我正在尝试使用Syncfusion PDF查看器，但要使用该方式，必须最终将xaml页另存为pdf文件。我该怎么办？
我点击了此链接，但没有得到想要的东西。 XAML to PDF Conversion
我正在尝试下面的代码从我的视图模型类中保存xaml页面[ new GenericManifestPDF（_manifestPDFDataModel）; ]，并出现以下错误：'值不在预期范围内范围” 等待renderTargetBitmap.RenderAsync（new GenericManifestPDF（_manifestPDFDataModel））;
PdfDocument document = new PdfDocument();
//Add a new page
PdfPage page = document.Pages.Add();
//Initialize render to bitmap
var logicalDpi = DisplayInformation.GetForCurrentView().LogicalDpi;
var renderTargetBitmap = new RenderTargetBitmap();
//Create a Bitmap from XAML page
await renderTargetBitmap.RenderAsync(new GenericManifestPDF(_manifestPDFDataModel));
var pixelBuffer = await renderTargetBitmap.GetPixelsAsync();
//Save the XAML in bitmap image
using (var stream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.SetPixelData(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Ignore,
(uint)renderTargetBitmap.PixelWidth,
(uint)renderTargetBitmap.PixelHeight,
logicalDpi,
logicalDpi,
pixelBuffer.ToArray());
await encoder.FlushAsync();
//Load and draw the bitmap image in PDF
PdfImage img = PdfImage.FromStream(stream.AsStream());
if (img.Width > img.Height)
document.PageSettings.Orientation = PdfPageOrientation.Portrait;
else document.PageSettings.Orientation = PdfPageOrientation.Landscape;
var section = document.Sections.Add();
section.PageSettings.Size = new SizeF(img.Width, img.Height);
page = section.Pages.Add();
page.Graphics.DrawImage(img, new RectangleF(0, 0, img.Width, img.Height));
}
//Save the document
MemoryStream docStream = new MemoryStream();
document.Save(docStream);
//Close the document
document.Close(true);
Save(docStream, "SampleManifest.pdf");
这是保存方法：
public async void Save(Stream stream, string filename)
{
stream.Position = 0;
StorageFile stFile;
if (!(Windows.Foundation.Metadata.ApiInformation.IsTypePresent("Windows.Phone.UI.Input.HardwareButtons")))
{
FileSavePicker savePicker = new FileSavePicker();
savePicker.DefaultFileExtension = ".pdf";
savePicker.SuggestedFileName = "Output";
savePicker.FileTypeChoices.Add("Adobe PDF Document", new List<string>() { ".pdf" });
stFile = await savePicker.PickSaveFileAsync();
}
else
{
StorageFolder local = Windows.Storage.ApplicationData.Current.LocalFolder;
stFile = await local.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
}
if (stFile != null)
{
Windows.Storage.Streams.IRandomAccessStream fileStream = await stFile.OpenAsync(FileAccessMode.ReadWrite);
Stream st = fileStream.AsStreamForWrite();
st.Write((stream as MemoryStream).ToArray(), 0, (int)stream.Length);
st.Flush();
st.Dispose();
fileStream.Dispose();
MessageDialog msgDialog = new MessageDialog("Do you want to view the Document?", "File created.");
UICommand yesCmd = new UICommand("Yes");
msgDialog.Commands.Add(yesCmd);
UICommand noCmd = new UICommand("No");
msgDialog.Commands.Add(noCmd);
IUICommand cmd = await msgDialog.ShowAsync();
if (cmd == yesCmd)
{
// Launch the retrieved file
bool success = await Windows.System.Launcher.LaunchFileAsync(stFile);
}
}
}
这是我在上面提到的页面构造函数中绑定数据的方式：
public GenericManifestPDF(ManifestPDFDataModel PDFDataModel)
{
this.InitializeComponent();
Function.Text = "Function :" + PDFDataModel.Function;
Counts.Text = "Count :" + PDFDataModel.Counts;
PrintedValue.Text = "Printed :" + PDFDataModel.CreationDate;
RouteValue.Text = "Route :" + PDFDataModel.Route;
BatchIDValue.Text = "Batch :" + PDFDataModel.BatchID;
BatchBarcodeText.Text = "Batch Barcode :" + PDFDataModel.Barcode;
IBarcodeWriter writer = new BarcodeWriter
{
Format = BarcodeFormat.CODE_39,
Options = new ZXing.Common.EncodingOptions
{
Height = 100,
Width = 450
}
};
var result = writer.Write(PDFDataModel.Barcode);
BarcodeImage.Source = result;
PDFItemsList.ItemsSource = PDFDataModel.ItemsPDFList;
}
这是页面的xaml代码：
<Grid x:Name="ManifestPDFGrid">
<Grid.RowDefinitions>
<RowDefinition Height="30*"/>
<RowDefinition Height="70*"/>
</Grid.RowDefinitions>
<Grid BorderBrush="Black" BorderThickness="2" Margin="30">
<Grid.RowDefinitions>
<RowDefinition Height="80*"/>
<RowDefinition Height="20*"/>
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="Manifest PDF Report" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="Function" Foreground="Black" Grid.Row="1" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="Counts" Grid.Row="2" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="1">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock x:Name="PrintedValue" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="RouteValue" Foreground="Black" Grid.Row="1" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="BatchIDValue" Grid.Row="2" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="2">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Image x:Name="BarcodeImage" Margin="20,0,0,0" HorizontalAlignment="Center"/>
