Video: Qhov kev zam ToString puas suav nrog kev zam sab hauv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
ToString () yuav qhia cov kev zam ntaus ntawv, lus, ntxiv rau tej sab hauv kev zam . Qhov ntawd yog tsis tas li ntawd! Yog FaultException yog a InnerException ntawm, piv txwv li, ib qho System.
Nyob rau hauv txoj kev no, dab tsi yog qhov kev zam sab hauv?
Ib sab hauv kev zam yog cov kev zam uas ua rau tam sim no kev zam . Nws yog siv nyob rau hauv rooj plaub thaum koj xav nto qhov sib txawv kev zam tshaj qhov uas koj tus lej ntes tau tab sis koj tsis xav pov tseg cov ntsiab lus qub.
sab hauv kev zam tuaj yeem yog null? Cov InnerException cov cuab yeej rov qab tus nqi tib yam li tau dhau mus rau hauv Kev zam (Txoj hlua, Kev zam ) constructor, los yog null yog tias sab hauv kev zam tus nqi tsis tau muab rau tus tsim.
Ib yam li ntawd, qhov kev zam ToString rov qab los li cas?
ToString rov qab los ib tug sawv cev ntawm tam sim no kev zam uas yog xav kom neeg to taub. Qhov twg kev zam muaj cov kab lis kev cai-sensitive cov ntaub ntawv, cov hlua sawv cev rov qab los los ntawm ToString yog yuav tsum coj mus rau hauv tus account tam sim no kab lis kev cai.
Dab tsi yog tsab ntawv zam?
Kev khaws cia a lus hauv kev zam khoom yog ib txoj hauv kev ntxiv cov ntaub ntawv rau lub kev zam . Kev zam yuav tsum tau siv los sib tham txog qhov yuam kev uas tau tshwm sim. Kev zam feem ntau tshwm sim los ntawm kev ua yuam kev hauv kev ua haujlwm.
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