We Keep Coding

Shuffling list of competitors, each month different competitor

for my friends sportscompetition, each player has to play 1 game a month against an other player. Now if i have a list of 20 players or so its not that hard to randomize the first month so i have 10 matches.
All the months after that though i'm not sure how to get the randomizer working so they won't be matched against a player they have played against.
Right now i made an sql database with Players(Name, (int)Id, Email) , Matches(Id, Player1ID, Player2ID)
I'm thinking for a randomize of the list and checking if each match doesn't contain 2 id's from a match in the database. And if 1 match does, redo the entire randomize of that month.
But i'm not sure if thats the best way.
This is what i have so far, i have yet to test it after i add some 'leden' and 'matches' to my database.
private void MaakMatchen(Maand maand)
{
List<Lid> leden = new List<Lid>();
var dbManager = new Manager();
using (var conGildenhof = dbManager.GetConnection())
{
using (var comLeden = conGildenhof.CreateCommand())
{
comLeden.CommandType = CommandType.Text;
comLeden.CommandText = "select * from dbo.Leden";
conGildenhof.Open();
using (var alleleden = comLeden.ExecuteReader())
{
Int32 voornaamPos = alleleden.GetOrdinal("Voornaam");
Int32 familienaamPos = alleleden.GetOrdinal("Familienaam");
Int32 LidNummerPos = alleleden.GetOrdinal("LidNummer");
while (alleleden.Read())
{
leden.Add(new Classes.Lid(alleleden.GetString(voornaamPos), alleleden.GetString(familienaamPos), alleleden.GetInt32(LidNummerPos)));
}
leden = Randomize(leden);
}
}
using (var comInsert = conGildenhof.CreateCommand())
{
comInsert.CommandType = CommandType.Text;
comInsert.CommandText = "Insert into dbo.Matches (Lid1Id, Lid2Id, Maand) values (#lid1, #lid2, #maand)";
var parLid1 = comInsert.CreateParameter();
parLid1.ParameterName = "#lid1";
comInsert.Parameters.Add(parLid1);
var parLid2 = comInsert.CreateParameter();
parLid2.ParameterName = "#lid2";
comInsert.Parameters.Add(parLid2);
var parMaand = comInsert.CreateParameter();
parMaand.ParameterName = "#maand";
comInsert.Parameters.Add(parMaand);
int lengte = leden.Count();
for (int i = 0; i < lengte; i = i + 2)
{
parLid1.Value = leden[i].LidNummer;
parLid2.Value = leden[i + 1].LidNummer;
parMaand.Value = (int)maand;
comInsert.ExecuteNonQuery();
}
}
}
}
private List<Lid> Randomize(List<Lid> leden)
{
for (int i=0;i<100;i++)
{
leden = Shuffle(leden);
}
int temp = CheckUp(leden);
while (temp != 100)
{
leden = Shuffle(leden, temp);
temp = CheckUp(leden);
}
return leden;
}
private List<Lid> Shuffle(List<Lid> leden)
{
Random rnd = new Random();
int a = rnd.Next(1, leden.Count() + 1);
int b = rnd.Next(1, leden.Count() + 1);
var temp = new Lid();
temp = leden[a];
leden[a] = leden[b];
leden[b] = temp;
return leden;
}
private List<Lid> Shuffle(List<Lid> leden, int id)
{
Random rnd = new Random();
int a = rnd.Next(1, leden.Count() + 1);
int b = id;
var temp = new Lid();
temp = leden[a];
leden[a] = leden[b];
leden[b] = temp;
return leden;
}
private int CheckUp(List<Lid> leden)
{
int lengte = leden.Count();
List<Matches> matches = new List<Matches>();
var dbManager = new Manager();
using (var conGildenhof = dbManager.GetConnection())
{
using (var comMatches = conGildenhof.CreateCommand())
{
comMatches.CommandType = CommandType.Text;
comMatches.CommandText = "select * from dbo.Matches";
conGildenhof.Open();
using (var allematches = comMatches.ExecuteReader())
{
Int32 lid1Pos = allematches.GetOrdinal("Lid1Id");
Int32 lid2Pos = allematches.GetOrdinal("Lid2Id");
Int32 maandPos = allematches.GetOrdinal("Maand");
while (allematches.Read())
{
matches.Add(new Classes.Matches(allematches.GetInt32(lid1Pos), allematches.GetInt32(lid2Pos), (Maand)allematches.GetInt32(maandPos)));
}
}
}
}
for (int i=0;i<lengte;i=i+2)
{
foreach (Matches match in matches)
{
if (leden[i].LidNummer == match.Lid1Id)
{
if (leden[i + 1].LidNummer == match.Lid2Id)
return leden[i].LidNummer;
}
if (leden[i].LidNummer == match.Lid2Id)
{
if (leden[i + 1].LidNummer == match.Lid1Id)
return leden[i].LidNummer;
}
}
}
return 100;
}
private void Button_Click(object sender, RoutedEventArgs e)
{
var maand = new int();
int.TryParse(TextBoxMaand.Text, out maand);
if (maand == 0)
TextBoxMaand.Text = "GETAL!";
else
{
MaakMatchen((Maand)maand);
}
}

