代码如下： 

#region 打开Word文档,并且返回对象wDoc,wDoc
  /// <summary>
  /// 打开Word文档,并且返回对象wDoc,wDoc
  /// </summary>
  /// <param name="FileName">完整Word文件路径+名称</param>  
  /// <param name="wDoc">返回的Word.Document wDoc对象</param>
  /// <param name="WApp">返回的Word.Application对象</param>
  public static void CreateWordDocument(string FileName,ref Word.Document wDoc,ref  Word.Application WApp)
  {
   if(FileName == "") return;
   Word.Document thisDocument = null;
   Word.FormFields   formFields = null;
   Word.Application thisApplication = new Word.ApplicationClass();
   thisApplication.Visible = true;
   thisApplication.Caption = "";
   thisApplication.Options.CheckSpellingAsYouType = false;
   thisApplication.Options.CheckGrammarAsYouType = false; 

   Object filename = FileName;
   Object ConfirmConversions = false;
   Object ReadOnly = true;
   Object AddToRecentFiles = false; 

   Object PasswordDocument = System.Type.Missing;
   Object PasswordTemplate = System.Type.Missing;
   Object Revert = System.Type.Missing;
   Object WritePasswordDocument = System.Type.Missing;
   Object WritePasswordTemplate = System.Type.Missing;
   Object Format = System.Type.Missing;
   Object Encoding = System.Type.Missing;
   Object Visible = System.Type.Missing;
   Object OpenAndRepair = System.Type.Missing;
   Object DocumentDirection =  System.Type.Missing;
   Object NoEncodingDialog = System.Type.Missing;
   Object XMLTransform = System.Type.Missing; 

   try
   {
    Word.Document wordDoc =
     thisApplication.Documents.Open(ref filename, ref ConfirmConversions,
     ref ReadOnly, ref AddToRecentFiles, ref PasswordDocument, ref PasswordTemplate,
     ref Revert,ref WritePasswordDocument, ref WritePasswordTemplate, ref Format,
     ref Encoding, ref Visible, ref OpenAndRepair, ref DocumentDirection,
     ref NoEncodingDialog, ref XMLTransform );
    
    thisDocument = wordDoc;
    wDoc = wordDoc;
    WApp = thisApplication;
    formFields = wordDoc.FormFields;
   }
   catch(Exception ex)
   {
    MessageBox.Show(ex.Message);
   }
   
  }
  #endregion 


//调用上面静态方法，打开目标文件并且把DataGrid中数据填充到对应Word标签中去