Category: aspmvc

Disable browser cache in asp mvc

Taswar Bhatti July 29, 2011 1 Comment

Here is a simple trick on how to disable browser cache in asp mvc application with an attribute. If you have a base controller just add this to your base and all your request would have Pragma No-Cache

 public class NoCacheAttribute : ActionFilterAttribute
    {        
        public override void OnResultExecuting(ResultExecutingContext filterContext)
        {
            if (filterContext == null) throw new ArgumentNullException("filterContext");

            var cache = GetCache(filterContext);

            cache.SetExpires(DateTime.UtcNow.AddDays(-1));
            cache.SetValidUntilExpires(false);
            cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
            cache.SetCacheability(HttpCacheability.NoCache);
            cache.SetNoStore();

            base.OnResultExecuting(filterContext);
        }
       
        protected virtual HttpCachePolicyBase GetCache(ResultExecutingContext filterContext)
        {
            return filterContext.HttpContext.Response.Cache;
        }
     }
}

public class NoCacheAttribute : ActionFilterAttribute

{

public override void OnResultExecuting(ResultExecutingContext filterContext)

{

if (filterContext == null) throw new ArgumentNullException("filterContext");

var cache = GetCache(filterContext);

cache.SetExpires(DateTime.UtcNow.AddDays(-1));

cache.SetValidUntilExpires(false);

cache.SetRevalidation(HttpCacheRevalidation.AllCaches);

cache.SetCacheability(HttpCacheability.NoCache);

cache.SetNoStore();

base.OnResultExecuting(filterContext);

}

protected virtual HttpCachePolicyBase GetCache(ResultExecutingContext filterContext)

{

return filterContext.HttpContext.Response.Cache;

}

Simply add this to your base controller, and you are done 🙂

[NoCache]
public BaseController: Controller

1 2	[NoCache] public BaseController: Controller

ASP .NET, aspmvc

asp mvc, browser cache, pragma cache

Enable https on ASP.NET MVC 2 & 3, through Filters and web.config

Taswar Bhatti July 26, 2011 No Comments

To enable https on asp.net mvc, one can use the [RequireHttps] attribute on the base controller if you are using a base controller

[RequireHttps]
public class BaseController: Controller

1 2	[RequireHttps] public class BaseController: Controller

But what if you want to give an option to the installer or the client to enable it in web.config, the easy way to do it for asp mvc2 is to […]

ASP .NET, aspmvc, unit testing

asp .net mvc, mvc filter, ssl filters

My talk on WatiN , SpecFlow, BDD, Code and additional material

Taswar Bhatti April 2, 2011 No Comments

Thanks to everyone who came out for the Ottawa .Net Community talk yesterday on WatiN , SpecFlow, BDD, WebDriver, I had a blast. I would like to thank everyone who came out for the talk. Here is my presentation WatiN – Web Application Testing on Prezi You can find the code on github https://github.com/taswar/ODNC-WatiN-And-SpecFlow-Demo-Code Additional […]

.NET, Agile, ASP .NET, aspmvc, SpecFlow, WatiN

BDD, ie automation, specflow, watiN

ASP MVC, Jquery modifying a select drop down with Json data

Taswar Bhatti November 18, 2010 2 Comments

Was coding some new functionality and though I would post this, so that others can find it helpful. Lets say you have a form that has a checkbox that will update the select dropdown box with different values, when the checkbox is clicked. Something like the UI below. Your html code might look like

<input type="hidden" name="fieldId" value="123" />
Parent: <select name="FieldType" id="fieldTypeDropDown">
                        <option value="16">None</option>
                        <option value="4">Apple</option>
                        <option value="3">Orange</option>
                    </select>

Multiple: <input type="checkbox" name="fieldMultiple" id="fieldMultiple" />

Parent: <select name="FieldType" id="fieldTypeDropDown">

<option value="4">Apple</option>

<option value="3">Orange</option>

</select>

Multiple: <input type="checkbox" name="fieldMultiple" id="fieldMultiple" />

[…]

aspmvc, JQuery

asp .net mvc, asp mvc, Javascript, JQuery, mvc

Stubbing out ServiceLocator for unit testing

Taswar Bhatti June 30, 2010 2 Comments

There are certainly many ways to stub out dependency, using constructor injection, etc etc. Here is one way to quickly stub out ServiceLocator rather than implementing ServiceLocatorStub. Lets say you have code that uses a helper and the dependency is not quite the responsibility of that object but its the sub object that uses it. […]

Agile, aspmvc, Design, unit testing

C#, service locator, stub, TDD, unit testing

Json A circular reference was detected while serializing an object of type … in my asp mvc app

Taswar Bhatti June 9, 2010 7 Comments

I found this weird error when I was testing a no trivial test case in my app and was not able to find out what was wrong with it. It appears like a Json error in my asp mvc app, although the stack really doesn’t help 🙂

ystem.InvalidOperationException: A circular reference was detected while serializing an object of type 'TermBaseMvc.ViewModels.Udf.UdfValueViewModel'.
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeCustomObject(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeEnumerable(IEnumerable enumerable, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValue(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, SerializationFormat serializationFormat)
   at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj)
   at System.Web.Mvc.JsonResult.ExecuteResult(ControllerContext context)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass14.<InvokeActionResultWithFilters>b__11()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass14.<>c__DisplayClass16.<InvokeActionResultWithFilters>b__13()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass14.<>c__DisplayClass16.<InvokeActionResultWithFilters>b__13()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass14.<>c__DisplayClass16.<InvokeActionResultWithFilters>b__13()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult)
   at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName)

ystem.InvalidOperationException: A circular reference was detected while serializing an object of type 'TermBaseMvc.ViewModels.Udf.UdfValueViewModel'.

at System.Web.Script.Serialization.JavaScriptSerializer.SerializeValueInternal(Object o, StringBuilder sb, Int32 depth, Hashtable objectsInUse, SerializationFormat serializationFormat)