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VB.NET 压缩解压缩字符串

发布于 2024-09-02 19:04:21 字数 72 浏览 5 评论 0原文

如何在 VB.NET 中压缩/解压缩字符串？我正在尝试通过网络发送长字符串，并在发送之前需要它们尽可能小。

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岁月静好 2024-09-09 19:04:21

您可以使用 GzipStream。

这是一个例子：

//Compress
Dim mem As New IO.MemoryStream
Dim gz As New System.IO.Compression.GZipStream(mem, IO.Compression.CompressionMode.Compress)
Dim sw As New IO.StreamWriter(gz)
sw.WriteLine("hello compression")
sw.Close()

//Decompress
Dim mem2 As New IO.MemoryStream(mem.ToArray)
gz = New System.IO.Compression.GZipStream(mem2, IO.Compression.CompressionMode.Decompress)
Dim sr As New IO.StreamReader(gz)
MsgBox(sr.ReadLine)
sr.Close()

2年后编辑...

这对我来说不太有效，也许是因为我需要将数据存储在字节数组中。这适用于压缩：

'Compress
 Dim mem As New IO.MemoryStream
 Dim gz As New System.IO.Compression.GZipStream(mem, IO.Compression.CompressionMode.Compress)
 Dim sw As New IO.StreamWriter(gz)
 sw.Write(value)
 mem.Seek(0, IO.SeekOrigin.Begin)
 Dim sr As New IO.BinaryReader(mem)
 _zippedXML = sr.ReadBytes(CInt(mem.Length))
 sw.Close()

然后对于解压缩，我只是将字节数组传递到 mem2 的构造函数而不是 mem.ToArray 中。

You could use GzipStream.

Here is an example:

//Compress
Dim mem As New IO.MemoryStream
Dim gz As New System.IO.Compression.GZipStream(mem, IO.Compression.CompressionMode.Compress)
Dim sw As New IO.StreamWriter(gz)
sw.WriteLine("hello compression")
sw.Close()

//Decompress
Dim mem2 As New IO.MemoryStream(mem.ToArray)
gz = New System.IO.Compression.GZipStream(mem2, IO.Compression.CompressionMode.Decompress)
Dim sr As New IO.StreamReader(gz)
MsgBox(sr.ReadLine)
sr.Close()

edit 2 years later...

That didn't quite work for me, perhaps because I needed to store the data in a byte array. This worked for Compress:

'Compress
 Dim mem As New IO.MemoryStream
 Dim gz As New System.IO.Compression.GZipStream(mem, IO.Compression.CompressionMode.Compress)
 Dim sw As New IO.StreamWriter(gz)
 sw.Write(value)
 mem.Seek(0, IO.SeekOrigin.Begin)
 Dim sr As New IO.BinaryReader(mem)
 _zippedXML = sr.ReadBytes(CInt(mem.Length))
 sw.Close()

Then for Decompress I just passed the byte array into the constructor of mem2 instead of mem.ToArray.

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