c# - 替换段落 Open XML 中的文本

Question

我在幻灯片中有多个段落带有占位符 <<>>，我需要用实际文本替换占位符，但是替换后如果我使用打开的 xml SDK 检查文件，我会看到下面的行

 A.Run run54 = new A.Run();
 OpenXmlUnknownElement openXmlUnknownElement2 = OpenXmlUnknownElement.CreateOpenXmlUnknownElement("<p:text xmlns:p=\"http://schemas.openxmlformats.org/presentationml/2006/main\">Placeholder replaced Text</p:text>");
 run54.Append(openXmlUnknownElement2);

如果我真的打开文件，修复对话框出现，内容消失

下面是我用来替换文本的代码

  if (paragraph.InnerText.Contains(originalText))
                {
                    D.ParagraphProperties paragraphProperties6 = new D.ParagraphProperties() { Alignment = D.TextAlignmentTypeValues.Center };
                    D.DefaultRunProperties defaultRunProperties24 = new D.DefaultRunProperties();

                    paragraphProperties6.Append(defaultRunProperties24);

                    D.Run run6 = new D.Run();
                    D.RunProperties runProperties8 = new D.RunProperties() { Language = "en-US", FontSize = 2400, Bold = true };
                    runProperties8.SetAttribute(new OpenXmlAttribute("", "smtClean", "", "0"));
                    D.SolidFill solidFill72 = new D.SolidFill();

                    D.RgbColorModelHex rgbColorModelHex16 = new D.RgbColorModelHex() { Val = "808080" };
                    D.LuminanceModulation luminanceModulation1 = new D.LuminanceModulation() { Val = 75000 };
                    rgbColorModelHex16.Append(luminanceModulation1);
                    solidFill72.Append(rgbColorModelHex16);
                    runProperties8.Append(solidFill72);
                    string modifiedString = Regex.Replace(paragraph.InnerText, originalText, ReplaceText);
                    paragraph.RemoveAllChildren<Run>();
                    paragraph.AppendChild<Run>(new Run(new DocumentFormat.OpenXml.Presentation.Text(modifiedString)));
                    //D.Text text15 = new D.Text();
                    //text15.Text = new DocumentFormat.OpenXml.Presentation.Text(modifiedString).ToString();
                    run6.Append(runProperties8);
                    //run6.Append(text15);
                    D.EndParagraphRunProperties endParagraphRunProperties7 = new D.EndParagraphRunProperties() { Language = "en-US", FontSize = 2400, Bold = true, Dirty = false };
                    endParagraphRunProperties7.SetAttribute(new OpenXmlAttribute("", "smtClean", "", "0"));
                    D.SolidFill solidFill75 = new D.SolidFill();

                    D.RgbColorModelHex rgbColorModelHex19 = new D.RgbColorModelHex() { Val = "808080" };
                    D.LuminanceModulation luminanceModulation4 = new D.LuminanceModulation() { Val = 75000 };

                    rgbColorModelHex19.Append(luminanceModulation4);

                    solidFill75.Append(rgbColorModelHex19);
                    endParagraphRunProperties7.Append(solidFill75);
                    paragraph.Append(paragraphProperties6);
                    paragraph.Append(run6);
                    //paragraph11.Append(break1);
                    paragraph.Append(endParagraphRunProperties7);
                    break;
                }

如有任何帮助，我们将不胜感激

Answer 1

使用 openxml sdk 来反射(reflect)代码非常适合检查丢失的东西，但代码很难阅读，如果你在复制它时犯了一个错误，可能会导致大量空闲时间损失。

所以基本上你必须知道 openxml 元素的结构，这对于 word/powerpoint 都是一样的。这里是 paragraph|run|text 我忽略了段落的父级，在大多数情况下，它是 TextBody。

首先，您必须在运行元素中找到您的搜索模式。假设文本未拆分为多个 Run 元素。

IEnumerable<Run> runs = Paragraph.Descendants<Run>()
    .Where(el => el.InnerText.Contains("<<>>"));
if(runs != null) {
    foreach(Run run in runs) { 
        // Use this if using powerpoint openxml
        run.Text = new Text(run.InnerText.Replace("<<>>", "your text");

        // Use this if using wordprocessing openxml
        string innerText = run.InnerText.Replace("<<>>", "your text");
        run.RemoveAllChildren<Text>();
        run.AppendChild(new Text(innerText));
    }
}

如果模式被分成多个运行，您将必须迭代所有段落运行，并在找到整个模式后将每个运行文本添加到局部变量，您可以替换那些运行文本。我认为你会设法做到这一点。