Insert table at the specified location in word document

[zhangymsir]

Npoi version: 2.5.4
Description: For example, insert a table between two more paragraphs or directly replace self defined text placeholder with tables，If there is a solution，please give advice or comments, many thanks.

[tonyqus]

https://stackoverflow.com/questions/31835579/insert-table-into-a-word-document-at-a-specific-position-using-apache-poi

[tonyqus]

However, XmlCursor in NPOI is not correctly implemented.

npoi/ooxml/XWPF/Usermodel/IBody.cs

Line 110 in 649cf37

XWPFTable InsertNewTbl(/*XmlCursor*/XmlDocument cursor);

InsertNewTbl should have a XmlCursor argument instead

[constantinje]

I need this too.
Do you have a due date for this enhancement ?
I hope no having the need to use another library

[tonyqus]

There is no same thing like XmlCursor in .NET. It's the weakness of .NET xml library. I'm afraid this feature will NOT be available until 2024.

[cbs-cbt]

Hello,
I also have this problem.

This question has been asked several times:

• https://github.com/nissl-lab/npoi/issues/1144#issue-1830713334
• https://github.com/nissl-lab/npoi/issues/899#issue-1325486697
• https://github.com/nissl-lab/npoi/issues/607#issue-958634163

Here's how I solved it by modifying the NPOI library.

I just added an optional argument pos which is the position of the table in the document. For example, if you want to insert it before a paragraph, you can use XWPFDocument.GetPosOfParagraph to get the position of the paragraph and then use that value in the pos argument of CreateTable

Two functions need to be modified.

NPOI.XWPF.UserModel.XWPFDocument.CreateTable:

public XWPFTable CreateTable(int rows, int cols, int? pos = null)
{
    XWPFTable table = new XWPFTable(ctDocument.body.AddNewTbl(pos), this, rows, cols);
    
    if(pos.HasValue)
    {
        bodyElements.Insert(pos.Value, table);
    }
    else
    {
        bodyElements.Add(table);
    }
    
    tables.Add(table);
    
    return table;
}

NPOI.OpenXmlFormats.Wordprocessing.CBT_Body.AddNewTbl:

public CT_Tbl AddNewTbl(int? pos = null)
{
  CT_Tbl tbl = new CT_Tbl();

  lock (this)
  {
    if(pos.HasValue)
    {
      this.itemsField.Insert(pos.Value, tbl);
      this.itemsElementNameField.Insert(pos.Value, DocumentBodyItemChoiceType.tbl);
    }
    else
    {
      this.itemsField.Add(tbl);
      this.itemsElementNameField.Add(DocumentBodyItemChoiceType.tbl);
    }
  }

  return tbl;
}

I tested this code briefly with a basic document that my program modifies by inserting a table in place of a paragraph and it works, but that's the only test I've done.
Do you think that these modifications are sufficient to properly define the position of a table in the document?

[tonyqus]

@cbs-cbt Thank you for your code contribution. I think it is workable although it's not as powerful as XmlCursor.

While using XmlCursor, it can follow the position of the specific paragraph

cursor = p.getCTP().newCursor();
XWPFTable t2 = document.insertNewTbl(cursor);

[tonyqus]

@cbs-cbt I put your name in the contributor list in release notes