用OpenXml在文档的尾部添加一个Rich Text Content Control/Plain

实现环境：Visual Studio 2010, OpenXml SDK 2.0

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 
using DocumentFormat.OpenXml.Packaging; 
using DocumentFormat.OpenXml.Wordprocessing; 
 
namespace OpenXmlWordSdtBlock 
{ 
    public partial class Form1 : Form 
    { 
        public Form1() 
        { 
            InitializeComponent(); 
        } 
 
        private void button1_Click(object sender, EventArgs e) 
        { 
            OpenFileDialog objOpenFileDialog = new OpenFileDialog(); 
            objOpenFileDialog.Filter = "Word Document (*.docx)|*.docx"; 
            objOpenFileDialog.ShowDialog(); 
            string strPath = objOpenFileDialog.FileName; 
            Form2 objForm2 = new Form2(); 
            objForm2.ShowDialog(); 
            string strInsertText = objForm2.Msg; 
            if (strPath.Length > 0) 
            { 
                try 
                { 
                    using (WordprocessingDocument objWordprocessingDocument = 
                        WordprocessingDocument.Open(strPath, true)) 
                    { 
                        /*
                         * 接下来的代码将获取MainDocumentPart、Document和Body。