using System;
using System.Collections;
using
System.ComponentModel;
using System.Data;
using System.Drawing;
using
System.Web;
using System.Web.SessionState;
using System.Web.UI;
using
System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using
System.Xml ;
namespace WebApplication1
{
/// <summary>
/// Summary
description for WebForm1.
/// </summary>
public class WebForm1 :
System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox
TextBox1;
protected System.Web.UI.WebControls.DropDownList
DropDownList1;
protected System.Web.UI.WebControls.Button Button1;
public WebForm1()
{
Page.Init += new
System.EventHandler(Page_Init);
}
private void Page_Load(object sender, System.EventArgs
e)
{
if(!Page.IsPostBack)
{
//打开某文件(假设WEB。CONFIG在根目录中)
string
filename=Server.MapPath("/") + @"/web.config";
XmlDocument xmldoc= new
XmlDocument();
xmldoc.Load(filename);
XmlNodeList topM=xmldoc.DocumentElement.ChildNodes;
foreach(XmlElement
element in
topM)
{
if(element.Name.ToLower()=="appsettings")
{
XmlNodeList
_node=element.ChildNodes;
if ( _node.Count >0
)
{
DropDownList1.Items.Clear();
foreach(XmlElement el in
_node)
{
DropDownList1.Items.Add(el.Attributes["key"].InnerXml);
}
}
}
}
}
}
private void Page_Init(object sender, EventArgs
e)
{
InitializeComponent();
}
#region Web Form Designer generated code
/// <summary>
///
Required method for Designer support - do not modify
/// the contents of this
method with the code editor.
/// </summary>
private void
InitializeComponent()
{
this.Button1.Click += new
System.EventHandler(this.Button1_Click);
this.Load += new
System.EventHandler(this.Page_Load);
}
#endregion
private void Button1_Click(object sender, System.EventArgs e)
{
string
filename=Server.MapPath("/") + @"/web.config";
XmlDocument xmldoc= new
XmlDocument();
xmldoc.Load(filename);
XmlNodeList topM=xmldoc.DocumentElement.ChildNodes;
foreach(XmlElement
element in
topM)
{
if(element.Name.ToLower()=="appsettings")
{
XmlNodeList
_node=element.ChildNodes;
if ( _node.Count >0
)
{
foreach(XmlElement el in
_node)
{
if(el.Attributes["key"].InnerXml.ToLower()==this.DropDownList1.SelectedItem.Value.ToLower())
{
el.Attributes["value"].Value=this.TextBox1.Text;
}
}
}
}
}
xmldoc.Save(filename);
}
}
}