In BreezeController:
public IQueryable<Entities> Index()
{
return this.context.entities.Where(e => e.value > 100);
}
Breeze query query.inlineCount(true) returns count after Where, but how I can return count of entities before Where statement or manually set count to response? I know about filters, but in my task I need Where statement right in action.
Works for me
[Breeze.WebApi.BreezeController]
public class MyBreezeController : System.Web.Http.ApiController
{
private readonly Breeze.WebApi.EFContextProvider<MyDbContext> context
= new Breeze.WebApi.EFContextProvider<MyDbContext>();
[SetInlineCountFilter]
[Breeze.WebApi.BreezeQueryable]
public System.Linq.IQueryable<MyEntity> Index()
{
return this.context.Context.MyEntities.Where(e => e.Value > 100);
}
}
public class SetInlineCountFilterAttribute : System.Web.Http.Filters.ActionFilterAttribute
{
public override void OnActionExecuted(System.Web.Http.Filters.HttpActionExecutedContext actionExecutedContext)
{
var content = (System.Net.Http.ObjectContent)actionExecutedContext.Response.Content;
var result = (Breeze.WebApi.QueryResult)content.Value;
result.InlineCount = 42;
base.OnActionExecuted(actionExecutedContext);
}
}
Now you can get value of inlinecount from anywhere and add code for pass it to filter
Or doing all sevrer-side breeze work manually:
[Breeze.WebApi.BreezeController]
public class MyBreezeController : System.Web.Http.ApiController
{
private readonly Breeze.WebApi.EFContextProvider<MyDbContext> context
= new Breeze.WebApi.EFContextProvider<MyDbContext>();
public QueryResult Index()
{
return new QueryResult
{
InlineCount = 42,
Results = this.context.Context.MyEntities.Where(e => e.Value > 100)
};
}
}
And get query options from request this.Request.RequestUri.Query
Related
I would like to use ODATA. Unfortunately I get neither count nor odata.context back. Select, filter, orderBy are working though. Does anyone have an idea where my error is?
[AllowAnonymous]
[ApiController]
[Route("api/v1/wea")]
[Produces("application/json")]
[ODataRouteComponent("api/v1/wea")]
public class WeatherForecastODataController : ODataController
{
[HttpGet]
[EnableQuery]
public IEnumerable<WeatherForecast> Get()
{
_logger.LogWarning("Get Forecast");
return _forecasts;
}
}
public static IMvcBuilder AddODataOptions(this IMvcBuilder builder)
{
builder.AddOData(options => {
var defaultBatchHandler = new DefaultODataBatchHandler();
defaultBatchHandler.MessageQuotas.MaxNestingDepth = 2;
defaultBatchHandler.MessageQuotas.MaxOperationsPerChangeset = 10;
defaultBatchHandler.MessageQuotas.MaxReceivedMessageSize = 100;
var model1 = EdmBuilder.BuildV1();
options.Select().Filter().OrderBy().Count().SetMaxTop(2).Expand();
options.AddRouteComponents("api/v1", model1, defaultBatchHandler);
});
return builder;
}
I have created a repository in this application and a session list is created in order to keep data in memory. I am not able to retrieve my list from the controller in order to populate a grid view which I have.
This is my Repository
namespace ClientSearch.Repository
{
public class Repo
{
public HttpSessionStateBase session;
public Repo (HttpSessionStateBase session)
{
this.session = session;
}
public void SetClient(ClientInfo client)
{
List<ClientInfo> mylist = new List<ClientInfo>();
mylist = (List<ClientInfo>)this.session["test"];
}
public List<ClientInfo> GetClient()
{
return (List<ClientInfo>)session["list"];
}
}
}
This is my Controller function
public ActionResult SearchClient()
{
HttpSessionStateBase session = HttpContext.Session;
Repo repo = new Repo(session);
var result = repo.GetClient();
return Json(new
{
list = result,
count = result.Count
}, JsonRequestBehavior.AllowGet);
}
my setting control
public JsonResult ClientInformation(ClientInfo client)
{
JsonResult result = new JsonResult();
result.Data = client;
result.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
return result;
}
I combine my tables to Result. İt works with no problem.
public ActionResult Index()
{
var Result = new Modeller
{
KISALTMALAR = context.KISALTMALAR.ToList(),
FirmaListesiGetir = context.SP_FIRMA_LISTESI_GETIR().ToList(),
};
return View(Result );
}
However, when using multiple actions, i have to write the above code every time.
For instance:
public ActionResult Customer()
{
var Result = new Modeller
{
KISALTMALAR = context.KISALTMALAR.ToList(),
FirmaListesiGetir = context.SP_FIRMA_LISTESI_GETIR().ToList(),
};
return View(Result );
}
public ActionResult Product()
{
var Result = new Modeller
{
KISALTMALAR = context.KISALTMALAR.ToList(),
FirmaListesiGetir = context.SP_FIRMA_LISTESI_GETIR().ToList(),
};
return View(Result );
}
İ have to combine my tables in every actionresult.
How can i write only one time and use my Result everywhere ?
