using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Text;
using?System.Windows.Forms;
using?System.xml;

namespace?xmlDemo2
{
	public?partial?class?Form1?:?Form
	{
		xmlDocument?doc?=?new?xmlDocument（）;

		public?Form1（）
		{
			InitializeComponent（）;

			

			doc.Load（“省市區(qū).xml“）;


			xmlNode?provinces?=?doc.SelectSingleNode（“/ProvinceCity“）;
			foreach?（xmlNode?province?in?provinces.ChildNodes）?{
				cbxProvince.Items.Add（province.Name）;
			}
			cbxProvince.SelectedIndex?=?0;
		}

		private?void?cbxProvince_SelectedIndexChanged（object?sender?EventArgs?e）
		{
			cbxCity.Items.Clear（）;

			string?xpath?=?string.Format（“/ProvinceCity/{0}/City“?cbxProvince.SelectedItem.ToString（））;
			xmlNodeList?cities?=?doc.SelectNodes（xpath）;
			foreach?（xmlNode?city?in?cities）?{
				cbxCity.Items.Add（city.Attributes[“Name“].Value）;
			}

			if（cbxCity.Items.Count?>=?0）?{
				cbxCity.SelectedIndex?=?0;
			}
		}

		private?void?cbxCity_SelectedIndexChanged（object?sender?EventArgs?e）
		{
			cbxCityArea.Items.Clear（）;

			string?xpath?=?string.Format（“/ProvinceCity/{0}/City[@Name=‘{1}‘]/CityArea“?
					cbxProvince.SelectedItem.ToString（）
					cbxCity.SelectedItem.ToString（））;

			xmlNodeList?CityAreas?=?doc.SelectNodes（xpath）;
			foreach?（xmlNode?area?in?CityAreas）?{
				cbxCityArea.Items.Add（area.Attributes[“Name“].Value）;
			}

			if（cbxCityArea.Items.Count?>?0）?{
				cbxCityArea.SelectedIndex?=?0;
			}
		}
	}
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????9728??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\bin\Debug\xmlDemo2.exe

?????文件??????26112??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\bin\Debug\xmlDemo2.pdb

?????文件??????11608??2016-06-18?08:34??xmlDemo2\xmlDemo2\xmlDemo2\bin\Debug\xmlDemo2.vshost.exe

?????文件????????490??2010-03-17?22:39??xmlDemo2\xmlDemo2\xmlDemo2\bin\Debug\xmlDemo2.vshost.exe.manifest

?????文件?????116929??2013-06-09?14:46??xmlDemo2\xmlDemo2\xmlDemo2\bin\Debug\省市區(qū).xml

?????文件???????1576??2013-06-09?15:10??xmlDemo2\xmlDemo2\xmlDemo2\Form1.cs

?????文件???????2630??2013-06-09?15:10??xmlDemo2\xmlDemo2\xmlDemo2\Form1.Designer.cs

?????文件???????5817??2013-06-09?15:10??xmlDemo2\xmlDemo2\xmlDemo2\Form1.resx

?????文件???????1229??2016-05-27?09:09??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????5289??2016-06-18?08:33??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件???????3472??2013-06-09?15:10??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\ResGen.read.1.tlog

?????文件????????772??2013-06-09?15:10??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\ResGen.write.1.tlog

?????文件???????1281??2016-06-18?08:34??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\xmlDemo2.csproj.FileListAbsolute.txt

?????文件????????902??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\xmlDemo2.csproj.GenerateResource.Cache

?????文件???????9728??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\xmlDemo2.exe

?????文件????????180??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\xmlDemo2.Form1.resources

?????文件??????26112??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\xmlDemo2.pdb

?????文件????????180??2016-02-20?13:17??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\xmlDemo2.Properties.Resources.resources

?????文件????????391??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\Program.cs

?????文件???????1366??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\Properties\AssemblyInfo.cs

?????文件???????2513??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\Properties\Resources.Designer.cs

?????文件???????5612??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\Properties\Resources.resx

?????文件???????1015??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\Properties\Settings.Designer.cs

?????文件????????249??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\Properties\Settings.settings

?????文件???????3423??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\xmlDemo2.csproj

?????文件????????866??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2.sln

????..A..H.?????16384??2016-06-18?17:31??xmlDemo2\xmlDemo2\xmlDemo2.suo

?????目錄??????????0??2013-06-09?14:50??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug\TempPE

?????目錄??????????0??2016-05-27?09:09??xmlDemo2\xmlDemo2\xmlDemo2\obj\x86\Debug

?????目錄??????????0??2013-06-09?14:51??xmlDemo2\xmlDemo2\xmlDemo2\bin\Debug

............此處省略10個(gè)文件信息