Word open xml的富文本内容控件中的新行

Question

I have a Word document that has a Rich text Content Control .

I want to add text with new line.

using (WordprocessingDocument theDoc = WordprocessingDocument.Open(docName, true))
 {
   MainDocumentPart mainPart = theDoc.MainDocumentPart;
   foreach (SdtElement sdt in mainPart.Document.Descendants<SdtElement>())
     {
        SdtAlias alias = sdt.Descendants<SdtAlias>().FirstOrDefault();
        if (alias != null)
          {
            string sdtTitle = alias.Val.Value;
            var t = sdt.Descendants<Text>().FirstOrDefault();
             if (sdtTitle == "Body")
               {
                 t.Text = "Welcome to Yazd With its winding lanes, forest of badgirs,\r\n mud-brick houses and delightful places to stay, Yazd is a 'don't miss' destination. On a flat plain ringed by mountains, \r\nthe city is wedged between the northern Dasht-e Kavir and southern Dasht-e Lut and is every inch a city of the desert." }
         }
     }
}

I use a text with \r\n but don't add new line.

Answer 1

Some characters like tabs, new lines, etc. are defined with a special XML element.
For your case, you need <w:br/> element so try something like the following:

using (WordprocessingDocument theDoc = WordprocessingDocument.Open(docName, true))
{
    MainDocumentPart mainPart = theDoc.MainDocumentPart;
    foreach (SdtElement sdt in mainPart.Document.Descendants<SdtElement>())
    {
        SdtAlias alias = sdt.Descendants<SdtAlias>().FirstOrDefault();
        if (alias != null && alias.Val.Value == "Body")
        {
            var run = sdt.Descendants<Run>().FirstOrDefault();
            run.RemoveAllChildren<Text>();

            var text = "Welcome to Yazd With its winding lanes, forest of badgirs,\r\n mud-brick houses and delightful places to stay, Yazd is a 'don't miss' destination. On a flat plain ringed by mountains, \r\nthe city is wedged between the northern Dasht-e Kavir and southern Dasht-e Lut and is every inch a city of the desert.";
            var lines = text.Split(new string[] { "\r\n" }, StringSplitOptions.None);

            foreach (var line in lines)
            {
                run.AppendChild(new Text(line));
                run.AppendChild(new Break());
            }

            run.Elements<Break>().Last().Remove();
        }
    }
}

I hope this helps.

Answer 2

Assuming you do want to restrict your function to Rich Text Content Controls, ie, block-level structured document tags, you would be looking for instances of SdtBlock . Using SdtElement , you would also find inline-level ( SdtRun ), row-level ( SdtRow ), and cell-level ( SdtCell ) structured document tags, because SdtBlock , SdtRun , SdtRow , and SdtCell are subclasses of SdtElement .

The following is a straightforward implementation that assumes the Rich Text Content Control is supposed to contain only the multi-line text. It trims the lines because the sample text contains what looks like extraneous spaces.

public void AddMultiLineTextToRichTextContentControlsUsingRuns()
{
    // Produce the list of lines from the text separated by "\r\n"
    // in the question, trimming leading and trailing whitespace.
    const string text = "Welcome to Yazd With its winding lanes, forest of badgirs,\r\n mud-brick houses and delightful places to stay, Yazd is a 'don't miss' destination. On a flat plain ringed by mountains, \r\nthe city is wedged between the northern Dasht-e Kavir and southern Dasht-e Lut and is every inch a city of the desert.";
    string[] separator = { "\r\n" };

    List<string> lines = text
        .Split(separator, StringSplitOptions.None)
        .Select(line => line.Trim())
        .ToList();

    // Get the w:document element.
    const string path = @"path\to\your\document.docx";
    using WordprocessingDocument wordDocument = WordprocessingDocument.Open(path, true);
    Document document = wordDocument.MainDocumentPart.Document;

    // Get all Rich Text (i.e., block) w:sdt elements having a w:alias
    // descendant with w:val="Body".
    IEnumerable<SdtBlock> sdts = document
        .Descendants<SdtBlock>()
        .Where(sdt => sdt.Descendants<SdtAlias>().Any(alias => alias.Val == "Body"));

    foreach (SdtBlock sdt in sdts)
    {
        // Create one w:r element per line, prepending a w:br to the
        // second and following runs.
        IEnumerable<Run> runs = lines
            .Select((line, index) =>
                index == 0
                    ? new Run(new Text(line))
                    : new Run(new Break(), new Text(line)));

        // Create or replace the w:sdtContent element with one that has
        // a single w:p with one or more w:r children.
        sdt.SdtContentBlock = new SdtContentBlock(new Paragraph(runs));
    }
}