ASP。NET程序中动态更改web.config中的设置项目

发布时间：2023-08-01 15:16:28 所属栏目：Asp教程来源：

导读：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;

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>

/// 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);

}

}

}

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