Net Operation XML class

<? XML version = "1.0"?>
<Userlogin>
<User>
<Usercode> 001 </usercode>
<Username> operator 1 </username>
<Userpwd> 111 </userpwd>
</User>
<User>
<Usercode> 002 </usercode>
<Username> operator 2 </username>
<Userpwd> 222 </userpwd>
</User>
</Userlogin>

 

 

 

Class:

Using system;
Using system. Data;
Using system. configuration;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;
Using system. xml;

/** // <Summary>
/// Read/write class for XML files
/// </Summary>
///
Public class xmlrw
{
Public xmlrw ()
{
//
// Todo: add the constructor logic here
//
}

// Writexml completes adding the user
// The location where the current XML file is stored in Filename
// Usercode: encode the user to be added
// Username: name of the user to be added
// Userpassword

Public void writexml (string filename, string usercode, string username, string userpassword)
{

// Initialize the XML document operation class
Xmldocument mydoc = new xmldocument ();
// Load the XML file
Mydoc. Load (filename );

// Add the element -- usercode
Xmlelement ele = mydoc. createelement ("usercode ");
Xmltext text = mydoc. createtextnode (usercode );

// Add the element -- username
Xmlelement ele1 = mydoc. createelement ("username ");
Xmltext text1 = mydoc. createtextnode (username );

// Add the element -- userpwd
Xmlelement ele2 = mydoc. createelement ("userpwd ");
Xmltext text2 = mydoc. createtextnode (userpassword );

// Add the node user to correspond to the node name in our XML file
Xmlnode newelem = mydoc. createnode ("element", "user ","");

// Add an element to a node
Newelem. appendchild (Ele );
Newelem. lastchild. appendchild (text );
Newelem. appendchild (ele1 );
Newelem. lastchild. appendchild (text1 );
Newelem. appendchild (ele2 );
Newelem. lastchild. appendchild (text2 );

// Add the node to the document
Xmlelement root = mydoc. documentelement;
Root. appendchild (newelem );

// Save
Mydoc. Save (filename );

}

// Deletenode completes adding a user
// The location where the current XML file is stored in Filename
// Usercode: encode the user to be added

Public void deletenode (string filename, string usercode)
{
// Initialize the XML document operation class
Xmldocument mydoc = new xmldocument ();
// Load the XML file
Mydoc. Load (filename );

// Search for a specified column, which is generally a primary key column
Xmlnodelist mynode = mydoc. selectnodes ("// usercode ");

// Determine whether this node exists

If (! (Mynode = NULL ))
{
// Traverse the node and find the qualified elements

Foreach (xmlnode Xn in mynode)
{
If (Xn. innerxml = usercode)
// Delete the parent node of an element
XN. parentnode. parentnode. removechild (Xn. parentnode );
}
}

// Save
Mydoc. Save (filename );

}

// Writexml completes password modification for the user
// The location where the current XML file is stored in Filename
// User code
// Userpassword

Public void updatexml (string filename, string usercode, string userpassword)
{

// Initialize the XML document operation class
Xmldocument mydoc = new xmldocument ();
// Load the XML file
Mydoc. Load (filename );

// Search for a specified Node
System. xml. xmlnodelist nodes = mydoc. selectnodes ("// user ");

If (nodes! = NULL)
{
Foreach (system. xml. xmlnode Xn in nodes)
{
If (Xn. selectsinglenode ("usercode"). innertext = usercode)
{
XN. selectsinglenode ("userpwd"). innertext = userpassword;
}

}
}

Mydoc. Save (filename );

}

}

Usage:

Protected void button#click (Object sender, eventargs E)
{

// Add reference and create instance
Xmlrw myxml = new xmlrw ();
// Call the method we have defined to specify parameters.
Myxml. writexml (server. mappath ("ytconfig. xml"), textbox1.text, textbox2.text, textbox3.text );

Response. Write ("Save OK! ");

}
Protected void button2_click (Object sender, eventargs E)
{
Xmlrw myxml = new xmlrw ();
Myxml. deletenode (server. mappath ("ytconfig. xml"), textbox1.text );

Response. Write ("delete OK! ");

}
Protected void button3_click (Object sender, eventargs E)
{
Xmlrw myxml = new xmlrw ();
Myxml. updatexml (server. mappath ("ytconfig. xml"), textbox1.text, textbox3.text );

Response. Write ("update OK! ");

}

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/fishpowersoft/archive/2007/12/21/1957113.aspx