在PowerPoint中顯示HTML

Question

我的目標：想要在幻燈片中顯示HTML，並將其動態注入到主演示中。

到目前為止，我已經完成了什么：將 HTML轉換為OpenXML（或更具體地講是WordML），然后將一個Word對象嵌入PowerPoint中，然后通過OpenXML SDK生產率工具分析結構，它創建了embeddings文件夾，其中包含我的文檔選中，打開演示文稿時看到的視圖基本上是/ppt/media/image.emf中的圖像。

現在，我已經動態替換了嵌入式docx的內容，但是如何生成其圖像，以便也可以更新視圖？

還是有無痛的解決方案？

Answer 1

注意：對於WINFORMS C＃

好的，我沒有遍歷您在查詢中寫的疼痛描述，我相信您已經付出了很多汗水才能使它起作用，在這里，我分享了無痛解決方案（至少對我有用），我相信應該也為您工作。

創建一個如下所示的類：（我從其他方法中獲得了部分解決方案，對不起，我不記得源代碼了）

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
    }

用法說明如下：

使用PowerPoint = Microsoft.Office.Interop.PowerPoint;

var oPowerPoint = new PowerPoint.Application();
oPowerPoint.Visible = Microsoft.Office.Core.MsoTriState.msoTrue; 

我需要將內容粘貼到活動幻燈片上，因此我使用了以下代碼，根據您的需要，您的邏輯可能會有所不同，您可以忽略以下代碼行

 var activeSlide = (PowerPoint.Slide)oPowerPoint.ActiveWindow.View.Slide;

將您的HTML內容輸入以下方法

HtmlFragment.CopyToClipboard(HTML CONTENT WILL COME HERE);

下面的代碼會將HTML粘貼到活動幻燈片中

oPowerPoint.ActiveWindow.View.PasteSpecial();

Answer 2

希望您能找到有關您的問題的信息。

有點晚了，但是對於將來可能會來這里的人們。

這用於HTML-> 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");
    }
}

將網頁從ASP.NET轉換為圖像

如果要在Word / Excel / PowerPoint中進行任何對象操作，建議使用

Console.Write("AlternativeText: ");
Console.WriteLine(shape.AlternativeText);

因為如果將原始文本中的AlternativeText保存在對象中，則可以快速訪問它，甚至可以將PATH更改為簡單變量。

並且，例如，如果您要導出HTML表，則可以從中進行圖像處理並更改AlternativeText，以便以后可以更輕松地訪問它，同時為其指定一個適當的名稱，您可以使用第3個軟件工具來訪問它，因為PowerPoint不會支持HTML標簽

下一步要做：

File.Copy(WordTemplateFile, WordExportedFile, true);

為什么要更改原件？ 只需制作一份副本，並將其保留為模板即可，您可以隨時從中創建新的更改版本。（適用於報告）

如果您打算使用AlternativeText，它將非常有用。

要進行替換，您可能需要使用NetOffice / Microsoft Office庫。

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>);
    }
 }

您遍歷所有文件，並檢查是否適合您的模式。

祝好運。