Printing from Win RT Application (Windows 8.1 App) - printing

Question

I am developing a POS application in windows 8.1 (Universal App).
Order receipt will be printed from the application and even I am able to do so.
Printer - EPSON TM-U220D
Input - A grid is being created pragmatically with dynamic content within the ViewModel. So this grid is the input for printer
Output - In the print preview (Attahced pic 1) all looks good but when the receipt is actually printed then content is cut off from the end (Attahced pic 2)
PIC 1
PIC 2
Observations -
If I print a normal text file manually using print command (Right click file and then print), then all content is printed perfectly.
If I print that SAME content, from the application, by creating Dynamic grid, then with Small font size print is good but with bit bigger font size content again cuts off.
Tried -
Optimized the code for Creating Gird, by specifying height
Questions-
If preview is all good then why not output
Did anyone tried using ePOS-Print_SDK_141020E for Windows Store app?
Generate Dynamic Grid Code
private void AddRows(Grid grid, int count)
{
for (int i = 0; i < count; i++)
{
RowDefinition row = new RowDefinition();
row.Height = GridLength.Auto;
grid.RowDefinitions.Add(row);
}
}
private void AddColumns(Grid grid, int count)
{
for (int i = 0; i < count; i++)
{
grid.ColumnDefinitions.Add(new ColumnDefinition());
}
}
private TextBlock CreateTextBlock(string text, Color color, FontWeight fw, double fs = 10, int thick = 5)
{
if (color == null) color = Colors.Black;
TextBlock txtBlock1 = new TextBlock();
txtBlock1.Text = text;
txtBlock1.FontSize = fs;
txtBlock1.FontWeight = fw;
txtBlock1.Foreground = new SolidColorBrush(color);
txtBlock1.VerticalAlignment = VerticalAlignment.Center;
txtBlock1.Margin = new Thickness(thick);
return txtBlock1;
}
private async Task<Grid> CreateDynamicWPFGrid()
{
Grid ParentGrid = new Grid();
AddRows(ParentGrid, 8);
/* Start First Grid*/
Grid DynamicGrid = new Grid();
DynamicGrid.Width = 230;
DynamicGrid.HorizontalAlignment = HorizontalAlignment.Left;
DynamicGrid.VerticalAlignment = VerticalAlignment.Top;
DynamicGrid.Margin = new Thickness(24, 0, 0, 0);
AddColumns(DynamicGrid, 2);
AddRows(DynamicGrid, 3);
TextBlock txtBlock1 = CreateTextBlock(DateTime.Now.ToString("M/d/yy"), Colors.Black, FontWeights.Normal);
Grid.SetRow(txtBlock1, 0);
Grid.SetColumn(txtBlock1, 1);
.
.
.
.
Return ParentGrid;
}
Printer Events Code
//Register Print Contract
async Task RegisterPrintContract()
{
PrintManager manager = PrintManager.GetForCurrentView();
manager.PrintTaskRequested += OnPrintTaskRequested;
await PrintManager.ShowPrintUIAsync();
}
//Unregister Print Contract
void UnregisterPrintContract()
{
PrintManager printMan = PrintManager.GetForCurrentView();
printMan.PrintTaskRequested -= OnPrintTaskRequested;
}
void OnPrintTaskRequested(PrintManager sender, PrintTaskRequestedEventArgs args)
{
// If I need to be asynchronous, I can get a deferral. I don't *need*
// to do this here, I'm just faking it.
var deferral = args.Request.GetDeferral();
PrintTask printTask = args.Request.CreatePrintTask("My Print Job", OnPrintTaskSourceRequestedHandler);
printTask.Completed += OnPrintTaskCompleted;
deferral.Complete();
}
void OnPrintTaskCompleted(PrintTask sender, PrintTaskCompletedEventArgs args)
{
// TODO: Tidy up.
this._document = null;
this._pages = null;
}
async void OnPrintTaskSourceRequestedHandler(PrintTaskSourceRequestedArgs args)
{
var deferral = args.GetDeferral();
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
this._document = new PrintDocument();
this._document.Paginate += OnPaginate;
this._document.GetPreviewPage += OnGetPreviewPage;
this._document.AddPages += OnAddPages;
// Tell the caller about it.
args.SetSource(this._document.DocumentSource);
});
deferral.Complete();
}
void OnAddPages(object sender, AddPagesEventArgs e)
{
// Loop over all of the preview pages and add each one to add each page to be printied
// We should have all pages ready at this point...
foreach (var page in this._pages)
{
//this._pages[page.Key]
this._document.AddPage(this._pages[page.Key]);
}
PrintDocument printDoc = (PrintDocument)sender;
// Indicate that all of the print pages have been provided
printDoc.AddPagesComplete();
}
async void OnGetPreviewPage(object sender, GetPreviewPageEventArgs e)
{
Grid x = await CreateDynamicWPFGrid();
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
// NB: assuming it's ok to keep all these pages in
// memory. might not be the right thing to do
// of course.
if (this._pages == null)
{
this._pages = new Dictionary<int, UIElement>();
}
if (!this._pages.ContainsKey(e.PageNumber))
{
this._pages[e.PageNumber] = x;
}
if (this._document == null)
this._document = new PrintDocument();
this._document.SetPreviewPage(e.PageNumber, this._pages[e.PageNumber]);
}
);
}
async void OnPaginate(object sender, PaginateEventArgs e)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() =>
{
// I have one page and that's *FINAL* !
this._document.SetPreviewPageCount(e.CurrentPreviewPageNumber, PreviewPageCountType.Final);
});
}