Add and Call WebService at runtime

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Security.Permissions;
using System.Web.Services.Description;

namespace ConnectionLib
{
internal class WsProxy
{
[SecurityPermissionAttribute(SecurityAction.Demand, Unrestricted = true)]
internal static object CallWebService(string webServiceAsmxUrl, string serviceName, string methodName, object[] args)
{
System.Net.WebClient client = new System.Net.WebClient(); // Connect To the web service
System.IO.Stream stream = client.OpenRead(webServiceAsmxUrl + "?wsdl"); // Now read the WSDL file describing a service.
ServiceDescription description = ServiceDescription.Read(stream); ///// LOAD THE DOM ///////// // Initialize a service description importer.

ServiceDescriptionImporter importer = new ServiceDescriptionImporter();

importer.ProtocolName = "Soap12"; // Use SOAP 1.2.
importer.AddServiceDescription(description, null, null); // Generate a proxy client. importer.Style = ServiceDescriptionImportStyle.Client; // Generate properties to represent primitive values.
importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties; // Initialize a Code-DOM tree into which we will import the service.
CodeNamespace nmspace = new CodeNamespace();
CodeCompileUnit unit1 = new CodeCompileUnit();
unit1.Namespaces.Add(nmspace); // Import the service into the Code-DOM tree. This creates proxy code that uses the service.
ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit1); if (warning == 0) // If zero then we are good to go
{
// Generate the proxy code
CodeDomProvider provider1 = CodeDomProvider.CreateProvider("CSharp"); // Compile the assembly proxy with the appropriate references
string[] assemblyReferences = new string[5] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" };
CompilerParameters parms = new CompilerParameters(assemblyReferences); CompilerResults results = provider1.CompileAssemblyFromDom(parms, unit1); // Check For Errors
if (results.Errors.Count > 0)
{ foreach (CompilerError oops in results.Errors)
{ System.Diagnostics.Debug.WriteLine("========Compiler error============");
System.Diagnostics.Debug.WriteLine(oops.ErrorText);
}
throw new System.Exception("Compile Error Occured calling webservice. Check Debug ouput window.");
}
// Finally, Invoke the web service method
object wsvcClass = results.CompiledAssembly.CreateInstance(serviceName);
MethodInfo mi = wsvcClass.GetType().GetMethod(methodName);
return mi.Invoke(wsvcClass, args);
}
else
{ return null;
}
}
}
}