private void TinhTongSoChuCaiXuatHien(string chuoi)
{
chuoi = String.Join("", chuoi.Where(c => !char.IsWhiteSpace(c)));
chuoi = chuoi.Trim().ToUpper();
List <string> mangKiTuXuatHien = new List <string>();
/*chuoi
* .Where(Char.IsLetterOrDigit)
* .GroupBy(c => c)
* .Aggregate((seed, next) =>
* {
* mangKiTuXuatHien.Add(next.Key + ": " + next.Count());
* return seed;
* });
* richTextBoxSoChuCaiCau4.Text = String.Join("\n", mangKiTuXuatHien);
* txtTongSoChuCaiXuatHienCau4.Text = mangKiTuXuatHien.Count().ToString();*/
var FreQ = from x in chuoi
group x by x into y
select y;
foreach (var ArrEle in FreQ)
{
mangKiTuXuatHien.Add(ArrEle.Key + ": " + ArrEle.Count());
}
richTextBoxSoChuCaiCau4.Text = String.Join("\n", mangKiTuXuatHien);
txtTongSoChuCaiXuatHienCau4.Text = mangKiTuXuatHien.Count().ToString();
}
static void Main(string[] args)
{
List <string> words = new List <string>()
{
"the", "bike", "this", "it", "tenth", "mathematics"
};
var outputList = words.Where(x => x.Contains("th")).ToList();
foreach (var word in words)
{
Console.WriteLine(word);
}
List <string> classGrades = new List <string>()
{
"80,100,92,89,65",
"93,81,78,84,69",
"73,88,83,99,64",
"98,100,66,74,55"
};
var gradeAverage = classGrades.ToList();
List <int> studentGrade = new List <int>();
double studentGradeAverage = 0;
foreach (var result in gradeAverage)
{
studentGrade = result.Split(',').Select(m => int.Parse(m)).ToList();
//Console.WriteLine(result);
var studentAverage = studentGrade.Where(x => x != studentGrade.Min()).Average();
studentGradeAverage += studentAverage;
}
Console.WriteLine("Class Average is: " + studentGradeAverage / 4);
Console.ReadLine();
string userInput = Console.ReadLine();
var counts = from x in userInput
group x by x into y
select y;
foreach (var ArrEle in counts)
{
Console.WriteLine("Character " + ArrEle.Key + ": " + ArrEle.Count() + " times");
}
Console.ReadLine();
}
private void TinhTongSoCapTrung(string chuoi)
{
chuoi = String.Join("", chuoi.Where(c => !char.IsWhiteSpace(c)));
chuoi = chuoi.Trim().ToUpper();
List <string> mangCapTrung = new List <string>();
List <string> mangTam = new List <string>();
/*if (chuoi.StartsWith("0x"))
* {
* //return
* MessageBox.Show(chuoi.Skip(2)
* .Select((x, i) => new { index = i, value = x })
* .GroupBy(pair => pair.index / 2)
* .Select(grp => string.Join("", grp.Select(x => x.value)))
* .Select(x => Convert.ToByte(x, 16))
* .ToArray().ToString());
* }*/
int j = 1;
for (int i = 0; i < chuoi.Length; i++)
{
if (j == chuoi.Length)
{
break;
}
else
{
string cap = "";
cap = cap + chuoi[i] + chuoi[j];
mangTam.Add(cap);
j++;
}
}
var FreQ = from x in mangTam
group x by x into y
select y;
foreach (var ArrEle in FreQ)
{
if (ArrEle.Count() > 1)
{
mangCapTrung.Add(ArrEle.Key + ": " + ArrEle.Count());
}
}
txtTongSoCapTrungCau4.Text = mangCapTrung.Count().ToString();
richTextBoxCapTrungCau4.Text = String.Join("\n", mangCapTrung);
}
//////////////////////////////////////////////////////////////////////////////////ENCRYPT
/// public static string Encrypt(string text, int n)
//{
// if (n <= 0)
// {
// return text;
// }
// else
// {
// for (int j = n; j >= 1; j--)
// {
// string s = "";
//string s2 = "";
// for (int i = 0; i<text.Length; i++)
// {
// if (i % 2 == 1)
// {
// s += text[i];
// }
// else
// s2 += text[i];
// }
// text = String.Concat(s, s2);
// }
// return text;
// }
//}
