OnDoc/DocIO_Demo_SHU/Form1.cs

using Syncfusion.DocIO;
using Syncfusion.DocIO.DLS;

using System.IO;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;
using System.Text.RegularExpressions;

namespace DocIO_Demo_SHU
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public void Lic()
        {
            Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("Ngo9BigBOggjHTQxAR8/V1NCaF5cXmZCf1FpRmJGdld5fUVHYVZUTXxaS00DNHVRdkdnWXdecXRdQ2heUU13XUI=");
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            Lic();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            using (WordDocument document = new WordDocument(textBox1.Text))
            {
                int fileId = 1;

                foreach (WSection section in document.Sections)
                {
                    //Create new Word document
                    using (WordDocument newDocument = new WordDocument())
                    {
                        //Add cloned section into new Word document
                        newDocument.Sections.Add(section.Clone());
                        //Saves the Word document to  MemoryStream
                        using (FileStream outputStream = new FileStream(textBox1.Text + fileId + ".docx", FileMode.OpenOrCreate, FileAccess.ReadWrite))
                        {
                            newDocument.Save(outputStream, FormatType.Dotm);
                        }
                    }
                    fileId++;
                }
                return;

                document.Open(textBox1.Text);
                document.UpdateDocumentFields();
                document.Save(textBox1.Text + ".dotm");
                try
                {
                    foreach (WSection section in document.Sections)
                        //Iterates through section child elements
                        foreach (WTextBody textBody in section.ChildEntities)
                        {
                            //Iterates through form fields
                            foreach (WFormField formField in textBody.FormFields)
                            {
                                if (formField.Name == "txtDruckenExemplar")
                                {
                                    formField.Text = "für die Bank";
                                    break;
                                }

                            }
                        }
                }
                catch { }
                try
                {
                    foreach (WSection section in document.Sections)
                        //Iterates through section child elements
                        foreach (WTextBody textBody in section.ChildEntities)
                        {
                            //Iterates through form fields
                            foreach (WFormField formField in textBody.FormFields)
                            {
                                if (formField.Name == "BesBest")
                                {
                                    formField.Text = "";
                                    break;
                                }

                            }
                        }
                }
                catch { }

                //BookmarksNavigator bookmarkNavigator = new BookmarksNavigator(document);
                //bookmarkNavigator.MoveToBookmark("txtDruckenExemplar");
                //bookmarkNavigator.InsertText("für die anderen");
                document.UpdateDocumentFields();
                document.Save(textBox1.Text + ".dotm.dotm");

            }
        }

    }
}