用WCF服务来动态的获取本地XML省市区文档

建立一个WCF服务。

 using ClassLibrary;

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Runtime.Serialization;

 using System.ServiceModel;

 using System.ServiceModel.Web;

 using System.Text;

 using System.Xml;

 namespace AreaService

 {

     // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码、svc 和配置文件中的类名“Service1”。

     // 注意: 为了启动 WCF 测试客户端以测试此服务，请在解决方案资源管理器中选择 Service1.svc 或 Service1.svc.cs，然后开始调试。

     public class Service1 : IService1

     {

         public static class api

         {

             public static XmlDocument cacheAreaDocument { get; set; }

             public static XmlDocument cacheUrlMapDocument { get; set; }

         }

         public List<ClassLibrary.Area> GetProvince()

         {

             XmlDocument xd = api.cacheAreaDocument;

             if (xd == null)

             {

                 xd = new XmlDocument();

                 xd.Load(AppDomain.CurrentDomain.BaseDirectory + "/data/ChinaArea.xml");

             }

             XmlNode xn = xd.SelectSingleNode("area");

             List<Area> areas = new List<Area>();

             //等效于 XmlNode xn = xd.DocumentElement;

             foreach (XmlNode province in xn.ChildNodes)

             {

                 XmlElement proEl = (XmlElement)province;

                 areas.Add(new Area { province = proEl.GetAttribute("province"), provinceID = proEl.GetAttribute("provinceID") });

             }

             return areas;

         }

         public List<ClassLibrary.Area> GetCityByProvinceId(string provinceID)

         {

             XmlDocument xd = api.cacheAreaDocument;

             if (xd == null)

             {

                 xd = new XmlDocument();

                 xd.Load(AppDomain.CurrentDomain.BaseDirectory + "/data/ChinaArea.xml");

             }

             XmlNode xn = xd.SelectSingleNode("area");

             List<ClassLibrary.Area> areas = new List<ClassLibrary.Area>();

             foreach (XmlNode province in xn.ChildNodes)

             {

                 XmlElement pro = (XmlElement)province;

                 if (pro.GetAttribute("provinceID") == provinceID)

                 {

                     foreach (var cityNd in pro.ChildNodes)

                     {

                         XmlElement city = (XmlElement)cityNd;

                         areas.Add(new ClassLibrary.Area { City = city.GetAttribute("City"), CityID = city.GetAttribute("CityID") });

                     }

                 }

             }

             if (xn.ChildNodes == null || xn.ChildNodes.Count <= )

             {

                 areas.Add(new ClassLibrary.Area { City = "", CityID = "" });

             }

             return areas;

         }

         public List<ClassLibrary.Area> GetPieceareaByCityID(string CityID)

         {

             List<Area> areas = new List<Area>();

             if (CityID.Trim() == "")

             {

                 areas.Add(new Area { Piecearea = "", PieceareaID = "" });

                 return areas;

             }

             XmlDocument xd = api.cacheAreaDocument;

             if (xd == null)

             {

                 xd = new XmlDocument();

                 xd.Load(AppDomain.CurrentDomain.BaseDirectory + "/data/ChinaArea.xml");

             }

             XmlNode xn = xd.SelectSingleNode("area");

             //等效于 XmlNode xn = xd.DocumentElement;

             foreach (XmlNode province in xn.ChildNodes)

             {

                 foreach (XmlNode cityNd in province.ChildNodes)

                 {

                     if ((cityNd as XmlElement).GetAttribute("CityID") == CityID)

                     {

                         foreach (var pieceareaNd in cityNd.ChildNodes)

                         {

                             XmlElement piecearea = (XmlElement)pieceareaNd;

                             areas.Add(new Area { Piecearea = piecearea.GetAttribute("Piecearea"), PieceareaID = piecearea.GetAttribute("PieceareaID") });

                         }

                     }

                 }

             }

             return areas;

         }

     }

 }

建立后生成。然后在前端添加服务引用。

实例化。

 using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Windows.Forms;

 namespace 动态的获取省市

 {

     public partial class Form1 : Form

     {

         public Form1()

         {

             InitializeComponent();

             sa = new AreaService.Service1Client();

         }

         AreaService.Service1Client sa;

         private void Form1_Load(object sender, EventArgs e)

         {

             comboBox1.DataSource = sa.GetProvince();

             comboBox1.DisplayMember = "province";

             comboBox1.ValueMember = "provinceID";

             comboBox1_SelectedIndexChanged(sender,e);

             comboBox2_SelectedIndexChanged(sender, e);

             comboBox3_SelectedIndexChanged(sender, e);