I would shuffle the players first and create the matches in a second iteration
List<Player> players = GetPlayers();
Random _rnd = new Random();
// shuffle players
players = players.OrderBy(_ => _rnd.Next()).ToList();
// create matches
var matches = players.Take(players.Count / 2).Zip(players.Skip(players.Count / 2), (p1, p2) => new Match(p1,p2));
https://dotnetfiddle.net/sGxbx4

Get the positions of unique elements in a string[]

I have an xml file that I am accessing to create a report of time spent on a project. I'm returning the unique dates to a label created dynamically on a winform and would like to compile the time spent on a project for each unique date. I have been able to return all of the projects under each date or only one project. Currently I'm stuck on only returning one project. Can anyone please help me?? This is what the data should look like if it's correct.
04/11/15
26820 2.25
27111 8.00
04/12/15
26820 8.00
04/13/15
01det 4.33
26820 1.33
27225 4.25
etc.
This is how I'm retrieving the data
string[] weekDateString = elementDateWeekstring();
string[] uniqueDates = null;
string[] weeklyJobNumber = elementJobNumWeek();
string[] weeklyTicks = elementTicksWeek();
This is how I'm getting the unique dates.
IEnumerable<string> distinctWeekDateIE = weekDateString.Distinct();
foreach (string d in distinctWeekDateIE)
{
uniqueDates = distinctWeekDateIE.ToArray();
}
And this is how I'm creating the labels.
try
{
int dateCount;
dateCount = uniqueDates.Length;
Label[] lblDate = new Label[dateCount];
int htDate = 1;
int padDate = 10;
for (int i = 0; i < dateCount; i++ )
{
lblDate[i] = new Label();
lblDate[i].Name = uniqueDates[i].Trim('\r');
lblDate[i].Text = uniqueDates[i];
lblDate[i].TabIndex = i;
lblDate[i].Bounds = new Rectangle(18, 275 + padDate + htDate, 75, 22);
targetForm.Controls.Add(lblDate[i]);
htDate += 22;
foreach (string x in uniqueDates)
{
int[] posJobNumber;
posJobNumber = weekDateString.Select((b, a) => b == uniqueDates[i].ToString() ? a : -1).Where(a => a != -1).ToArray();
for (int pjn = 0; pjn < posJobNumber.Length; pjn++)
{
if (x.Equals(lblDate[i].Text))
{
Label lblJobNum = new Label();
int htJobNum = 1;
int padJobNum = 10;
lblJobNum.Name = weeklyJobNumber[i];
lblJobNum.Text = weeklyJobNumber[i];
lblJobNum.Bounds = new Rectangle(100, 295 + padJobNum + htJobNum, 75, 22);
targetForm.Controls.Add(lblJobNum);
htJobNum += 22;
htDate += 22;
padJobNum += 22;
}
}
}
}
}
I've been stuck on this for about 3 months. Is there anyone that can describe to me why I'm not able to properly retrieve the job numbers that are associated with a particular date. I don't believe that these are specifically being returned as dates. Just a string that looks like a date.
I really appreciate any help I can get. I'm just completely baffled. Thank you for any responses in advance. I truly appreciate the assistance.
EDIT: #Sayka - Here is the xml sample.
<?xml version="1.0" encoding="utf-8"?>
<Form1>
<Name Key="4/21/2014 6:51:17 AM">
<Date>4/21/2014</Date>
<JobNum>26820</JobNum>
<RevNum>00000</RevNum>
<Task>Modeling Secondary</Task>
<Start>06:51 AM</Start>
<End>04:27 PM</End>
<TotalTime>345945089017</TotalTime>
</Name>
<Name Key="4/22/2014 5:44:22 AM">
<Date>4/22/2014</Date>
<JobNum>26820</JobNum>
<RevNum>00000</RevNum>
<Task>Modeling Secondary</Task>
<Start>05:44 AM</Start>
<End>06:56 AM</End>
<TotalTime>43514201221</TotalTime>
</Name>
<Name Key="4/22/2014 6:57:02 AM">
<Date>4/22/2014</Date>
<JobNum>02e-n-g</JobNum>
<RevNum>00000</RevNum>
<Task>NET Eng</Task>
<Start>06:57 AM</Start>
<End>07:16 AM</End>
<TotalTime>11706118875</TotalTime>
</Name>
....
</Form1>
This is how I'm getting the information out of the xml file and returning a string[].
public static string[] elementDateWeekstring()
{
//string datetxtWeek = "";
XmlDocument xmldoc = new XmlDocument();
fileExistsWeek(xmldoc);
XmlNodeList nodeDate = xmldoc.GetElementsByTagName("Date");
int countTicks = 0;
string[] dateTxtWeek = new string[nodeDate.Count];
for (int i = 0; i < nodeDate.Count; i++)
{
dateTxtWeek[i] = nodeDate[i].InnerText;
countTicks++;
}
return dateTxtWeek;
}
Job number and Ticks are returned in a similar fashion. I've been able to reuse these snippets throught out the code. This is a one dimensional xml file?? It will always return a position for a jobnumber that equates to a date or Ticks. I will never have more or less of any one element.

