此处的修改可以通过XML文件的形式来修改,最简单的方法: Dim ds As New DataSet() ds.ReadXml("d:\web.config") ds.Tables("add").Rows(0)("value") = 50 ds.AcceptChanges() ds.WriteXml("d:\web.config")
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);} #endregionprivate 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); } } }
Dim ds As New DataSet()
ds.ReadXml("d:\web.config")
ds.Tables("add").Rows(0)("value") = 50
ds.AcceptChanges()
ds.WriteXml("d:\web.config")
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);}
#endregionprivate 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);
}
}
}
doc.Load("Web.config");
XmlNode node = doc.DocumentElement.SelectSingleNode("appSettings");
node.SelectSingleNode("descendant::add[@key='Value_Inform']").Attributes[1].Value = "111";
doc.DocumentElement.SelectSingleNode("appSettings").InnerXml = node.InnerXml;
doc.Save("Web.config");