Instance validation error calling web service - asp.net

I'm getting an instance validation error in my proxy class i use to call a web service. This proxy class was auto-generated by XSD2Code. To me the error doesn't match the code it's pointing to.
Exception Details:
System.InvalidOperationException:
Instance validation error:
'LessThanOrEqualTo' is not a valid
value for ComparisonOperatorType.
Source Error:
Line 12866: cswgetCapabilitiesResponse csw.cswgetCapabilities(cswgetCapabilitiesRequest request)
Line 12867: {
Line 12868: return base.Channel.cswgetCapabilities(request);
Line 12869: }
Line 12870:
Source File:
d:\webapp\App_Code\ogc.csw.proxy.cs
Line: 12868
Stack Trace:
[InvalidOperationException: Instance validation error: 'LessThanOrEqualTo' is not a valid value for ComparisonOperatorType.]
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadercsw.Read156_ComparisonOperatorType(String s) +582
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadercsw.Read157_ComparisonOperatorsType(Boolean isNullable, Boolean checkType) +742
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadercsw.Read162_Scalar_CapabilitiesType(Boolean isNullable, Boolean checkType) +746
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadercsw.Read165_Filter_Capabilities(Boolean isNullable, Boolean checkType) +746
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadercsw.Read166_CapabilitiesType(Boolean isNullable, Boolean checkType) +1430
Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReadercsw.Read280_Item() +281
Microsoft.Xml.Serialization.GeneratedAssembly.ArrayOfObjectSerializer11.Deserialize(XmlSerializationReader reader) +43
System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events) +579
[InvalidOperationException: There is an error in XML document (284, 13).]
System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events) +1375
System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle) +163
System.ServiceModel.Dispatcher.XmlSerializerOperationFormatter.DeserializeBody(XmlDictionaryReader reader, MessageVersion version, XmlSerializer serializer, MessagePartDescription returnPart, MessagePartDescriptionCollection bodyParts, Object[] parameters, Boolean isRequest) +606
[CommunicationException: Error in deserializing body of reply message for operation 'cswgetCapabilities'.]
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +4767763
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +1725
csw.cswgetCapabilities(cswgetCapabilitiesRequest request) +0
cswClient.csw.cswgetCapabilities(cswgetCapabilitiesRequest request) in d:\webapp\App_Code\ogc.csw.proxy.cs:12868
cswClient.cswgetCapabilities(GetCapabilitiesType1 GetCapabilities) in d:\webapp\App_Code\ogc.csw.proxy.cs:12875
tests_csw.Unnamed1_Click(Object sender, EventArgs e) in d:\webapp\tests\csw.aspx.cs:22
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +154
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3691

Is "LessThanOrEqualTo" meant to be a valid value? I think this message is saying that it tried to deserialize "LessThanOrEqualTo" as a value for the ComparisonOperatorType element (or attribute), but that the string "LessThanOrEqualTo" is not valid for the type of the element.