You can use Linq-to-XML to parse the XML file, and then use Linq-to-objects to group (and order) the data by job date and order each group by job name.
The code to parse the XML file is like so:
var doc = XDocument.Load(filename);
var jobs = doc.Descendants("Name");
// Extract the date, job number, and total time from each "Name" element.:
var data = jobs.Select(job => new
{
Date = (DateTime)job.Element("Date"),
Number = (string)job.Element("JobNum"),
Duration = TimeSpan.FromTicks((long)job.Element("TotalTime"))
});
The code to group and order the jobs by date and order the groups by job name is:
var result =
data.GroupBy(job => job.Date).OrderBy(g => g.Key)
.Select(g => new
{
Date = g.Key,
Jobs = g.OrderBy(item => item.Number)
});
Then you can access the data by iterating over each group in result and then iterate over each job in the group, like so:
foreach (var jobsOnDate in result)
{
Console.WriteLine("{0:d}", jobsOnDate.Date);
foreach (var job in jobsOnDate.Jobs)
Console.WriteLine(" {0} {1:hh\\:mm}", job.Number, job.Duration);
}
Putting this all together in a sample compilable console application (substitute the filename for the XML file as appropriate):
using System;
using System.Linq;
using System.Xml.Linq;
namespace ConsoleApplication2
{
class Program
{
private static void Main()
{
string filename = #"d:\test\test.xml"; // Substitute your own filename here.
// Open XML file and get a collection of each "Name" element.
var doc = XDocument.Load(filename);
var jobs = doc.Descendants("Name");
// Extract the date, job number, and total time from each "Name" element.:
var data = jobs.Select(job => new
{
Date = (DateTime)job.Element("Date"),
Number = (string)job.Element("JobNum"),
Duration = TimeSpan.FromTicks((long)job.Element("TotalTime"))
});
// Group the jobs by date, and order the groups by job name:
var result =
data.GroupBy(job => job.Date).OrderBy(g => g.Key)
.Select(g => new
{
Date = g.Key,
Jobs = g.OrderBy(item => item.Number)
});
// Print out the results:
foreach (var jobsOnDate in result)
{
Console.WriteLine("{0:d}", jobsOnDate.Date);
foreach (var job in jobsOnDate.Jobs)
Console.WriteLine(" {0} {1:hh\\:mm}", job.Number, job.Duration);
}
}
}
}

