XML保存数据

//添加节点

XmlDocument doc1 = new XmlDocument();

doc1.LoadXml(" <所有图书>" + " <图书>" + " <书名>ASP.NET程序开发范例宝典 </书名>" + " </图书>" + " </所有图书>");

XmlDocument doc2 = new XmlDocument();

doc2.Load(Server.MapPath("book.xml"));

XmlNode newNode = doc1.ImportNode(doc2.DocumentElement.LastChild,true);

doc1.DocumentElement.AppendChild(newNode);

doc1.Save(Server.MapPath("insert.xml"));

Xml1.Document = doc1;

//xml修改

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

DataSet mydsRead = new DataSet();

mydsRead.ReadXml(Server.MapPath("Test.xml"));

GridView1.DataSource = mydsRead;

GridView1.DataBind();

DropDownList1.DataSource = mydsRead;

DropDownList1.DataTextField = "EName";

DropDownList1.DataBind();

}

}

protected void Button1_Click(object sender, EventArgs e)

{

XmlDocument doc = new XmlDocument();

doc.Load(Server.MapPath("Test.xml"));

XmlNodeList xnl = doc.SelectSingleNode("NewDataSet").ChildNodes; ;//获取NewDataSet节点的所有子节点

foreach (XmlNode xn in xnl)//遍历所有子节点

{

XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型

if (xe.Name == "Table")//判断节点名为Table

{

XmlNodeList xnlChild = xe.ChildNodes;//继续获取xe子节点的所有子节点

foreach (XmlNode xnChild in xnlChild)//遍历

{

XmlElement xeChild = (XmlElement)xnChild;//转换类型

if (xeChild.Name == "EName" && xeChild.InnerText == this.DropDownList1.SelectedValue.Trim())

{

xeChild.InnerText = TextBox1.Text.Trim();

Response.Write(" <script>alert('修改成功') </script>");

}

}

}

}

doc.Save(Server.MapPath("Test.xml"));

Response.Write(" <script>location='Default.aspx' </script>");

}

//检索xml节点

protected void Page_Load(object sender, EventArgs e)

{

string strCon="Data Source=(local);Database=db_15;Uid=sa;Pwd=";

SqlConnection sqlcon = new SqlConnection(strCon);

string sqlstr = "select * from tb_Employee";

SqlDataAdapter myda = new SqlDataAdapter(sqlstr,sqlcon);

DataSet myds = new DataSet();

sqlcon.Open();

myda.Fill(myds);

sqlcon.Close();

myds.WriteXml(Server.MapPath("test.xml"));

}

protected void Button1_Click(object sender, EventArgs e)

{

XmlDocument doc = new XmlDocument();

doc.Load(Server.MapPath("test.xml"));

XmlNodeList nodes;

XmlElement root = doc.DocumentElement;

nodes = root.SelectNodes("descendant::Table[EName='" + TextBox1.Text.Trim() + "']");

foreach (XmlNode node in nodes)

{

if (Label1.Text == "")

{

for (int i = 0; i <= node.ChildNodes.Count - 1; i++)

{

Label1.Text = Label1.Text + node.ChildNodes[i].InnerText + " <br>";

}

}

else

{

Label1.Text = "";

for (int i = 0; i <= node.ChildNodes.Count - 1; i++)

{

Label1.Text = Label1.Text + node.ChildNodes[i].InnerText + " <br>";

}

}

}

}

//删除xml节点

if (TextBox1.Text.Trim() != "")

{

Label1.Visible = true;

XmlDocument doc = new XmlDocument();

doc.Load(Server.MapPath("test.xml"));

XmlNodeList nodes;

XmlElement root = doc.DocumentElement;

nodes = root.SelectNodes("descendant::Table[EName='" + TextBox1.Text.Trim() + "']");

foreach (XmlNode node in nodes)

{

root.RemoveChild(node);

}

doc.Save(Server.MapPath("test.xml"));

Xml2.Document = doc;

}

else

Response.Write(" <script>alert('请输入要删除的节点');location='javascript:history.go(-1)';