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データテーブルをフル活用! LINQでいろいろやってみた / I tried LINQ to ...
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Ryosuke Iwasaki
October 17, 2020
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データテーブルをフル活用! LINQでいろいろやってみた / I tried LINQ to DataTable
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Transcript
σʔλςʔϒϧΛϑϧ׆༻ʂ -*/2Ͱ͍Ζ͍ΖͬͯΈͨ
ࣗݾհ • ͍Θ͖͞ Γΐ͏͚͢ ◦ ύʔιϧϓϩηεˍςΫϊϩδʔגࣜձࣾ ◦ 6J1BUI+BQBO.71 ▪ ࡢʢʣʹҾ͖ଓ͖ೝఆ͍͖ͨͩ·ͨ͠ʂ
• 6J1BUIྺ ◦ ʢ݄ʙʣ • ͖ͳΞΫςΟϏςΟ ◦ 4FOE&YDIBOHF.BJM.FTTBHF 6J1BUI.7131""84 ωοτϫʔΫ ࣗಈԽ αΧφΫγϣϯ ࡔ ϥΠϒ ΧϥΦέ ຊञ ېञத
લஔ͖ • Θ͔Γ͢͞Λॏࢹͨ͠༰ʹ͍ͯ͠·͢ ◦ ٕज़తʹਖ਼͘͠ͳ͍આ໌͋Δ͔͠Ε·ͤΜ • ࣮తʹ͑Δ͔Ͳ͏͔อূ͠·ͤΜ ◦ Ϣʔεέʔε͝ͱʹ͝அ͍ͩ͘͞
͖ΐ͏͜Μͳ͜ͱΛͳ͠·͢ • -*/2ͱͳʹ͔ • ͲΜͳ;͏ʹ͔ͭ͏ͷ͔ • 6J1BUIͰ͏ϝϦοτ
-*/2ͱ • -BOHVBHF*OUFHSBUFE2VFSZʢ౷߹ݴޠΫΤϦʣ • /&5'SBNFXPSLʹ͓͍ͯɺ༷ʑͳछྨͷσʔλू߹ʹରͯ͠ඪ४Խ ͞Εͨํ๏ͰσʔλΛ͍߹ΘͤΔ͜ͱʢΫΤϦʣΛՄೳʹ͢ΔͨΊʹɺݴ ޠʹ౷߹͞Εͨػೳͷ͜ͱͰ͋Δɻ XJLJQFEJB • ΫΤϦ
◦ σʔλͷू߹ʹର͢Δૢ࡞ʢݕࡧɺநग़ɺมɺܭࢉͳͲʣ • ౷߹ ◦ ݴޠʹରͯ͠ػೳՃ͠ʮඪ४Խʯͯ͠ར༻Ͱ͖ΔΑ͏ʹͨ͠
-*/2Ͱग़དྷΔ͜ͱͷҰྫ • ϑΟϧλ • ม • ϢχʔΫԽʢॏෳআʣ • ूܭ •
ൣғऔಘ • ιʔτ
6J1BUIͰ͑ΔΜͰ͢
σʔλςʔϒϧʹ͑Δ • σʔλςʔϒϧ ߦσʔλͷू߹ 㱺ߦσʔλʹରͯ͠ॲཧͰ͖Δ • ߦσʔλͷҙͷྻͷσʔλΛͬͯૢ࡞Ͱ͖Δ
6J1BUIͰͲ͏ͬͯ͏ͷʁ • ʮࣜʯͱͯ͠͏͜ͱ͕Ͱ͖·͢ ◦ ͱͱݴޠʹೖ͍ͬͯΔΈͳͷͰ • "TTJHOͰ͑Δ͠ɺ'PSFBDIͷίϨΫγϣϯͱ ͯ͠ͷࢦఆͰ͖Δ • ฦ͢ɺॲཧʹΑͬͯҟͳΔ
