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Array of Objects to String - ASP.NET C# [closed]

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Trying to convert Array of Objects to String using C#. Able to achieve the same using LINQ, however trying to make use of reusable functions which would accept array of Objects and return back string. Understand that generics must be used but it's been hard time understanding it. Thanks in advance!
public class HelloWorld {
public static void Main() {
Root root = new Root();
List<A> obj = new List<A>();
obj.Add(new A() { Code = "WAY"});
obj.Add(new A() { Code = "DOWN"});
obj.Add(new A() { Code = "WE"});
obj.Add(new A() { Code = "GO"});
root.A = obj;
string _Result = string.Join("-", root.A.Where(x => x.Code != "").Select(p => p.Code.ToString()).ToArray());
Console.WriteLine(_Result); //Expected OP: WAY-DOWN-WE-GO
Console.WriteLine(Utility.ToArray(root.A)); //System.Collections.Generic.List`1[A]
}
//Trying for much simpler Generic function here.
public class Utility{
public static string ToArray(IList<Object> obj){
foreach(var v in obj){
//generic function..
}
StringBuilder sb = new StringBuilder();
return sb.ToString();
}
}
}
public class Root
{
public List<A> A { get; set; }
public List<B> B { get; set; }
}
public class A
{
public string Code { get; set; }
}
public class B
{
public string Mode { get; set; }
}

If you're looking for a system that works without having to have your classes implement an interface (for objects you didn't create, for example), it's possible to use a Func<T, object> to select a specific property/field:
// IEnumerable is more generic over "lists" (sets, maps, etc)
// \/
public static string ToArray<T>(IEnumerable<T> obj, Func<T, object> func) {
return string.Join('-', obj.Select(func));
}
Usage example:
List<A> aObjects = new();
//add aObjects
List<B> bObjects = new();
//add bObjects
Console.WriteLine(Utilities.ToArray(aObjects, a => a.Code));
Console.WriteLine(Utilities.ToArray(bObjects, b => b.Mode));
Reference: How to join as a string a property of a class?

Conver binary tree to MenuStrip [closed]

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I have a List<MenuReponse> menus like:
How can I convert it to MenuStrip when I load the Form like:

It's simply using recursion with data structure logic. Before going to answer the question, I have some suggestions:
It's not a binary tree, it's ordinary tree
Should use english naming parameters in SO to get fullly support, besides that, it's even not violate the naming convention rules :)
I'm assuming that your model like:
public class MenuResponse
{
public string Name { get; set; }
public MenuResponse Parent { get; set; }
public List<MenuResponse> Childrens { get; set; }
}
Create instance root MenuResponse which won't show on the menu. This root would be a combination tree for easier finding.
MenuResponse root = new MenuResponse();
root.Name = "Root";
root.Childrens = yourListMenuResponse; // Attach your list here
CreateMenuStrips(root);
CreateMenuStrips creates menu on top line, CreateDropDownMenus creates item using recursion
public void CreateMenuStrips(MenuResponse root)
{
foreach (var child in root.Childrens)
{
var menu = new ToolStripMenuItem(child.Name);
CreateDropDownMenus(child, menu);
baseMenuStrip.Items.Add(menu);
}
}
public void CreateDropDownMenus(MenuResponse menuRes, ToolStripMenuItem menu)
{
if (menuRes.Childrens == null)
return;
foreach (var child in menuRes.Childrens)
{
var childMenu = menu.DropDownItems.Add(child.Name);
CreateDropDownMenus(child, childMenu as ToolStripMenuItem);
}
}
Result
I implemented the data function for anyone would like to test
public static class MenuUtils
{
public static MenuResponse AddChildMenu(this MenuResponse menu, string name)
{
if (menu.Childrens is null)
menu.Childrens = new List<MenuResponse>();
MenuResponse newMenu = new MenuResponse();
newMenu.Name = name;
newMenu.Parent = menu;
menu.Childrens.Add(newMenu);
return newMenu;
}
public static MenuResponse AddSiblingMenu(this MenuResponse menu, string name)
{
return menu.Parent.AddChildMenu(name);
}
}
Create data
MenuResponse root = new MenuResponse();
root.Name = "Root";
root.Childrens = new List<MenuResponse>();
root.AddChildMenu("Feature")
.AddChildMenu("Feature 1")
.AddSiblingMenu("Feature 2")
.AddChildMenu("Feature 2.1").Parent
.AddSiblingMenu("Feature 3")
.AddChildMenu("Feature 3.1")
.AddSiblingMenu("Feature 3.2")
.AddChildMenu("Feature 3.2.1");
root.AddChildMenu("Test")
.AddChildMenu("Test 1")
.AddChildMenu("Test 1.1")
.AddChildMenu("Test 1.1.1")
.AddSiblingMenu("Test 1.1.2");

Make foreach with nested-ifs more compact and readable [closed]