<TextBlock x:Name="BatchBarcodeText" Grid.Row="1" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
</Grid>
</Grid>
<Grid Grid.Row="2">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock Text="Delivered By :" Foreground="Black" Margin="20,0,0,0" VerticalAlignment="Center"/>
<TextBlock Text="Batch Delivery Time :" Foreground="Black" Grid.Column="1" Margin="20,0,0,0" VerticalAlignment="Center"/>
</Grid>
</Grid>
<Grid Grid.Row="2">
<Grid.RowDefinitions>
<RowDefinition Height="10*"/>
<RowDefinition Height="90*"/>
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock FontWeight="Bold" Text="Carrier/PKG/BILL#" Foreground="Black" TextDecorations="Underline" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="1" Foreground="Black" TextDecorations="Underline" Text="Location/Item Type" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="2" Foreground="Black" TextDecorations="Underline" Text="Deliver To/ Sender" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="3" Foreground="Black" TextDecorations="Underline" Text="DATE/TIME/PO/Control#" Margin="20,20,0,0"/>
</Grid>
<ListView Grid.Row="1" x:Name="PDFItemsList" IsItemClickEnabled="False">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="BorderThickness" Value="0,0,0,1" />
<Setter Property="BorderBrush" Value="Black"/>
<Setter Property="Width" Value="Auto"/>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<ContentControl Style="{StaticResource EmptyContentControlStyle}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding CarrierName}" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding PackageID}" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
<TextBlock Text="{Binding Bill}" Foreground="Black" Grid.Row="2" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="1">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding Location}" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding ItemType}" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
<TextBlock Text="{Binding Quantity}" Foreground="Black" Grid.Row="2" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="2" HorizontalAlignment="Right">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding DeliverTo}" HorizontalAlignment="Right" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding Sender}" HorizontalAlignment="Right" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
<TextBlock Text="" Foreground="Black" HorizontalAlignment="Right" TextDecorations="Underline" Grid.Row="2" Margin="20,20,0,0"/>
<TextBlock Text="Signature" HorizontalAlignment="Right" Foreground="Black" FontWeight="ExtraLight" Grid.Row="3" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="3" HorizontalAlignment="Right">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="{Binding CreationDate}" HorizontalAlignment="Right" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding PONumber}" HorizontalAlignment="Right" Grid.Row="1" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding ControlNumber}" HorizontalAlignment="Right" Grid.Row="2" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="" Foreground="Black" TextDecorations="Underline" Grid.Row="3" Margin="20,20,0,0"/>
<TextBlock Text="Print Name Here" HorizontalAlignment="Right" Foreground="Black" FontWeight="ExtraLight" Grid.Row="4" Margin="20,20,0,0"/>
</Grid>
</Grid>
</ContentControl>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
</Grid>
我能够将其保存为pdf格式，但显示不正确，我认为我需要在此处进行一些更改
using (var stream = new Windows.Storage.Streams.InMemoryRandomAccessStream())
{
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.SetPixelData(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Ignore,
(uint)renderTargetBitmap.PixelWidth,
(uint)renderTargetBitmap.PixelHeight,
logicalDpi,
logicalDpi,
pixelBuffer.ToArray());
await encoder.FlushAsync();
//Load and draw the bitmap image in PDF
PdfImage img = PdfImage.FromStream(stream.AsStream());
if (img.Width > img.Height)
document.PageSettings.Orientation = PdfPageOrientation.Portrait;
else
document.PageSettings.Orientation = PdfPageOrientation.Landscape;
var section = document.Sections.Add();
section.PageSettings.Size = new SizeF(img.Width, img.Height);
PdfPage page = section.Pages.Add();
page.Graphics.DrawImage(img, new RectangleF(0, 0, img.Width, img.Height));
}
我现在面临的唯一问题是如何根据列表视图项生成pdf页面。上面给出的代码每次仅生成一页，因此该列表不会完全可见。
谢谢。
答案 0 :(得分：0)
您可以将pdf文件直接保存在Windows.Storage.ApplicationData.Current.LocalFolder中，并使用Windows.Data.Pdf Namespace API在应用中显示pdf，而不用调用Windows.System.Launcher.LaunchFileAsync(stFile)方法来启动其他应用以打开pdf文件。
有关更多详细信息，请参见UWP PDF document sample。