You may do as follows. I always use this approach:
public Modeller GetResult()
{
var result = new Modeller
{
KISALTMALAR = context.KISALTMALAR.ToList(),
FirmaListesiGetir = context.SP_FIRMA_LISTESI_GETIR().ToList(),
};
return result;
}
public ActionResult Customer()
{
var Result = GetResult();
return View(Result);
}
public ActionResult Product()
{
var Result = GetResult();
return View(Result);
}
One option is to just reference a shared class/service. For example:
public class YourService
{
public static Modeller GetCombinedTables()
{
return new Modeller
{
KISALTMALAR = context.KISALTMALAR.ToList(),
FirmaListesiGetir = context.SP_FIRMA_LISTESI_GETIR().ToList()
};
}
}
Then, in your action you can just call that method:
public ActionResult Customer()
{
var Result = YourService.GetCombinedTables();
return View(Result);
}
You can also create the Result variable at controller level, so that way you don't have to assign it for every action.
I've seen a lot of similar posts on this, but haven't found the answer specific to controller parameters.
I've written a custom attribute called AliasAttribute that allows me to define aliases for parameters during model binding. So for example if I have: public JsonResult EmailCheck(string email) on the server and I want the email parameter to be bound to fields named PrimaryEmail or SomeCrazyEmail I can "map" this using the aliasattribute like this: public JsonResult EmailCheck([Alias(Suffix = "Email")]string email).
The problem: In my custom model binder I can't get a hold of the AliasAttribute class applied to the email parameter. It always returns null.
I've seen what the DefaultModelBinder class is doing to get the BindAttribute in reflector and its the same but doesn't work for me.
Question: How do I get this attribute during binding?
AliasModelBinder:
public class AliasModelBinder : DefaultModelBinder
{
public static ICustomTypeDescriptor GetTypeDescriptor(Type type)
{
return new AssociatedMetadataTypeTypeDescriptionProvider(type).GetTypeDescriptor(type);
}
public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var value = base.BindModel(controllerContext, bindingContext);
var descriptor = GetTypeDescriptor(bindingContext.ModelType);
/*************************/
// this next statement returns null!
/*************************/
AliasAttribute attr = (AliasAttribute)descriptor.GetAttributes()[typeof(AliasAttribute)];
if (attr == null)
return null;
HttpRequestBase request = controllerContext.HttpContext.Request;
foreach (var key in request.Form.AllKeys)
{
if (string.IsNullOrEmpty(attr.Prefix) == false)
{
if (key.StartsWith(attr.Prefix, StringComparison.InvariantCultureIgnoreCase))
{
if (string.IsNullOrEmpty(attr.Suffix) == false)
{
if (key.EndsWith(attr.Suffix, StringComparison.InvariantCultureIgnoreCase))
{
return request.Form.Get(key);
}
}
return request.Form.Get(key);
}
}
else if (string.IsNullOrEmpty(attr.Suffix) == false)
{
if (key.EndsWith(attr.Suffix, StringComparison.InvariantCultureIgnoreCase))
{
return request.Form.Get(key);
}
}
if (attr.HasIncludes)
{
foreach (var include in attr.InlcludeSplit)
{
if (key.Equals(include, StringComparison.InvariantCultureIgnoreCase))
{
return request.Form.Get(include);
}
}
}
}
return null;
}
}
AliasAttribute:
[AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public class AliasAttribute : Attribute
{
private string _include;
private string[] _inlcludeSplit = new string[0];
public string Prefix { get; set; }
public string Suffix { get; set; }
public string Include
{
get
{
return _include;
}
set
{
_include = value;
_inlcludeSplit = SplitString(_include);
}
}
public string[] InlcludeSplit
{
get
{
return _inlcludeSplit;
}
}
public bool HasIncludes { get { return InlcludeSplit.Length > 0; } }
internal static string[] SplitString(string original)
{
if (string.IsNullOrEmpty(original))
{
return new string[0];
}
return (from piece in original.Split(new char[] { ',' })
let trimmed = piece.Trim()
where !string.IsNullOrEmpty(trimmed)
select trimmed).ToArray<string>();
}
}
Usage:
public JsonResult EmailCheck([ModelBinder(typeof(AliasModelBinder)), Alias(Suffix = "Email")]string email)
{
// email will be assigned to any field suffixed with "Email". e.g. PrimaryEmail, SecondaryEmail and so on
}
Gave up on this and then stumbled across the Action Parameter Alias code base that will probably allow me to do this. It's not as flexible as what I started out to write but probably can be modified to allow wild cards.
what I did was make my attribute subclass System.Web.Mvc.CustomModelBinderAttribute which then allows you to return a version of your custom model binder modified with the aliases.
example:
public class AliasAttribute : System.Web.Mvc.CustomModelBinderAttribute
{
public AliasAttribute()
{
}
public AliasAttribute( string alias )
{
Alias = alias;
}
public string Alias { get; set; }
public override IModelBinder GetBinder()
{
var binder = new AliasModelBinder();
if ( !string.IsNullOrEmpty( Alias ) )
binder.Alias = Alias;
return binder;
}
}
which then allows this usage:
public ActionResult Edit( [Alias( "somethingElse" )] string email )
{
// ...
