使用 MemoryStream 將 PDF 點陣化為圖像

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如何使用MemoryStream將PDF頁面轉換為圖像,而不觸碰檔案系統

IronPDF支持從MemoryStream加載PDF文件。 ( 操作說明 API 參考資料

使用PdfDocument.ToBitMap()方法將 PDF 頁面匯出為圖像。 這將返回一個IronSoftware.Drawing.AnyBitmap物件的陣列,可用於進一步處理。

using IronPdf;

// Example rendering PDF documents to Images or Thumbnails
using var pdf = PdfDocument.FromFile("Example.pdf");

// or make one using Chrome Renderer
IronSoftware.Drawing.AnyBitmap[] pageImages = pdf.ToBitmap();

foreach (var bitmap in pageImages)
{
    using (MemoryStream memoryStream = new MemoryStream())
    {
        // save to PNG
        bitmap.ExportStream(memoryStream, IronSoftware.Drawing.AnyBitmap.ImageFormat.Png);

        // use memoryStream
    }
    bitmap.Dispose();
}
using IronPdf;

// Example rendering PDF documents to Images or Thumbnails
using var pdf = PdfDocument.FromFile("Example.pdf");

// or make one using Chrome Renderer
IronSoftware.Drawing.AnyBitmap[] pageImages = pdf.ToBitmap();

foreach (var bitmap in pageImages)
{
    using (MemoryStream memoryStream = new MemoryStream())
    {
        // save to PNG
        bitmap.ExportStream(memoryStream, IronSoftware.Drawing.AnyBitmap.ImageFormat.Png);

        // use memoryStream
    }
    bitmap.Dispose();
}
Imports IronPdf

' Example rendering PDF documents to Images or Thumbnails
Private pdf = PdfDocument.FromFile("Example.pdf")

' or make one using Chrome Renderer
Private pageImages() As IronSoftware.Drawing.AnyBitmap = pdf.ToBitmap()

For Each bitmap In pageImages
	Using memoryStream As New MemoryStream()
		' save to PNG
		bitmap.ExportStream(memoryStream, IronSoftware.Drawing.AnyBitmap.ImageFormat.Png)

		' use memoryStream
	End Using
	bitmap.Dispose()
Next bitmap
$vbLabelText   $csharpLabel

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