C# 快速獲取Word文檔結構

在網上搜了半天沒有直截了當的方法，要麼就是很慢，要麼就是要命的慢，通過自己的琢磨，終於能夠快速獲取word文檔的結構了。曬一曬，(*^__^*) 嘻嘻……。

 private void barButtonItem24_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            Microsoft.Office.Interop.Word.Document doc = (Microsoft.Office.Interop.Word.Document)(this.axFramerControl1.ActiveDocument);

            object x = doc.GetCrossReferenceItems(Microsoft.Office.Interop.Word.WdReferenceType.wdRefTypeHeading);
            Array strs = (Array)x;
            int pid = 0;
            int id = 0;
            System.Data.DataTable dt = new PrintHelper().DTStruct();
            //doc.Application.ScreenUpdating = false;
            int UpLevel = 0;
            DataRow drUP = null;
            for (int i = 0; i < strs.Length; i++)
            {
                object count = i + 1;
                string str = strs.GetValue(i + 1).ToString();
                string strtrm = str.TrimStart();
                DataRow dr = dt.NewRow();
                dr["SortFlag"] = i + 1;
                dr["ParagraphIndex"] = i + 1;
                dr["Name"] = strtrm;                
                int level = str.Length - strtrm.Length;
                dr["Level"] = level;               
                if (level == 0)
                {
                    dr["ParentID"] = 0;
                    UpLevel = 0;
                    object Heading = (int)Microsoft.Office.Interop.Word.WdGoToItem.wdGoToHeading;
                    doc.Application.Selection.GoTo(ref Heading, ref missing, ref count, ref missing);
                    dr["SectionNumber"] = doc.Application.Selection.get_Information(Microsoft.Office.Interop.Word.WdInformation.wdActiveEndSectionNumber);               
               
                }
                else
                {
                    if (level - UpLevel == 0)
                    {
                        dr["ParentID"] = drUP["ParentID"];
                        dr["SectionNumber"] = drUP["SectionNumber"];
                       
                    }
                    else
                        if (level - UpLevel > 0)
                        {
                            dr["ParentID"] = drUP["ID"];
                            dr["SectionNumber"] = drUP["SectionNumber"];
                        }
                        else
                        {
                            dr["ParentID"] = ParetnID(i - 1, dt, level)["ParentID"];
                            dr["SectionNumber"] = ParetnID(i - 1, dt, level)["SectionNumber"];
                        }
                
                
                }
                dt.Rows.Add(dr);
               UpLevel=level;
                drUP = dr;
            }
           // doc.Application.ScreenUpdating = true;            

        }
        DataRow ParetnID(int rowindex, System.Data.DataTable dt, int level)
        {
          //  object parentID = DBNull.Value;
            DataRow dr=dt.NewRow();
            for (int i = rowindex; i >= 0; i--)
            {
                if (dt.Rows[i]["Level"].ToString() == level.ToString())
                {
                    dr = dt.Rows[i];
                    break;
                }
            }
            return dr;
        }