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Looking for C# syntax to make the following code more elegant, compact and readable. The foreach with the multiple if's take up too much space and look too ugly. I'm thinking LINQ syntax maybe?
(srSys and desSys are strings, and srFl and desFl are ints. The final version will have better variable naming)
public static warMod Gen ( List<AtMap> atMaps ) {
List<AtMap> atMapList = new List<AtMap>();
foreach(var a in atMaps)
{
AtMap atMap = new AtMap();
if (!string.IsNullOrEmpty(a.srSys))
{
atMap.srSys = a.srSys;
}
if (!string.IsNullOrEmpty(a.desSys))
{
atMap.desSys = a.desSys;
}
if (a.srFl != null)
{
atMap.srFl = a.srFl;
}
if (a.desFl != null)
{
atMap.desFl = a.desFl;
}
atMapList.Add(atMap);
}
return new warMod {AtMapArr = atMapList}
}

You could simply put the if's hidden away forever inside of the AtMap class.
public static warMod Gen(List<AtMap> atMaps)
{
List<AtMap> atMapList = new List<AtMap>();
foreach (var a in atMaps)
atMapList.Add(new AtMap(a));
return new warMod { AtMapArr = atMapList };
}
public class AtMap
{
public AtMap(AtMap a)
{
if (!string.IsNullOrEmpty(a.srSys))
srSys = a.srSys;
if (!string.IsNullOrEmpty(a.desSys))
desSys = a.desSys;
if (a.srFl != null)
srFl = a.srFl;
if (a.desFl != null)
desFl = a.desFl;
}
}

EDIT: Given that the overall logic of the function seems to just take an List<AtMap> type named AtMaps and make another List<AtMap> type named AtMapsList>. The function can simply be return new warMod {AtMapArr = atMaps};. However, the constructor can still be used at the part where AtMaps is made
// Use of constructor to initialize your class (AtMap.cs)
public class AtMap {
public string srSys, desSys;
public int? srFl, desFl;
public AtMap(string srSys, string desSys, int? srFl, int? desFl) {
if (!string.IsNullOrEmpty(a.srSys)) {
this.srSys = a.srSys;
}
if (!string.IsNullOrEmpty(a.desSys)) {
this.desSys = a.desSys;
}
if (a.srFl != null) {
this.srFl = a.srFl;
}
if (a.desFl != null) {
this.desFl = a.desFl;
}
}
}

When you initialize your class AtMap fields: srSys and desSys will be empty, srFl and desFl (for example: int) will be 0.
I think it can be like this:
public class AtMap
{
public string srSys {get; set;}
public string desSys {get; set;}
public int srFl {get; set;}
public int desFl {get; set;}
}
public static warMod Gen(List<AtMap> atMaps)
{
var atMapList = new List<AtMap>();
foreach (var a in atMaps)
{
var atMap = new AtMap
{
srSys = a.srSys,
desSys = a.desSys,
srFl = a.srFl ?? default(int),
desFl = a.desFl ?? default(int)
};
atMapList.Add(atMap);
}
return new warMod { AtMapArr = atMapList };
}

Best way to convert list data to another with a desired format in c# using LINQ [closed]

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How I need to insert a chart in my project and I use the C3 library to do so, which expect a specific format to work.
I retrieve my data from my database and I get it into this format
{"TotalbeAbsencesDepartmentByReason":[
[ {"Label":"DQUA","Reason":"AUT","AbsNumber":1,"AbsenceHours":3.75},
{"Label":"DQUA","Reason":"NOAUT","AbsNumber":1,"AbsenceHours":3.75},
{"Label":"DQUA","Reason":"CM","AbsNumber":4,"AbsenceHours":32}
],
[{"Label":"DPRO","Reason":"AUT","AbsNumber":10,"AbsenceHours":43.9},{"Label":"DPRO","Reason":"CM","AbsNumber":18,"AbsenceHours":144}],
[{"Label":"DMAI","Reason":"AUT","AbsNumber":2,"AbsenceHours":1.6999999999999993}],
[{"Label":"DENG","Reason":"CM","AbsNumber":2,"AbsenceHours":16}]
]}
My expected format that I want to work on is :
"TotaleAbsDepartementByReason":
[
{"Label":"DQUA","Aut":3.75,"NoAut":3.75,"CM":32},
{"Label":"DPRO","Aut":43.9,"NoAut":0,"CM":144},
{"Label":"DMAI","Aut":1.6999999999999993,"NoAut":0,"CM":0},
{"Label":"DENG","Aut":0,"NoAut":0,"CM":16}
]
This is my solution it works perfectly, But I think that there is another way to proceed for better performance :
var DeptNames = TotalbeAbsencesDepartmentByReason.Select(b => b.Label).Distinct();
var TotaleAbsDepartementByReason = new List<AbsByReason>();
foreach (var name in DeptNames)
{
var auth = TotalbeAbsencesDepartmentByReason.Where(a => a.Label == name && a.Reason == "AUT").FirstOrDefault();
var noauth = TotalbeAbsencesDepartmentByReason.Where(a => a.Label == name && a.Reason == "NOAUT").FirstOrDefault();
var cm = TotalbeAbsencesDepartmentByReason.Where(a => a.Label == name && a.Reason == "CM").FirstOrDefault();
TotaleAbsDepartementByReason.Add(new AbsByReason
{
Aut = auth != null ? auth.AbsenceHours.Value : 0 ,
CM = cm != null ? cm.AbsenceHours.Value : 0,
NoAut = noauth != null ? noauth.AbsenceHours.Value : 0,
Label = name
});
}

