在PowerPoint中显示HTML [英] Showing HTML in PowerPoint
问题描述
我的目标:要在幻灯片中显示HTML，并将其动态注入到主演示文稿中.
My Goal: Want to show HTML in Slide which I dynamically inject into a Master Presentation.
到目前为止，我已经完成了什么:将HTML转换为OpenXML(或更具体地讲是WordML)，然后将一个Word对象嵌入到PowerPoint中，然后通过OpenXML SDK Productivity Tool对其结构进行了分析，已创建 embedddings 文件夹，其中包含我选择的文档.打开演示文稿时看到的视图基本上是/ppt/media/image.emf中的图像.
What I've achieved So far: Converted Html to OpenXML (or WordML to be more specific) then Embedded a word object into the PowerPoint and then analyzed the structure via OpenXML SDK Productivity Tool, It has created embeddings folder which contains the document I've selected, The view which I see when I open presentation is basically an Image which is in /ppt/media/image.emf.
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，以便也可以更新视图?
Now I've dynamically replaced the contents of embedded docx but how can I generate its image so that I can update the view as well?
还是有一种无痛的解决方案?
Or is there a pain free solution?
推荐答案
注意:对于WINFORMS C#
好的，我没有遍历您在查询中写的痛苦描述，我相信您已经付出了很多汗水才能使它起作用，在这里，我分享了无痛苦的解决方案(至少对我有用)，我相信应该也为您工作.
NOTE: For WINFORMS C#
OK, I didn't go through the pain description you wrote in your query I believe you have shed a lot of sweat to make it work, here I am sharing the pain free solution(at least it worked for me) and I believe it should work for you too.
创建如下所示的类:(我从其他方法中部分获得了此解决方案，对不起，我不记得源代码了)
Create a class as below: (I have taken this solution partially from some other SO, sorry don't remember the source)
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
}
用法解释如下:
使用PowerPoint = Microsoft.Office.Interop.PowerPoint;
using PowerPoint = Microsoft.Office.Interop.PowerPoint;
var oPowerPoint = new PowerPoint.Application();
oPowerPoint.Visible = Microsoft.Office.Core.MsoTriState.msoTrue;
我需要将内容粘贴到活动幻灯片上，因此我使用下面的代码，根据您的需要，您的逻辑可能会有所不同，您可以忽略下面的代码行
I had a requirement to paste the content on the active slide so I used the below code, your logic could be different depending on your need you can ignore the below code line
var activeSlide = (PowerPoint.Slide)oPowerPoint.ActiveWindow.View.Slide;
将HTML内容输入以下方法
HtmlFragment.CopyToClipboard(HTML CONTENT WILL COME HERE);
下面的代码会将HTML粘贴到活动幻灯片中
oPowerPoint.ActiveWindow.View.PasteSpecial();
这篇关于在PowerPoint中显示HTML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
