Cov txheej txheem:
Video: Dab tsi yog cov ntaub ntawv annotation validator attributes hauv MVC?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Coj kom zoo dua ntawm Cov lus piav qhia Model Binder los ua kev lees paub hauv ASP. NET MVC daim ntawv thov. Qhov zoo ntawm kev siv lub Cov ntaub ntawv Annotation validators yog tias lawv pab koj ua kev lees paub tsuas yog ntxiv ib lossis ntau dua yam ntxwv - xws li Yuav Tsum Tau lossis StringLength tus cwj pwm - mus rau ib qho khoom vaj khoom tsev.
Kuj paub, dab tsi yog lwm cov ntaub ntawv annotation tus cwj pwm rau kev siv tau hauv MVC?
Ntawm no, yog ib daim ntawv teev npe ntawm qee cov ntaub ntawv tseem ceeb Cov Lus Qhia Tshaj Tawm
- Yuav tsum tau. Qhia meej tias Input teb tsis tuaj yeem khoob.
- DisplayName. Qhia meej lub npe zaub rau ib qho khoom.
- StringLength. Qhia qhov tsawg kawg nkaus thiab qhov ntev tshaj plaws rau cov cuab yeej.
- Ntau yam. Qhia txog qhov ntau ntawm tus lej.
- khi.
- ScaffoldColumn.
- DisplayFormat.
- ReadOnly.
Ib yam li ntawd, cov cwj pwm twg tuaj yeem siv rau kev siv cov ntaub ntawv hauv MVC? Cov ntaub ntawv
| Yam ntxwv | Kev piav qhia |
|---|---|
| RegularExpression | Qhia meej tias tus nqi teb yuav tsum phim nrog cov lus qhia tsis tu ncua |
| CreditCard | Qhia meej tias qhov chaw teev tseg yog tus lej credit card |
| CustomValidation | Kev cai validation txoj kev validate lub teb |
| EmailAddress | Validates nrog email chaw nyob hom |
Raws li, cov ntaub ntawv annotation hauv MVC yog dab tsi?
Cov lus piav qhia tsis muaj dab tsi tab sis qee qhov kev lees paub uas peb muab tso rau hauv peb cov qauv kom siv tau cov tswv yim los ntawm tus neeg siv. ASP. NET MVC muab ib tug tshwj xeeb feature nyob rau hauv uas peb yuav validate cov qauv siv lub Cov lus piav qhia tus cwj pwm. Ntshuam cov npe hauv qab no los siv cov ntaub ntawv annotation hauv daim ntawv thov.
Cov ntaub ntawv annotation yog dab tsi?
Cov lus piav qhia yog cov cwj pwm uas siv rau cov chav kawm lossis cov tswv cuab uas qhia txog kev siv tau cov cai, qhia meej tias yuav ua li cas cov ntaub ntawv tau nthuav tawm, thiab teeb tsa kev sib raug zoo ntawm cov chav kawm. Qhov System. ComponentModel. Cov ntaub ntawv namespace muaj cov chav kawm uas siv los ua cov ntaub ntawv yam ntxwv.
Pom zoo:
Dab tsi yog cov ntaub ntawv hloov pauv hauv cov ntaub ntawv khaws cia?
Cov ntaub ntawv hloov pauv yog cov ntaub ntawv uas tau tsim nyob rau hauv daim ntawv thov kev sib ntsib, uas tsis tau khaws cia hauv cov ntaub ntawv tom qab daim ntawv thov raug txiav
Dab tsi yog kev noj cov ntaub ntawv hauv cov ntaub ntawv loj?
Cov ntaub ntawv ingestion yog tus txheej txheem ntawm tau txais thiab import cov ntaub ntawv rau tam sim ntawd siv los yog cia nyob rau hauv ib tug database. Txhawm rau noj ib yam dab tsi yog 'coj ib yam dab tsi los yog nqus ib yam dab tsi.' Cov ntaub ntawv tuaj yeem xa tawm hauv lub sijhawm tiag tiag lossis noj hauv cov khoom siv
Dab tsi yog cov ntaub ntawv thev naus laus zis hauv kev tswj cov ntaub ntawv xov xwm?
Kev tswj cov ntaub ntawv xov xwm (MIS) yog hais txog cov txheej txheem loj siv los ntawm kev lag luam lossis kev lag luam, thaum cov ntaub ntawv thev naus laus zis (IT) yog ib feem ntawm cov txheej txheem uas siv los sau thiab xa cov ntaub ntawv. Cov Ntaub Ntawv Technology txhawb nqa thiab pab txhawb kev ua haujlwm ntawm qhov system ntawd
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj