在 IIS 服务下使用 COM 在 C# 中将 PowerPoint 渲染为 png 时出现问题

发布于 2024-11-25 11:54:07 字数 984 浏览 1 评论 0原文

首先，我的程序可以将 pptx 渲染为 png，但在 Windows Server 2008 R2 上渲染时质量大大降低，我想知道为什么。

我使用 Cassini 在 Windows 7 x64 上测试了我的程序，并且将 pptx 渲染为 png 是完美的。但是，当我在 IIS 上部署程序并尝试渲染 pptx 时，其渲染质量会降低。

这是同一张图像的链接，一张在 Windows 7 cassini 下渲染，另一张在 Windows Server 2008 下渲染。

完美质量的一张：http://dl.dropbox.com/u/2458800/exemple-high-quality.png

低质量的：http://dl.dropbox.com/u/2458800/exemple-low-quality .png

这似乎是某种抗锯齿问题。

最后，这是我的代码：

var powerPoint = new Application();

var presentation = powerPoint.Presentations.Open(sourceFile,
      MsoTriState.msoFalse, MsoTriState.msoTriStateMixed, MsoTriState.msoFalse);

presentation.Export(destinationDir, "png", 960, 720);

presentation.Close();

powerPoint.Quit();

编辑：

我知道使用 PowerPoint COM 在服务器上会出现问题。尝试了Aspose，问题解决了。

原文

first of all, my program CAN render a pptx to png, the quality is just greatly reduced when rendering on Windows Server 2008 R2 and I'm wondering why.

I tested my program on windows 7 x64 using Cassini and the rendering to png of the pptx is perfect. But when I deploy my program on IIS and try to render the pptx, the quality of its rendering is reduced.

This is the link the same image, one rendered under windows 7 cassini and the other under windows server 2008.

The perfect quality one: http://dl.dropbox.com/u/2458800/exemple-high-quality.png

The low quality one: http://dl.dropbox.com/u/2458800/exemple-low-quality.png

It appears to be some sort of an antialiasing problem.

Finally, here is my code:

var powerPoint = new Application();

var presentation = powerPoint.Presentations.Open(sourceFile,
      MsoTriState.msoFalse, MsoTriState.msoTriStateMixed, MsoTriState.msoFalse);

presentation.Export(destinationDir, "png", 960, 720);

presentation.Close();

powerPoint.Quit();

EDIT:

Well I knew that going with PowerPoint COM would be a problem on a server. Tried Aspose and that solved the problem.

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