File stream class yog dab tsi?
File stream class yog dab tsi?

Video: File stream class yog dab tsi?

Video: File stream class yog dab tsi?
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Rau kev khiav hauj lwm directory thiab lwm yam ntaub ntawv kev ua haujlwm, saib cov Cov ntaub ntawv , Phau Ntawv Qhia, thiab Txoj Kev chav kawm . Cov Cov ntaub ntawv chav kawm yog ib qho khoom siv chav kawm uas muaj static txoj kev feem ntau rau cov creation ntawm FileStream khoom raws li ntaub ntawv txoj kev. Lub MemoryStream chav kawm tsim ib ntws los ntawm ib tug byte array thiab zoo ib yam li cov FileStream chav kawm.

Yog li ntawd, cov ntaub ntawv yog dab tsi yog cov ntaub ntawv kwj cov chav kawm piav qhia?

A cov ntaub ntawv ntws tuaj yeem yog txhais siv cov chav kawm ifstream, ofstream thiab fstream uas muaj nyob rau hauv header ntaub ntawv fstream. Cov chav kawm yuav tsum tau siv nyob ntawm lub hom phiaj seb cov ntaub ntawv sau los yog nyeem cov ntaub ntawv yuav tsum tau ua nyob rau hauv ntaub ntawv . A ntaub ntawv tuaj yeem qhib tau ob txoj hauv kev: Siv tus tsim ua haujlwm ntawm chav kawm.

Kuj Paub, dab tsi yog cov ntaub ntawv kwj khoom? Cias muab tso, FileInputStream (FileOutputStream) sawv cev rau kev tawm tswv yim (tso tawm) ntws ntawm a ntaub ntawv uas nyob ntawm haiv neeg ntaub ntawv qhov system. Koj tuaj yeem tsim ib qho cov ntaub ntawv ntws los ntawm filename, a Cov ntaub ntawv , los yog FileDescriptor. khoom . Siv cov ntaub ntawv ntws nyeem cov ntaub ntawv los yog sau cov ntaub ntawv rau cov ntaub ntawv ntawm ntaub ntawv qhov system.

Ntxiv mus, dab tsi yog chav kawm streaming?

Cov kwj hoob txhais cov khoom uas lees txais ib ntu ntawm cov cim. Kwj kuj yuav muaj qhov tso zis nyob rau hauv rooj plaub ntau ntws cov khoom yuav raug cascaded los tsim ib ntws yeeb nkab qhov tso zis ntawm a ntws yog coj mus rau hauv lub tswv yim ntawm cov tom ntej ntws object "down the line".

Qhov txawv ntawm kwj thiab MemoryStream yog dab tsi?

Kwj yog ib tug sawv cev ntawm bytes. Ob chav kawm no muab los ntawm cov Kwj chav kawm uas yog abstract los ntawm kev txhais. Raws li lub npe qhia, FileStream nyeem thiab sau rau hauv cov ntaub ntawv whereas a MemoryStream nyeem thiab sau rau lub cim xeeb. Yog li nws hais txog qhov twg ntws yog khaws cia.

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