PM> Install-Package Spire.Doc

using Spire.Doc;
using Spire.Doc.Documents;

namespace SpireDocDemo
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //創(chuàng)建一個新的文檔對象
            Document document = new Document();

            //從指定路徑加載文檔
            document.LoadFromFile("Sample1.docx");

            //獲取文檔的第一個節(jié)
            Section section = document.Sections[0];

            //創(chuàng)建一個權(quán)限開始對象
            PermissionStart permissionStart = new PermissionStart(document, "restricted1");

            //創(chuàng)建一個權(quán)限結(jié)束對象
            PermissionEnd permissionEnd = new PermissionEnd(document, "restricted1");

            //獲取該節(jié)中的第二段
            Paragraph paragraph = section.Paragraphs[1];

            //在段落開頭插入權(quán)限開始對象
            paragraph.ChildObjects.Insert(0, permissionStart);

            //在段落末尾添加權(quán)限結(jié)束對象
            paragraph.ChildObjects.Add(permissionEnd);

            //將文檔設(shè)置為只讀保護
            document.Protect(ProtectionType.AllowOnlyReading, "123456");

            //將修改后的文檔保存到指定路徑
            document.SaveToFile("AddedEditingPermissionsArea.docx", FileFormat.Docx);

            //關(guān)閉文檔并釋放文檔對象占用的資源
            document.Close();
            document.Dispose();
        }
  }
}

using Spire.Doc;
using Spire.Doc.Documents;

namespace SpireDocDemo
{
    internal class Program
    {
        static void Main(string[] args)
        {
             //創(chuàng)建一個新的文檔對象
            Document document = new Document();

            //從指定路徑加載文檔
            document.LoadFromFile("Sample2.docx");

            //遍歷文檔的各個節(jié)
            for (int a = 0; a < document.Sections.Count; a++)
            {
                //獲取當前節(jié)的正文
                Body body = document.Sections[a].Body;

                //遍歷正文中的子對象
                for (int i = 0; i < body.ChildObjects.Count; i++)
                {
                    //檢查子對象是否為段落
                    if (body.ChildObjects[i] is Paragraph)
                    {
                        //獲取當前段落
                        Paragraph paragraph = (Paragraph)body.ChildObjects[i];

                        //從段落的最后一個子對象開始向前遍歷
                        for (int j = paragraph.ChildObjects.Count - 1; j >= 0; j--)
                        {
                            //獲取當前子對象
                            DocumentObject documentObject = paragraph.ChildObjects[j];

                            //如果是權(quán)限開始對象，移除它
                            if (documentObject.DocumentObjectType == DocumentObjectType.PermissionStart)
                            {
                                paragraph.ChildObjects.RemoveAt(j);
                            }
                            //如果是權(quán)限結(jié)束對象，移除它
                            else if (documentObject.DocumentObjectType == DocumentObjectType.PermissionEnd)
                            {
                                paragraph.ChildObjects.RemoveAt(j);
                            }
                        }
                    }
                }
            }

            //將修改后的文檔保存到指定路徑
            document.SaveToFile("RemovedEditingPermissionsArea.docx", FileFormat.Docx);

            //關(guān)閉文檔并釋放文檔對象占用的資源
            document.Close();
            document.Dispose();
        }
    }
}