Related

IIS Breaks application after recycle

I recently have this strange issue with IIS. We have an ASP.NET website and recently it fails after an application pool recycle. When I stop the applicationpool, clear the "ASP.NET Temporary Files" and restart the applicationpool. It works again. When i manually recycle it, it breaks again. I can reproduce this every time. The big problem is that our web application recycles every night.
Can I in some way prevent the usage of these ASP.NET Temporary Files? Or how could i fix this issue.
[Edit]
this is a screenshot of the error:
Screenshot
[Edit 2:Full error page]
Server Error in 'WebSite' Application.
Could not load type from string value 'MyOwnClass'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.TypeLoadException: Could not load type from string value 'MyOwnClass'.
Source Error:
Line 120: private static void InitalizeApplicationContext()
Line 121: {
Line 122: Spring.Context.Support.ContextRegistry.GetContext();
Line 123: }
Line 124:
Source File: path-to-website\Global.asax Line: 122
Stack Trace:
[TypeLoadException: Could not load type from string value 'MyOwnClass'.]
Spring.Core.TypeResolution.TypeResolver.Resolve(String typeName) +240
Spring.Core.TypeResolution.GenericTypeResolver.Resolve(String typeName) +530
Spring.Core.TypeResolution.CachedTypeResolver.Resolve(String typeName) +411
Spring.Core.TypeResolution.TypeResolutionUtils.ResolveType(String typeName) +85
Spring.Objects.Factory.Support.AbstractObjectDefinition.ResolveObjectType() +39
Spring.Objects.Factory.Support.AbstractObjectFactory.ResolveObjectType(RootObjectDefinition rod, String objectName) +74
[CannotLoadObjectTypeException: Cannot resolve type [MyOwnClass] for object with name 'AuthenticationUtil' defined in file [path-to-website\spring\Utils.xml] line 5]
Spring.Objects.Factory.Support.AbstractObjectFactory.ResolveObjectType(RootObjectDefinition rod, String objectName) +180
Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.PredictObjectType(String objectName, RootObjectDefinition mod) +108
Spring.Objects.Factory.Support.DefaultListableObjectFactory.DoGetObjectNamesForType(Type type, Boolean includeNonSingletons, Boolean allowEagerInit) +879
Spring.Objects.Factory.Support.DefaultListableObjectFactory.GetObjectsOfType(Type type, Boolean includePrototypes, Boolean includeFactoryObjects) +99
Spring.Context.Support.AbstractApplicationContext.GetObjectsOfType(Type type) +51
Spring.Messaging.Core.MessageQueueMetadataCache.Initialize() +78
Spring.Messaging.Core.MessageQueueTemplate.CreateDefaultMetadataCache() +253
Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InvokeInitMethods(Object target, String name, IConfigurableObjectDefinition definition) +250
Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) +740
Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) +637
[ObjectCreationException: Error thrown by a dependency of object 'AddExamSessionToQueueCommand' defined in 'file [path-to-website\spring\Commands.xml] line 22' : Initialization of object failed : Cannot resolve type [MyOwnClass] for object with name 'AuthenticationUtil' defined in file [path-to-website\spring\Utils.xml] line 5
while resolving 'constructor argument with index 0' to 'MsmqExamSessionAccessCodeService' defined in 'file [path-to-website\spring\Services.xml] line 23'
while resolving 'MessageQueueTemplate' to 'ExamSessionAccessCodeMessageQueueTemplate' defined in 'file [path-to-website\spring\MsmqMessageQueueTemplates.xml] line 18']
Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolveReference(IObjectDefinition definition, String name, String argumentName, RuntimeObjectReference reference) +585
Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolvePropertyValue(String name, IObjectDefinition definition, String argumentName, Object argumentValue) +429
Spring.Objects.Factory.Support.ObjectDefinitionValueResolver.ResolveValueIfNecessary(String name, IObjectDefinition definition, String argumentName, Object argumentValue) +19
Spring.Objects.Factory.Support.ConstructorResolver.ResolveConstructorArguments(String objectName, RootObjectDefinition definition, ObjectWrapper wrapper, ConstructorArgumentValues cargs, ConstructorArgumentValues resolvedValues) +327
Spring.Objects.Factory.Support.ConstructorResolver.GetConstructorInstantiationInfo(String objectName, RootObjectDefinition rod, ConstructorInfo[] chosenCtors, Object[] explicitArgs) +263
Spring.Objects.Factory.Support.ConstructorResolver.AutowireConstructor(String objectName, RootObjectDefinition rod, ConstructorInfo[] chosenCtors, Object[] explicitArgs) +80
Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.CreateObjectInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) +216
Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) +863
Spring.Objects.Factory.Support.AbstractObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) +379
Spring.Objects.Factory.Support.AbstractObjectFactory.GetObjectInternal(String name, Type requiredType, Object[] arguments, Boolean suppressConfigure) +1744
Spring.Objects.Factory.Support.DefaultListableObjectFactory.PreInstantiateSingletons() +722
Spring.Context.Support.AbstractApplicationContext.Refresh() +1009
Spring.Context.Support.XmlApplicationContext..ctor(XmlApplicationContextArgs args) +206
_dynamic_Spring.Context.Support.XmlApplicationContext..ctor(Object[] ) +320
Spring.Context.Support.RootContextInstantiator.InvokeContextConstructor(ConstructorInfo ctor) +169
Spring.Context.Support.ContextInstantiator.InstantiateContext() +55
Spring.Context.Support.ContextHandler.InstantiateContext(IApplicationContext parentContext, Object configContext, String contextName, Type contextType, Boolean caseSensitive, String[] resources) +174
Spring.Context.Support.ContextHandler.Create(Object parent, Object configContext, XmlNode section) +476
[ConfigurationErrorsException: Error creating context 'spring.root': Could not load type from string value 'MyOwnClass'.]
System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) +278
System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject) +2095
System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject) +2023
System.Configuration.BaseConfigurationRecord.GetSection(String configKey) +79
System.Configuration.ConfigurationManager.GetSection(String sectionName) +91
Spring.Util.ConfigurationUtils.GetSection(String sectionName) +100
Spring.Context.Support.ContextRegistry.InitializeContextIfNeeded() +68
Spring.Context.Support.ContextRegistry.GetContext() +83
ASP.global_asax.InitalizeApplicationContext() in path-to-website\Global.asax:122
ASP.global_asax.Application_Start(Object sender, EventArgs e) in path-to-website\Global.asax:20
[HttpException (0x80004005): Error creating context 'spring.root': Could not load type from string value 'MyOwnClass'.]
System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +540
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +186
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +172
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +402
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +343
[HttpException (0x80004005): Error creating context 'spring.root': Could not load type from string value 'MyOwnClass'.]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +539
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +125
System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +731
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1590.0

