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>");

}

}