I need to get all areas that has been registered as list and all of their controllers as a sub list and the same thing for actions. something like this:
AdminArea
HomeController
Index
Add
...
OtherController
...
AnotherArea
HomeController
Index
...
...
I have checked the answer of this question, and this one, but they are not what i'm looking for.
The first one return all the routes that has been registered and the second one return all controllers at once.
Update
Ok, with the below code i can get all the areas and with the answer of the second question i can get all the controllers, but i can't figure it out each controller belong to what area.
var areaNames = RouteTable.Routes.OfType<Route>()
.Where(d => d.DataTokens != null && d.DataTokens.ContainsKey("area"))
.Select(r => r.DataTokens["area"]).ToList()
.Distinct().ToList();
So here is what i came up with, it's exactly what i wanted.
I hope it will be helpful.
public virtual ActionResult Index()
{
var list = GetSubClasses<Controller>();
// Get all controllers with their actions
var getAllcontrollers = (from item in list
let name = item.Name
where !item.Name.StartsWith("T4MVC_") // I'm using T4MVC
select new MyController()
{
Name = name.Replace("Controller", ""), Namespace = item.Namespace, MyActions = GetListOfAction(item)
}).ToList();
// Now we will get all areas that has been registered in route collection
var getAllAreas = RouteTable.Routes.OfType<Route>()
.Where(d => d.DataTokens != null && d.DataTokens.ContainsKey("area"))
.Select(
r =>
new MyArea
{
Name = r.DataTokens["area"].ToString(),
Namespace = r.DataTokens["Namespaces"] as IList<string>,
}).ToList()
.Distinct().ToList();
// Add a new area for default controllers
getAllAreas.Insert(0, new MyArea()
{
Name = "Main",
Namespace = new List<string>()
{
typeof (Web.Controllers.HomeController).Namespace
}
});
foreach (var area in getAllAreas)
{
var temp = new List<MyController>();
foreach (var item in area.Namespace)
{
temp.AddRange(getAllcontrollers.Where(x => x.Namespace == item).ToList());
}
area.MyControllers = temp;
}
return View(getAllAreas);
}
private static List<Type> GetSubClasses<T>()
{
return Assembly.GetCallingAssembly().GetTypes().Where(
type => type.IsSubclassOf(typeof(T))).ToList();
}
private IEnumerable<MyAction> GetListOfAction(Type controller)
{
var navItems = new List<MyAction>();
// Get a descriptor of this controller
ReflectedControllerDescriptor controllerDesc = new ReflectedControllerDescriptor(controller);
// Look at each action in the controller
foreach (ActionDescriptor action in controllerDesc.GetCanonicalActions())
{
bool validAction = true;
bool isHttpPost = false;
// Get any attributes (filters) on the action
object[] attributes = action.GetCustomAttributes(false);
// Look at each attribute
foreach (object filter in attributes)
{
// Can we navigate to the action?
if (filter is ChildActionOnlyAttribute)
{
validAction = false;
break;
}
if (filter is HttpPostAttribute)
{
isHttpPost = true;
}
}
// Add the action to the list if it's "valid"
if (validAction)
navItems.Add(new MyAction()
{
Name = action.ActionName,
IsHttpPost = isHttpPost
});
}
return navItems;
}
public class MyAction
{
public string Name { get; set; }
public bool IsHttpPost { get; set; }
}
public class MyController
{
public string Name { get; set; }
public string Namespace { get; set; }
public IEnumerable<MyAction> MyActions { get; set; }
}
public class MyArea
{
public string Name { get; set; }
public IEnumerable<string> Namespace { get; set; }
public IEnumerable<MyController> MyControllers { get; set; }
}
For getting actions, i used this answer.
If you have any better ways, please let me know.
