PrintTaskOptionChangedEventArgs 類別

定義

public ref class PrintTaskOptionChangedEventArgs sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class PrintTaskOptionChangedEventArgs final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class PrintTaskOptionChangedEventArgs

Public NotInheritable Class PrintTaskOptionChangedEventArgs

繼承

Object Platform::Object IInspectable PrintTaskOptionChangedEventArgs

屬性

ContractVersionAttribute MarshalingBehaviorAttribute

Windows 需求

備註

以下是顯示如何在列印工作選項變更時擷取物件的程式碼片段。 首先，應用程式必須註冊以接聽選項變更。 一旦選項變更，就會對事件接聽程式進行回呼。

//  Retrieve the advanced Print Task Options.
PrintTaskOptionDetails printDetailedOptions = PrintTaskOptionDetails.GetFromPrintTaskOptions(printTask.Options);

// Create a new list option.
PrintCustomItemListOptionDetails margins = printDetailedOptions.CreateItemListOption("Margins", "Margins");
margins.AddItem("WideMargins", "Wide", "Each margin is 20% of the paper size", await wideMarginsIconTask);
margins.AddItem("ModerateMargins", "Moderate", "Each margin is 10% of the paper size", await moderateMarginsIconTask);
margins.AddItem("NarrowMargins", "Narrow", "Each margin is 5% of the paper size", await narrowMarginsIconTask);

// Add the custom option to the option list
printDetailedOptions.DisplayedOptions.Add("Margins");

printDetailedOptions.OptionChanged += printDetailedOptions_OptionChanged;

async void printDetailedOptions_OptionChanged(PrintTaskOptionDetails sender, PrintTaskOptionChangedEventArgs args)
{
    string optionId = args.OptionId as string;
    if (string.IsNullOrEmpty(optionId))
    {
        return;
    }

    if (optionId == "Margins")
    {
        PrintCustomItemListOptionDetails marginsOption = (PrintCustomItemListOptionDetails)sender.Options["Margins"];
        string marginsValue = marginsOption.Value.ToString();

        switch (marginsValue)
        {
            case "WideMargins":
                ApplicationContentMarginTop = 0.2;
                ApplicationContentMarginLeft = 0.2; 
                break;
            case "ModerateMargins":
                ApplicationContentMarginTop = 0.1;
                ApplicationContentMarginLeft = 0.1;
                break;
            case "NarrowMargins":
                ApplicationContentMarginTop = 0.05;
                ApplicationContentMarginLeft = 0.05;
                break;
        }
    }
}

若要查看此專案的完整清單，以及使用 PrintTask的其他列印案例，請參閱 列印 和 UWP 列印範例。

屬性

適用於