C#用天气预报的WebServices

后台代码: 

protected void Page_Load(object sender, EventArgs e)
   {
       if (!IsPostBack)
       {
           WeatherWS ws = new WeatherWS();
           IList<string> provinceDataSource = new List<string>();

           DataSet proDs = ws.getRegionDataset();
           ddlProvince.DataSource = proDs.Tables[0].DefaultView;
           ddlProvince.DataTextField = "RegionName";
           ddlProvince.DataValueField = "RegionID";
           ddlProvince.DataBind();
       }
   }

   protected void Button1_Click(object sender, EventArgs e)
   {

       WeatherWS ws = new WeatherWS();
       string [] wsInfo = ws.getWeather(ddlCity.SelectedValue,"");
       string result = string.Empty;
       for (int i = 0; i < wsInfo.Length; i++)
       {
           result += wsInfo[i]+"<BR/>";
       }
       Label1.Text = result;

   }

   protected void ddlProvince_SelectedIndexChanged(object sender, EventArgs e)
   {
       WeatherWS ws = new WeatherWS();
       DataSet cityDs = ws.getSupportCityDataset(ddlProvince.SelectedValue);
       ddlCity.DataSource = cityDs.Tables[0].DefaultView;
       ddlCity.DataTextField = "CityName";
       ddlCity.DataValueField = "CityID";
       ddlCity.DataBind();
   }

 .aspx代码 

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <asp:DropDownList ID="ddlProvince" runat="server" AutoPostBack="True"
                        onselectedindexchanged="ddlProvince_SelectedIndexChanged">
                    </asp:DropDownList>
                    <asp:DropDownList ID="ddlCity" runat="server">
                    </asp:DropDownList>
                    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
                    <br />
                    <br />
                    <br />
                    <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
                </ContentTemplate>
            </asp:UpdatePanel>

 访问速度很慢,,,... 

第一步要添加Web引用

 

然后页面就有东西了.....webServices给的很明确了