No parameterless constructor defined for this object for home controller

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.MissingMethodException: No parameterless constructor defined for this object.
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[MissingMethodException: No parameterless constructor defined for this object.]
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +159
System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark) +256
System.Activator.CreateInstance(Type type, Boolean nonPublic) +127
System.Activator.CreateInstance(Type type) +11
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +92
[InvalidOperationException: An error occurred when trying to create a controller of type 'Web.Controllers.HomeController'. Make sure that the controller has a parameterless public constructor.]
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +256
System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) +81
Castle.Proxies.Invocations.IControllerFactory_CreateController.InvokeMethodOnTarget() +155
Castle.DynamicProxy.AbstractInvocation.Proceed() +116
Glimpse.Core.Extensibility.AlternateMethod.NewImplementation(IAlternateMethodContext context) +71
Castle.DynamicProxy.AbstractInvocation.Proceed() +604
Castle.Proxies.IControllerFactoryProxy.CreateController(RequestContext requestContext, String controllerName) +193
System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +270
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +86
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +12639055
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +288
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.18447
Add the following parameterless constructor to your controller:
public HomeController()
{
//...
}
Internally, the MVC engine (DefaultControllerActivator) is looking for such a constructor in order to instantiate your controller.

SignalR HTTP 500 when calling server method from client

I'm just getting started with SignalR and have been able to broadcast messages out to all connected clients without any problems. I'd now like to have my client (javascript) join a group and receive only messages for that group. In my hub, I have the following method that adds connections to named groups:
public Task JoinGroup(string groupName)
{
return this.Groups.Add(Context.ConnectionId, groupName);
}
On the client, I have the following JS:
var latLonBounds = new google.maps.LatLngBounds();
var tripIdentifier = '#Model.TripIdentifier';
$(function () {
var hub = $.connection.locationHub;
hub.client.updateLocation = function (coordinates) {
// Implementation omitted
});
latLonBounds.extend(position);
map.fitBounds(latLonBounds);
};
$.connection.hub.logging = true;
$.connection.hub.start().done(function() {
hub.server.joinGroup(tripIdentifier);
});
});
When my page loads,in Chrome, I see an HTTP 500 for the following URL in the console:
http://localhost:49914/signalr/send?transport=serverSentEvents&connectionToken=AQAAANCMnd8BFdERjHoAwE%2FCl%2BsBAAAA8OmZGDrRfEaOjaHahkkarwAAAAACAAAAAAAQZgAAAAEAACAAAADM78kCBInmZa7OROdPoXraiugBXLR5Xu3htxYC2JSnSAAAAAAOgAAAAAIAACAAAAAZwnPx6GMKOiw%2FivqQPlSfCb4WNP342YxvGyBpalmjSDAAAADljl1vg%2F7GYtD3R4AA2A9LXEnNZkyQVQjDUrW7ZVbvfPpWz1GCcOn6aw5yrkrWFrhAAAAAyX5otz0Xhx8tuIRgX2Pr1b9ZWFMvoairvqzns1%2FhjN%2BRhDIuAqAfonTbsZDjkdyDAZXzAKQqwTEKhpa5LYBhKg%3D%3D
In Visual Studio, I see the following stack trace:
SignalR exception thrown by Task: System.AggregateException: One or more errors occurred. ---> System.MissingMethodException: No parameterless constructor defined for this object.
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at Microsoft.AspNet.SignalR.Hubs.DefaultHubActivator.Create(HubDescriptor descriptor)
at Microsoft.AspNet.SignalR.Hubs.DefaultHubManager.ResolveHub(String hubName)
at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.CreateHub(IRequest request, HubDescriptor descriptor, String connectionId, StateChangeTracker tracker, Boolean throwIfFailedToCreate)
at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.OnReceived(IRequest request, String connectionId, String data)
at Microsoft.AspNet.SignalR.PersistentConnection.<>c__DisplayClassa.<>c__DisplayClassc.<ProcessRequest>b__7()
at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(Func`1 func)
--- End of inner exception stack trace ---
---> (Inner Exception #0) System.MissingMethodException: No parameterless constructor defined for this object.
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at Microsoft.AspNet.SignalR.Hubs.DefaultHubActivator.Create(HubDescriptor descriptor)
at Microsoft.AspNet.SignalR.Hubs.DefaultHubManager.ResolveHub(String hubName)
at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.CreateHub(IRequest request, HubDescriptor descriptor, String connectionId, StateChangeTracker tracker, Boolean throwIfFailedToCreate)
at Microsoft.AspNet.SignalR.Hubs.HubDispatcher.OnReceived(IRequest request, String connectionId, String data)
at Microsoft.AspNet.SignalR.PersistentConnection.<>c__DisplayClassa.<>c__DisplayClassc.<ProcessRequest>b__7()
at Microsoft.AspNet.SignalR.TaskAsyncHelper.FromMethod(Func`1 func)<---
If I remove the call to hub.server.joinGroup(tripIdentifier); from my JS, then I don't get the HTTP 500/exception so it seems like this line is the source of the exception.
Any suggestions as to what I can do to get group registration working would be much appreciated.
Thanks!
This is the part of the stack that tells you what's wrong:
---> (Inner Exception #0) System.MissingMethodException: No parameterless constructor defined for this object.
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Activator.CreateInstance(Type type)
at Microsoft.AspNet.SignalR.Hubs.DefaultHubActivator.Create(HubDescriptor descriptor
Basically what's that's saying is your hub class doesn't have a parameterless constructor. If you're trying to setup dependency injection for your hubs you appear to have an issue with registering your dependency resolver with SignalR. If you provide more details we can probably help you with getting that fixed as well.

