Web API with web services

Question

I made the follow codes to call a web service data output and it worked. The problem is when I activate the api key on the web software and this key is generated, to call the web service and need to make a api client to request this through an httpRequest, but my problem whenever I run it it says "The remote server returned an error: (404) Not Found." do you have any idea? I have my whole code pasted bellow.

Thanks you very much in advance

    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 DisplayDataInformation
{
    public partial class DisplayDataInformation : Form
    {
        public DisplayDataInformation()
        {
            InitializeComponent();
        }

        private void Submit(object sender, EventArgs e)
        {
            localhost.Dashboard proxy = new localhost.Dashboard();
            localhost.ProjectMetaData[] pm = proxy.GetAllProjectMetaData();
            const string URL = "http://localhost/myProgram/";
            const string apiKey = "d26b15b5-e336-48de-9142-939c0e639e8f";
            const string Id = "Id";
            const string Pass = "pass";


            System.Net.HttpWebRequest myHttpWReq;
            System.Net.HttpWebResponse myHttpWResp;

            //myHttpWReq.ContentLength = 0;

            // Make a web request to the web service
            myHttpWReq = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(BLUEURL + "http://localhost/myProgram/Dashboard.asmx" + Id + Pass + apiKey);
            myHttpWReq.Method = "Get";

            // Get the response of the web service
            myHttpWResp = (System.Net.HttpWebResponse)myHttpWReq.GetResponse();

            if (myHttpWResp.StatusCode == System.Net.HttpStatusCode.OK)
            {
                //Create an XML reader to parse the response
                System.Xml.XmlReader reader = System.Xml.XmlReader.Create(myHttpWResp.GetResponseStream());

            }

            //set an string output to the windows form
            StringBuilder sb = new StringBuilder();

            foreach (localhost.ProjectMetaData value in pm)
            {
                sb.AppendLine(value.ProjectTitle + "    -    "
                    + value.ProjectID + "    -    "
                    + value.PublishStatus );
               // sb.AppendLine("\r\n\t");
            }

            label1.Text = sb.ToString(); 

        }

    }
}

Answer 1

It looks like you are most like generating your request URL incorrectly. You have created your as such:

myHttpWReq = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(BLUEURL + "http://localhost/myProgram/Dashboard.asmx" + Id + Pass + apiKey);

The URL generated by this code will be:

 http://localhost/myProgram/Dashboard.asmxIdPassd26b15b5-e336-48de-9142-939c0e639e8f

(Note: I can't find the value of the variable BLUEURL in your code sample, but it will prefix the URL you are generating whatever it is. My best guess is that it is blank because you would be otherwise getting a UriFormatException.)

This does not look like the correct URL you are after, hence the 404 error. What you are probably after is:

myHttpWReq = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(String.Format("http://localhost/myProgram/Dashboard.asmx?id={0}&pass={1}&apiKey={2}", Id, Pass, apiKey));

This will send the request to the URL

http://localhost/myProgram/Dashboard.asmx

sending your parameters in the querystring.

However this is likely to still give you an error since you are trying to call an asmx web service which is an XML based web service and therefore your request is in the wrong format.

This tutorial will show you how to add the Dashboard.asmx web service as a Service reference to your project. This will auto-generate a proxy class which will wrap all calls to the web service for you into simple function calls.

Have read of these following answers for more help on how to add the reference:

• Web Reference vs. Service Reference
• How to add a Web reference Visual Studio 2012
• How to use a WSDL
• calling asmx from c# server side: endpoint element matching this contract could be found in the client element