/// <summary>
/// 获得PDF文件的预览图
/// </summary>
/// <param name="path">文档路径</param>
/// <returns>PDF的预览</returns>
public static async Task <IRandomAccessStream> GetPDFPreviewAsync(string path, uint p = 0)
{
StorageFile pdfFile;
try
{
pdfFile = await StorageFile.GetFileFromPathAsync(path);
var pdf = await Windows.Data.Pdf.PdfDocument.LoadFromFileAsync(pdfFile);
var page = pdf.GetPage(p);
currentPdfCount = pdf.PageCount;
currentPdfPage = p;
currentPdfPath = path;
InMemoryRandomAccessStream ms = new InMemoryRandomAccessStream();
await page.RenderToStreamAsync(ms);
currentFileType = PreviewModel.FileType.Pdf;
return(ms);
}
catch (Exception)
{
return(await GetPicPreviewAsync(defaultPicPath));
}
}
/// <summary>
/// 获得图片文件的预览图
/// </summary>
/// <param name="path">图片路径</param>
/// <returns>图片的预览</returns>
public static async Task <IRandomAccessStream> GetPicPreviewAsync(string path, bool inner = false)
{
{
StorageFile file;
if (inner == false)
{
file = await StorageFile.GetFileFromPathAsync(path);
}
else
{
file = await StorageFile.GetFileFromApplicationUriAsync(new Uri(path));
}
var res = await file.OpenAsync(FileAccessMode.Read);
currentFileType = PreviewModel.FileType.Picture;
return(res);
}
}
/// <summary>
/// 获得Word文件的预览图
/// </summary>
/// <param name="path">文件路径</param>
/// <returns>Word的预览</returns>
public static async Task <IRandomAccessStream> GetWordPreviewAsync(string path)
{
StorageFile file = await StorageFile.GetFileFromPathAsync(path);
var res = await file.OpenAsync(FileAccessMode.Read);
WordDocument wordDocument = new WordDocument();
wordDocument.Open(res.AsStream(), Syncfusion.DocIO.FormatType.Automatic);
DocIORenderer render = new DocIORenderer();
Syncfusion.Pdf.PdfDocument pdfDocument = render.ConvertToPDF(wordDocument);
render.Dispose();
wordDocument.Dispose();
InMemoryRandomAccessStream ms = new InMemoryRandomAccessStream();
pdfDocument.Save(ms.AsStream());
currentFileType = PreviewModel.FileType.Office;
return(await GetPDFPreviewFromStreamAsync(ms));
}
