/// <summary>
/// 实例化转换工具
/// </summary>
/// <param name="filePath">文件路径</param>
/// <param name="fileExtension">文件扩展名</param>
/// <param name="callBack">回调方法</param>
public Conversion(string filePath, string fileExtension, Action <int, string> callBack)
{
switch (fileExtension.ToLower())
{
case ".doc":
case ".docx":
ConversionFunc = new WordConversion();
break;
case ".pdf":
ConversionFunc = new PdfConversion();
break;
case ".xls":
case ".xlsx":
ConversionFunc = new ExcelConversion();
break;
case ".ppt":
case ".pptx":
ConversionFunc = new PptConversion();
break;
default:
throw new Exception("不支持的文件类型。");
}
FilePath = filePath;
ConversionFunc.CallBack = callBack;
}
public void ConvertToImage(string filePath, int resolution)
{
//先将Word转换为PDF文件
string pdfPath;
try
{
using (WordToPdf convert = new WordToPdf())
{
pdfPath = convert.ToPdf(filePath);
}
}
catch (COMException)
{
pdfPath = Path.ChangeExtension(filePath, "pdf");
if (!File.Exists(pdfPath))
{
Aspose.Words.Document doc = new Aspose.Words.Document(filePath);
doc.Save(pdfPath, Aspose.Words.SaveFormat.Pdf);
}
}
//再将PDF转换为图片
PdfConversion converter = new PdfConversion()
{
CallBack = CallBack
};
converter.ConvertToImage(pdfPath, resolution);
}
public void ConvertToImage(string filePath, int resolution)
{
Aspose.Slides.Presentation doc = new Aspose.Slides.Presentation(filePath);
//先将ppt转换为PDF文件
string tmpPdfPath = Path.ChangeExtension(filePath, "pdf");
doc.Save(tmpPdfPath, Aspose.Slides.Export.SaveFormat.Pdf);
//再将PDF转换为图片
PdfConversion converter = new PdfConversion()
{
CallBack = CallBack
};
converter.ConvertToImage(filePath, resolution);
}
public void ConvertToImage(string filePath, int resolution)
{
Aspose.Cells.Workbook doc = new Aspose.Cells.Workbook(filePath);
//先将Excel转换为PDF临时文件
string pdfPath = Path.ChangeExtension(filePath, "pdf");
doc.Save(pdfPath, Aspose.Cells.SaveFormat.Pdf);
//再将PDF转换为图片
PdfConversion converter = new PdfConversion()
{
CallBack = CallBack
};
converter.ConvertToImage(filePath, resolution);
}