Web service Parser Error Message: Could not create type ‘xxx’

c#-4.0iis-7.5web services

I am getting a parser error when i try to browse my web service.

Already found so many answers, but none helped me. If anybody can guide me to a helpful link that i might have overlooked, it will be of great help.

Here is the scenario :

I have web service built in VS-2010 (framework 4.0) hosted on IIS 7.5 which uses "ASP.NET v4.0 Classic" app pool. This used to work fine until i reinstalled it. It started showing the Error below

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not create type 'AuthenticateUser'.

Source Error:

Line 1: <%@ WebService Language="C#"
CodeBehind="~/App_Code/AuthenticateUser.cs" Class="AuthenticateUser"
%>

Source File: /WebService101/Services/AuthenticateUser.asmx Line: 1

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1016

Please Help.

Best Answer

I got the same error, in my case resolution was to use full qualified class name (class name with namespace) in the .asmx file.

<%@ WebService Language="C#" CodeBehind="~/App_Code/AuthenticateUser.cs" Class="AuthenticateUser" %>

would become

<%@ WebService Language="C#" CodeBehind="~/App_Code/AuthenticateUser.cs" Class="MyProjectName.AuthenticateUser" %>

Related Solutions

500 -Internal error on web service

I just used SoapClient to hit your web service. It allows us to quickly supply arguments to your web service.

Suspect that your error is on NameSearch.asmx.cs:line 29 where you're likely trying to write or read the Event Log (specifically the Security log). Likely EventLog.WriteEntry().

The issue here is that, behind the scenes, your call is trying to VerifyAndCreateSource() without having proper authorization.

To solve this, grant the appropriate permissions to the Security Event Log. Likely the user context running is under NetworkService.

Consider implementing the steps in IIS7: Web Application writing to Event Log generates Security Exception. The main idea here is to allow Network Service, or whatever security context your app is running under, permission to write to the registry key

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\EventLog

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The full error thrown in your .NET code is:

System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Security.SecurityException: The source was not found, but some or all event logs could not be searched. To create the source, you need permission to read all event logs to make sure that the new source name is unique. Inaccessible logs: Security. at System.Diagnostics.EventLogInternal.FindSourceRegistration(String source, String machineName, Boolean readOnly, Boolean wantToCreate) at System.Diagnostics.EventLogInternal.SourceExists(String source, String machineName, Boolean wantToCreate) at System.Diagnostics.EventLogInternal.VerifyAndCreateSource(String sourceName, String currentMachineName) at System.Diagnostics.EventLogInternal.WriteEntry(String message, EventLogEntryType type, Int32 eventID, Int16 category, Byte[] rawData) at System.Diagnostics.EventLog.WriteEntry(String message) at WebServices.NameSearch.GetSearchResult(String prefixText, Int32 count) in C:\Users\xufurisa\Dropbox\Programs\PoliticProfiles\WebServices\NameSearch.asmx.cs:line 29

C# – Could not create type for webservice.asmx

I had the same error...

I solved it by changing the properties of my Xzy.asmx file:

Set Build Action to Content
Set Copy to Output Directory to Copy if newer (in my case it was set to "Do not copy")

I hope this helps anyone...

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