ArgumentException: Unterminated string passed in

I recently encountered this error in one of the pages in my site.
[ArgumentException: Unterminated string passed in. (26): {"selectedIndexes":["0"],"]
at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeString()
at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeMemberName()
at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeDictionary(Int32\ depth)
at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32\ depth)
at System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String\ input, Int32 depthLimit, JavaScriptSerializer serializer)
at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer\ serializer, String input, Type type, Int32 depthLimit)
at System.Web.Script.Serialization.JavaScriptSerializer.DeserializeObject(String\ input)
at Telerik.Web.UI.RadCompositeDataBoundControl.LoadPostData(String postDataKey,\ NameValueCollection postCollection)
at Telerik.Web.UI.RadCompositeDataBoundControl.System.Web.UI.IPostBackDataHandler.LoadPostData(String\ postDataKey, NameValueCollection postCollection)
at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean\ fBeforeLoad)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,\ Boolean includeStagesAfterAsyncPoint)
[HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown.]
at System.Web.UI.Page.HandleError(Exception e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,\ Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint,\ Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.pages_appeal_appealaction_aspx.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
What could be the reason for this exception ? Any ideas how to solve it ??
Yep. This error happens when the ASP.NET system receives a request, routes it to your handler and ModelBinder takes over to map values passed in to parameters in your handler. When one of those parms is a string and that string is started but not terminated, it throws the System.ArgumentException from the System.String.DeserializeString() method.
You have two options.
Fix the string data on the browser in JavaScript before you send it. (duh).
Create a custom Model Binder to handle the exception gracefully and send back a 500-series HTTP error or better yet, fix the data in a predictable way. That fixing is not always possible like in a sound file, image, movie or other base64-encoded blob.
Here's how to do #2 - Creating a custom model binder.

What does a stacktrace mean when there are two of them?

I have an MVC application and it has essentially two stacktraces, im wondering why there are two of them though?..
[MissingMethodException: No parameterless constructor defined for this object.]
System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +67
[InvalidOperationException: An error occurred when trying to create a controller of type 'PteDotNet.Web.Controllers.BlogController'. Make sure that the controller has a parameterless public constructor.]
System.Web.Mvc.DefaultControllerActivator.Create(RequestContext requestContext, Type controllerType) +182
System.Web.Mvc.DefaultControllerFactory.GetControllerInstance(RequestContext requestContext, Type controllerType) +80
System.Web.Mvc.DefaultControllerFactory.CreateController(RequestContext requestContext, String controllerName) +74
System.Web.Mvc.MvcHandler.ProcessRequestInit(HttpContextBase httpContext, IController& controller, IControllerFactory& factory) +232
System.Web.Mvc.<>c__DisplayClass6.<BeginProcessRequest>b__2() +49
System.Web.Mvc.<>c__DisplayClassb`1.<ProcessInApplicationTrust>b__a() +13
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Func`1 func) +124
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContextBase httpContext, AsyncCallback callback, Object state) +98
System.Web.Mvc.MvcHandler.BeginProcessRequest(HttpContext httpContext, AsyncCallback callback, Object state) +50
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData) +16
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8970356
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +184
One is a stacktrace of an inner exception.
It looks like you first got a MissingMethodException, with reason
No parameterless constructor defined for this object.
That caused an InvalidOperationException, with reason
An error occurred when trying to create a controller of type 'PteDotNet.Web.Controllers.BlogController'. Make sure that the controller has a parameterless public constructor.
So apparently your BlogController needs a parameterless constructor.
I'am not completely sure, but It looks like the Root Cause:
The MissingMethodException is fired first, then the InvalidOperationException gets fired, because of the first Exceptin
The InvalidOperationException is the exception thrown, but it is thrown as a result of a MissingMethodException and this exception is included as the InnerException of the InvalidOperationException. The InvalidOperationException explains what went wrong but looking at the InnerException you can see where the failure was triggered in the first place.
When you evaluate ToString() on an exception with an inner exception you get stack traces of all nested inner exceptions to help you understand the problem. A common mistake is to use ex.Message + ex.StackTrace for diagnostics purposes but you loose information about inner exceptions. Unless you want to hide this valuable information you should always use ex.ToString() when logging exceptions.
In the MVC framework there is code similar to this:
try {
// Will throw MissingMethodException if there is no parameterless constructor.
var controller = Activator.CreateInstance(type);
...
}
catch (MissingMethodException ex) {
var message = String.Format("An error occurred when trying to create a controller of type '{0}'. Make sure that the controller has a parameterless public constructor.", type);
throw new InvalidOperationException(message, ex);
}
So instead of getting a MissingMethodException which might confuse you, you get an InvalidOperationException with a nice explanation. This is an example of best practice when it comes to exception handling.

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