The output is like this
Create a new project
Set form size bigger.
Apply these codes.
Set the location for your XML file.
Namespaces
using System.Xml;
using System.IO;
Form Code
public partial class Form1 : Form
{
const string XML_FILE_NAME = "D:\\emps.txt";
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
prepareDataGrid();
List<JOBS> jobsList = prepareXML(XML_FILE_NAME);
for (int i = 0; i < jobsList.Count; i++)
{
addDateRow(jobsList[i].jobDate.ToString("M'/'d'/'yyyy"));
for (int j = 0; j < jobsList[i].jobDetailsList.Count; j++)
dgv.Rows.Add(new string[] {
jobsList[i].jobDetailsList[j].JobNumber,
jobsList[i].jobDetailsList[j].JobHours
});
}
}
DataGridView dgv;
void prepareDataGrid()
{
dgv = new DataGridView();
dgv.BackgroundColor = Color.White;
dgv.GridColor = Color.White;
dgv.DefaultCellStyle.SelectionBackColor = Color.White;
dgv.DefaultCellStyle.SelectionForeColor = Color.Black;
dgv.DefaultCellStyle.ForeColor = Color.Black;
dgv.DefaultCellStyle.BackColor = Color.White;
dgv.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;
dgv.Width = 600;
dgv.Dock = DockStyle.Left;
this.BackColor = Color.White;
dgv.Columns.Add("Col1", "Col1");
dgv.Columns.Add("Col2", "Col2");
dgv.Columns[0].Width = 110;
dgv.Columns[1].Width = 40;
dgv.DefaultCellStyle.Font = new System.Drawing.Font("Segoe UI", 10);
dgv.RowHeadersVisible = dgv.ColumnHeadersVisible = false;
dgv.AllowUserToAddRows =
dgv.AllowUserToDeleteRows =
dgv.AllowUserToOrderColumns =
dgv.AllowUserToResizeColumns =
dgv.AllowUserToResizeRows =
!(dgv.ReadOnly = true);
Controls.Add(dgv);
}
void addJobRow(string jobNum, string jobHours)
{
dgv.Rows.Add(new string[] {jobNum, jobHours });
}
void addDateRow(string date)
{
dgv.Rows.Add(new string[] { date, ""});
dgv.Rows[dgv.Rows.Count - 1].DefaultCellStyle.SelectionForeColor =
dgv.Rows[dgv.Rows.Count - 1].DefaultCellStyle.ForeColor = Color.Firebrick;
dgv.Rows[dgv.Rows.Count - 1].DefaultCellStyle.Font = new Font("Segoe UI Light", 13.5F);
dgv.Rows[dgv.Rows.Count - 1].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleLeft;
dgv.Rows[dgv.Rows.Count - 1].Height = 25;
}
List<JOBS> prepareXML(string fileName)
{
string xmlContent = "";
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
using (StreamReader sr = new StreamReader(fs)) xmlContent = sr.ReadToEnd();
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlContent);
List<JOBS> jobsList = new List<JOBS>();
XmlNode form1Node = doc.ChildNodes[1];
for (int i = 0; i < form1Node.ChildNodes.Count; i++)
{
XmlNode dateNode = form1Node.ChildNodes[i].ChildNodes[0].ChildNodes[0],
jobNumNode = form1Node.ChildNodes[i].ChildNodes[1].ChildNodes[0],
timeTicksNode = form1Node.ChildNodes[i].ChildNodes[6].ChildNodes[0];
bool foundDate = false;
for (int j = 0; j < jobsList.Count; j++) if (jobsList[j].compareDate(dateNode.Value))
{
jobsList[j].addJob(jobNumNode.Value, Math.Round(TimeSpan.FromTicks(
(long)Convert.ToDouble(timeTicksNode.Value)).TotalHours, 2).ToString());
foundDate = true;
break;
}
if (!foundDate)
{
JOBS job = new JOBS(dateNode.Value);
string jbnum = jobNumNode.Value;
string tbtck = timeTicksNode.Value;
long tktk = Convert.ToInt64(tbtck);
double tkdb = TimeSpan.FromTicks(tktk).TotalHours;
job.addJob(jobNumNode.Value, Math.Round(TimeSpan.FromTicks(
Convert.ToInt64(timeTicksNode.Value)).TotalHours, 2).ToString());
jobsList.Add(job);
}
}
jobsList.OrderByDescending(x => x.jobDate);
return jobsList;
}
class JOBS
{
public DateTime jobDate;
public List<JobDetails> jobDetailsList = new List<JobDetails>();
public void addJob(string jobNumber, string jobHours)
{
jobDetailsList.Add(new JobDetails() { JobHours = jobHours, JobNumber = jobNumber });
}
public JOBS(string dateString)
{
jobDate = getDateFromString(dateString);
}
public JOBS() { }
public bool compareDate(string dateString)
{
return getDateFromString(dateString) == jobDate;
}
private DateTime getDateFromString(string dateString)
{
string[] vals = dateString.Split('/');
return new DateTime(Convert.ToInt32(vals[2]), Convert.ToInt32(vals[0]), Convert.ToInt32(vals[1]));
}
}
class JobDetails
{
public string JobNumber { get; set; }
public string JobHours { get; set; }
}
}

"Object reference not set to an instance of an object" error during the compilation

