[Mono-list] Writing a (ASP.NET) Web Service Client using Mono-0.29 on Libranet2.8

[Martin Gamsjaeger]

Hi, 
 
I just installed Mono-0.29 from sources on my Libranet2.8 desktop. Everything ran very 
smooth, and after reading a few hints on how to complete the install (getting the 
missing asp_state.exe.config and commenting out the bytefx.snk usage) I had an almost 
ready working version of Mono! Let me say here: Thanks! it's great :-) 
 
Still, I'm facing two little problems. The first one Mono (XSP) not being able to run the 
ConverterService.asmx with the following error: 
 
--------------------------- 
Compilation Error 
 
Description: Error compiling a resource required to service this request. Review your 
source file and modify it to fix this error.  
 
Error message: /tmp/tmp6544406f.cs(58,0) : error CS0246: Could not find attribute 
'TraceExtension' (are you missing a using directive or an assembly reference ?) 
/tmp/tmp6544406f.cs(67,0) : error CS0246: Could not find attribute 'TraceExtension' 
(are you missing a using directive or an assembly reference ?) 
/tmp/tmp6544406f.cs(77,0) : error CS0246: Could not find attribute 'TraceExtension' 
(are you missing a using directive or an assembly reference ?) 
/tmp/tmp6544406f.cs(94,0) : error CS0246: Could not find attribute 'TraceExtension' 
(are you missing a using directive or an assembly reference ?) 
/tmp/tmp6544406f.cs(111,0) : error CS0246: Could not find attribute 'TraceExtension' 
(are you missing a using directive or an assembly reference ?) 
/tmp/tmp6544406f.cs(30,0) : error CS0246: Could not find attribute 'Dump' (are you 
missing a using directive or an assembly reference ?) 
/tmp/tmp6544406f.cs(31,0) : error CS0246: Could not find attribute 'Encrypt' (are you 
missing a using directive or an assembly reference ?) 
(0,0) : error failed: 7 error(s), 0 warnings 
  
File name: /home/ofi/gamsl/mono/xsp-0.8/server/test/ConverterService.asmx 
 
Source File: /tmp/tmp6544406f.cs 
---------------------------------------------------- 
 
Before I changed web.config the situation was even worse because mono wasn't able to 
run any of it's web service examples, because the web.config file coming with release 
0.29 seems somehow broken. I could improve this situation by changing web.config to 
the following (changes in the <soapExtensionTypes> section): 
 
-------------------------------------------------------------- 
<?xml version="1.0" encoding="utf-8"?> 
<configuration> 
    <configSections> 
	    <sectionGroup name="mono.aspnet"> 
		<section name="acceptEncoding" 
type="Mono.Http.AcceptEncodingSectionHandler, Mono.Http"/> 
	    </sectionGroup> 
    </configSections> 
 
    <system.web> 
        <customErrors mode="Off"/> 
	<webServices> 
		<soapExtensionTypes> 
			<add type="DumpExtension, extensions" priority="0" group="0" /> 
			<add type="EncryptExtension, extensions" priority="0" group="0" /> 
			<add type="TraceExtension, extensions" priority="0" groups="0" /> 
 
		</soapExtensionTypes> 
	</webServices> 
	<authentication mode= "Forms"> 
	</authentication> 
    	<httpModules> 
            <add name="AcceptEncodingModule" type="Mono.Http.AcceptEncodingModule, 
Mono.Http"/> 
	</httpModules> 
    </system.web> 
 
    <mono.aspnet> 
        <acceptEncoding> 
	    <!-- Change disabled to 'no' to enable gzip content encoding --> 
	    <add encoding="gzip" type="Mono.Http.GZipWriteFilter, Mono.Http" 
disabled="no" /> 
	</acceptEncoding> 
    </mono.aspnet> 
 
    <appSettings> 
	<add key="MonoServerDefaultIndexFiles" 
	     value="index.aspx, Default.aspx, default.aspx, index.html, index.htm" /> 
	<add key="DBProviderAssembly" 
	     value="Mono.Data.PostgreSqlClient"/> 
	<add key="DBConnectionType" 
	     value="Mono.Data.PostgreSqlClient.PgSqlConnection"/> 
	<add key="DBConnectionString" 
	     
value="hostaddr=127.0.0.1;user=monotest;password=monotest;dbname=monotest"/> 
    </appSettings> 
</configuration> 
------------------------- 
 
After doing this I was able to run TestService.asmx and a little example service I wrote 
my own, but I still am not able to run ConverterService.asmx with the above error 
message. What needs to be done here? 
 
 
My second and actually more important question is how to write a client for a web 
service. I know that with microsofts .net implementation one has to use the wsdl.exe tool 
to generate a c# proxy file, in which you specify the namespace for the proxy, but there 
seems to be no equivalent way in mono, since the proxy file is automatically generated. I 
now have the problem that my client will not find my web service and complain with the 
following error message: 
 
--------------------------------------- 
Description: Error compiling a resource required to service this request. Review your 
source file and modify it to fix this error.  
 
Error message: /home/ofi/gamsl/mono/xsp-0.8/server/test/Adder.aspx.cs(13,0) : error 
CS0246: Cannot find type `TimeService' 
(0,0) : error failed: 1 error(s), 0 warnings 
  
File name: /home/ofi/gamsl/mono/xsp-0.8/server/test/Adder.aspx.cs 
-------------------------------------------------------------------------------------------------------- 
 
Here is my sample service and client: 
 
TimeService.asmx: 
----------------------------- 
 
<%@ WebService Language="C#" Class="TimeService"%> 
 
using System; 
using System.Text; 
using System.Web.Services; 
 
public class TimeService : WebService 
{ 
  [WebMethod(Description="Returns the current time")] 
  public string GetTime() 
  { 
    return System.DateTime.Now.ToLongTimeString(); 
  } 
} 
 
TimeClient.aspx: 
-------------------------- 
 
<%@ Page Language="C#" Inherits="TimeClientPage" Src="TimeClient.aspx.cs"%> 
<html> 
  <head><title>Time on server</title></head> 
  <body> 
    <form method="post" Runat="server"> 
      <b>Click for time on Server</b> 
      <asp:Button ID="ok" Text="Time" OnClick="ButtonClick" Runat="server"/> <br> 
      <asp:Label ID="time" Text="Here comes the time ..." Runat="server"/> 
    </form> 
  </body> 
</html> 
 
TimeClient.aspx.cs: 
------------------------------ 
 
using System; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
 
public class TimeClientPage : Page 
{ 
  protected Label time; 
  protected Button ok; 
 
  public void ButtonClick(object sender, EventArgs e) 
  { 
    TimeService service = new TimeService(); 
    total.Text = service.GetTime(); 
  } 
} 
 
All the files reside in "xsp-0.8/server/test" and xsp.exe is started from this folder. 
 
Now my question: How can I specify the namespace where to find the service? If i put 
the service itself in a namespace (that is in file TimeService.asmx writing "namespace 
XXX { ... }) it won't work. Strange is also that when I ask the TimeService Object about 
it's namespace using "string ns = new TimeService().GetType().Namespace" it gives me 
"http://tempuri.org/" which is no valid namespace name in C# (at least it gives me syntax 
errors when I try "using http://tempuri.org/") 
 
Can anyone tell me what I'm doing wrong here? 
 
Thanks in advance for your help and your great piece of software! 
gamsl