如何在 .NET 中种植、旋转和重新编辑 PDF 文件

using Aspose.Pdf.Plugins;

string input = @"C:\Docs\source.pdf";
string output = @"C:\Docs\cropped.pdf";

var optimizer = new Optimizer();
var cropOptions = new CropOptions()
{
    // Crop rectangle (left, top, width, height) in user units
    CropBox = new Rectangle(50, 50, 500, 700),
    Pages = new[] { 1, 2 } // Crop only pages 1 and 2
};
cropOptions.AddInput(new FileDataSource(input));
cropOptions.AddOutput(new FileDataSource(output));

optimizer.Process(cropOptions);

var rotateOptions = new RotateOptions()
{
    Rotation = Rotation.on90, // or .on180, .on270
    Pages = new[] { 2, 4, 6 } // Rotate only even pages
};
rotateOptions.AddInput(new FileDataSource(input));
rotateOptions.AddOutput(new FileDataSource(@"C:\Docs\rotated.pdf"));

optimizer.Process(rotateOptions);

var resizeOptions = new ResizeOptions()
{
    PageSize = PageSize.PageA4,
    Pages = new[] { 1, 3, 5 } // Resize odd pages
};
resizeOptions.AddInput(new FileDataSource(input));
resizeOptions.AddOutput(new FileDataSource(@"C:\Docs\resized.pdf"));

optimizer.Process(resizeOptions);