I get the "Object reference not set to an instance of an object" error when i compile the code at string[] values = lineuser.Split(' '); . Any idea?
namespace function
{
public partial class Form1 : Form
{
float userscore,itemscore,result;
string lineitem, lineuser;
//float[][] a = new float[89395][100];
//float[][] b = new float[1143600][100];
float[][] a = Enumerable.Range(0, 89395).Select(i => new float[100]).ToArray();
float[][] b = Enumerable.Range(0, 1143600).Select(j => new float[100]).ToArray();
//float[,] c = new float[89395, 100];
StreamReader fileitem = new StreamReader("c:\\ITEM_SVD_FULL.txt");
StreamReader fileuser = new StreamReader("c:\\USER_SVD_FULL.txt");
public Form1()
{
InitializeComponent();
for (int x = 0; x <= 8939500; x++)
{
lineuser = fileuser.ReadLine();
string[] values = lineuser.Split(' '); //<------the line's error
int userid, factoriduser;
foreach (string value in values)
{
userid = Convert.ToInt32(values[0]);
factoriduser = Convert.ToInt32(values[1]);
userscore = Convert.ToSingle(values[2]);
a[userid][factoriduser] = userscore;
}
}
for (int y = 0; y <= 114360000; y++)
{
lineitem = fileitem.ReadLine();
string[] valuesi = lineitem.Split(' ');
int itemid, factoriditem;
foreach (string value in valuesi)
{
itemid = Convert.ToInt32(valuesi[0]);
factoriditem = Convert.ToInt32(valuesi[1]);
itemscore = Convert.ToSingle(valuesi[2]);
b[itemid][factoriditem] = itemscore;
}
}
}
public float dotproduct(int userid,int itemid)
{
//get the score of 100 from user and item to dotproduct
float[] u_f = a[userid];
float[] i_f = b[itemid];
for (int i = 0; i <u_f.GetLength(1); i++)
{
result += u_f[userid] * i_f[itemid];
}
return result;
}
private void btn_recomm_Click(object sender, EventArgs e)
{
if(txtbx_id.Text==null)
{
MessageBox.Show("please insert user id");
}
if (txtbx_id.Text != null && txtbx_itemid==null)
{
int sc = Convert.ToInt32(txtbx_id.Text);
if (sc>=0 &&sc<=89395)
{
for (int z=0;z<=1143600;z++)
{
dotproduct(sc,z);
}
//Hashtable hashtable = new Hashtable();
//put the result in hashtable
//foreach (DictionaryEntry entry in hashtable)
//{
//Console.WriteLine("{0}, {1}", entry.Key, entry.Value);
// }
}
}
if (txtbx_id!=null &&txtbx_itemid!=null)
{
int uid = Convert.ToInt32(txtbx_id.Text);
int iid = Convert.ToInt32(txtbx_itemid.Text);
{
if (uid>=0 && uid<=89395 && iid>=0 && iid<=1143600)
{
dotproduct(uid,iid);
MessageBox.Show("The Score of user id "+uid+" is "+result);
}
}

Please check you lineuser variable is null
public Form1()
{
InitializeComponent();
for (int x = 0; x <= 8939500; x++)
{
if(!string.IsNullorEmpty(lineuser) //<--- check the string is empty
{
string[] values = lineuser.Split(' '); //<------the line's error
int userid, factoriduser;
foreach (string value in values)
{
userid = Convert.ToInt32(values[0]);
factoriduser = Convert.ToInt32(values[1]);
userscore = Convert.ToSingle(values[2]);
a[userid][factoriduser] = userscore;
}
}
}
for (int y = 0; y <= 114360000; y++)
{
lineitem = fileitem.ReadLine();
if(!string.IsNullorEmpty(lineitem) //<--- check the string is empty
{
string[] valuesi = lineitem.Split(' ');
int itemid, factoriditem;
foreach (string value in valuesi)
{
itemid = Convert.ToInt32(valuesi[0]);
factoriditem = Convert.ToInt32(valuesi[1]);
itemscore = Convert.ToSingle(valuesi[2]);
b[itemid][factoriditem] = itemscore;
}
}
}
}
Now you can avoid the error.

You haven't opened the Stream fileuser so it is still null.

It is really a bad practice to open the file while you define the global variable in your class.
But as part from this, when you call ReadLine the result could be a null because there are no more lines to read and you don't check for this case.
Looking at the code shown above, there is no need to have a global variable for the filestream, so, the usual pattern when handling resources (OPEN/USE/CLOSE) should be followed for both files
public Form1()
{
InitializeComponent();
string lineuser;
// OPEN
using(StreamReader fileuser = new StreamReader("c:\\USER_SVD_FULL.txt"))
{
// USE
while((lineuser = fileuser.ReadLine()) != null)
{
string[] values = lineuser.Split(' ');
....
}
} //CLOSE & DISPOSE
....
string lineitem;
using(StreamReader fileitem = new StreamReader("c:\\ITEM_SVD_FULL.txt"))
{
while((lineitem = fileitem.ReadLine()) != null)
{
string[] valuesi = lineitem.Split(' ');
....
}
}

