/// <summary>
/// PPT产生缩略图
/// </summary>
/// <param name="filePath"></param>
/// <param name="previewPath"></param>
/// <returns></returns>
private static bool GetThumbnailPpt(string filePath, string previewPath)
{
bool result = false;
Presentation ppt = new Presentation();
try
{
ppt.LoadFromFile(filePath);
if (ppt.Slides.Count > 0)
{
//生成图片
foreach (IShape s in ppt.Slides[0].Shapes)
{
if (s is SlidePicture)
{
SlidePicture ps = s as SlidePicture;
ps.PictureFill.Picture.EmbedImage.Image.Save(previewPath);
if (File.Exists(previewPath))
{
result = true;
}
ps.Dispose();
}
if (s is PictureShape)
{
PictureShape ps = s as PictureShape;
ps.EmbedImage.Image.Save(previewPath);
if (File.Exists(previewPath))
{
result = true;
}
}
}
if (!result)
{
string temImage = Path.GetDirectoryName(previewPath) + "\\" + Guid.NewGuid().ToString() + ".emf";
ppt.Slides[0].SaveAsEMF(temImage);
Image image = Bitmap.FromFile(temImage);
image.Save(previewPath);
image.Dispose();
File.Delete(temImage);
if (File.Exists(previewPath))
{
result = true;
}
}
if (!result)
{
result = GetThumbnailWritten("PPT", previewPath);
}
}
ppt.Dispose();
}
catch
{
ppt.Dispose();
result = GetThumbnailWritten("PPT", previewPath);
}
return(result);
}
