ASP.NET Web服务

Question

I may be going at this from the wrong direction. I'm fairly new to .net web services and was looking for a little help.

I have a geolocation webservice I got online and I wanted to bind the results to a listbox or a dataview but am unable too.

I've created a web proxy called net.webservicex.www that points to the webservice at.. http://www.webservicex.net/geoipservice.asmx

Here's my c# code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace web_services
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            net.webservicex.www.GeoIPService myProxy = new net.webservicex.www.GeoIPService(); // proxy object
            string ipAddress, result;

            ipAddress = txtIpAddress.Text;

            result = myProxy.GetGeoIP("64.106.166.130");
            lstResults.DataSource = result;
            lstResults.DataMember = "IP";

        }
    }
}

The error I'm recieving is Error

Cannot implicitly convert type 'web_services.net.webservicex.www.GeoIP' to 'string' at line 24

If someone could give me some tips or idea's that would be great.

Thanks! Paul

Answer 1

You don't need to put it in the result string

 
 
 
  
  lstResults.DataSource = myProxy.GetGeoIP("64.106.166.130");
 
  

Since the object returned by your webservice is not enumerable, You could trick it by putting it into an a enumerable Type:

List<web_services.net.webservicex.www.GeoIP> resultList = new List<web_services.net.webservicex.www.GeoIP>();
resultList.Add(myProxy.GetGeoIP("64.106.166.130"));
lstResults.DataSource = resultList;

Answer 2

Looking at the wsdl for this web service it seems that the call to the GetGeoIP method returns an object, not a string.

This is why the compiler is complaining. You could either change the type of result to the object it is expecting or use the var keyword.

Answer 3

This line is at fault:

result = myProxy.GetGeoIP("64.106.166.130");

The object returned by that method is not a string, it's a web_services.net.webservicex.www.GeoIP .

You've declared result as a string, which doesn't match. Perhaps there is a ToString() method on the GeoIP class. If so, you could change your code to:

string ipAddress;
web_services.net.webservicex.www.GeoIP result;
// or maybe: object result;

ipAddress = txtIpAddress.Text;

result = myProxy.GetGeoIP("64.106.166.130");

And depending on what result looks like, you might just be able to make it your data source.

Answer 4

I'm a very beginner with the C# and .net but here's how I solved this and I'm sure it'll help beginners like me:

The result object looks like this:

<GeoIP><ReturnCode>1</ReturnCode><IP>11.22.33.44</IP><ReturnCodeDetails>Success</ReturnCodeDetails><CountryName>Germany</CountryName><CountryCode>GER</CountryCode></GeoIP>

So obviously (yeah right...after spitting blood on this...lol), the result cannot be a simple STRING type. So, taking samples from the above solutions I've made it like that:

Default.aspx.cs:

        mygeoip.GeoIPService getIP = new mygeoip.GeoIPService();
        string myIP = IPTextBox.Text;
        GeoIPService.mygeoip.GeoIP resultList = new GeoIPService.mygeoip.GeoIP();

        resultList = getIP.GetGeoIP(myIP);
        sCountry.Text = resultList.CountryName;
        sCountryCode.Text = resultList.CountryCode;
        sIP.Text = resultList.IP;            

Where - " mygeoip " is my WebService name (instead of "net.webservicex.www") and GeoIPService is my namespace.

Default.aspx:

        <asp:TextBox ID="IPTextBox" runat="server"></asp:TextBox>&nbsp;<asp:Button 
        ID="GetWhois" runat="server" Text="Get Whois" onclick="GetWhois_Click" />
<p><asp:Label ID="sCountry" runat="server" Text="Country: "></asp:Label></p>
<p><asp:Label ID="sCountryCode" runat="server" Text="Country: "></asp:Label></p>
<p><asp:Label ID="sIP" runat="server" Text="Country: "></asp:Label></p>

That's it - I hope I've helped beginners like me :)

Answer 5

    GeoIP result;

    ipAddress = "196.36.153.129";

    result = myProxy.GetGeoIP("64.106.166.130");

Answer 6

 [WebMethod] public double ProcitajKursNaDan(DateTime datum, string valuta) { List<string> podaci = GetLines("valute.txt"); double kurs = 0.0; for (int i = 0; i < podaci.Count; i++) { string[] linija = podaci[i].Split('|'); string dat = linija[0]; string val = linija[1]; string vrednost = linija[2]; dat = dat.Trim(); val = val.Trim(); vrednost = vrednost.Trim(); DateTime datIzFajla = DateTime.ParseExact(dat, "d/M/yyyy", null); double kursIzFajla = Convert.ToDouble(vrednost); if (DateTime.Compare(datIzFajla, datum) == 0 && val == valuta) kurs = kursIzFajla; } return kurs; } [WebMethod] public bool UpisiKursNaDan(DateTime datum, string valuta, double Kurs) { string date = datum.ToString("d/M/yyyy"); string linijaZaUpis = date + " | " + valuta + " | " + Kurs.ToString(); bool success = false; try { StreamWriter sw = new StreamWriter(Server.MapPath("podaci/valute.txt"), true); sw.WriteLine(linijaZaUpis); sw.Close(); success = true; } catch { success = false; } return success; } [WebMethod] public List<string> ProcitajSveValute() { List<string> linije = GetLines("valute.txt"); List<string> ValuteIzFajla = new List<string>(); for (int i = 0; i < linije.Count; i++) { string linija = linije[i]; string valuta = linija.Split('|')[1]; valuta = valuta.Trim(); ValuteIzFajla.Add(valuta); } List<string> ValuteKraj = ValuteIzFajla.Distinct().ToList(); return ValuteKraj; // try // { // if (!IsPostBack) // { // Service1 servis = new Service1(); // List<string> lista = servis.ProcitajSveValute().ToList<string>(); // for (int i = 0; i < lista.Count(); i++) // { // DropDownList1.Items.Add(lista[i]); // } // } // } // catch (Exception ex) // { // Response.Write(ex.Message); // } // } // protected void Button1_Click(object sender, EventArgs e) // { // try // { // Service1 servis = new Service1(); // DateTime datum = Calendar1.SelectedDate; // string valuta = DropDownList1.SelectedItem.ToString(); // double kurs = Convert.ToDouble(TextBox1.Text); // bool nesto = servis.UpisiKursNaDan(datum, valuta, kurs); // } // catch (Exception ex) // { // Response.Write(ex.Message); // } // TextBox1.Text = " "; } } } // try // { // if (!IsPostBack) // { // Service1 servis = new Service1(); // List<string> lista = servis.ProcitajSveValute().ToList<string>(); // for (int i = 0; i < lista.Count(); i++) // { // DropDownList1.Items.Add(lista[i]); // } // } // } // catch (Exception ex) // { // Response.Write(ex.Message); // } //} //protected void Button1_Click(object sender, EventArgs e) //{ // try // { // Service1 servis = new Service1(); // DateTime datum = Calendar1.SelectedDate; // string valuta = DropDownList1.SelectedItem.ToString(); // double kurs = servis.ProcitajKursNaDan(datum, valuta); // Label1.Text = kurs.ToString(); // if (kurs == 0) // { // Label1.Text = "Ne postoji kursna lista za tu valutu na taj datum!"; // } // } // catch (Exception ex) // { // Response.Write(ex.Message); // } //}