This topic demonstrates how to compress a file using the static GZip method of the QuickGZip class, specifying several parameters.
QuickGZip is not currently available in Xceed's Compact Framework products.
GZip method
The GZip method has a few overloads that can be used to compress files. For details on the other overloads, see the reference documentation.
Demonstration
In the following example, we specify several parameters and also use some callbacks.
VB.NET
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Imports Xceed.GZip
QuickGZip.GZip("d:\test.gz", True, New QuickGZip.ByteProgressionCallback(Me.OnByteProgression), _ New QuickGZip.ItemProgressionCallback(Me.OnItemProgression), Nothing, _ "d:\testDR\test.txt")
Public Sub OnByteProgression(ByVal currrentItemName As String, _ ByVal currentItemsByteProcessed As Long, _ ByVal currentItemTotalBytes As Long, _ ByVal currentItemPercent As Long, _ ByVal allItemsByteProcessed As Long, _ ByVal allItemsTotalBytes As Long, _ ByVal allItemsPercent As Byte, ByVal userParams As Object) 'Do stuff
End Sub
Public Sub OnItemProgression(ByVal currentItemName As String, ByVal itemProcessed As Long, _ ByVal totalItemCount As Long, ByVal totalItemPercent As Byte, _ ByVal abort As Boolean, ByVal userParams As Object) 'Do stuff End Sub
C#
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using Xceed.GZip;
QuickGZip.GZip(@"d:\test.gz", true, new QuickGZip.ByteProgressionCallback(this.OnByteProgression), new QuickGZip.ItemProgressionCallback(this.OnItemProgression), null, @"d:\testDR\test.txt");
public void OnByteProgression( string currentItemName, long currentItemsByteProcessed, long currentItemTotalBytes, byte currentItemPercent, long allItemsByteProcessed, long allItemsTotalBytes, byte allItemsPercent, object userParams) { //Do stuff }
public void OnItemProgression( string currentItemName, long itemProcessed, long totalItemCount, byte totalItemPercent, ref bool abort, object userParams) { //Do stuff }
Remarks
QuickGZip only supports single file compression because although the compression process allows compression of multiple files, the content of the entire GZip file must first be uncompressed before adding additional files to the GZip file.
Things you should consider
The main questions you should ask yourself when compressing items with GZip are:
Do you want to do more complex GZip operations? Use the FileSystem-based classes defined within the Xceed.GZip namespace.
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