To create a list with multiple list inside it

Below is my main list
var serie_line = new { name = series_name, data = new List<object>() };
here I add items in data as follows,
serie_line.data.Add(child_object_name);
serie_line.data.Add(period_final_value );
I then add this var serie_line to another list series as follows,
List<object> series = new List<object>();
series.Add(serie_line);
finally ,I serialize this series into JSON as below,
var obj4 = new { legend = legend, title,chart, series};
JSON_File_Returned = jSearializer.Serialize(obj4);
whereas
System.Web.Script.Serialization.JavaScriptSerializer jSearializer = new System.Web.Script.Serialization.JavaScriptSerializer();
Now Output I am getting is as follows,
{
"legend":{"enabled":"true"},
"title":{"text":"Financial"},
"chart":{"type":"pie"},
"series":[
{"name":"Actual","data":["Market Share",20.00]},
{"name":"Actual","data":["Sales Growth",30.00]},
{"name":"Actual","data":["Operating Profit",40.00]},
{"name":"Actual","data":["Gross Margin %",10.00]}
]
}
But my required output is as follows,
{
"legend":{"enabled":"true"},
"title":{"text":"Financial"},
"chart":{"type":"pie"},
"series":[
{"name":"Actual","data":[["Market Share",20.00],["Sales Growth",30.00],["Operating Profit",40.00],["Gross Margin %",10.00]]}
]
}
So..That I can plot pie chart in highchart using this JSON output...I have tried for everything like using dictionary,making different class and then using it's object and so on...but can't make it out....
Below is my entire code...if in case I am messing with any loop and I don't recognize it but any one might notice it..please check the below code for the same..
var serie_line = new { name = series_name, data = new List<object>() };
for (int k = 0; k <= read_Series_Splitted_Name.Length; k++) //for loop for passing chart type in series
{
for (int i = 0; i < id_series_before_offset.Count; i++) //for loop for counting series ID
{
var xmlAttributeCollection = id_series_before_offset[i].Attributes;
if (xmlAttributeCollection != null)
{
var seriesid = xmlAttributeCollection["id"];
xmlActions_id[i] = seriesid.Value;
resulted_series_id = seriesid.Value;
series_name = Client.GetAttributeAsString(sessionId, resulted_series_id, "name", "");
new_series_name = series_name;
series_Atribute = Client.GetAttributeAsString(sessionId, resulted_series_id, "symbol", "");
if (read_Series_Splitted_Name_store == series_Atribute)
{
serie_line = new { name = series_name, data = new List<object>() };
}
k++;
// Forloop for PeriodId and It's Value
var value = Read_XML_Before_Offset.SelectNodes("//measure.values/series[" + (i + 1) + "]/value");
var xmlActions = new string[value.Count];// for periodname
var xmlActionsone = new string[value.Count]; // for period value
for (int j = 0; j < value.Count; j++)
{
var xmlAttributeCollection_for_period = value[j].Attributes;
if (xmlAttributeCollection_for_period != null)
{
if (i == 0 && a == 0)
{
var periodid = xmlAttributeCollection_for_period["periodid"];
xmlActions[j] = periodid.Value;
period_final_id = periodid.Value;
period_name = Client.GetAttributeAsString(sessionId, periodid.Value, "name", "");
period_Name.Add(period_name);
}
try
{
var action = xmlAttributeCollection_for_period["value"]; // xmlActionsone[j] = action.Value;
period_final_value = float.Parse(action.Value);
// serie_line.data.Add(period_final_value);
serie_line.data.Add(child_object_name);
serie_line.data.Add(period_final_value );
}
catch (Exception ex1)
{
serie_line.data.Add("");
serie_line.data.Add( null );
}
}
}
}
}
}
series.Add(serie_line);

Your C# code should look something like this all stripped down:
var serie_line = new { name = "Actual", data = new List<object>() };
serie_line.data.Add(new List<object>() {"Market Share", 20.0});
serie_line.data.Add(new List<object>() {"Sales Growth", 30.0});
serie_line.data.Add(new List<object>() {"Operting Profit", 40.0});
serie_line.data.Add(new List<object>() {"Gross Margin %", 10.0});
jSearializer.Serialize(serie_line);
Which produces:
{"name":"Actual","data":[["Market Share",20],["Sales Growth",30],["Operting Profit",40],["Gross Margin %",10]]}
I'm not following the bottom part of the code (how you create child_object_name and period_final_value, but I think you want:
serie_line.data.Add(new List<object>() {child_object_name, period_final_value });
Instead of:
serie_line.data.Add(child_object_name);
serie_line.data.Add(period_final_value );

