How to consume an array of structs returned by a web service?

Question

User508577675 posted

A sample web service app I have been practicing with has two web methods:
1) HelloWorld -- which I can read the data from no problem - just a string 
2) ClientData[] -- which returns an array of struct objects -- this is where I have the question.

Here is my instantiation of the webservice in my winform app for reading from HelloWorld

myWebSvc1.WebService1 s1 = new myWebSvc1.WebService1();
string y = s1.HelloWorld(); //--no problems so far here
Console.WriteLine(y);
//--but when I add the call to GetClientData() I have a problem
List<ClientData> ls = new List<ClientData>(s1.GetClientData(3)); //--problem here

----------------------------------------------------------

public struct ClientData
{
  public String Name;
  public int ID;
}

[WebMethod(CacheDuration = 30,
    Description="Returns an array of Clients.")]
public ClientData[] GetClientData(int Number)
{
  ClientData [] Clients = null;

  if (Number > 0 && Number <= 10)
  {
    Clients = new ClientData[Number];
    for (int i = 0; i < Number; i++)
    {
      Clients[i].Name = "Client " + i.ToString();
      Clients[i].ID = i;
    }
  }
  return Clients;
}

If I browse the .asmx file -- the sample xml returns the following if I enter 3 for GetClientData function param

  <?xml version="1.0" encoding="utf-8" ?>
- <ArrayOfClientData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://codeproject.com/webservices/">
- <ClientData>
  <Name>Client 0</Name>
  <ID>0</ID>
  </ClientData>
- <ClientData>
  <Name>Client 1</Name>
  <ID>1</ID>
  </ClientData>
- <ClientData>
  <Name>Client 2</Name>
  <ID>2</ID>
  </ClientData>
  </ArrayOfClientData>

From my winform app I get the following error messages when trying to add the GetClientData function call above --

Error 1 The best overloaded method match for 'System.Collections.Generic.List<DSS_2008.Form7.ClientData[]>.List(System.Collections.Generic.IEnumerable<DSS_2008.Form7.ClientData[]>)' has some invalid arguments 

Error 2 Argument '1': cannot convert from 'DSS_2008.myWebSvc1.ClientData[]' to 'System.Collections.Generic.IEnumerable<DSS_2008.Form7.ClientData[]>' 

 

Error1 The best overloaded method match for 'System.Collections.Generic.List<DSS_2008.Form7.ClientData[]>.List(int)' has some invalid arguments

Error 2 Argument '1': cannot convert from 'DSS_2008.myWebSvc1.ClientData[]' to 'int'

How can I fix this so that I can read the result into my winform app?

Thanks

------------------------------------------------

//--sample web service

namespace MyService
{
  using System;
  using System.Collections;
  using System.Data;
  using System.Web;
  using System.Web.Services;

  public struct ClientData
  {
    public String Name;
    public int ID;
  }
  /// <summary>
  ///    Summary description for WebService1.
  /// </summary>
  [WebService(Namespace="http://codeproject.com/webservices/",
     Description="This is a demonstration WebService.")]
  public class WebService1 : System.Web.Services.WebService
  {
    //--source of sample:  http://www.codeproject.com/KB/webservices/myservice.aspx
    private const int CacheHelloWorldTime = 10; // seconds

    public WebService1()
    {
      //CODEGEN: This call is required by the ASP+ Web Services Designer
      InitializeComponent();
    }

    /// <summary>
    ///    Required method for Designer support - do not modify
    ///    the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
    }

    //WEB SERVICE EXAMPLE
    //The HelloWorld() example service returns the string Hello World
    //To build, uncomment the following lines then save and build the project
    //To test, right-click the Web Service's .asmx file and select View in Browser
    //
    [WebMethod(CacheDuration = CacheHelloWorldTime,
        Description="As simple as it gets - the ubiquitous Hello World.")]
    public string HelloWorld()
    {
      return "Hello World bbb";
    }

    [WebMethod(CacheDuration = 30,
       Description="Returns an array of Clients.")]
    public ClientData[] GetClientData(int Number)
    {
      ClientData [] Clients = null;

      if (Number > 0 && Number <= 10)
      {
        Clients = new ClientData[Number];
        for (int i = 0; i < Number; i++)
        {
          Clients[i].Name = "Client " + i.ToString();
          Clients[i].ID = i;
        }
      }
      return Clients;
    }
  }
}

 

Answer 1

User508577675 posted

OK.  I solved my problem.  I was trying to create a ClientData object based on a local ClientData object that I declared within the winform app.  What I needed to do was to create a ClientData object based on my webservice ClientData object.  Here is how it looks:

List<myWebSvc1.ClientData> ls = new List<myWebSvc1.ClientData>(s1.GetClientData(3));
foreach (myWebSvc1.ClientData cd in ls)
{
  Console.WriteLine(cd.ID.ToString() + "  " + cd.Name.ToString());
}

and here is the output inside the winform app:

0  Client 0
1  Client 1
2  Client 2

--same as the xml from the .asmx file.

Answer 2

User-1038610069 posted

Anyone know how to do this in a website? I have tried listbox and gridview but have had no success.