我的目标：想要在幻灯片中显示我动态注入主要演示文稿的HTML。
到目前为止我所取得的成果：将Html转换为OpenXML（或更具体的WordML）然后将一个word对象嵌入到PowerPoint中，然后通过OpenXML SDK Productivity Tool分析结构，它创建了 embeddings 文件夹，其中包含我选择的文档。我打开演示文稿时看到的视图基本上是/ppt/media/image.emf中的图像。
现在我已经动态替换了嵌入式docx的内容，但是如何生成其图像以便我也可以更新视图？
或者是否有无痛解决方案？
答案 0 :(得分：1)
注意：对于WINFORMS C＃
好吧，我没有经历你在查询中写下的痛苦描述我相信你已经流下了很多汗水让它发挥作用，在这里我分享了无痛的解决方案（至少它对我有用）并且我相信它应该也适合你。
按如下方式创建一个类：（我已将此解决方案部分来自其他一些SO，抱歉不记得来源）
using System;
using System.Text.RegularExpressions;
using System.Windows.Forms;
public class HtmlFragment
{
#region Read and decode from clipboard
static public HtmlFragment FromClipboard()
{
string rawClipboardText = Clipboard.GetText(TextDataFormat.Html);
HtmlFragment h = new HtmlFragment(rawClipboardText);
return h;
}
/// <summary>
/// Create an HTML fragment decoder around raw HTML text from the clipboard.
/// This text should have the header.
/// </summary>
/// <param name="rawClipboardText">raw html text, with header.</param>
public HtmlFragment(string rawClipboardText)
{
// This decodes CF_HTML, which is an entirely text format using UTF-8.
// Format of this header is described at:
// http://msdn.microsoft.com/library/default.asp?url=/workshop/networking/clipboard/htmlclipboard.asp
// Note the counters are byte counts in the original string, which may be Ansi. So byte counts
// may be the same as character counts (since sizeof(char) == 1).
// But System.String is unicode, and so byte couns are no longer the same as character counts,
// (since sizeof(wchar) == 2).
int startHMTL = 0;
int endHTML = 0;
int startFragment = 0;
int endFragment = 0;
Regex r;
Match m;
r = new Regex("([a-zA-Z]+):(.+?)[\r\n]",
RegexOptions.IgnoreCase | RegexOptions.Compiled);
for (m = r.Match(rawClipboardText); m.Success; m = m.NextMatch())
{
string key = m.Groups[1].Value.ToLower();
string val = m.Groups[2].Value;
switch(key)
{
// Version number of the clipboard. Starting version is 0.9.
case "version":
m_version = val;
break;
// Byte count from the beginning of the clipboard to the start of the context, or -1 if no context
case "starthtml":
if (startHMTL != 0) throw new FormatException("StartHtml is already declared");
startHMTL = int.Parse(val);
break;
// Byte count from the beginning of the clipboard to the end of the context, or -1 if no context.
case "endhtml":
if (startHMTL == 0) throw new FormatException("StartHTML must be declared before endHTML");
endHTML = int.Parse(val);
m_fullText = rawClipboardText.Substring(startHMTL, endHTML - startHMTL);
break;
// Byte count from the beginning of the clipboard to the start of the fragment.
case "startfragment":
if (startFragment != 0) throw new FormatException("StartFragment is already declared");
startFragment = int.Parse(val);
break;
// Byte count from the beginning of the clipboard to the end of the fragment.
case "endfragment":
if (startFragment == 0) throw new FormatException("StartFragment must be declared before EndFragment");
endFragment = int.Parse(val);
m_fragment = rawClipboardText.Substring(startFragment, endFragment - startFragment);
break;
// Optional Source URL, used for resolving relative links.
case "sourceurl":
m_source = new System.Uri(val);
break;
}
} // end for
if (m_fullText == null && m_fragment == null)
{
throw new FormatException("No data specified");
}
}
// Data. See properties for descriptions.
string m_version;
string m_fullText;
string m_fragment;
System.Uri m_source;
/// <summary>
/// Get the Version of the html. Usually something like "1.0".
/// </summary>
public string Version
{
get { return m_version; }
}
/// <summary>
/// Get the full text (context) of the HTML fragment. This includes tags that the HTML is enclosed in.
/// May be null if context is not specified.
/// </summary>
public string Context
{
get { return m_fullText; }
}
/// <summary>
/// Get just the fragment of HTML text.
/// </summary>
public string Fragment
{
get { return m_fragment; }
}
/// <summary>
/// Get the Source URL of the HTML. May be null if no SourceUrl is specified. This is useful for resolving relative urls.
/// </summary>
public System.Uri SourceUrl
{
get { return m_source; }
}
#endregion // Read and decode from clipboard
#region Write to Clipboard
// Helper to convert an integer into an 8 digit string.
// String must be 8 characters, because it will be used to replace an 8 character string within a larger string.
static string To8DigitString(int x)
{
return String.Format("{0,8}", x);
}
/// <summary>
/// Clears clipboard and copy a HTML fragment to the clipboard. This generates the header.
/// </summary>
/// <param name="htmlFragment">A html fragment.</param>
/// <example>
/// HtmlFragment.CopyToClipboard("<b>Hello!</b>");
/// </example>
public static void CopyToClipboard(string htmlFragment)
{
CopyToClipboard(htmlFragment, null, null);
}
/// <summary>
/// Clears clipboard and copy a HTML fragment to the clipboard, providing additional meta-information.
