XPS和OXPS文件因其分辨率獨立性而經(jīng)常用于打印。但是，有時我們需要將XPS轉(zhuǎn)換為PDF或?qū)XPS轉(zhuǎn)換為PDF。Aspose.Page可讓您以高保真度和快速渲染執(zhí)行這些轉(zhuǎn)換。

在本文中，將學習使用C＃以編程方式將OXPS或XPS轉(zhuǎn)換為PDF。以下是將在此博客中討論的功能列表：

• 使用C＃將XPS轉(zhuǎn)換為PDF
• 在C＃中將XPS的特定頁面轉(zhuǎn)換為PDF
• 在C＃中將XPS的所有頁面轉(zhuǎn)換為PDF
• 使用C＃將OXPS轉(zhuǎn)換為PDF
• 在C＃中將OXPS的特定頁面轉(zhuǎn)換為PDF
• 在C＃中將OXPS的所有頁面轉(zhuǎn)換為PDF

目前，.NET版Aspose.page升級到v20.4版，將XPS文件轉(zhuǎn)換為PDF時不會釋放內(nèi)存，同時修復PS->圖像的背景，感興趣的朋友可點擊下方按鈕下載最新版。

點擊下載最新版Aspose.Page for .NET

使用C＃將XPS轉(zhuǎn)換為PDF

使用Aspose.Page for .NET API，將XPS轉(zhuǎn)換為PDF很簡單。我們將學習以下方法來執(zhí)行XPS文件轉(zhuǎn)換：

在C＃中將XPS的特定頁面轉(zhuǎn)換為PDF

要將XPS文檔的選定頁面轉(zhuǎn)換為PDF，請按照以下步驟操作：

1. 初始化XPS輸入流
2. 從流中加載XPS文檔
3. 初始化PdfSaveOptions對象
4. 指定要轉(zhuǎn)換的頁碼
5. 將文檔另存為PDF文件

下面的代碼段遵循這些步驟，并顯示如何使用C＃將XPS轉(zhuǎn)換為PDF：

// Initialize PDF output stream
using (System.IO.Stream pdfStream = System.IO.File.Open(dataDir + "XPStoPDF.pdf", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write))
// Initialize XPS input stream
//using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "input.xps", System.IO.FileMode.Open))
using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "sample.xps", System.IO.FileMode.Open))
{
    // Load XPS document form the stream
    Aspose.Page.XPS.XpsDocument document = new Aspose.Page.XPS.XpsDocument(xpsStream, new Aspose.Page.XPS.XpsLoadOptions());
    // or load XPS document directly from file. No xpsStream is needed then.
    // XpsDocument document = new XpsDocument(inputFileName, new XpsLoadOptions());

    // Initialize options object with necessary parameters.
    Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions options = new Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions()
    {
        JpegQualityLevel = 100,
        ImageCompression = Aspose.Page.XPS.Presentation.Pdf.PdfImageCompression.Jpeg,
        TextCompression = Aspose.Page.XPS.Presentation.Pdf.PdfTextCompression.Flate,
        PageNumbers = new int[] {1, 3}
    };
    // Create rendering device for PDF format
    Aspose.Page.XPS.Presentation.Pdf.PdfDevice device = new Aspose.Page.XPS.Presentation.Pdf.PdfDevice(pdfStream);

    document.Save(device, options);
}

此代碼段使用包含多個頁面的XPS文檔作為輸入文件。而只有頁碼1和3會按照代碼段中的指定轉(zhuǎn)換為PDF。以下屏幕截圖顯示了渲染到PDF文檔的2頁：

在C＃中將XPS的所有頁面轉(zhuǎn)換為PDF

可以將整個XPS文件轉(zhuǎn)換為PDF。請按照以下步驟操作，XPS文件的所有頁面都將轉(zhuǎn)換為PDF文件：

1. 加載輸入的XPS文件
2. 用必要的參數(shù)初始化選項對象
3. 創(chuàng)建一個PdfDevice實例進行渲染
4. 將XPS導出為PDF文檔

下面的代碼段基于所有這些步驟，這些步驟顯示了如何使用C＃語言將XPS文件轉(zhuǎn)換為PDF：

// Initialize PDF output stream
using (System.IO.Stream pdfStream = System.IO.File.Open(dataDir + "XPStoPDF.pdf", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write))
// Initialize XPS input stream
//using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "input.xps", System.IO.FileMode.Open))
using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "sample.xps", System.IO.FileMode.Open))
{
// Load XPS document form the stream
Aspose.Page.XPS.XpsDocument document = new Aspose.Page.XPS.XpsDocument(xpsStream, new Aspose.Page.XPS.XpsLoadOptions());
// or load XPS document directly from file. No xpsStream is needed then.
// XpsDocument document = new XpsDocument(inputFileName, new XpsLoadOptions());