Related
I have two DbSets:
public DbSet<Reports.Models.Application> Application { get; set; }
public DbSet<Reports.Models.Category> Category { get; set; }
In the controller, I'm creating two List<SelectListItem>s:
var applications = _context.Application
.Select(listItem => new SelectListItem
{
Value = listItem.ID,
Text = listItem.Name
}
).ToList();
var categories = _context.Category
.Select(listItem => new SelectListItem
{
Value = listItem.ID,
Text = listItem.Name
}
).ToList();
I'd like to refactor this into a single, private method:
private List<SelectListItem> SelectList<T>(bool blankListItem = false)
{
var selectListItems = _context.<T> <------ doesn't compile
.Select(listItem => new SelectListItem
{
Value = listItem.ID,
Text = listItem.Name
}
).ToList();
if (blankListItem)
selectListItems.Insert(0, (new SelectListItem { Text = $"Choose {{T.ToString}}", Value = "" }));
return selectListItems;
}
And call it twice:
var applications = SelectList<Application>();
var categories = SelectList<Category>();
or
var applications = SelectList<Application>(true); // add "choose"
var categories = SelectList<Category>(true); // add "choose"
What's the right way to define the _context.<T> part? Perhaps this should be an extension method of the DbSet instead?
Maybe you can have your dbsets inherit a base class. which would be representing the generic type T.
Something like;
public class BaseClassForDbSets
{
public int Id { get; set; }
public string Name { get; set; }
}
public class Application : BaseClassForDbSets
{
}
public class Category : BaseClassForDbSets
{
}
and then your private method;
private IEnumerable<SelectListItem> GetSelectList<T>(IEnumerable<T> dataSource, bool blankListItem = false) where T : BaseClassForDbSets
{
var selectListItems = dataSource
.Select(listItem => new SelectListItem
{
Value = listItem.Id.ToString(),
Text = listItem.Name
}
).ToList();
if (blankListItem)
selectListItems.Insert(0, (new SelectListItem { Text = $"Choose {nameof(T)}", Value = "" }));
return selectListItems;
}
Then you would call it like;
var applicationCollection = GetSelectList(_context.Application);
var categoryCollection = GetSelectList(_context.Category);
Do note - not tested
My solution uses a different approach, but same result.
Start with an interface:
public interface IBaseSelectItem
{
int Id { get; set; }
string Name { get; set; }
}
Have your entities (Application and Category) implement the interface:
public partial class Category : IBaseSelectItem
{
public int Id { get; set; }
public string Name { get; set; }
}
Create an extension on DbSet:
public static IList<SelectListItem> AsSelectList<T>(this DbSet<T> dbSet, bool useChooseValueOption) where T : class, IBaseSelectItem
{
var selectList = dbSet
.Select(c => new SelectListItem { Value = c.Id.ToString(), Text = c.Name })
.ToList();
if (useChooseValueOption)
selectList.Insert(0, new SelectListItem { Value = "0", Text = "-Choose Value-" });
return selectList;
}
Then use like this:
var categoriesSelectList = _dbContext.Categories.AsSelectList();
i have table looks like below
ID | Reason | PrID
-----------------
1 abc null
2 dhe null
3 aerc 1
4 dwes 2
5 adfje 1
i have class
public class Reason
{
public int Id { get; set; }
public string Reson{ get; set; }
public List<SecondryReason> SecReason{ get; set; }
public int? PrimaryId { get; set; }
}
public class SecondryReason
{
public int Id { get; set; }
public string Reason { get; set; }
public int PrimaryReasonId { get; set; }
}
I want this to be displayed in hierarchy level
if the prid is Null need to treat this as the parent remaining all child
i am trying Linq and unable to achieve this
Suggest me how to do this in an easy way in linq
So: You have a list/enumerable of type , whereof the SecReason List property is null. Then, using linq you want a list, were the only the "root" reasons remain, but the Sub-reasons got put in the lists, but as type SecondaryReason?
