1. IronPDF
  2. 故障排除
  3. 使用内存流光栅化为图像

使用内存流光栅化为图像

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如何使用 memorystream 将 PDF 页面转换为图像，而无需 接触文件系统？

IronPDF 提供从 MemoryStream 加载 PDF 文档的功能。 ( 操作指南 API文档)

使用 `PdfDocument.ToBitMap()方法将 PDF 页面导出为图像。这将返回一个IronSoftware.Drawing.AnyBitmap对象数组，可用于进一步处理。

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
VB   C#

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