// Initialize options object with necessary parameters.
Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions options = new Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions()
{
    JpegQualityLevel = 100,
    ImageCompression = Aspose.Page.XPS.Presentation.Pdf.PdfImageCompression.Jpeg,
    TextCompression = Aspose.Page.XPS.Presentation.Pdf.PdfTextCompression.Flate,
};
// Create rendering device for PDF format
Aspose.Page.XPS.Presentation.Pdf.PdfDevice device = new Aspose.Page.XPS.Presentation.Pdf.PdfDevice(pdfStream);

document.Save(device, options);
}

使用C＃將OXPS轉(zhuǎn)換為PDF

OXPS格式是XPS文件格式的更新和高級形式。但是，某些舊的操作系統(tǒng)不支持此類文件。.NET API的Aspose.Page也能夠轉(zhuǎn)換OXPS文件。讓我們繼續(xù)學習以下使用場景：

在C＃中將OXPS的某些頁面轉(zhuǎn)換為PDF

OXPS文件可能包含許多頁面，并且可以通過以下步驟將任意數(shù)量的頁面轉(zhuǎn)換為PDF：

1. 加載OXPS文件
2. 聲明PdfSaveOptions對象
3. 設(shè)置您要轉(zhuǎn)換的頁碼
4. 將OXPS渲染為PDF

以下代碼段顯示了如何使用C＃將OXPS轉(zhuǎn)換為PDF。如代碼片段中所述，它將OXPS文件的第一頁轉(zhuǎn)換為PDF。

// Initialize PDF output stream
using (System.IO.Stream pdfStream = System.IO.File.Open(dataDir + "OXPStoPDF.pdf", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write))
// Initialize OXPS input stream
//using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "input.oxps", System.IO.FileMode.Open))
using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "sample.oxps", System.IO.FileMode.Open))
{
    // Load OXPS document form the stream
    Aspose.Page.XPS.XpsDocument document = new Aspose.Page.XPS.XpsDocument(xpsStream, new Aspose.Page.XPS.XpsLoadOptions());
    // or load XPS document directly from file. No xpsStream is needed then.
    // XpsDocument document = new XpsDocument(inputFileName, new XpsLoadOptions());

    // Initialize options object with necessary parameters.
    Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions options = new Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions()
    {
        JpegQualityLevel = 100,
        ImageCompression = Aspose.Page.XPS.Presentation.Pdf.PdfImageCompression.Jpeg,
        TextCompression = Aspose.Page.XPS.Presentation.Pdf.PdfTextCompression.Flate,
        PageNumbers = new int[] {1}
    };
    // Create rendering device for PDF format
    Aspose.Page.XPS.Presentation.Pdf.PdfDevice device = new Aspose.Page.XPS.Presentation.Pdf.PdfDevice(pdfStream);

    document.Save(device, options);
}

在C＃中將OXPS的所有頁面轉(zhuǎn)換為PDF

轉(zhuǎn)換OXPS的所有頁面都很簡單，并且與我們上面考慮的示例有關(guān)。讓我們按照以下步驟操作，將OXPS文件的所有頁面轉(zhuǎn)換為一個PDF文檔：

1. 初始化OXPS輸入流
2. 從流加載OXPS文件
3. 實例化PdfSaveOptions類的對象
4. 將OXPS導出為PDF文件

下面的代碼段按以下步驟一步一步進行，并使用C＃將OXPS轉(zhuǎn)換為PDF：

// Initialize PDF output stream
using (System.IO.Stream pdfStream = System.IO.File.Open(dataDir + "OXPStoPDF.pdf", System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write))
// Initialize OXPS input stream
//using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "input.oxps", System.IO.FileMode.Open))
using (System.IO.Stream xpsStream = System.IO.File.Open(dataDir + "sample.oxps", System.IO.FileMode.Open))
{
// Load OXPS document form the stream
Aspose.Page.XPS.XpsDocument document = new Aspose.Page.XPS.XpsDocument(xpsStream, new Aspose.Page.XPS.XpsLoadOptions());
// or load OXPS document directly from file. No xpsStream is needed then.
// XpsDocument document = new XpsDocument(inputFileName, new XpsLoadOptions());

// Initialize options object with necessary parameters.
Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions options = new Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions()
{
    JpegQualityLevel = 100,
    ImageCompression = Aspose.Page.XPS.Presentation.Pdf.PdfImageCompression.Jpeg,
    TextCompression = Aspose.Page.XPS.Presentation.Pdf.PdfTextCompression.Flate,
};
// Create rendering device for PDF format
Aspose.Page.XPS.Presentation.Pdf.PdfDevice device = new Aspose.Page.XPS.Presentation.Pdf.PdfDevice(pdfStream);

document.Save(device, options);
}