If so, I found this way to do it (linq and foreach):
static IEnumerable<Reason> GetReasonsGrouped(List<Reason> reasons)
{
var result = reasons.Where(x => x.PrimaryId == null);
foreach (var item in result)
{
item.SecReason = reasons.Where(x => x.PrimaryId == item.Id)
.Select(x => new SecondryReason()
{ Id = x.Id,
ReasonName = x.ReasonName,
PrimaryReasonId = item.Id
})
.ToList();
}
return result;
}
Or just linq, but harder to read:
var result = reasons.Where(x => x.PrimaryId == null)
.Select(x =>
{
x.SecReason = reasons.Where(r => x.PrimaryId == x.Id)
.Select(r => new SecondryReason()
{
Id = r.Id,
ReasonName = x.ReasonName,
PrimaryReasonId = x.Id
})
.ToList();
return x;
});
Not sure if linq will be the best solution, here is my proposed changes and method to get an Hierarchy type:
public class Reason
{
public int Id { get; set; }
public string Reson { get; set; }
public List<Reason> SecReason { get; set; }
public int? PrimaryId { get; set; }
//Adds child to this reason object or any of its children/grandchildren/... identified by primaryId
public bool addChild(int primaryId, Reason newChildNode)
{
if (Id.Equals(primaryId))
{
addChild(newChildNode);
return true;
}
else
{
if (SecReason != null)
{
foreach (Reason child in SecReason)
{
if (child.addChild(primaryId, newChildNode))
return true;
}
}
}
return false;
}
public void addChild(Reason child)
{
if (SecReason == null) SecReason = new List<Reason>();
SecReason.Add(child);
}
}
private List<Reason> GetReasonsHierarchy(List<Reason> reasons)
{
List<Reason> reasonsHierarchy = new List<Reason>();
foreach (Reason r in reasons)
{
bool parentFound = false;
if (r.PrimaryId != null)
{
foreach (Reason parent in reasonsHierarchy)
{
parentFound = parent.addChild(r.PrimaryId.Value, r);
if (parentFound) break;
}
}
if (!parentFound) reasonsHierarchy.Add(r);
}
return reasonsHierarchy;
}
I am calling a API method that is returning some question and answer as List. I need show this list in View, not sure how to add value to the faq list. As I am sending this List that is part of Model to the View to show in on the screen.
Inside the foreach loop is where I have to add value of web api to the faq List.
This is my method which is returning the Model.
[HttpGet]
public async Task<ActionResult> ShowContact(int loanId)
{
HelpCenterViewModel helpCenterViewModel = new HelpCenterViewModel();
helpCenterViewModel.ContactInfo.loanId = loanId;
string json = string.Empty;
List<Faq> FaqObject = null;
var responseApi = await httpClient.GetAsync(string.Format("{0}/{1}",
CommonApiBaseUrlValue, "faqs"));
if (responseApi.IsSuccessStatusCode)
{
json = responseApi.Content.ReadAsStringAsync().Result;
FaqObject = new JavaScriptSerializer().Deserialize<List<Faq>>(json);
}
var response = new
{
success = FaqObject != null,
data = FaqObject
};
foreach (var faqitem in response.data)
{
//This is where I dont know how to add to faq list.
//helpCenterViewModel.Faq.Answer = faqitem.Answer;
//helpCenterViewModel.Faq.Category = faqitem.Category;
}
return View(helpCenterViewModel);
}
This is the Model that I am retunign it to view:
public class HelpCenterViewModel
{
public List<Faq> Faq { get; set; }
public ContactUsInfo ContactInfo { get; set; }
public HelpCenterViewModel()
{
this.Faq = new List<Faq>();
this.ContactInfo = new ContactUsInfo();
}
}
and this is the faq class:
public class Faq
{
public int Id { get; set; }
public string Category { get; set; }
public string Question { get; set; }
public string Answer { get; set; }
}
and this is my view:
#model IEnum erable<Carfinance.Loans.Web.ViewModels.HelpCenterViewModel>
#foreach (var item in Model)
{
<li>#Html.DisplayFor(faq => item.Faq)</li>
}
But It gave me this error.
The 'DelegatingHandler' list is invalid because the property 'InnerHandler' of 'CorsMessageHandler' is not null.
Parameter name: handlers
You need to create a new object for each of your items and add them to your list. This can be done in various ways, depending on how verbose you want your implementation to be:
foreach (var faqitem in response.data)
{
var faq = new Faq();
faq.Answer = faqitem.Answer;
faq.Category = faqitem.Category;
helpCenterViewModel.Faq.Add(faq);
}
OR
foreach (var faqitem in response.data)
helpCenterViewModel.Faq.Add(new Faq()
{
Answer = faqitem.Answer;
Category = faqitem.Category;
});
OR
helpCenterViewModel.Faq = response.data.Select(x => new Faq {
Answer = x.Answer,
Category = x.Category
}).ToList();
Cleaned up the code some, but you already have a List<Faq>, so just assign it to your model.
