Video: Peb puas tuaj yeem tsim cov khoom dynamic hauv C# thiab DynamicObject yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv C# , koj qhia hom alate-bound khoom raws li dynamic . Koj ua tau kuj tsim koj tus kheej hom uas inherits lub DynamicObject chav kawm. Koj ua tau ces override cov tswv cuab ntawm lub DynamicObject chav kawm los muab sijhawm ua haujlwm dynamic kev ua haujlwm.
Ib yam li ntawd, nws raug nug, qhov txawv ntawm cov khoom thiab cov dynamic yog dab tsi?
Feem ntau, ob qho tib si dynamic lo lus tseem ceeb thiab khoom tsis txhob ua compile-time hom checks thiab txheeb xyuas hom khoom ntawm lub sijhawm khiav nkaus xwb thiab ob qho tib si tuaj yeem khaws txhua yam ntawm qhov sib txawv. Cov ntsiab lus hauv qab no txhais Yam khoom thiab Dynamic variables hauv C#. Qhov txawv 1. Yam khoom : Lub Compiler muaj cov ntaub ntawv me me txog hom
Ib tug kuj yuav nug, qhov txawv ntawm VAR thiab cov khoom hauv C# yog dab tsi? Nws yog siv rau implicitly ntaus hauv zos variables thiab foranonymous hom. Cov var lo lus tseem ceeb feem ntau yog siv nrog LINQ. Thaum peb tshaj tawm qhov sib txawv raws li a var hom, thevariable hom yog inferred los ntawm lub initialization hlua atcompile lub sij hawm. Peb tsis tuaj yeem hloov hom ntawm cov hloov pauv no atruntime.
Ntawm no, dab tsi yog dynamic hauv C #?
Cov dynamic lo lus tseem ceeb yog tshiab rau C# 4.0, andis siv los qhia rau lub compiler tias qhov sib txawv ntawm hom tuaj yeem hloov lossis tias nws tsis paub txog thaum lub sijhawm ua haujlwm. Xav tias nws muaj peev xwm cuam tshuam nrog Ib Yam Khoom yam tsis tas yuav pov nws. Tam sim no, tau kawg, thaum koj siv a dynamic variable, koj muab upcompiler hom checking.
Dab tsi yog qhov txawv ntawm VAR thiab dynamic hauv C#?
var yog statically typed variable. Nws tshwm sim hauv a ntaus ntawv sib txawv heev, nyob rau hauv lwm yam lus cov ntaub ntawv hom ntawm cov variables yog inferred nyob rau hauv compile lub sij hawm. dynamic yog dynamically typed variables. Qhov no txhais tau tias, lawv hom isinferred ntawm run-time thiab tsis compile lub sij hawm nyob rau hauv sib piv rau var hom.
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