文件压缩 GZipStream ,解压后文件扩展名丢失
我想压缩文件 比如 Text.txt . 我想压缩后得到Text.zip 文件，解压后可以得到Text.txt 文件，可是我怎么一直得到Text 文件没有扩展名.txt .
下面是我的代码：
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim openFileDialog1 As New OpenFileDialog()
'openFileDialog1.InitialDirectory = "c:\"
openFileDialog1.Filter = "All files (*.*)|*.*"
openFileDialog1.RestoreDirectory = True
If openFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then
Dim fileContents As Byte()
fileContents = My.Computer.FileSystem.ReadAllBytes(openFileDialog1.FileName)
Dim filename As String = openFileDialog1.FileName '& ".zip"
filename = filename.Substring(0, filename.LastIndexOf("."))
filename = filename & ".zip"
If File.Exists(filename) Then File.Delete(filename)
Dim fs As FileStream = New FileStream(filename, FileMode.CreateNew, FileAccess.Write)
Dim compressed_Data As Byte()
compressed_Data = Compress(fileContents)
If compressed_Data IsNot Nothing Then
fs.Write(compressed_Data, 0, compressed_Data.Length)
fs.Close()
End If
End If
End Sub
Public Function Compress(ByVal data() As Byte) As Byte()
Try
Dim ms As New System.IO.MemoryStream()
Dim zipStream As Stream = Nothing
zipStream = New GZipStream(ms, CompressionMode.Compress, True)
zipStream.Write(data, 0, data.Length)
zipStream.Close()
ms.Position = 0
Dim c_data(ms.Length - 1) As Byte
ms.Read(c_data, 0, ms.Length)
Return c_data
Catch ex As Exception
End Try
End Function
[解决办法]
GZipStream没用过，我用的unzip没有发现这样问题，建议换为Unzip吧
[解决办法]
/// <summary> /// 压缩文件 /// </summary> /// <param name="filepath"></param> public static void CreateZipFile(string filepath) { using (FileStream fs = new FileStream(filepath,FileMode.Open)) { byte[] bytes = new byte[fs.Length]; fs.Read(bytes, 0, bytes.Length); using (FileStream outfile = File.Create(Path.ChangeExtension(filepath, "zip"))) { using (GZipStream zipStream = new GZipStream(outfile, CompressionMode.Compress)) { zipStream.Write(bytes, 0, bytes.Length); } } } } /// <summary> /// 解压缩文件 /// </summary> /// <param name="filepath"></param> public static void DeCompressZipFile(string filepath,string extension) { using (FileStream infile = File.OpenRead(filepath)) { using (DeflateStream deflateStream = new DeflateStream(infile, CompressionMode.Decompress)) { byte[] buffer = new byte[infile.Length + 100]; int offset = 0; int totalCount = 0; while (true) { int bytesRead = deflateStream.Read(buffer, offset, 100); if (bytesRead == 0) { break; } offset += bytesRead; totalCount += bytesRead; } using (FileStream outfile = File.Create(Path.ChangeExtension(filepath, extension))) { outfile.Write(buffer, 0, buffer.Length); } } } }