[HttpGet]
public async Task<ActionResult> ShowContact(int loanId)
{
string json = string.Empty;
List<Faq> FaqObject = null; // Should probably be new List<Faq>
var responseApi = await httpClient.GetAsync(string.Format("{0}/{1}", CommonApiBaseUrlValue, "faqs"));
if (responseApi.IsSuccessStatusCode)
{
json = responseApi.Content.ReadAsStringAsync().Result;
FaqObject = new JavaScriptSerializer().Deserialize<List<Faq>>(json);
}
var response = new
{
success = FaqObject != null,
data = FaqObject
};
return View(new HelpCenterViewModel
{
ContactInfo=new ContactInfo {loanId},
Faq=FaqObject
});
}
Not sure what you were doing with the response variable, so I just left it there, but it appears to do nothing useful and could be removed as well. Then you'd have this:
[HttpGet]
public async Task<ActionResult> ShowContact(int loanId)
{
var responseApi = await httpClient.GetAsync(string.Format("{0}/{1}", CommonApiBaseUrlValue, "faqs"));
if (responseApi.IsSuccessStatusCode)
{
return View(new HelpCenterViewModel
{
ContactInfo=new ContactInfo {loanId},
Faq=new JavaScriptSerializer().Deserialize<List<Faq>>(
responseApi.Content.ReadAsStringAsync().Result)
});
}
return View(new HelpCenterViewModel
{
ContactInfo=new ContactInfo {loanId},
Faq=new List<Faq>()
});
}
well, the Faq property on HelpCenterViewModel is really a List<Faq> (kind of misleading naming you have there), so use the Add method:
foreach (var faqitem in response.data)
{
var faq = new Faq();
faq.Answer = faqitem.Answer;
faq.Category = faqitem.Category;
helpCenterViewModel.Faq.Add(faq);
//^ this Faq is a List
}
You should pluralize your List<Faq>'s name to Faqs to prevent confusing yourself.
i want to call Arraylist in view. I will explain my issue clearly.
My Controller Code
public ActionResult customerid()
{
List<Customer> n = (from c in db.Customers where c.IsDeleted == false select c).ToList();
var customertype = string.Empty;
for (var i = 0; i < n.Count; i++)
{
var objCustomerName = n[i].DisplayName;
var objCustomerID = n[i].CustomerID;
var objCusCreatedDate=n[i].CreatedDate;
var objNextDate = objCusCreatedDate.GetValueOrDefault().AddDays(120);
var salescount = (from sc in db.SalesOrders where sc.CustomerID==objCustomerID && sc.CreatedDate >= objCusCreatedDate && sc.CreatedDate<= objNextDate select sc.SalesOrderID).Count();
if (salescount <= 3&& salescount> 0)
{
customertype = "Exisiting Customer";
}
else if (salescount >= 3)
{
customertype = "Potential Customer";
}
else
{
customertype = "New Customer";
}
ArrayList obj = new ArrayList();
{
obj.Add(new string[] { objCustomerName, customertype, salescount.ToString()});
}
var details = obj;
}
return View();
}
My View Model
public class CustomerTypeViewModel
{
public System.Guid CustomerID { get; set; }
public string CustomerName { get; set; }
public DateTime CreatedDate { get; set; }
public string SalesCount { get; set; }
public string CustomerType { get; set; }
}
I want to call this array list in view. How I do that? That is i am generating one view based on controller code I need output same as like which is mentioned in the below image .
Wanted Output
Wanted Output
So i put all the fields (which i going to give as a column in View) in Array list. Now i want to call that Arraylist
obj.Add(new string[] { objCustomerName, customertype, salescount.ToString()});
in view . How I do that? I tried to explain my issue as per my level best. please understand my problem and tell me one solution. I am new to MVC so please help me to solve this problem.
