I have created a class called Activity with properties as below:
public string Name { get; set; }
public DateTime ActivityDate { get; set; }
public decimal Cost { get; set; }
private string _description;
public string Description
{
get { return Description; }
set { _description = value; }
}
// Enum that we will use for filtering later on
public ActivityType TypeOfActivity { get; set; }
I display the objects on a listbox which you can add over and back and one requirement is that you add a running cost of the list. I have three lists
List<Activity> activityList = new List<Activity>();
List<Activity> selectedList = new List<Activity>();
List<Activity> filteredList = new List<Activity>();
Screen shot:
I was wondering what way would I be fit to access the Cost property in the list selectedList so I could maybe calculate them in a foreach loop.
Or maybe there would be a more appropriate way of doing so. I have had a fair read through a few articles but with no avail.
Using LINQ Sum
decimal totalCost = selectedList.Sum(activity => activity.Cost);
Related
Is there a way to sort a list box on one field then another?
(I saw the other posts but I think this is a bit more involved). I could do this the long way but thought there was a faster shorthand version I just wasn't aware of.
Basically this reads a directory for all the folders in it with the format of:
DATENAME
I parse out the name from the date. I need to organize these by name THEN by date (the second filter is what is tripping me up).
So a folder of:
12012016TULLY
1202019LAVA
2202018LAVA
5162019CLOUD
5202020LAVA
would look like
5162019CLOUD
2202018LAVA
1202019LAVA
5202020LAVA
12012016TULLY
So this is what I have:
class MyListBoxItem
{
public string StudyBaseFolder { get; set; }
public string StudyName { get; set; }
public string UserLastName { get; set; }
public string StudyDate { get; set; }
}
List<MyListBoxItem> studiesAndFolders = new List<MyListBoxItem>();
//later int he code i build a list of studyNames (which is a path and I pasre the path here too)
foreach (string sn in studyName)
{
//get user name
String lastName = getLastName(sn);
String theDate = getDate(sn);
//can I organize this based on the LAST NAME THEN THE DATE
studiesAndFolders.Add(new MyListBoxItem { StudyBaseFolder = path, StudyName = sn, UserLastName = lastName, StudyDate = theDate });
}
Then I finally add this to the listbox.
listDirectories.Items.Clear();
//I do it this way so a double click on an item gets the object back and I can do things with it.
foreach(MyListBoxItem direc in studiesAndFolders)
{
listDirectories.Items.Add(direc);
}
listbox.sorted=true didn't help, and I am sure there might be an expression (LINQ to the rescue?). I was just going to do it the long way with a ton of cases when I take the studiesAndFolders and put it to the list.
This code sorts by name, then by date. And should be easy to read.
foreach(MyListBoxItem direc in studiesAndFolders.OrderBy(x => x.StudyName).ThenBy(x => x.StudyDate))
{
listDirectories.Items.Add(direc);
}
As others have noted, you should be storing the StudyDate as a DateTime unless you want it sorted alphabetically.
Firstly, change type of StudyDate to DateTime
class MyListBoxItem
{
...
public DateTime StudyDate { get; set; }
}
After, create new comparer
public class MyListBoxItemComparer : IComparer<MyListBoxItem>
{
public int Compare(MyListBoxItem x, MyListBoxItem y)
{
if (x.StudyName == y.StudyName)
{
return x.StudyDate.CompareTo(y.StudyDate);
}
return String.Compare(x.StudyName, y.StudyName, StringComparison.Ordinal);
}
}
Finally, use SortedSet instead of List
SortedSet<MyListBoxItem> studiesAndFolders = new SortedSet<MyListBoxItem>(new MyListBoxItemComparer());
For ordering based on the date correctly you need StudyDate to be of type DateTime
class MyListBoxItem
{
public string StudyBaseFolder { get; set; }
public string StudyName { get; set; }
public string UserLastName { get; set; }
public DateTime StudyDate { get; set; }
}
Then you can order by using LINQ extension methods.
var orderedDirectories =
directories.OrderBy(dir => dir.StudyName)
.ThenBy(dir => dir.StudyDate);
foreach (var directory in orderedDirectories)
{
listBox.Items.Add(directory);
}
You can override .ToString() method in MyListBoxItem class that listbox will display items as you want.
