RemoveEntry Method (entry)

DotNetZip

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Ionic Zip Library v1.9.1.6 RemoveEntry Method (entry)

Removes the given ZipEntry from the zip archive.

Declaration Syntax

Visual Basic

Visual C++

public void RemoveEntry(
	ZipEntry entry
)

Public Sub RemoveEntry ( _
	entry As ZipEntry _
)

public:
void RemoveEntry(
	ZipEntry^ entry
)

Parameters

entry (ZipEntry): The ZipEntry to remove from the zip.

Remarks

After calling RemoveEntry, the application must call Save to make the changes permanent.

Examples

In this example, all entries in the zip archive dating from before December 31st, 2007, are removed from the archive. This is actually much easier if you use the RemoveSelectedEntries method. But I needed an example for RemoveEntry, so here it is.

CopyC#

String ZipFileToRead = "ArchiveToModify.zip";
System.DateTime Threshold = new System.DateTime(2007,12,31);
using (ZipFile zip = ZipFile.Read(ZipFileToRead))
{
  var EntriesToRemove = new System.Collections.Generic.List<ZipEntry>();
  foreach (ZipEntry e in zip)
  {
    if (e.LastModified < Threshold)
    {
      // We cannot remove the entry from the list, within the context of
      // an enumeration of said list.
      // So we add the doomed entry to a list to be removed later.
      EntriesToRemove.Add(e);
    }
  }

  // actually remove the doomed entries.
  foreach (ZipEntry zombie in EntriesToRemove)
    zip.RemoveEntry(zombie);

  zip.Comment= String.Format("This zip archive was updated at {0}.",
                             System.DateTime.Now.ToString("G"));

  // save with a different name
  zip.Save("Archive-Updated.zip");
}

CopyVB.NET

Dim ZipFileToRead As String = "ArchiveToModify.zip"
Dim Threshold As New DateTime(2007, 12, 31)
Using zip As ZipFile = ZipFile.Read(ZipFileToRead)
    Dim EntriesToRemove As New System.Collections.Generic.List(Of ZipEntry)
    Dim e As ZipEntry
    For Each e In zip
        If (e.LastModified < Threshold) Then
            ' We cannot remove the entry from the list, within the context of
            ' an enumeration of said list.
            ' So we add the doomed entry to a list to be removed later.
            EntriesToRemove.Add(e)
        End If
    Next

    ' actually remove the doomed entries.
    Dim zombie As ZipEntry
    For Each zombie In EntriesToRemove
        zip.RemoveEntry(zombie)
    Next
    zip.Comment = String.Format("This zip archive was updated at {0}.", DateTime.Now.ToString("G"))
    'save as a different name
    zip.Save("Archive-Updated.zip")
End Using

Exceptions

Exception	Condition
ArgumentException	Thrown if the specified ZipEntry does not exist in the ZipFile.