Silverlight and Web Reference

[joao_sousa2]

Usually in my Office projects I use Web Reference in Visual Studio to connect to SAP.

Problem with Silverlight is that the option is not available in VS, and I can only use Service Reference, which just don't work.

What I do is:

- In SOAMANAGER create binding with user/pass login.

- Open WSDL for binding

- Paste WSDL in Add Service Reference.

Visual Studio can read the service, but then throws a lot of generation errors...and the reference doesn't work.

Can anybody use these type of Service Reference in VS with SAP?

Thanks.

EDIT: One error is "The endpoint X is not compatible with Silverlight 3"

[joao_sousa2]

I removed ws-policy and now Visual Studio accepts the WSDL.

[former_member331416]

Hi Sousa,

I am trying to access a webservice created in SAP system via silverlight 3 application. I do not get any errors but i am unable to see any output of the servicall cal. here are the steps i followed:

1. Created a class zcl_** and created a service in sicf under sap/bc and added the class as the handler.

2. i have written a short text message say "hello world" in the handle_request method of the handler class.

3. Now i create a simple silverlight 3 application in VS8 and add the following code under MainPage.xaml.cs.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using System.IO;

using System.Net;

using System.Threading;

using System.Text;

namespace MySample1

{

public partial class MainPage : UserControl

{

public static ManualResetEvent allDone = new ManualResetEvent(false);

const int BUFFER_SIZE = 1024;

public MainPage()

{

InitializeComponent();

}

// The RequestState class passes data across async calls.

public class RequestState

{

const int BufferSize = 1024;

public StringBuilder RequestData;

public byte[] BufferRead;

public WebRequest Request;

public Stream ResponseStream;

// Create Decoder for appropriate enconding type.

public Decoder StreamDecode = Encoding.UTF8.GetDecoder();

public RequestState()

{

BufferRead = new byte[BufferSize];

RequestData = new StringBuilder(String.Empty);

Request = null;

ResponseStream = null;

}

}

private void getDataModel(object sender, RoutedEventArgs e)

{

System.Uri uri = new Uri("http://xxxx.xxx/sap/ztest_jvr?sap-client=000");

// Create the request object.

WebRequest wreq = WebRequest.Create(uri);

// Create the state object.

RequestState rs = new RequestState();

// Put the request into the state object so it can be passed around.

rs.Request = wreq;

// Issue the async request.

IAsyncResult r = (IAsyncResult)wreq.BeginGetResponse(

new AsyncCallback(RespCallback), rs);

// Wait until the ManualResetEvent is set so that the application

// does not exit until after the callback is called.

allDone.WaitOne();

DataModeltxt.Text = rs.RequestData.ToString();

}

private static void RespCallback(IAsyncResult ar)

{

// Get the RequestState object from the async result.

RequestState rs = (RequestState)ar.AsyncState;

// Get the WebRequest from RequestState.

WebRequest req = rs.Request;

// Call EndGetResponse, which produces the WebResponse object

// that came from the request issued above.

WebResponse resp = req.EndGetResponse(ar);

// Start reading data from the response stream.

Stream ResponseStream = resp.GetResponseStream();

// Store the response stream in RequestState to read

// the stream asynchronously.

rs.ResponseStream = ResponseStream;

// Pass rs.BufferRead to BeginRead. Read data into rs.BufferRead

IAsyncResult iarRead = ResponseStream.BeginRead(rs.BufferRead, 0,

BUFFER_SIZE, new AsyncCallback(ReadCallBack), rs);

}

private static void ReadCallBack(IAsyncResult asyncResult)

{

// Get the RequestState object from AsyncResult.

RequestState rs = (RequestState)asyncResult.AsyncState;

// Retrieve the ResponseStream that was set in RespCallback.

Stream responseStream = rs.ResponseStream;

// Read rs.BufferRead to verify that it contains data.

int read = responseStream.EndRead(asyncResult);

if (read > 0)

{

// Prepare a Char array buffer for converting to Unicode.

Char[] charBuffer = new Char[BUFFER_SIZE];

// Convert byte stream to Char array and then to String.

// len contains the number of characters converted to Unicode.

int len =

rs.StreamDecode.GetChars(rs.BufferRead, 0, read, charBuffer, 0);

String str = new String(charBuffer, 0, len);

// Append the recently read data to the RequestData stringbuilder

// object contained in RequestState.

//rs.RequestData.Append(

// Encoding.ASCII.GetString(rs.BufferRead, 0, read));

// Continue reading data until

// responseStream.EndRead returns u20131.

IAsyncResult ar = responseStream.BeginRead(

rs.BufferRead, 0, BUFFER_SIZE,

new AsyncCallback(ReadCallBack), rs);

}

else

{

if (rs.RequestData.Length > 0)

{

// Display data to the console.

string strContent;

strContent = rs.RequestData.ToString();

}

// Close down the response stream.

responseStream.Close();

// Set the ManualResetEvent so the main thread can exit.

allDone.Set();

}

return;

}

}

}

Under MainPage.xaml i have a simple code

<UserControl x:Class="MySample1.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480">

<Grid x:Name="LayoutRoot">

<TextBlock x:Name="DataModelLbl" HorizontalAlignment="Center" Text="Data Model" Margin="5" Width="120" Height="30"/>

<TextBox x:Name="DataModeltxt" HorizontalAlignment="Right" Width="120" Height="30" />

<Button x:Name="myButton" HorizontalAlignment="Left" Content="Get Data Model" Click="getDataModel" Width="120" Height="30"/>

</Grid>

</UserControl>

Now i build the applicaion and run it.

The system hangs. or it doesnt get me any output/error.

Do you have any idea?

is there any steps i am missing?

Best Regards, JVR

I build the application and run it.

I get