}
Example of URL
http_//host/url/unlimited/index?first=value1&second=value2...&anyvalidname=somevalue
I want to have one action accepting unknown in advance amount of params with unknown names. Something like this:
public class UnlimitedController : Controller
{
public ActionResult Index(object queryParams)
{
}
//or even better
public ActionResult Index(Dictionary<string, object> queryParams)
{
}
}
You could create a custom model binder that will convert the querystrings into dictionary.
Custom Model Binder
public class CustomModelBinder: IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
var querystrings = controllerContext.HttpContext.Request.QueryString;
return querystrings.Cast<string>()
.Select(s => new { Key = s, Value = querystrings[s] })
.ToDictionary(p => p.Key, p => p.Value);
}
}
Action
public ActionResult Index([ModelBinder(typeof(CustomModelBinder))]
Dictionary<string, string> queryParams)
{
}
In HomeController.cs
public ActionResult Test()
{
Dictionary<string, string> data = new Dictionary<string, string>();
foreach (string index in Request.QueryString.AllKeys)
{
data.Add(index, Request.QueryString[index]);
}
StringBuilder sb = new StringBuilder();
foreach (var element in data)
{
sb.Append(element.Key + ": " + element.Value + "<br />");
}
ViewBag.Data = sb.ToString();
return View();
}
In Test.cshtml
<h2>Test</h2>
#Html.Raw(ViewBag.Data)
Webpage, http://localhost:35268/Home/Test?var1=1&var2=2, shows:
var1: 1
var2: 2
why dont you keep everything you want inside a single query string parameter and get it on server side as string
then parse the string urself and get what ever you want
something like this
http://example.com?a=someVar&b=var1_value1__var2_value2__var3_value3
then at server side just split the string and get the variables and all the values
if you dont want this then what you can do is that
just call the controller through the url and manually get into the Request.QueryString[] collection and you will get all the variables and there values there
Your controller code could be like
public ActionResult MultipleParam(int a, int b, int c)
{
ViewData["Output"] = a + b + c;
return View();
}
Global.asax.cs
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
"Parameter",
"{controller}/{action}/{a}/{b}/{c}",
new { controller = "Home", action = "MultipleParam", a = 0, b = 0, c = 0 }
);
}
If the route is {controller}/{action}/{id}/{page}, then /Home/MultipleParam/101/1?showComments=true, then the retrieval mechanism would be:
public ActionResult MultipleParam(string id /* = "101" */, int page /* = 1 */, bool showComments /* = true */) { }
Another possible solution is to create custom Route
public class ParamsEnabledRoute : RouteBase
{
private Route route;
public ParamsEnabledRoute(string url)
{
route = new Route(url, new MvcRouteHandler());
}
public override RouteData GetRouteData(HttpContextBase context)
{
var data = route.GetRouteData(context);
if (data != null)
{
var paramName = (string)data.Values["paramname"] ?? "parameters";
var parameters = context.Request.QueryString.AllKeys.ToDictionary(key => key, key => context.Request.QueryString[key]);
data.Values.Add(paramName, parameters);
return data;
}
return null;
}
public override VirtualPathData GetVirtualPath(RequestContext context, RouteValueDictionary rvd)
{
return route.GetVirtualPath(context, rvd);
}
}
Usage:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.Add(new ParamsEnabledRoute("ParamsEnabled/{controller}/{action}/{paramname}"));
}
Controller:
public class HomeController : Controller
{
public ActionResult Test(Dictionary<string, string> parameters)
{
}
}
URL:
http://localhost/ParamsEnabled/Home/Test/parameteres?param1=value1¶m2=value2
Route attribute:
public class RouteDataValueAttribute : ActionMethodSelectorAttribute
{
private readonly RouteDataValueAttributeEnum type;
public RouteDataValueAttribute(string valueName)
: this(valueName, RouteDataValueAttributeEnum.Required)
{
}
public RouteDataValueAttribute(string valueName, RouteDataValueAttributeEnum type)
{
this.type = type;
ValueName = valueName;
}
public override bool IsValidForRequest(ControllerContext controllerContext, MethodInfo methodInfo)
{
if (type == RouteDataValueAttributeEnum.Forbidden)
{
return controllerContext.RouteData.Values[ValueName] == null;
}
if (type == RouteDataValueAttributeEnum.Required)
{
return controllerContext.RouteData.Values[ValueName] != null;
}
return false;
}
public string ValueName { get; private set; }
}
public enum RouteDataValueAttributeEnum
{
Required,
Forbidden
}
Just use HttpContext to gather your query string.
using System.Web;
public class UnlimitedController : Controller
{
public ActionResult Index(object queryParams)
{
}
//or even better
public ActionResult Index()
{
NameValueCollection queryString = HttpContext.Request.QueryString;
// Access queryString in the same manner you would any Collection, including a Dictionary.
}
}
The question asked "How to create ASP.NET MVC controller accepting unlimited amount of parameters from query string"? Any controller will accept unlimited amount of parameters as a NamedValueCollection.