async void printDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
// Listen for PageContent changes
string optionId = args.OptionId as string;
if (string.IsNullOrEmpty(optionId))
return;
if (optionId == "PageContent")
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal,
() =>
{
printDocument.InvalidatePreview();
});
}
}
private void PrintDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
if (args.OptionId == null)
{
// Invalidate the preview when switching printers.
this.printDocument.InvalidatePreview();
}
}
/// <summary>
/// Option change event handler
/// </summary>
/// <param name="sender">PrintTaskOptionsDetails object</param>
/// <param name="args">the event arguments containing the changed option id</param>
async void printDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
if (args.OptionId == null)
{
return;
}
string optionId = args.OptionId.ToString();
// Handle change in Page Range Option
if (optionId == "PageRange")
{
IPrintOptionDetails pageRange = sender.Options[optionId];
string pageRangeValue = pageRange.Value.ToString();
selectionMode = false;
switch (pageRangeValue)
{
case "PrintRange":
// Add PageRangeEdit custom option to the option list
sender.DisplayedOptions.Add("PageRangeEdit");
pageRangeEditVisible = true;
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
ShowContent(null);
});
break;
case "PrintSelection":
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
Scenario4PageRange page = (Scenario4PageRange)scenarioPage;
PageToPrint pageContent = (PageToPrint)page.PrintFrame.Content;
ShowContent(pageContent.TextContentBlock.SelectedText);
});
RemovePageRangeEdit(sender);
break;
default:
await scenarioPage.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
ShowContent(null);
});
RemovePageRangeEdit(sender);
break;
}
Refresh();
}
else if (optionId == "PageRangeEdit")
{
IPrintOptionDetails pageRange = sender.Options[optionId];
// Expected range format (p1,p2...)*, (p3-p9)* ...
if (!Regex.IsMatch(pageRange.Value.ToString(), @"^\s*\d+\s*(\-\s*\d+\s*)?(\,\s*\d+\s*(\-\s*\d+\s*)?)*$"))
{
pageRange.ErrorText = "Invalid Page Range (eg: 1-3, 5)";
}
else
{
pageRange.ErrorText = string.Empty;
try
{
GetPagesInRange(pageRange.Value.ToString());
Refresh();
}
catch (InvalidPageException ipex)
{
pageRange.ErrorText = ipex.Message;
}
}
}
}
// 当打印预览页中的自定义选项的选中项发生变化时
private async void printDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
// 获取发生变化的自定义选项的 OptionId
string optionId = args.OptionId as string;
if (string.IsNullOrEmpty(optionId))
return;
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
MessageDialog messageDialog = new MessageDialog(optionId, "OptionId");
await messageDialog.ShowAsync();
// 获取打印预览页中的指定的自定义选项的选中项的 ItemId
string itemId = sender.Options[optionId].Value as string;
messageDialog = new MessageDialog(itemId, "ItemId");
await messageDialog.ShowAsync();
/*
* 此处需要根据用户的选择，来修改打印的内容，这里就不写了
*/
// 刷新预览页
printDocument.InvalidatePreview();
});
}