/// </summary>
/// <param name="htmlFragment">a html fragment</param>
/// <param name="title">optional title of the HTML document (can be null)</param>
/// <param name="sourceUrl">optional Source URL of the HTML document, for resolving relative links (can be null)</param>
public static void CopyToClipboard(string htmlFragment, string title, Uri sourceUrl)
{
if (title == null) title = "From Clipboard";
System.Text.StringBuilder sb = new System.Text.StringBuilder();
// Builds the CF_HTML header. See format specification here:
// http://msdn.microsoft.com/library/default.asp?url=/workshop/networking/clipboard/htmlclipboard.asp
// The string contains index references to other spots in the string, so we need placeholders so we can compute the offsets.
// The <<<<<<<_ strings are just placeholders. We’ll backpatch them actual values afterwards.
// The string layout (<<<) also ensures that it can’t appear in the body of the html because the <
// character must be escaped.
string header =
@"Format:HTML Format
Version:1.0
StartHTML:<<<<<<<1
EndHTML:<<<<<<<2
StartFragment:<<<<<<<3
EndFragment:<<<<<<<4
StartSelection:<<<<<<<3
EndSelection:<<<<<<<3
";
string pre =
@"<!DOCTYPE HTML PUBLIC ""-//W3C//DTD HTML 4.0 Transitional//EN"">
<HTML><HEAD><TITLE>" + title + @"</TITLE></HEAD><BODY><!–StartFragment–>";
string post = @"<!–EndFragment–></BODY></HTML>";
sb.Append(header);
if (sourceUrl != null)
{
sb.AppendFormat("SourceURL:{0}", sourceUrl);
}
int startHTML = sb.Length;
sb.Append(pre);
int fragmentStart = sb.Length;
sb.Append(htmlFragment);
int fragmentEnd = sb.Length;
sb.Append(post);
int endHTML = sb.Length;
// Backpatch offsets
sb.Replace("<<<<<<<1", To8DigitString(startHTML));
sb.Replace("<<<<<<<2", To8DigitString(endHTML));
sb.Replace("<<<<<<<3", To8DigitString(fragmentStart));
sb.Replace("<<<<<<<4", To8DigitString(fragmentEnd));
// Finally copy to clipboard.
string data = sb.ToString();
Clipboard.Clear();
Clipboard.SetText(data, TextDataFormat.Html);
}
#endregion // Write to Clipboard
}
用法说明如下：
使用PowerPoint = Microsoft.Office.Interop.PowerPoint;
var oPowerPoint = new PowerPoint.Application();
oPowerPoint.Visible = Microsoft.Office.Core.MsoTriState.msoTrue;
我要求将内容粘贴到活动幻灯片上，因此我使用了以下代码，根据您的需要，您的逻辑可能会有所不同，您可以忽略以下代码行
var activeSlide = (PowerPoint.Slide)oPowerPoint.ActiveWindow.View.Slide;
将HTML内容提供给以下方法
HtmlFragment.CopyToClipboard(HTML CONTENT WILL COME HERE);
以下代码会将HTML粘贴到有效幻灯片中
oPowerPoint.ActiveWindow.View.PasteSpecial();
答案 1 :(得分：0)
我希望您能找到有关您问题的信息。
有点晚了，但未来的人可能会来这里。
这是针对HTML的 - ＆gt; PPT部分。
PowerPoint.Presentation presentation;
presentation = ppApp.Presentations.Open(configuration.PPTTExportedFile, MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoTrue);
foreach (PowerPoint.Slide slide in presentation.Slides)
{
foreach (PowerPoint.Shape shape in slide.Shapes)
{
File.WriteAllText(temporaryFilePath, html);
WebsiteToImage websiteToImage = new WebsiteToImage(temporaryFilePath, @"New picture path");
websiteToImage.Generate();
slide.Shapes.AddPicture(@"picture path", MsoTriState.msoTrue, MsoTriState.msoTrue, oldshapeleft, oldshapetop, oldshapewidth, oldshapeheight);
fileToDelete.Add(temporaryFilePath);
fileToDelete.Add(@""dont forget to remove tmp files");
}
}
Convert webpage to image from ASP.NET
如果您想在Word / Excel / PowerPoint中进行任何对象操作，我建议使用
Console.Write("AlternativeText: ");
Console.WriteLine(shape.AlternativeText);
因为如果在原始文件中保存对象中的AlternativeText，您可以快速访问它，甚至可以将PATH更改为一个简单的变量。
如果您希望例如导出HTML表格，请从中执行图像并更改AlternativeText以便以后更轻松地访问它，同时为其提供可以使用第3个软件工具访问的相应名称，因为PowerPoint不支持HTML标记
接下来做：
File.Copy(WordTemplateFile, WordExportedFile, true);
为什么要更改原件？只需制作副本，并将其保存为模板，您可以随时更改该模板，同时从中创建新的更改版本。（适用于报告）
如果您打算使用，AlternativeText非常有用。
如需更换，可能需要使用NetOffice / Microsoft Office库。
foreach (NetOffice.WordApi.InlineShape s in docWord.InlineShapes)
{
if (s.Type==NetOffice.WordApi.Enums.WdInlineShapeType.wdInlineShapePicture && s.AlternativeText.Contains("any pattern you are looking for"))
{
<Do your manipulation with image change it>
s.Range.InsertFile(<insert your new picture for example>);
}
}
循环浏览所有文件并检查某些内容是否适合您的模式。
祝你好运。