第一种方法
1.添加引用：http://www.webxml.com.cn/WebServices/WeatherWebService.asmx
2.cs代码：
View Code
WeatherWebServiceSoap w = new WeatherWebServiceSoapClient("WeatherWebServiceSoap"); protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { BindPro(); BindCity(); } } //province protected void BindPro() { string[] pro = w.getSupportProvince(); for (int i = 0; i < pro.Length; i++) { ddlProv.Items.Add(new ListItem(pro[i],pro[i])); } } //city protected void BindCity() { ddlCity.Items.Clear(); string[] city = w.getSupportCity(ddlProv.SelectedValue); for (int i = 0; i < city.Length; i++) { ddlCity.Items.Add(new ListItem(city[i],city[i])); } } //weather protected void BindWeather() { string city = ddlCity.SelectedValue.ToString().Substring(0,2); //Response.Write(city); string[] mystr = w.getWeatherbyCityName(city); //for (int i = 0; i < mystr.Length; i++) //{ // Response.Write(mystr[8]+"<br/>"); //img.ImageUrl = "images/a_" + mystr[8]; //} //mystr[0] 省 //mystr[2] 城市后的代码 labCity.Text = mystr[1];//城市 Label2.Text = mystr[6];//日期+天气情况（如：7月4日 多云） Label3.Text = mystr[5];//温度（如：28℃/34℃） Label4.Text = mystr[4];//时间（如：2012-7-4 12:04:38） } protected void ddlProv_SelectedIndexChanged(object sender, EventArgs e) { BindCity(); } protected void Button1_Click(object sender, EventArgs e) { BindWeather(); } html代码： <body> <form id="form1" runat="server"> <div> <asp:DropDownList ID="ddlProv" runat="server" AutoPostBack="True" onselectedindexchanged="ddlProv_SelectedIndexChanged"></asp:DropDownList> <asp:DropDownList ID="ddlCity" runat="server"></asp:DropDownList> <asp:Label ID="labCity" runat="server" Text="Label"></asp:Label> <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label> <asp:Label ID="Label3" runat="server" Text="Label"></asp:Label> <asp:Label ID="Label4" runat="server" Text="Label"></asp:Label> <br /> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="获 取" /> </div> </form> </body>
第二种方法
1.添加引用：http://www.webxml.com.cn/WebServices/WeatherWebService.asmx
2.cs代码：
//获取天气
Weather.WeatherWebServiceSoapClient w = new Weather.WeatherWebServiceSoapClient("WeatherWebServiceSoap");
//把webservice当做一个类来操作
string[] s = new string[23];
//声明string数组存放返回结果
string city = "北京";
//获得查询城市
s = w.getWeatherbyCityName(city);
//以文本框内容为变量实现方法getWeatherbyCityName
if (s[8] == "")
{
// MessageBox.Show("暂时不支持您查询的城市");
} else
{
//pictureBox1.Image = Image.FromFile(@"d:\image\" + s[8] + "");
string st1 =s[1]+" "+s[6];
string str2 = s[10];
}