In your controller:
List<CustomerTypeViewModel> obj = new List<CustomerTypeViewModel>();
obj.Add(new CustomerTypeViewModel(){
CustomerName = objCustomerName,
CustomerType = customertype,
SalesCount = salescount.ToString()
});
return View(obj);
In your view
#model IEnumerable<CustomerTypeViewModel>
and display values like this
#if (Model.Any()) {
foreach (var m in Model) {
#Html.DisplayFor(x => m.CustomerName)
#Html.DisplayFor(x => m.CustomerType)
}
}
I have a collection of strings:
"Alberton;Johannesburg"
"Allendale;Phoenix"
"Brackenhurst;Alberton"
"Cape Town;"
"Durban;"
"Johannesburg;"
"Mayville;Durban"
"Phoenix;Durban"
"Sandton;Johannesburg"
that I want to structure into a hierarchical structure in the fastest possible manner, like:
Johannesburg
Alberton
Brackenhurst
Sandton
Cape Town
Durban
Phoenix
Allandale
Mayville
Currently I have nested for loops and checks, but was hoping I could achieve this with a single LAMBDA query?
The above mentioned strings are in a List.
I prepared lambda-like solution, but you should really think if it's more readable/efficient then your current one:
Helper Extension Method:
public static class ChildrenGroupExtensions
{
public static List<CityInfo> GetChildren(this IEnumerable<IGrouping<string, City>> source, string parentName)
{
var cities = source.SingleOrDefault(g => g.Key == parentName);
if (cities == null)
return new List<CityInfo>();
return cities.Select(c => new CityInfo { Name = c.Name, Children = source.GetChildren(c.Name) }).ToList();
}
}
Helper Classes:
public class City
{
public string Name { get; set; }
public string Parent { get; set; }
}
public class CityInfo
{
public string Name { get; set; }
public List<CityInfo> Children { get; set; }
}
Usage:
var groups = (from i in items
let s = i.Split(new[] { ';' })
select new City { Name = s[0], Parent = s[1] }).GroupBy(e => e.Parent);
var root = groups.GetChildren(string.Empty);
Where items is your List<string>
You can look the results with simple helper method like that one:
private static void PrintTree(List<CityInfo> source, int level)
{
if (source != null)
{
source.ForEach(c =>
{
Enumerable.Range(1, level).ToList().ForEach(i => Console.Write("\t"));
Console.WriteLine(c.Name);
PrintTree(c.Children, level + 1);
});
}
}
And the results are:
Cape Town
Durban
Mayville
Phoenix
Allendale
Johannesburg
Alberton
Brackenhurst
Sandton
You haven't specified any specific data structure so I just used a class called Area with a list of children of itself. Also, it's in 2 lines of linq. There is also no check to see if an area is a child of 2 separate parents as the code is. Here's the code for the test I used(Relevant lines in-between the equals comments):
[TestFixture]
public class CitiesTest
{
[Test]
public void Test()
{
var strings = new List<string>
{
"Alberton;Johannesburg",
"Allendale;Phoenix",
"Brackenhurst;Alberton",
"Cape Town;",
"Durban;",
"Johannesburg;",
"Mayville;Durban",
"Phoenix;Durban",
"Sandton;Johannesburg"
};
//===================================================
var allAreas = strings.SelectMany(x=>x.Split(';')).Where(x=>!string.IsNullOrWhiteSpace(x)).Distinct().ToDictionary(x=>x, x=>new Area{Name = x});
strings.ForEach(area =>
{
var areas = area.Split(';');
if (string.IsNullOrWhiteSpace(areas[1]))
return;
var childArea = allAreas[areas[0]];
if (!allAreas[areas[1]].Children.Contains(childArea))
allAreas[areas[1]].Children.Add(childArea);
childArea.IsParent = false;
});
var result = allAreas.Select(x=>x.Value).Where(x => x.IsParent);
//===================================================
}
public class Area
{
public string Name;
public bool IsParent;
public List<Area> Children { get; set; }
public Area()
{
Children = new List<Area>();
IsParent = true;
}
}
}