Rms操作设置office系统文档权限

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Common.Bll
{
    public class RmsWordHelper : IDisposable
    {
        /// <summary>
        /// Word 应用对象
        /// </summary>
        private Microsoft.Office.Interop.Word.ApplicationClass appWord;

        /// <summary>
        /// 文件路径
        /// </summary>
        private string fliePath;
        public string FliePath
        {
            get { return this.fliePath; }
            set { this.fliePath = value; }
        }

        /// <summary>
        /// 用户ID
        /// </summary>
        private string userId;
        public string UserId
        {
            get { return this.userId; }
            set { this.userId = value; }

        }
        /// <summary>
        /// 空值
        /// </summary>
        private Object MISSINGVALUE = System.Reflection.Missing.Value;

        /// <summary>
        /// 错误消息
        /// </summary>
        public string ErrMessage = string.Empty;


        /// <summary>
        /// RMS授权后的文件名称
        /// </summary>
        /// <returns></returns>
        private string GetRmsFileName()
        {
            string filename = string.Empty;
            filename = System.IO.Path.Combine(System.IO.Path.GetDirectoryName(this.fliePath), System.IO.Path.GetFileNameWithoutExtension(this.fliePath) + "RMS" + System.IO.Path.GetExtension(this.fliePath));
            return filename;
        }
        /// <summary>
        /// 操作保存
        /// </summary>
        /// <returns></returns>
        public bool Save()
        {
            this.ErrMessage = string.Empty;
            bool result = false;

            object filename_src = this.fliePath;
            object filename_dst = this.GetRmsFileName();

            try
            {
                if (this.appWord == null)
                {
                    this.appWord = new Microsoft.Office.Interop.Word.ApplicationClass();
                }

                var doc = this.appWord.Documents.Open(ref filename_src, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE);

                try
                {
                    doc.Activate();
                    doc.Permission.Enabled = true;
                    doc.Permission.Add(this.UserId, Microsoft.Office.Core.MsoPermission.msoPermissionRead, MISSINGVALUE);
                    doc.Permission.Add(this.UserId, Microsoft.Office.Core.MsoPermission.msoPermissionPrint, MISSINGVALUE);

                    doc.SaveAs2(ref filename_dst, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE);
                    result = true;
                }
                finally
                {

                    doc.Close(ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE);
                }
            }
            catch (Exception ex)
            {
                this.ErrMessage = ex.Message;
            }

            return result;
        }

        public void Dispose()
        {
            if (this.appWord != null)
            {
                this.appWord.Quit(ref MISSINGVALUE, ref MISSINGVALUE, ref MISSINGVALUE);
                this.appWord = null;
                GC.Collect();
            }

        }

    }
}