class MyListBoxItem
{
public string StudyBaseFolder { get; set; }
public string StudyName { get; set; }
public string UserLastName { get; set; }
public DateTime StudyDate { get; set; }
public override string ToString()
{
return $"{StudyDate:MMddyyyy}{StudyName}";
}
}
If you can use LINQ in your project, first you should make StudyDate type of DateTime. Then you could do this:
MyList.OrderBy(x => x.StudyName).ThenByDescending(x=>x.StudyDate).ToList()
I have a list created from a stored procedure using EF6.0
I have also created 3 classes
public class Resas
{
public string todo{ get; set; }
public string prop { get; set; }
public string Code { get; set; }
public string statusCode { get; set; }
public string checkin { get; set; }
public string checkout { get; set; }
public List<profiles> profiles { get; set; }
}
public class profiles
{
public string action { get; set; }
public string id { get; set; }
public string profileType { get; set; }
public string title { get; set; }
public string firstName { get; set; }
public string middleName { get; set; }
public string lastName { get; set; }
public List<emailAddresses> emailAdresses { get; set; }
}
public class emailAddresses
{
public string emailAddress { get; set; }
public string emailAddress2 { get; set; }
}
I am doing a for-loop in the list and I need to get certain columns and put it in the array (I will put two, to keep it simple)
myEntities db = new myEntities();
List<rev_Result> revList = new List<rev_Result>();
revList.Clear();
revList = db.rev().ToList();
for (int i = 0; i < revList.Count(); i++)
{
Resas resas = new Resas();
profiles[] profiles = new profiles[1];
resas.todo = revList[i].todo;
resas.profiles[0].lastName = revList[i].lastName;
}
I am not familiar with C# as you can see from the psedo-code above.
I cannot figure out how to feed the Resas with data and then its Profile with data and then move to the next Resas entry.
Any help appreciated.
That's fairly simple using Linq:
Resas resas = new Resas();
resas.profiles = revList
.Select(x => new profiles() { action = x.todo, lastName = x.lastName })
.ToList();
What's happening here is: You loop through every entry in revList and get your wanted data structure (that's what Select is doing). x refers to the current entry in the loop, while the stuff to the right side of the arrow is you 'output': a new instance of your profiles class with the members assigned accordingly. The result of all of this is then converted to a list (before ToList(), think of it as a recipe to create the list) and assigned to resas.profiles.
By the way, a word on conventions: Usually, in C#, you would give your classes a name that starts with a capital letter. Also, your profiles class seems to contain data of exactly one profile, so a better name might be Profile. This also makes your data structure more clear, since List<profiles> seems to be a list of lists of profiles - but that's not what it actually is, is it?
Furthermore, Members generally start with a capital letter as well, so instead of action, lastName, you'd have: Action and LastName.
You can try with Linq. This is the code that should solve your issue, but Resas class doesn't have action property:
List<Resas> ls = revList.Select(x => new Resas() {
action = x.todo,
profiles = new List<profiles>() {
new profiles { lastName = x.lastName }
}
).ToList();
If you need to use action property of inprofiles` class:
List<Resas> ls = revList.Select(x => new Resas() {
profiles = new List<profiles>() {
new profiles {
action = x.todo,
lastName = x.lastName
}
}
).ToList();
I have 3 models
public class Payroll
{
public int ID { get; set; }
public DateTime Date { get; set; }
public int PayCategoryID { get; set; }
public virtual PayCategory PayCategory { get; set; }
}
this one:
public class PayCategory
{
public int ID { get; set; }
public string PayScenario { get; set; }
public int PayGroupID { get; set; }
public virtual PayGroup PayGroup { get; set; }
}
and this one:
public class PayGroup
{
public int ID { get; set; }
public string Label { get; set; }
public string Description { get; set; }
public string EntryType { get; set; }
}
If I create a List of Payroll I will only get a list of Payroll objects with 4 properties each.
I want a list of , where each Payroll object will have the fields
Date, PayScenario, Label, Description, and EntryType. I know these can be easily obtained by
Payroll.PayCategory.PayScenario
Payroll.PayCategory.PayGroup.Label
etc.
But I am exporting these to an excel document using this generic method:
public static void Export(List<T> data, string name, Controller controller)
{
XLWorkbook workbook = new XLWorkbook();
var worksheet = workbook.Worksheets.Add(name);
worksheet.Cell(1, 1).InsertTable(data);
controller.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheet.sheet";
controller.Response.AddHeader("content-disposition", String.Format(#"attachment;filename={0}.xlsx", name.Replace(" ", "_")));
using (MemoryStream memoryStream = new MemoryStream())
{
workbook.SaveAs(memoryStream);
memoryStream.WriteTo(controller.Response.OutputStream);
memoryStream.Close();
}
controller.Response.End();
}
I call from controller like this:
public ActionResult ExportData()
{
var payrolls = (List<Payroll>)Session["payrolls"];
ExportToExel<Payroll>.Export(payrolls, "Payroll", this);
return RedirectToAction("Index");
}
And the results of course give me a simple table with only the value Date in it, (plus some other trash columns like System [...] PayCategory)
Ultimately, I want the properties of these 3 models to be merged (excluding ID's) to give me a single list that I can pass on to the ExportData method. As in, is there a way to add a column to a list of objects? Something similar to
for(int i = 1; i<payrolls.Count; i++)
payrolls[i].Add.(payrolls[i].PayCategory.PayScenario);
which of course, doesn't work.
