我可以创建动态 web 服务客户端引用而不将其引用添加到项目的服务引用中吗？

Question

I need to create dynamic references of multiple web services and sent some value with it.

Answer 1

To be truly dynamic, you have to do three things:

1) Get the service description (wsdl) from the web service 2) Generate the proxy code dynamically from the service description 3) Compile the code and expose it in your application - usually through reflection or some sort of dynamic scripting interface.

The code snippet below is from some experimenting I did a long time ago. It is not production code and won't compile, but should give you a head start if this is the direction you want to go.

It does not include step (3). The code generated can be compiled with classes provided in the System.CodeDom.Compiler namespace.

Uri uri = new Uri(_Url + "?wsdl");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.AllowAutoRedirect = true;
request.PreAuthenticate = false;
if (_User.Length > 0)
{
    request.UseDefaultCredentials = false;
    request.Credentials = new NetworkCredential(_User, _Password, _Domain);
}
WebResponse response = null;

try
{
    response = request.GetResponse();
}
catch (System.Net.WebException wex)
{
    response = wex.Response;
}
catch (Exception ex)
{
}

Stream requestStream = response.GetResponseStream();
ServiceDescription sd = ServiceDescription.Read(requestStream);
_ReferenceName = _Namespace + "." + sd.Services[0].Name;
ServiceDescriptionImporter Importer = new ServiceDescriptionImporter();
Importer.AddServiceDescription(sd, string.Empty, string.Empty);
Importer.ProtocolName = "Soap12";
Importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties;

CodeNamespace nameSpace = new CodeNamespace(_Namespace);
CodeCompileUnit ccu = new CodeCompileUnit();
ccu.Namespaces.Add(nameSpace);

ServiceDescriptionImportWarnings warnings = Importer.Import(nameSpace, ccu);
if (warnings == 0)
{
    StringWriter sw = new StringWriter(System.Globalization.CultureInfo.CurrentCulture);
    Microsoft.CSharp.CSharpCodeProvider prov = new Microsoft.CSharp.CSharpCodeProvider();
    CodeGeneratorOptions options = new CodeGeneratorOptions();
    options.BlankLinesBetweenMembers = false;
    options.BracingStyle = "C";

    prov.GenerateCodeFromNamespace(nameSpace, sw, options);

    _ProxySource = sw.ToString();
    sw.Close();
}

Answer 2

I don't have the code right now but I know this can be done, in fact in a former company I have worked we did have a generic web service client developed in house.

have a lock here:

Generic Web Service Proxy