// public static string Encrypt(string text, int n)
// {
// if (text == "" || text == null || n <= 0) { return text; } // Sanity Check
// string odd = "";
// string even = "";
// for (int i = 0; i < n; i++)
// {
// for (int j = 0; j < text.Length; j++)
// {
// switch (j % 2)
// {
// case 0:
// even += text[j];
// break;
// case 1:
// odd += text[j];
// break;
// default:
// Console.WriteLine("An error occurred.");
// break;
// }
// //Console.WriteLine("Index: " + (j < 10 ? "0" + j.ToString() : j.ToString()) + " Char: " + text[j] + " Text: " + "Odd: " + odd + " Even: " + even);
// }//end encryption iteration
// text = odd + even;
// odd = even = "";
// }//end n times
// return text;
// }
// public static string Decrypt(string encryptedText, int n)
// {
// if (encryptedText == "" || encryptedText == null || n <= 0) { return encryptedText; } // Sanity Check
// int len = encryptedText.Length;
// string evenHalf = "";
// string oddHalf = "";
// for (int i = 0; i < n; i++)
// {
// evenHalf = encryptedText.Substring(0, len / 2);
// oddHalf = encryptedText.Substring(len / 2, (1 + len) / 2);
// //Console.WriteLine("\n Decrypt Iteration " + i + "\n Even String: " + evenHalf + " Odd String: " + oddHalf);
// encryptedText = "";
// for (int j = 0; j < len; j++)
// {
// switch (j % 2)
// {
// case 0:
// encryptedText += oddHalf[0];
// oddHalf = oddHalf.Substring(1);
// break;
// case 1:
// encryptedText += evenHalf[0];
// evenHalf = evenHalf.Substring(1);
// break;
// default:
// Console.WriteLine("An error occurred.");
// break;
// }
// //Console.WriteLine("Index: " + (j < 10 ? "0" + j.ToString() : j.ToString()) + " Char: " + encryptedText[j] + " Text: " + encryptedText + " Odd: " + oddHalf + " Even: " + evenHalf);
// } // end decrypt iteration
// } // end n times
// return encryptedText;
// }
//}
//////////////////////////////////////////////Program Count digts >1
public static int DuplicateCount(string str)
{
string s = "";
var FreQ = from x in str.ToLower()
group x by x into y
select y;
foreach (var ArrEle in FreQ)
{
if (ArrEle.Count() > 1)
{
s += ArrEle.Key;
}
}
return(s.Length);
}
static void Main(string[] args)
{
string str;
Console.WriteLine("Specify a string:");
str = Console.ReadLine();
var FreQ = from x in str
group x by x into y
select y;
Console.WriteLine("The frequency of characters:");
foreach (var ArrEle in FreQ)
{
Console.WriteLine("Character " + ArrEle.Key + " occurs " + ArrEle.Count() + " times");
}
Console.ReadKey();
}
static void Main(string[] args)
{
string str;
Console.Write("\nLINQ : Display the characters and frequency of character from giving string : ");
Console.Write("\n----------------------------------------------------------------------------\n");
Console.Write("Input the string : ");
str = Console.ReadLine();
Console.Write("\n");
var FreQ = from x in str
group x by x into y
select y;
Console.Write("The frequency of the characters are :\n");
foreach (var ArrEle in FreQ)
{
Console.WriteLine("Character " + ArrEle.Key + ": " + ArrEle.Count() + " times");
}
}
public static void Main()
{
Linq l = new Linq();
l.Linq1();
l.Linq5();
DupString stringdemo = new DupString();
stringdemo.duplicateString();
int[] arr = new int[] { 1, 2, 3, 4, 5, 2, 3 };
var arr1 = from s in arr
group s by s into g
select g;
Console.ReadKey();
string str;
Console.Write("\nLINQ : Display the characters and frequency of character from giving string : ");