FYมʢҙͷྻͷσʔλΛ-JTUʹʣ CJSUIEBZT-JTU JOQVU5BCMF"T&OVNFSBCMF4FMFDU @ 'VODUJPO SPX %BUF5JNF1BSTF SPX lੜ݄z 5P4USJOH
@ 5P-JTU • "T&OVNFSBCMF ◦ σʔλςʔϒϧͷσʔλΛ-*/2Ͱѻ͑ΔΑ͏ʹม • 4FMFDU ◦ ҾʹʮॲཧʯΛࢦఆͯ͠ɺཁૉʹରͯ͠ॲཧΛߦ͏ • 5P-JTU ◦ ͜Ε·Ͱͷॲཧ݁ՌΛ-JTUܕʹม͢Δ
FYมʢҙͷྻͷσʔλΛ-JTUʹʣ CJSUIEBZT-JTU JOQVU5BCMF"T&OVNFSBCMF4FMFDU @ 'VODUJPO SPX %BUF5JNF1BSTF SPX lੜ݄z
5P4USJOH @ 5P-JTU • 'VODUJPO SPX ◦ Ұ࣌తͳॲཧΛࣔؔ͢Λఆٛ͢Δ • %BUF5JNF1BSTF SPX lੜ݄z 5P4USJOH ◦ ͓ͳ͡Έͷॲཧ
6J1BUIͰ͏ϝϦοτ͋Δʁ
ͦΜͳʹଟ͘ͳ͍ • ͋Δྻ͔ΒϢχʔΫͳσʔλΛऔΓग़͢ • σʔλΛҰఆͷ݅Ͱׂ͢Δ • ϑΟϧλʔͷΘΓ ◦ ϑΟϧλʔ͍ͨ͠σʔλΛઌʹՃ͓͖͍ͯͨ͠߹ ▪
ྫʣੜ݄ʢ%BUF5JNFʣ͔ΒɺಛఆͷͷϨίʔυΛநग़͍ͨ͠
ͻͶΓͩͨ͠ϝϦοτ • εϐʔυૣ͍ ◦ ͰLߦͷσʔλͳΒΞΫςΟϏςΟϕʔεͰΜͰඵҎ • ΞΫςΟϏςΟݮΒͤΔ ◦ ͰՄಡੑԼ͕Δ ◦
อकੑͪΐͬͱඍົ͔
0VUQVUͷϩά • <%FCVH>&YFDVUJPOTUBSUFEGPSQSPKFDUEFNP@-*/2 • <*OGP>EFNP@-*/2FYFDVUJPOTUBSUFE • <*OGP>˙ྻσʔλͷநग़@%BUB5BCMFܥͷΞΫςΟϏςΟͰॲཧ • <*OGP>ॴཁ࣌ؒ •
<*OGP>˙ྻσʔλͷநग़@-*/2Ͱॲཧ • <*OGP>ॴཁ࣌ؒ • <*OGP>˙߹ܭͷࢉग़@%BUB5BCMFܥͷΞΫςΟϏςΟͰॲཧ • <*OGP>ϙΠϯτ • <*OGP>ॴཁ࣌ؒ • <*OGP>˙߹ܭͷࢉग़@-*/2Ͱॲཧ • <*OGP>ϙΠϯτ • <*OGP>ॴཁ࣌ؒ • <*OGP>˙ྻ͔ΒϢχʔΫσʔλΛநग़@%BUB5BCMFܥͷΞΫςΟϏςΟͰॲཧ • <*OGP>ॴཁ࣌ؒ • <*OGP>˙ྻ͔ΒϢχʔΫσʔλΛநग़@-*/2Ͱॲཧ • <*OGP>ॴཁ࣌ؒ • <*OGP>EFNP@-*/2FYFDVUJPOFOEFEJO
ࢀߟใ • lWCOFUMJORz ͰάάΕͨ͘͞Μग़͖ͯ·͢ ◦ Θͨ͠2JJUBͰֶͼ·ͨ͠ • αϯϓϧϫʔΫϑϩʔ͓͖͋͛ͯ·͢ ◦ ͨͿΜHJUIVC
◦ ͋͛ͨΒ͓Βͤ͠·͢
͓ΘΓ