporter1.Export(Me.ugvDataGrid, MyPath, DocumentExport.GridExportFileFormat.PDF) don't work when i put this line in a second thread .... why ?The thread procédure:Private Sub ThreadProcedure() Try _ugePDF.Export(_Grid, _Chemin, DocumentExport.GridExportFileFormat.PDF) Finally End Try End SubTo launch the thread: Public Sub Exporter() _ExportThread = New Thread(New ThreadStart(AddressOf ThreadProcedure)) _ExportThread.IsBackground = True _ExportThread.Start() End SubIt's working with ExcelExporter ...
Perhaps that's wrong?:
Public Sub New(ByVal uGrid As UltraGrid)
_ugePDF = New UltraGridDocumentExporter_Grid = uGrid_ugePDF.TargetPaperOrientation = Infragistics.Documents.Report.PageOrientation.Landscape_ugePDF.TargetPaperSize = Infragistics.Documents.Report.PageSizes.Letter_ugePDF.ImageCompressorType = ImageCompressorType.Flate_ugePDF.AutoSize = AutoSize.None_ugePDF.UseFileBuffer = False
End Sub
Hi,
It's really not a good idea to call Export on a seperate thread like this. You are essentially passing in a reference to the grid on the UI Thread into a new thread. If the new thread tries to refererence any properties or method of the grid you passed in, it could cause problems. This is not something that the exporters can support. If the Excel exporter works, then it's just pure luck that it does so, and I would not depend on it, nor assume that just because it appears to be working that it's working correctly.
but it's working correctly...and the export on the UI thread for more 4000 rows to pdf is very very very very too long...
Thank for your response
If it's working, then it's sheer luck. It's a dangerous thing to do and I would not be surprised if the application crashed because of it. It might not crash during the export, but it could happen later on. I would strongly advise against doing this and it's certainly not something that is supported.
You do have a couple alternatives.
1) In your separate thread you can use the DocumentEngine itself to create a PDF from scratch (w/out using the GridExporter). The DocumentExporter is simply a shortcut which leverages the DocumentEngine APIs to generate a PDF from your grid instance. It would be a bit of grunt work, but it's a possible solution to generating a PDF on a separate thread.
2) Alternatively, you can create a Grid, DataSource and Exporter all on your separate thread. Since the controls will all be part of the same thread, using the exporter is no longer a concern. There are a couple of hurdles with this approach though. You'll need to transfer any of your grid settings over (grouping, sorting, filter, etc.) since the 2nd grid is completely independant of the main UI. You may also need to force the Grid through some of its lifecycle like CreateControl.
Hope this helps,
-Tony
great !
Thank 's a lot
Here's the exact code that I used, which generated an outlook groupby rendered to PDF.
{
this.ultraCheckEditor1.DrawFilter = this;
grid.CreateControl();
grid.InitializeLayout += InitLayout;
grid.Width = 500;
grid.Height = 500;
grid.BindingContext = new BindingContext();
grid.DataBind();
}
Infragistics.Win.UltraWinGrid.UltraGrid grid = (Infragistics.Win.UltraWinGrid.UltraGrid)sender;
nop :(
You need to specify the viewstyle for the grid to be OutlookGroupBy in order for it to perform any grouping. Try the following -
_Grid.DisplayLayout.ViewStyleBand = Infragistics.Win.UltraWinGrid.ViewStyleBand.OutlookGroupBy;
Hi!
export works fine but not the group..
what's wrong ? :
_Grid = New UltraGrid _Grid.CreateControl() _Grid.BindingContext = New BindingContext() _Grid.DataSource = GridSource.DataSource _Grid.DataBind() For Each col As UltraGridColumn In GridSource.DisplayLayout.Bands(0).SortedColumns Dim bSort As Boolean = (col.SortIndicator = SortIndicator.Ascending) Dim cUltraGriCol As UltraGridColumn = _Grid.DisplayLayout.Bands(0).Columns(col.Index) _Grid.DisplayLayout.Bands(0).SortedColumns.Add(cUltraGriCol, bSort, True) Next