         }

         /// <summary>

         /// 获取市

         /// </summary>

         /// <param name="sender"></param>

         /// <param name="e"></param>

         private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

         {

             comboBox2.DataSource = sa.GetCityByProvinceId(comboBox1.SelectedValue+"");

             comboBox2.DisplayMember = "City";

             comboBox2.ValueMember = "CityID";

         }

         private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)

         {

             comboBox3.DataSource = sa.GetPieceareaByCityID(comboBox2.SelectedValue+"");

             comboBox3.DisplayMember = "Piecearea";

             comboBox3.ValueMember = "PieceareaID";

         }

         private void comboBox3_SelectedIndexChanged(object sender, EventArgs e)

         {

         }

         private void button1_Click(object sender, EventArgs e)

         {

         }

     }

 }

这是窗体设计代码：

namespace 动态的获取省市

{

    partial class Form1

    {

        /// <summary>

        /// 必需的设计器变量。

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// 清理所有正在使用的资源。

        /// </summary>

        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (components != null))

            {

                components.Dispose();

            }

            base.Dispose(disposing);

        }

        #region Windows 窗体设计器生成的代码

        /// <summary>

        /// 设计器支持所需的方法 - 不要

        /// 使用代码编辑器修改此方法的内容。

        /// </summary>

        private void InitializeComponent()

        {

            this.label1 = new System.Windows.Forms.Label();

            this.label2 = new System.Windows.Forms.Label();

            this.label3 = new System.Windows.Forms.Label();

            this.comboBox1 = new System.Windows.Forms.ComboBox();

            this.comboBox2 = new System.Windows.Forms.ComboBox();

            this.comboBox3 = new System.Windows.Forms.ComboBox();

            this.button1 = new System.Windows.Forms.Button();

            this.SuspendLayout();

            //

            // label1

            //

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(40, 50);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(29, 12);

            this.label1.TabIndex = 0;

            this.label1.Text = "省：";

            //

            // label2

            //

            this.label2.AutoSize = true;

            this.label2.Location = new System.Drawing.Point(40, 111);

            this.label2.Name = "label2";

            this.label2.Size = new System.Drawing.Size(29, 12);

            this.label2.TabIndex = 1;

            this.label2.Text = "市：";

            //

            // label3

            //

            this.label3.AutoSize = true;

            this.label3.Location = new System.Drawing.Point(40, 175);

            this.label3.Name = "label3";

            this.label3.Size = new System.Drawing.Size(29, 12);

            this.label3.TabIndex = 2;

            this.label3.Text = "区：";

            //

            // comboBox1

            //

            this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;

            this.comboBox1.FormattingEnabled = true;

            this.comboBox1.Location = new System.Drawing.Point(87, 47);

            this.comboBox1.Name = "comboBox1";

            this.comboBox1.Size = new System.Drawing.Size(121, 20);

            this.comboBox1.TabIndex = 3;

            this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);

            //

            // comboBox2

            //

            this.comboBox2.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;

            this.comboBox2.FormattingEnabled = true;

            this.comboBox2.Location = new System.Drawing.Point(87, 108);

            this.comboBox2.Name = "comboBox2";

            this.comboBox2.Size = new System.Drawing.Size(121, 20);

            this.comboBox2.TabIndex = 4;

            this.comboBox2.SelectedIndexChanged += new System.EventHandler(this.comboBox2_SelectedIndexChanged);

            //

            // comboBox3

            //

            this.comboBox3.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;

            this.comboBox3.FormattingEnabled = true;

            this.comboBox3.Location = new System.Drawing.Point(87, 172);

            this.comboBox3.Name = "comboBox3";

            this.comboBox3.Size = new System.Drawing.Size(121, 20);

            this.comboBox3.TabIndex = 5;

            this.comboBox3.SelectedIndexChanged += new System.EventHandler(this.comboBox3_SelectedIndexChanged);

            //

            // button1

            //

            this.button1.Location = new System.Drawing.Point(87, 226);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(75, 23);

            this.button1.TabIndex = 6;

            this.button1.Text = "确  定";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            //

            // Form1

            //

            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(261, 272);

            this.Controls.Add(this.button1);

            this.Controls.Add(this.comboBox3);

            this.Controls.Add(this.comboBox2);

            this.Controls.Add(this.comboBox1);

            this.Controls.Add(this.label3);

            this.Controls.Add(this.label2);

            this.Controls.Add(this.label1);

            this.Name = "Form1";

            this.Text = "Form1";

            this.Load += new System.EventHandler(this.Form1_Load);

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.Label label2;

        private System.Windows.Forms.Label label3;

        private System.Windows.Forms.ComboBox comboBox1;

        private System.Windows.Forms.ComboBox comboBox2;

        private System.Windows.Forms.ComboBox comboBox3;

        private System.Windows.Forms.Button button1;

    }

}

效果如下：

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用WCF服务来动态的获取本地XML省市区文档

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