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POHow can I return a user defined object from ASMX Webservice
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  1. POHow can I return a user defined object from ASMX Webservice
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    copied!<pre><code> [WebMethod] public engineer getItem() { DataClasses1DataContext db = new DataClasses1DataContext(); List&lt;string&gt; list = new List&lt;string&gt;(); string tcNo="13609224456"; var bilgiler = db.bilgilers.First(c =&gt; c.tc_kimlik_no ==tcNo); string adi = bilgiler.adi; string soyadi = bilgiler.soyadi; string universite = bilgiler.universite; engineer e = new engineer(tcNo, adi, soyadi, universite); return e; } </code></pre> <p>I have more than one method and I can run the webservice without error but when I call the <code>getItem()</code> method I get the following exception. How can I fix the problem?</p> <pre><code>[InvalidOperationException: Parametresiz oluşturucusu olmadığından MUHENDIS.Service1.engineer seri hale getirilemez.] System.Xml.Serialization.TypeDesc.CheckSupported() +3938411 System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo source, Boolean directReference, Boolean throwOnError) +170 System.Xml.Serialization.XmlReflectionImporter.ImportMemberMapping(XmlReflectionMember xmlReflectionMember, String ns, XmlReflectionMember[] xmlReflectionMembers, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +65 System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(XmlReflectionMember[] xmlReflectionMembers, String ns, Boolean hasWrapperElement, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +236 [InvalidOperationException: 'getItemResult' yansıtmada bir hata oluştu.] System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(XmlReflectionMember[] xmlReflectionMembers, String ns, Boolean hasWrapperElement, Boolean rpc, Boolean openModel, RecursionLimiter limiter) +843 System.Xml.Serialization.XmlReflectionImporter.ImportMembersMapping(String elementName, String ns, XmlReflectionMember[] members, Boolean hasWrapperElement, Boolean rpc, Boolean openModel, XmlMappingAccess access) +130 System.Web.Services.Protocols.SoapReflector.ImportMembersMapping(XmlReflectionImporter xmlImporter, SoapReflectionImporter soapImporter, Boolean serviceDefaultIsEncoded, Boolean rpc, SoapBindingUse use, SoapParameterStyle paramStyle, String elementName, String elementNamespace, Boolean nsIsDefault, XmlReflectionMember[] members, Boolean validate, Boolean openModel, String key, Boolean writeAccess) +223 System.Web.Services.Protocols.SoapReflector.ReflectMethod(LogicalMethodInfo methodInfo, Boolean client, XmlReflectionImporter xmlImporter, SoapReflectionImporter soapImporter, String defaultNs) +2989 </code></pre> <p><em>Edit:</em> Google translates the message on the exceptions as the following:</p> <ol> <li>MUHENDIS.Service1.engineer not a parameterless constructor be serialized.</li> <li>'getItemResult' to reflect the error occurred.</li> </ol>
 

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