ZipArchive.GetEntry(String) 方法

定義

命名空間:

System.IO.Compression

組件:

System.IO.Compression.dll

來源:

ZipArchive.cs

在 zip 封存中擷取指定項目的包裝函式。

public:
 System::IO::Compression::ZipArchiveEntry ^ GetEntry(System::String ^ entryName);

public System.IO.Compression.ZipArchiveEntry? GetEntry (string entryName);

member this.GetEntry : string -> System.IO.Compression.ZipArchiveEntry

Public Function GetEntry (entryName As String) As ZipArchiveEntry

參數

entryName

String

識別要擷取之項目的路徑 (相對於封存的根目錄)。

傳回

ZipArchiveEntry

封存中之指定項目的包裝函式，如果項目不存在於封存中則為 null。

例外狀況

ArgumentException

entryName 為 Empty。

ArgumentNullException

entryName 為 null。

NotSupportedException

Zip 封存不支援讀取。

ObjectDisposedException

Zip 封存已經處置。

InvalidDataException

Zip 封存已損毀，且無法擷取它的項目。

範例

下列範例示範如何使用 GetEntry 方法來擷取專案。

using System;
using System.IO;
using System.IO.Compression;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string zipPath = @"c:\example\result.zip";

            using (ZipArchive archive = ZipFile.Open(zipPath, ZipArchiveMode.Update))
            {
                ZipArchiveEntry entry = archive.GetEntry("ExistingFile.txt");
                using (StreamWriter writer = new StreamWriter(entry.Open()))
                {
                    writer.BaseStream.Seek(0, SeekOrigin.End);
                    writer.WriteLine("append line to file");
                }
                entry.LastWriteTime = DateTimeOffset.UtcNow.LocalDateTime;
            }
        }
    }
}

open System
open System.IO
open System.IO.Compression

[<EntryPoint>]
let main _ =
    let zipPath = @"c:\example\result.zip"

    use archive = ZipFile.Open(zipPath, ZipArchiveMode.Update)

    let entry = archive.GetEntry "ExistingFile.txt"
    use writer = new StreamWriter(entry.Open())

    writer.BaseStream.Seek(0, SeekOrigin.End) |> ignore
    writer.WriteLine "append line to file"

    entry.LastWriteTime <- DateTimeOffset.UtcNow.LocalDateTime
    0

Imports System.IO
Imports System.IO.Compression

Module Module1

    Sub Main()
        Dim zipPath As String = "c:\example\result.zip"

        Using archive As ZipArchive = ZipFile.Open(zipPath, ZipArchiveMode.Update)
            Dim entry As ZipArchiveEntry = archive.GetEntry("ExistingFile.txt")

            Using writer As StreamWriter = New StreamWriter(entry.Open())
                writer.BaseStream.Seek(0, SeekOrigin.End)
                writer.WriteLine("append line to file")
            End Using
            entry.LastWriteTime = DateTimeOffset.UtcNow.LocalDateTime
        End Using
    End Sub

End Module

備註

如果有多個具有指定名稱的專案存在於封存中，則會傳回第一個專案。 專案的名稱會 entryName 與使用序數比較進行比較。