Console.Write("\n----------------------------------------------------------------------------\n");
Console.Write("Input the string : ");
str = Console.ReadLine();
Console.Write("\n");
var FreQ = from x in str
group x by x into y
select y;
Console.Write("The frequency of the characters are :\n");
foreach (var ArrEle in FreQ)
{
Console.WriteLine("Character " + ArrEle.Key + ": " + ArrEle.Count() + " times");
}
Console.ReadKey();
getPersonList();
}
static void Main(string[] args)
{
string input = "1";
while (input != "0")
{
Console.WriteLine("Welcome :) Press 1 to 8 for general practices and 0 to Close");
input = Console.ReadLine();
if (input == "1")
{
int[] n1 = { 1, 3, -2, -4, -7, -3, -8, 12, 19, 6, 9, 10, 14 };
Console.Write("\nLINQ : Using multiple WHERE clause to find the positive numbers within the list : ");
Console.Write("\n-----------------------------------------------------------------------------");
var nQuery =
from VrNum in n1
where VrNum > 0
where VrNum < 12
select VrNum;
Console.Write("\nThe numbers within the range of 1 to 11 are : \n");
foreach (var VrNum in nQuery)
{
Console.Write("{0} ", VrNum);
}
Console.Write("\n\n");
}
else if (input == "2")
{
var arr1 = new[] { 3, 9, 2, 8, 6, 5 };
Console.Write("\nLINQ : Find the number and its square of an array which is more than 20 : ");
Console.Write("\n------------------------------------------------------------------------\n");
var sqNo = from int Number in arr1
let SqrNo = Number * Number
where SqrNo > 20
select new { Number, SqrNo };
foreach (var a in sqNo)
{
Console.WriteLine(a);
}
}
else if (input == "3")
{
int[] arr1 = new int[] { 5, 9, 1, 2, 3, 7, 5, 6, 7, 3, 7, 6, 8, 5, 4, 9, 6, 2 };
Console.Write("\nLINQ : Display the number and frequency of number from given array : \n");
Console.Write("---------------------------------------------------------------------\n");
Console.Write("The numbers in the array are : \n");
Console.Write(" 5, 9, 1, 2, 3, 7, 5, 6, 7, 3, 7, 6, 8, 5, 4, 9, 6, 2\n");
var n = from x in arr1
group x by x into y
select y;
Console.WriteLine("\nThe number and the Frequency are : \n");
foreach (var arrNo in n)
{
Console.WriteLine("Number " + arrNo.Key + " appears " + arrNo.Count() + " times");
}
Console.WriteLine("\n");
}
else if (input == "4")
{
string str;
Console.Write("\nLINQ : Display the characters and frequency of character from giving string : ");
Console.Write("\n----------------------------------------------------------------------------\n");
Console.Write("Input the string : ");
str = Console.ReadLine();
Console.Write("\n");
var FreQ = from x in str
group x by x into y
select y;
Console.Write("The frequency of the characters are :\n");
foreach (var ArrEle in FreQ)
{
Console.WriteLine("Character " + ArrEle.Key + ": " + ArrEle.Count() + " times");
}
}
else if (input == "5")
{
string[] arr1 = { "aaa.frx", "bbb.TXT", "xyz.dbf", "abc.pdf", "aaaa.PDF", "xyz.frt", "abc.xml", "ccc.txt", "zzz.txt" };
Console.Write("\nLINQ : Count File Extensions and Group it : ");
Console.Write("\n------------------------------------------\n");
Console.Write("\nThe files are : aaa.frx, bbb.TXT, xyz.dbf,abc.pdf");
Console.Write("\n aaaa.PDF,xyz.frt, abc.xml, ccc.txt, zzz.txt\n");
Console.Write("\nHere is the group of extension of the files : \n\n");
var fGrp = arr1.Select(file => Path.GetExtension(file).TrimStart('.').ToLower())
.GroupBy(z => z, (fExt, extCtr) => new
