好的,我有一个问题,让我再次感到困惑。我有一些代码将DOC文件转换为PNG文件。当我在本地主机上执行此操作时,图像很好。当我使用相同的代码并将其放在实时服务器上时,图像非常小(与我收到DOC文件的DOT文件大小相同,基本上DOT被填写并变成DOC)。现在......这是疯狂的部分。如果我以管理员身份登录托管服务器,然后转到实时网站,即使我从iPhone上访问该网站,图像仍然很大且很清晰。一旦我退出托管服务器并刷新实时页面,图像就会再次变小。这是我用来将DOC转换为PNG的代码。另外,如果我使用方法2,我可以使图像更大,分辨率更高,但字体不合适。
private void ConvertDocToPNG(string startupPath, string filename1)
{
var docPath = Path.Combine(startupPath, filename1);
Application app = new Application();
Microsoft.Office.Interop.Word.Document doc = new Microsoft.Office.Interop.Word.Document();
app.Visible = false;
doc = app.Documents.Open(docPath);
app.WindowState = Microsoft.Office.Interop.Word.WdWindowState.wdWindowStateMaximize;
app.ActiveWindow.ActivePane.View.Zoom.Percentage = 100;
doc.ShowGrammaticalErrors = false;
doc.ShowRevisions = false;
doc.ShowSpellingErrors = false;
//Opens the word document and fetch each page and converts to image
foreach (Microsoft.Office.Interop.Word.Window window in doc.Windows)
{
foreach (Microsoft.Office.Interop.Word.Pane pane in window.Panes)
{
for (var i = 1; i <= pane.Pages.Count; i++)
{
Microsoft.Office.Interop.Word.Page page = null;
bool populated = false;
while (!populated)
{
try
{
// This !@#$ variable won't always be ready to spill its pages. If you step through
// the code, it will always work. If you just execute it, it will crash. So what
// I am doing is letting the code catch up a little by letting the thread sleep
// for a microsecond. The second time around, this variable should populate ok.
page = pane.Pages[i];
populated = true;
}
catch (COMException ex)
{
Thread.Sleep(1);
}
}
var bits = page.EnhMetaFileBits;
var target = Path.Combine(startupPath + "\\", string.Format("{1}_page_{0}", i, filename1.Split('.')[0]));
try
{
using (var ms = new MemoryStream((byte[])(bits)))
{
var image = System.Drawing.Image.FromStream(ms);
var pngTarget = Path.ChangeExtension(target, "png");
// Method 2
image.Save(pngTarget, System.Drawing.Imaging.ImageFormat.Png);
// Another way to save it using custom size
//float width = Convert.ToInt32(hfIdCardMaxWidth.Value);
//float height = Convert.ToInt32(hfIdCardMaxHeight.Value);
//float scale = Math.Min(width / image.Width, height / image.Height);
//int resizedWidth = (int)Math.Round(image.Width * scale);
//int resizedHeight = (int)Math.Round(image.Height * scale);
//Bitmap myBitmap = new Bitmap(image, new Size(resizedWidth, resizedHeight));
//myBitmap.Save(pngTarget, System.Drawing.Imaging.ImageFormat.Png);
}
}
catch (System.Exception ex)
{
doc.Close(true, Type.Missing, Type.Missing);
Marshal.ReleaseComObject(doc);
doc = null;
app.Quit(true, Type.Missing, Type.Missing);
Marshal.ReleaseComObject(app);
app = null;
throw ex;
}
}
}
}
doc.Close(true, Type.Missing, Type.Missing);
Marshal.ReleaseComObject(doc);
doc = null;
app.Quit(true, Type.Missing, Type.Missing);
Marshal.ReleaseComObject(app);
app = null;
}
答案 0 :(得分:1)
鉴于您以无人值守的方式使用互操作,可能会发生各种奇怪/意外的事情。我承认,我不知道为什么你会遇到在不同环境中给出测试用例的症状。我有一种非常强烈的感觉,无人看管是罪魁祸首。互操作在用户的登录环境中运行,如果没有用户......那么......是的。那么,如何解决这个问题仍然无人看管?首先想到的是使用OpenXML SDK。这是以无人值守的方式操作Office文档的安全方式。我将它用于无人值守的报告生成。
假设:
API:
http://www.microsoft.com/en-us/download/details.aspx?id=30425
但是,您无法使用OpenXML将文档转换为图像!我想到了一个解决方法,但是没有经过测试。我们的想法是将doc转换为html,然后渲染出html并将其填充到图像中。
以下是使用OpenXML将word doc转换为HTML的方法:
可以做各种便利事情的大型电动工具: http://powertools.codeplex.com/
这是一个方便的库,用于呈现HTML并将其转储到图像中: http://htmlrenderer.codeplex.com/
答案 1 :(得分:0)
using (var ms = new MemoryStream((byte[])(bits)))
{
var emf = new Metafile(ms);
var scale = 400 / emf.HorizontalResolution;
var Width= emf.Width * scale;
var Height = emf.Height * scale;
System.Drawing.Bitmap b = new System.Drawing.Bitmap((Int32)Width, (Int32)Height);
var G = System.Drawing.Graphics.FromImage(b);
G.Clear(System.Drawing.Color.White);
G.DrawImage(emf, 0, 0, (float)Width, (float)Height);
b.Save(pngTarget, System.Drawing.Imaging.ImageFormat.Png);
}