所属类别：.NET

文章作者：佚名

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朋友们可以自行测试，我这里都没有问题了，鳖了一上午的问题总算解决了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 description for WebForm1./// 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";XmlDocumentxmldoc= 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/// /// Required method for Designer support - do not modify/// the contents of this method with the code editor./// 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";XmlDocumentxmldoc= 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);}}} 关闭本页

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