using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.ComponentModel;
using?System.Data;
using?System.xml.Linq;

namespace?GroupingOperators
{
????class?Program
????{
????????static?void?Main（string[]?args）
????????{
????????????LinqSamples?samples?=?new?LinqSamples（）;

????????????//?Comment?or?uncomment?the?method?calls?below?to?run?or?not
????????????samples.DataSetLinq40（）;????//?This?sample?uses?group?by?to?partition?a?list?of?numbers?by?their?remainder?when?divided?by?5.
????????????//samples.DataSetLinq41（）;????//?This?sample?uses?group?by?to?partition?a?list?of?words?by?their?first?letter.
????????????//samples.DataSetLinq42（）;????//?This?sample?uses?group?by?to?partition?a?list?of?products?by?category.
????????????//samples.DataSetLinq43（）;????//?This?sample?uses?group?by?to?partition?a?list?of?each?customer‘s?orders?first?by?year?and?then?by?month.
????????????//samples.DataSetLinq44（）;????//?This?sample?uses?GroupBy?to?partition?trimmed?elements?of?an?array?using?a?custom?comparer?that?matches?words?that?are?anagrams?of?each?other.
????????????//samples.DataSetLinq45（）;????//?This?sample?uses?GroupBy?to?partition?trimmed?elements?of?an?array?using?a?custom?comparer?that?matches?words?that?are?anagrams?of?each?other?and?then?converts?the?results?to?uppercase.
????????}

????????private?class?LinqSamples
????????{
????????????private?DataSet?testDS;

????????????public?LinqSamples（）
????????????{
????????????????testDS?=?TestHelper.CreateTestDataset（）;
????????????}

????????????[Category（“Grouping?Operators“）]
????????????[Description（“This?sample?uses?group?by?to?partition?a?list?of?numbers?by?“?+
????????????????????????“their?remainder?when?divided?by?5.“）]
????????????public?void?DataSetLinq40（）
????????????{

????????????????var?numbers?=?testDS.Tables[“Numbers“].AsEnumerable（）;

????????????????var?numberGroups?=
????????????????????from?n?in?numbers
????????????????????group?n?by?n.Field（“number“）?%?5?into?g
????????????????????select?new?{?Remainder?=?g.Key?Numbers?=?g?};

????????????????foreach?（var?g?in?numberGroups）
????????????????{
????????????????????Console.WriteLine（“Numbers?with?a?remainder?of?{0}?when?divided?by?5:“?g.Remainder）;
????????????????????foreach?（var?n?in?g.Numbers）
????????????????????{
????????????????????????Console.WriteLine（n.Field（“number“））;
????????????????????}
????????????????}
????????????}

????????????[Category（“Grouping?Operators“）]
????????????[Description（“This?sample?uses?group?by?to?partition?a?list?of?words?by?“?+
?????????????????????????“their?first?letter.“）]
????????????public?void?DataSetLinq41（）
????????????{

????????????????var?words4?=?testDS.Tables[“Words4“].AsEnumerable（）;

????????????????var?wordGroups?=
????????????????????from?w?in?words4
????????????????????group?w?by?w.Field（“word“）[0]?into?g
????????????????????select?new?{?FirstLetter?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????33225??2014-06-06?12:20??description.html
?????文件????????1670??2014-06-06?12:20??description\offline.js
?????文件???????????0??2014-06-06?12:20??description\Combined.css
?????文件???????????0??2014-06-06?12:20??description\bfb4b7f8-142c-4880-b2e0-5268b6906b1dCombined.css
?????文件???????10457??2014-06-06?12:20??description\Galleries.css
?????文件????????1727??2014-06-06?12:20??description\Layout.css
?????文件???????71647??2014-06-06?12:20??description\Brand.css
?????文件????????3369??2014-06-06?12:20??description\iframedescription.css
?????文件????????4688??2014-06-06?12:20??license.rtf
?????文件??????139736??2014-06-06?12:20??LINQ??-?Grouping?Operators\description.html
?????文件????????1670??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\offline.js
?????文件???????????0??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\Combined.css
?????文件???????????0??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\0aac1760-b513-488a-ba57-e31d9413a075Combined.css
?????文件???????10457??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\Galleries.css
?????文件????????1727??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\Layout.css
?????文件???????71647??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\Brand.css
?????文件????????3369??2014-06-06?12:20??LINQ??-?Grouping?Operators\description\iframedescription.css
?????文件????????3239??2014-06-06?12:20??LINQ??-?Grouping?Operators\license.rtf
?????文件?????????893??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators.sln
?????文件???????19456??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators.suo
?????目錄???????????0??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\
?????目錄???????????0??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\
?????目錄???????????0??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\Debug\
?????文件??????143963??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\Debug\Customers.xml
?????文件???????39424??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\Debug\GroupingOperators.exe
?????文件???????42496??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\Debug\GroupingOperators.pdb
?????文件???????11600??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\Debug\GroupingOperators.vshost.exe
?????文件?????????490??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\bin\Debug\GroupingOperators.vshost.exe.manifest
?????文件??????143963??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\Customers.xml
?????文件????????2610??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\GroupingOperators.csproj
?????目錄???????????0??2014-06-06?12:20??LINQ??-?Grouping?Operators\C#\GroupingOperators\obj\
............此處省略454個文件信息