xml的导入和导出

将数据库里的数据导出到xml文件：

string str = ConfigurationManager.ConnectionStrings["sqlcnn"].ConnectionString;

        SqlConnectioncon = new SqlConnection(str);

        SqlCommandcmd = con.CreateCommand();

        con.Open();

        cmd.CommandText = "select * from book";

        cmd.ExecuteScalar();

        SqlDataAdapteradapter = new SqlDataAdapter(cmd);

        DataTabledt = new DataTable();

        adapter.Fill(dt);

        XElementxmlbookstore = new XElement("bookstore");

        for (int i = 0; i < dt.Rows.Count; i++)

        {

            XElementxmlbook = new XElement("book");

            XElementxmltitle = new XElement("title", dt.Rows[i]["title"].ToString());

            XElementxmlauthor = new XElement("author", dt.Rows[i]["author"].ToString());

            XElementxmlyear = new XElement("year", dt.Rows[i]["year"].ToString());

            XElementxmlprice = new XElement("price", dt.Rows[i]["price"].ToString());

            xmlbook.Add(xmltitle);

            xmlbook.Add(xmlauthor);

            xmlbook.Add(xmlyear);

            xmlbook.Add(xmlprice);

            xmlbookstore.Add(xmlbook);

        }

        FileStreamstream = File.OpenWrite(Server.MapPath("a.xml"));

        StreamWriterwriter = new StreamWriter(stream);

        writer.Write(xmlbookstore.ToString());

        writer.Flush();

        writer.Dispose();

将xml文件导入到数据库：

string str = ConfigurationManager.ConnectionStrings["sqlcnn"].ConnectionString;

        Streamreader = File.OpenRead(Server.MapPath("book.xml"));

        XDocumentdoc = XDocument.Load(reader);

        foreach(XElement element indoc.Root.Descendants("book"))

        {

            SqlConnectioncon = new SqlConnection(str);

            SqlCommandcmd = con.CreateCommand();

 

            con.Open();

            cmd.CommandText = "insert into book(title,author, gender,age,year,price) values(@title,@author,@gender,@age,@years,@price)";

            cmd.Parameters.AddWithValue("@title", element.Element("title").Value);

            cmd.Parameters.AddWithValue("@author", element.Element("author").Value);

            cmd.Parameters.AddWithValue("@gender", element.Element("author").Attribute("gender").Value);

            cmd.Parameters.AddWithValue("@age", element.Element("author").Attribute("age").Value);

            cmd.Parameters.AddWithValue("@years", element.Element("year").Value);

            cmd.Parameters.AddWithValue("@price", element.Element("price").Value);

            inti=cmd.ExecuteNonQuery();

            if(i > 0)

            {

                ClientScript.RegisterStartupScript(GetType(),"提示", "<script>alert('导入成功！');</script>");

            }

 

        }