Removing More Than Two Duplicates From A List

I'm trying to figure out the best way to remove duplicates from a list in C#. However I want to keep two of the duplicated entries (two total identical entries) while removing all of the rest. I've seen plenty of examples of removing all duplicates from a list, but my specific issue seems to be less common.
This is the majority of my code. The background is this is a debate scheduler project for a class I'm in. I research a few ways to delete duplicates and found many on here but not with my stipulations. Each team can only debate twice per day and no more and they are assigned randomly to there debate times leading to my problem of them being assigned more than two times per scheduled day.
The teams are being assigned randomly and then moved to a list, so by duplicates I mean I'm trying to remove all dupes after the initial two if they exist at all.
Thanks and sorry for the ambiguity.
namespace SWEProject3
{
public partial class DebateSchedulerForm : Form
{
//There are 10 slots for team names
//The names can only be edited by the superadmin
static int ADMIN = 1;
static int GUEST = 2;
public List<string> nameList = new List<string>();
public List<string> winList = new List<string>();
public List<string> lossList = new List<string>();
public List<string> dateList = new List<string>();
public List<string> debateList = new List<string>();
public List<string> week1List = new List<string>();
public List<string> week2List = new List<string>();
public List<string> week3List = new List<string>();
public List<string> week4List = new List<string>();
public List<string> week5List = new List<string>();
public List<string> week6List = new List<string>();
public List<string> week7List = new List<string>();
public List<string> week8List = new List<string>();
public List<string> week9List = new List<string>();
public List<string> week10List = new List<string>();
public DebateSchedulerForm(int x)
{
InitializeComponent();
initNames();
initWin();
initLoss();
initDates();
initDebates();
initWeekLists();
ListNames();
ListWin();
ListLoss();
ListDates();
if (x == ADMIN || x == GUEST)
{
Name1.ReadOnly = true;
Name2.ReadOnly = true;
Name3.ReadOnly = true;
Name4.ReadOnly = true;
Name5.ReadOnly = true;
Name6.ReadOnly = true;
Name7.ReadOnly = true;
Name8.ReadOnly = true;
Name9.ReadOnly = true;
Name10.ReadOnly = true;
Win1.ReadOnly = true;
Win2.ReadOnly = true;
Win3.ReadOnly = true;
Win4.ReadOnly = true;
Win5.ReadOnly = true;
Win6.ReadOnly = true;
Win7.ReadOnly = true;
Win8.ReadOnly = true;
Win9.ReadOnly = true;
Win10.ReadOnly = true;
Loss1.ReadOnly = true;
Loss2.ReadOnly = true;
Loss3.ReadOnly = true;
Loss4.ReadOnly = true;
Loss5.ReadOnly = true;
Loss6.ReadOnly = true;
Loss7.ReadOnly = true;
Loss8.ReadOnly = true;
Loss9.ReadOnly = true;
Loss10.ReadOnly = true;
ChangeDates.Visible = false;
Save.Visible = false;
}
}
public void Shuffle()
{
Random gen = new Random();
int n = debateList.Count();
while (n > 1)
{
n--;
int k = gen.Next(n + 1);
string value = debateList[k];
debateList[k] = debateList[n];
debateList[n] = value;
}
}
public void ListNames()
{
this.Name1.Text = nameList[0];
this.Name2.Text = nameList[1];
this.Name3.Text = nameList[2];
this.Name4.Text = nameList[3];
this.Name5.Text = nameList[4];
this.Name6.Text = nameList[5];
this.Name7.Text = nameList[6];
this.Name8.Text = nameList[7];
this.Name9.Text = nameList[8];
this.Name10.Text = nameList[9];
}
public void ListWin()
{
this.Win1.Text = winList[0];
this.Win2.Text = winList[1];
this.Win3.Text = winList[2];
this.Win4.Text = winList[3];
this.Win5.Text = winList[4];
this.Win6.Text = winList[5];
this.Win7.Text = winList[6];
this.Win8.Text = winList[7];
this.Win9.Text = winList[8];
this.Win10.Text = winList[9];
}
public void ListLoss()
{
this.Loss1.Text = lossList[0];
this.Loss2.Text = lossList[1];
this.Loss3.Text = lossList[2];
this.Loss4.Text = lossList[3];
this.Loss5.Text = lossList[4];
this.Loss6.Text = lossList[5];
this.Loss7.Text = lossList[6];
this.Loss8.Text = lossList[7];
this.Loss9.Text = lossList[8];
this.Loss10.Text = lossList[9];
}
public void ListDates()
{
this.Date1.Text = dateList[0];
this.Date2.Text = dateList[1];
this.Date3.Text = dateList[2];
this.Date4.Text = dateList[3];
this.Date5.Text = dateList[4];
this.Date6.Text = dateList[5];
this.Date7.Text = dateList[6];
this.Date8.Text = dateList[7];
this.Date9.Text = dateList[8];
this.Date10.Text = dateList[9];
}
public void initNames()
{
StreamReader sr = new StreamReader("nameList.txt");
for (int i = 0; i < 10; i++)
{
string line = sr.ReadLine();