Please don't ask why I don't simply have one model instead of these 3. It's not an option unless I want to hard code values.
Thanks
If you can import Linq, you can do something like:
var payrolls = from aPayroll in (List<Payroll>)Session["payrolls"]
select new {
Date = aPayroll.Date,
PayScenario = aPayroll.PayCategory.PayScenario,
Label = aPayroll.PayGroup.Label,
Description = aPayroll.PayGroup.Description,
EntryType = aPayroll.PayGroup.EntryType
};
That would create an anonymous type with the five properties you want.
Assuming you're using ClosedXML, you should also be able to create a DataTable and send it directly to a worksheet.
What you are looking for is an "Anonymous Object".
Example usage:
var anonymousObject = new
{
ID = payrollObj.Id,
// other payroll properties
PayScenario = payrollObj.PayCategory.PayScenario
// other extended properties
};
Here's an article about them
http://www.c-sharpcorner.com/UploadFile/ff2f08/anonymous-types-in-C-Sharp/
The suggestion here is to create a new anonymous object within your loop and pass that onto your excel function instead of the original payrollObject.
I have some data coming back from a web service, which I have mapped to the following classes:
public class Webinar {
public string Title { get; set; }
public string Description { get; set; }
...
public List<TimeZone> TimeZones { get; set; }
}
public class TimeZone {
public TimeSpan GmtOffset { get; set; }
public List<Session> Session { get; set; }
}
public class Session {
public int WebinarKey { get; set; }
public DateTime StartTime { get; set; }
public TimeSpan Duration { get; set; }
}
Hopefully it's fairly clear what is going on: any one webinar can have multiple time zones which in turn holds the individual sessions.
I have a list of webinars List<Webinar> webinars = ... which is populated with data. On the page I would like to present webinars grouped by time zone (easy) and then sorted by their start time.
My problem: the sessions are not necessarily ordered by StartTime when I receive the data, which I would like to do. I have the following code which does work, but recreating each object and mapping out all it's properties is a PITA, is there a nicer way to do what I want?
List<Webinar> webinarsWithOrderedSessions = new List<Webinar>();
foreach (Webinar webinar in mappedWebinars)
{
Webinar currentWebinar = new Webinar
{
Title = webinar.Title,
...
TimeZones = new List<TimeZone>()
};
foreach (Webinar.TimeZone timeZone in webinar.TimeZones)
{
Webinar.TimeZone currentTimeZone = new TimeZone
{
Location = timeZone.Location,
Sessions = new List<Session>()
};
currentTimeZone.Sessions = timeZone.Sessions.OrderBy(session => session.StartTime).ToList();
currentWebinar.TimeZones.Add(currentTimeZone);
}
webinarsWithOrderedSessions.Add(currentWebinar);
}
UPDATE
Building upon the suggestion by #Max, why might this bit of code not work? It doesn't seem to add the sessions at all. I don't necessarily need two properties, so I thought I'd just apply your suggestion directly to the main property.
public class TimeZone
{
private List<Session> _sessions;
public List<Session> Sessions
{
get { return _sessions.OrderBy(s => s.StartTime).ToList(); }
set { _sessions = value; }
}
}
You can try with this:
public class TimeZone
{
private List<Session> _ordered;
public TimeSpan GmtOffset { get; set; }
public List<Session> Session
{
get
{
return this._ordered;
}
set
{
if (value != null)
{
this._ordered = value.OrderBy(p => p.StartTime);
}
}
}
}
I has improved the answer using explicit set and get
Try this way:
var webinarsWithOrderedSessions = (from x in mappedWebinars
from y in x.TimeZones
from s in y.Session
orderby s.StartTime
select x).ToList();
I am trying to create a list of Queues that are displayed by Queue Category. Each Queue Category is assigned an Enum value as such.
public enum QueueCategory
{
None=0,
Critical=1,
High=2,
Orphaned=3,
Missing=4
}
And for each Category, I want to then display these fields.
public class QueueInformation
{
public string Name { get; set; }
public Decimal PercentOfThreshold { get; set; }
public string Host { get; set; }
public DateTime OldestArrival { get; set; }
public QueueCategory Category { get; set; }
}
}
How would I go about linking these two pages so that QueueInformation is displayed by QueueCategory?
IEnumerable<QueueInformation> infos = ...;
foreach (var categoryGroup in infos.GroupBy(i => i.Category))
{
Console.WriteLine("Current category: {0}", categoryGroup.Key);
foreach (var queueInfo in categoryGroup)
{
Console.WriteLine(queueInfo.Name /*...*/);
}
Console.WriteLine("==========================");
}
I assume you want a source ordered by the QueueCategory:
IEnumerable<QueueInformation> list = new BindingList<QueueInformation>();
var orderedList = from l in list orderby l.Category select l;
Hope this helps