{
Extension = fExt,
Count = extCtr.Count()
});
foreach (var m in fGrp)
{
Console.WriteLine("{0} File(s) with {1} Extension ", m.Count, m.Extension);
}
}
else if (input == "6")
{
List <string> listOfString = new List <string>();
listOfString.Add("m");
listOfString.Add("n");
listOfString.Add("o");
listOfString.Add("p");
listOfString.Add("q");
Console.Write("\nLINQ : Remove Items from List using remove function : ");
Console.Write("\n----------------------------------------------------\n");
var _result1 = from y in listOfString
select y;
Console.Write("Here is the list of items : \n");
foreach (var tchar in _result1)
{
Console.WriteLine("Char: {0} ", tchar);
}
string newstr = listOfString.FirstOrDefault(en => en == "o");
listOfString.Remove(newstr);
var _result = from z in listOfString
select z;
Console.Write("\nHere is the list after removing the item 'o' from the list : \n");
foreach (var rChar in _result)
{
Console.WriteLine("Char: {0} ", rChar);
}
}
else if (input == "7")
{
char[] charset1 = { 'X', 'Y', 'Z' };
int[] numset1 = { 1, 2, 3, 4 };
Console.Write("\nLINQ : Generate a Cartesian Product of two sets : ");
Console.Write("\n------------------------------------------------\n");
var cartesianProduct = from letterList in charset1
from numberList in numset1
select new { letterList, numberList };
Console.Write("The Cartesian Product are : \n");
foreach (var productItem in cartesianProduct)
{
Console.WriteLine(productItem);
}
}
else if (input == "8")
{
List <Item_mast> itemlist = new List <Item_mast>
{
new Item_mast {
ItemId = 1, ItemDes = "Ahmad "
},
new Item_mast {
ItemId = 2, ItemDes = "Ducks"
},
new Item_mast {
ItemId = 3, ItemDes = "Danish "
},
new Item_mast {
ItemId = 4, ItemDes = "Qaiser "
},
new Item_mast {
ItemId = 5, ItemDes = "Haroon "
}
};
List <Purchase> purchlist = new List <Purchase>
{
new Purchase {
InvNo = 100, ItemId = 3, PurQty = 800
},
new Purchase {
InvNo = 101, ItemId = 2, PurQty = 650
},
new Purchase {
InvNo = 102, ItemId = 3, PurQty = 900
},
new Purchase {
InvNo = 103, ItemId = 4, PurQty = 700
},
new Purchase {
InvNo = 104, ItemId = 3, PurQty = 900
},
new Purchase {
InvNo = 105, ItemId = 4, PurQty = 650
},
new Purchase {
InvNo = 106, ItemId = 1, PurQty = 458
}
};
Console.Write("\nLINQ : Generate a Left Join between two data sets : ");
Console.Write("\n--------------------------------------------------\n");
Console.Write("Here is the Item_mast List : ");
Console.Write("\n-------------------------\n");
foreach (var item in itemlist)
{
Console.WriteLine(
"Item Id: {0}, Description: {1}",
item.ItemId,
item.ItemDes);
}
Console.Write("\nHere is the Purchase List : ");
Console.Write("\n--------------------------\n");
foreach (var item in purchlist)
{
Console.WriteLine(
"Invoice No: {0}, Item Id : {1}, Quantity : {2}",
item.InvNo,
item.ItemId,
item.PurQty);
}
Console.Write("\nHere is the list after joining : \n\n");
var leftOuterJoin = from itm in itemlist
join prch in purchlist
on itm.ItemId equals prch.ItemId
into a
from b in a.DefaultIfEmpty(new Purchase())
select new
{
itid = itm.ItemId,
itdes = itm.ItemDes,
prqty = b.PurQty
};
Console.WriteLine("Item ID\t\tItem Name\tPurchase Quantity");
Console.WriteLine("-------------------------------------------------------");
foreach (var data in leftOuterJoin)
{
Console.WriteLine(data.itid + "\t\t" + data.itdes + "\t\t" + data.prqty);
}
}
}
}