nameList.Add(line);
}
sr.Close();
}
public void initWin()
{
StreamReader sw = new StreamReader("Win.txt");
for (int i = 0; i < 10; i++)
{
string line = sw.ReadLine();
winList.Add(line);
}
sw.Close();
}
public void initLoss()
{
StreamReader sw = new StreamReader("Loss.txt");
for (int i = 0; i < 10; i++)
{
string line = sw.ReadLine();
lossList.Add(line);
}
sw.Close();
}
public void initDates()
{
StreamReader sw = new StreamReader("Dates.txt");
for (int i = 0; i < 10; i++)
{
string line = sw.ReadLine();
dateList.Add(line);
}
sw.Close();
}
public void initDebates()
{
StreamReader sw = new StreamReader("Debate.txt");
for (int i = 0; i < 45; i++)
{
string line = sw.ReadLine();
debateList.Add(line);
}
sw.Close();
}
public void initWeekLists()
{
week1List.Add(debateList[0]);
week1List.Add(debateList[1]);
week1List.Add(debateList[2]);
week1List.Add(debateList[3]);
week1List.Add(debateList[4]);
week2List.Add(debateList[5]);
week2List.Add(debateList[6]);
week2List.Add(debateList[7]);
week2List.Add(debateList[8]);
week2List.Add(debateList[9]);
week3List.Add(debateList[10]);
week3List.Add(debateList[11]);
week3List.Add(debateList[12]);
week3List.Add(debateList[13]);
week3List.Add(debateList[14]);
week4List.Add(debateList[15]);
week4List.Add(debateList[16]);
week4List.Add(debateList[17]);
week4List.Add(debateList[18]);
week4List.Add(debateList[19]);
week5List.Add(debateList[20]);
week5List.Add(debateList[21]);
week5List.Add(debateList[22]);
week5List.Add(debateList[23]);
week5List.Add(debateList[24]);
week6List.Add(debateList[25]);
week6List.Add(debateList[26]);
week6List.Add(debateList[27]);
week6List.Add(debateList[28]);
week7List.Add(debateList[29]);
week7List.Add(debateList[30]);
week7List.Add(debateList[31]);
week7List.Add(debateList[32]);
week8List.Add(debateList[33]);
week8List.Add(debateList[34]);
week8List.Add(debateList[35]);
week8List.Add(debateList[36]);
week9List.Add(debateList[37]);
week9List.Add(debateList[38]);
week9List.Add(debateList[39]);
week9List.Add(debateList[40]);
week10List.Add(debateList[41]);
week10List.Add(debateList[42]);
week10List.Add(debateList[43]);
week10List.Add(debateList[44]);
}
public void finNames()
{
StreamWriter sw = new StreamWriter("nameList.txt");
sw.WriteLine(this.Name1.Text);
sw.WriteLine(this.Name2.Text);
sw.WriteLine(this.Name3.Text);
sw.WriteLine(this.Name4.Text);
sw.WriteLine(this.Name5.Text);
sw.WriteLine(this.Name6.Text);
sw.WriteLine(this.Name7.Text);
sw.WriteLine(this.Name8.Text);
sw.WriteLine(this.Name9.Text);
sw.WriteLine(this.Name10.Text);
sw.Close();
}
public void finWin()
{
StreamWriter sw = new StreamWriter("Win.txt");
sw.WriteLine(this.Win1.Text);
sw.WriteLine(this.Win2.Text);
sw.WriteLine(this.Win3.Text);
sw.WriteLine(this.Win4.Text);
sw.WriteLine(this.Win5.Text);
sw.WriteLine(this.Win6.Text);
sw.WriteLine(this.Win7.Text);
sw.WriteLine(this.Win8.Text);
sw.WriteLine(this.Win9.Text);
sw.WriteLine(this.Win10.Text);
sw.Close();
}
public void finLoss()
{
StreamWriter sw = new StreamWriter("Loss.txt");
sw.WriteLine(this.Loss1.Text);
sw.WriteLine(this.Loss2.Text);
sw.WriteLine(this.Loss3.Text);
sw.WriteLine(this.Loss4.Text);
sw.WriteLine(this.Loss5.Text);
sw.WriteLine(this.Loss6.Text);
sw.WriteLine(this.Loss7.Text);
sw.WriteLine(this.Loss8.Text);
sw.WriteLine(this.Loss9.Text);
sw.WriteLine(this.Loss10.Text);
sw.Close();
}
public void finDebates()
{
StreamWriter sw = new StreamWriter("Debate.txt");
for (int i = 0; i < 45; i++)
{
sw.WriteLine(debateList[i]);
}
sw.Close();
}
private void Save_Click(object sender, EventArgs e)
{
finNames();
finWin();
finLoss();
finDebates();
}
private void Close_Click(object sender, EventArgs e)
{
this.Close();
}
private void ChangeDates_Click(object sender, EventArgs e)
{
ChangeDates form = new ChangeDates(dateList);
form.ShowDialog();
initDates();
ListDates();
}
private void Date1_Click(object sender, EventArgs e)
{
Week_1 form = new Week_1(nameList, week1List);
form.ShowDialog();
}
private void Date2_Click(object sender, EventArgs e)
{
Week_2 form = new Week_2(nameList, week2List);
form.ShowDialog();
}
}
}

Assuming the debateList is the list you'd like to filter:
public List<string> debateList = new List<string>();
You can use Linq's GroupBy method chained with the SelectMany method and take advantage of the Take method which will take up to the max specified even if less are present:
List<string> result = debateList.GroupBy( x => x )
.SelectMany( x => x.Take( 2 ) )
.OrderBy( x => x )
.ToList()

You could set a counting variable, loop through the container and increment the counter each time an element is present in the container.