You can organize your code slightly better, at-least from maintainability perspective, and removing some redundancies should hopefully offer some performance boost. Below is the refactored code
public class RowData {
public string Label { get; set; }
public string Reason { get; set; }
public int AbsNumber { get; set; }
public decimal? AbsenceHours { get; set; }
}
public class AbsByReason {
public decimal Aut { get; set; }
public decimal CM { get; set; }
public string Label { get; set; }
public object NoAut { get; set; }
}
public static IEnumerable<AbsByReason> TransformData(List<RowData> totalbeAbsencesDepartmentByReason) {
return totalbeAbsencesDepartmentByReason
.GroupBy(row => row.Label)
.Select(XFormLabelGroupToAbsByReason);
}
private static AbsByReason XFormLabelGroupToAbsByReason(IEnumerable<RowData> labelGroup) {
var reason = new AbsByReason();
foreach (var rowData in labelGroup) {
if (rowData.Reason == "AUT")
reason.Aut = rowData.AbsenceHours ?? 0;
else if (rowData.Reason == "NOAUT")
reason.NoAut = rowData.AbsenceHours ?? 0;
else if (rowData.Reason == "CM")
reason.CM = rowData.AbsenceHours ?? 0;
}
return reason;
}
Let me explain what I have done. GroupBy is very helpful when using grouped data as you are in this case. Once you group your data, you only need to transform that group (instead of all the data in the list). You can use LINQ, but I would rather use a simple for-loop and if-else-if combination. I find it better to do things in single-pass than in multi-pass LINQ way even though you are pretty much talking about no more than 3 items in the list.

One problem I see is that you traverse the original list three times with different filter predicates. Here's a way how you can get the same result with only one list traversal:
var Depts = new Dictionary<string, AbsByReason>();
foreach (var entry in TotalbeAbsencesDepartmentByReason)
{
AbsByReason abs;
if (!Depts.TryGetValue(entry.Label, out abs))
Depts[entry.Label] = abs = new AbsByReason() { Label = entry.Label };
switch (entry.Reason)
{
case "AUT":
abs.Aut = entry.AbsenceHours.Value;
break;
case "NOAUT":
abs.NoAut = entry.AbsenceHours.Value;
break;
case "CM":
abs.CM = entry.AbsenceHours.Value;
break;
}
}
var TotaleAbsDepartementByReason = Depts.Select(kvp => kvp.Value).ToList();

how object array can be write or read in a text file in c#? [closed]

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I have data stored array of object of class which I am trying to write in text file ... (this is not complete code)
class Program
{
public int i;
static void Main(string[] args)
{
Program p = new Program();
user[] obj = new user[10];
for ( p.i = 0; p.i < 10; p.i++)
obj[p.i] = new user();
int index = 0;

Make Your Class look something like this:
[Serializable()] //Set this attribute to all the classes that want to serialize
public class User : ISerializable //derive your class from ISerializable
{
public int userInt;
public string userName;
//Default constructor
public User()
{
userInt = 0;
userName = "";
}
//Deserialization constructor.
public User(SerializationInfo info, StreamingContext ctxt)
{
//Get the values from info and assign them to the appropriate properties
userInt = (int)info.GetValue("UserInt", typeof(int));
userName = (String)info.GetValue("UserName", typeof(string));
}
//Serialization function.
public void GetObjectData(SerializationInfo info, StreamingContext ctxt)
{
//You can use any custom name for your name-value pair. But make sure you
// read the values with the same name. For ex:- If you write userInt as "UserInt"
// then you should read the same with "UserInt"
info.AddValue("UserInt", userInt);
info.AddValue("UserName", userName);
}
}
Now to read and write you can do these:
User user=new User();
using(StreamWriter sw=new StreamWriter(/*Filename goes here*/))
{
using(BinaryFormatter bformatter=new BinaryFormatter())
{
bformatter.Serialize(sw, user);
}
}
using(StreamReader sr=new StreamReader(/*Filename goes here*/))
{
using(BinaryFormatter bformatter=new BinaryFormatter())
{
user=(User)bformatter.Deserialize(sr);
}
}
I got lots of this code from http://www.codeproject.com/Articles/1789/Object-Serialization-using-C

If you want to Read or Write Text-Files I would suggest to look at the
System.IO Streamreader/Streamwriter Class
Take a look:
https://msdn.microsoft.com/en-us/library/system.io.streamreader%28v=vs.110%29.aspx