WPF实例：通过WebServices获取城市的天气情况

1 远程WebServices：http://www.ayandy.com/Service.asmx 一般情况可以，有时会出现不能连接

2 创建WPF项目WpfWeather，并且添加WebServices引用到项目中Service1，app.config文件内容

有时候自动生成的会有另外一个binding 和endpoint ，导致出现错误，删除就好了

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="ServiceSoap" closeTimeout="00:01:00" openTimeout="00:01:00"
                    receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"
                    bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
                    maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                    messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
                    useDefaultWebProxy="true">
                    <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                    <security mode="None">
                        <transport clientCredentialType="None" proxyCredentialType="None"
                            realm="" />
                        <message clientCredentialType="UserName" algorithmSuite="Default" />
                    </security>
                </binding>
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="http://www.ayandy.com/Service.asmx" binding="basicHttpBinding"
                bindingConfiguration="ServiceSoap" contract="Service1.ServiceSoap"
                name="ServiceSoap" />
        </client>
    </system.serviceModel>
</configuration>

3 设计xaml文件界面：

<Window x:Class="WpfWeather.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300" Loaded="Window_Loaded">
    <Window.Resources>
        <DataTemplate x:Key="ComboBoxTemplate">
            <Label Content="{Binding Path=Name}"></Label>
        </DataTemplate>
    </Window.Resources>
    <Grid>
        <Canvas Margin="18,16,16,19" Name="canvas1">
            <ComboBox Canvas.Left="0" Canvas.Top="11" Height="34" Width="138" ItemsSource="{Binding}"  Name="cbcity" SelectionChanged="cbcity_SelectionChanged">
                <ComboBox.ItemTemplate>
                    <StaticResource  ResourceKey="ComboBoxTemplate"></StaticResource>
                </ComboBox.ItemTemplate>
            </ComboBox>
            <TextBlock Canvas.Left="8" Canvas.Top="55" Height="161" Name="tbDetail" Width="228" TextWrapping="Wrap"/>
            <ComboBox Canvas.Left="153" Canvas.Top="11" Height="34" Name="cbdate" Width="91" SelectionChanged="cbdate_SelectionChanged">
                <ComboBoxItem>Today</ComboBoxItem>
                <ComboBoxItem>Tomorrow</ComboBoxItem>
                <ComboBoxItem>AfterTomorrow</ComboBoxItem>
            </ComboBox>
        </Canvas>
    </Grid>
</Window>

4 后台代码，从WebServices取值和给页面赋值：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using WpfWeather.Service1;
using System.Data;
using System.IO;

namespace WpfWeather
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            try
            {
                if (File.Exists(AppDomain.CurrentDomain.BaseDirectory + "/city.xml"))
                {
                    DataSet dsCity = new DataSet();
                    dsCity.ReadXml(AppDomain.CurrentDomain.BaseDirectory + "/city.xml");
                    cbcity.DataContext = dsCity.Tables[0];
                }
                else
                {
                    ServiceSoapClient ssc = new ServiceSoapClient();
                    string[] citys = ssc.getSupportCity("all");

                    DataTable dt = new DataTable();
                    DataColumn dc = new DataColumn("ID", typeof(System.String));
                    dt.Columns.Add(dc);
                    dc = new DataColumn("Name", typeof(System.String));
                    dt.Columns.Add(dc);
                    for (int i = 0; i < citys.Length; i++)
                    {
                        dt.Rows.Add(new object[] { i, citys[i] });
                    }
                    DataSet ds = new DataSet();
                    ds.Tables.Add(dt);
                    ds.WriteXml(AppDomain.CurrentDomain.BaseDirectory + "/city.xml");
                    cbcity.DataContext = dt;
                }
            }
            catch (Exception ex)
            {
                tbDetail.Inlines.Clear();
                tbDetail.Inlines.Add(new Run(ex.ToString()));
            }

        }

        private void cbcity_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            tbDetail.Inlines.Clear();
            GetDetail();
        }

        private void GetDetail()
        {
            try
            {
                string city = ((DataRowView)cbcity.SelectedItem).Row.ItemArray[1].ToString();
                ServiceSoapClient ssc = new ServiceSoapClient();
                string[] weather = new string[8];
                if (cbdate.SelectedIndex != -1)
                {
                    string DayFlag = ((ComboBoxItem)cbdate.SelectedItem).Content.ToString();
                    switch (DayFlag)
                    {
                        case "Today":
                            weather = ssc.getWeatherbyCityName(city, theDayFlagEnum.Today);
                            break;
                        case "Tomorrow":
                            weather = ssc.getWeatherbyCityName(city, theDayFlagEnum.Tomorrow);
                            break;
                        case "AfterTomorrow":
                            weather = ssc.getWeatherbyCityName(city, theDayFlagEnum.theDayafterTomorrow);
                            break;
                    }
                }
                else
                {
                    weather = ssc.getWeatherbyCityName(city, theDayFlagEnum.Today);
                }
                for (int i = 0; i < weather.Length; i++)
                {
                    tbDetail.Inlines.Add(new Run(weather[i]));
                    if (i != weather.Length - 1)
                    {
                        tbDetail.Inlines.Add(new LineBreak());
                    }
                }

            }
            catch (Exception ex)
            {
                tbDetail.Inlines.Add(new Run(ex.ToString()));
            }
        }

        private void cbdate_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            tbDetail.Inlines.Clear();
            if (cbcity.SelectedIndex != -1)
            {
                GetDetail(); 
            }
            else
            {
                return;
            }
        }
    }
}