Impersonation level not provided or invalid

Question

I get an error while consuming the lists.asmx webservice. 
The methods GetListCollection and GetList("ListName") are returning results without any problem.  When i call client.GetListItems(documentLibraryName, "All Items", null, null, null, null, null); it gives the following error:

 Server was unable to process request. ---> The type initializer for 'Microsoft.SharePoint.SoapServer.SoapServerException' threw an exception. ---> Could not load file or assembly 'System.Web.Services, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. Either a required impersonation level was not provided, or the provided impersonation level is invalid. (Exception from HRESULT: 0x80070542)

My app.config:

<bindings>

<basicHttpBinding>

<binding name="ListsSoap" closeTimeout="00:01:00" openTimeout="00:01:00"

receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"

bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"

maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"

messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"

useDefaultWebProxy="true">

<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"

maxBytesPerRead="4096" maxNameTableCharCount="16384" />

<security mode="Transport">

<transport clientCredentialType="Ntlm" proxyCredentialType="None"

realm="" />

<message clientCredentialType="UserName" algorithmSuite="Default" />

</security>

</binding>

</basicHttpBinding>

</bindings>

<client>

<endpoint address="https://server/RD/_vti_bin/Lists.asmx" behaviorConfiguration="EndpointBehavior"

binding="basicHttpBinding" bindingConfiguration="ListsSoap"

contract="ListsService.ListsSoap" name="ListsSoap" />

</client>

My Code:

sharepointgetlistproject.ListsService.ListsSoapClient client = new sharepointgetlistproject.ListsService.ListsSoapClient("ListsSoap");

client.ClientCredentials.UserName.UserName = "DOMAIN\username";

client.ClientCredentials.UserName.Password = password;

I also tried to use clientCredentialType="Windows" but then i got an  "Unauthorized" error.

What can be the problem here?

Thanx in advance!

Answer 1

I've also been trying to get this working for a couple of hours. I finally cracked it.

You need to allow your client endpoint to impersonate.

Try adding the following to your <system.servicemodel>

        <behaviors>
            <endpointBehaviors>
                <behavior name="ImpersonationBehavior">
                    <clientCredentials>
                        <windows allowedImpersonationLevel="Impersonation"/>
                    </clientCredentials>
                </behavior>
            </endpointBehaviors>
        </behaviors>

Now within the endpoint tag, set the following property: bindingConfiguration="ImpersonationBehavior"