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POUnzip a zip file in silverlight
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15639458
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CreationDate
2013-03-26T14:22:10.950
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2013-04-03T16:30:36.913
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2013-03-26T15:24:11.520
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Body
I am trying to develop code to unzip file from the zip file in Silverlight 5. The files are in a directory within the zip file. I translated this code I found elsewhere from c# to VB since we are a VB shop. It is failing on the fourth line "Object reference not set to an instance of an object.". I realize now that the problem is that the third line is expecting a relative uri and I am passing it a file, but I don't know how to fix this. Can you tell me what is wrong with this code. I will also welcome other ideas. Thanks. <pre><code>Public Shared Function GetZipContents(ByVal filename As String) As String() Try Dim zipStream As System.IO.Stream = New System.IO.MemoryStream() Dim zipInfo As New StreamResourceInfo(zipStream, Nothing) Dim streamInfo As StreamResourceInfo = Application.GetResourceStream(zipInfo, New Uri(filename, UriKind.Relative)) Dim fileStream As Stream = streamInfo.Stream Dim names As New List(Of String)() Dim reader As New BinaryReader(fileStream) Do While reader.ReadUInt32() = &H4034B50 ' Skip the portions of the header we don't care about reader.BaseStream.Seek(14, SeekOrigin.Current) Dim compressedSize As UInteger = reader.ReadUInt32() Dim uncompressedSize As UInteger = reader.ReadUInt32() Dim nameLength As Integer = reader.ReadUInt16() Dim extraLength As Integer = reader.ReadUInt16() Dim nameBytes() As Byte = reader.ReadBytes(nameLength) names.Add(Encoding.UTF8.GetString(nameBytes, 0, nameLength)) reader.BaseStream.Seek(extraLength + compressedSize, SeekOrigin.Current) Loop ' Move the stream back to the begining fileStream.Seek(0, SeekOrigin.Begin) Return names.ToArray() Catch ex As Exception MessageBox.Show(ex.Message) Return Nothing End Try End Function </code></pre>
Tags
<silverlight><zip><silverlight-5.0>
Title
Unzip a zip file in silverlight
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