SQL Server

Find a ZIP Entry by EntryID Using EntryById

See more Zip Examples

This example demonstrates how to use the EntryById method to retrieve a ZIP entry using its unique EntryID.

Each ZipEntry object has an EntryID property that uniquely identifies the entry within the currently open ZIP object.

This is useful when:

• An application stores EntryID values for later use
• ZIP entries need to be retrieved without searching by filename
• Multiple entries may have similar names or paths

The example:

• Opens a ZIP archive
• Retrieves an entry using EntryAt
• Saves the entry's EntryID
• Uses EntryById to retrieve the same entry later

SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    SELECT @success = 0

    -- Open an existing ZIP archive.
    DECLARE @zip int
    EXEC @hr = sp_OACreate 'Chilkat.Zip', @zip OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @zip, 'OpenZip', @success OUT, 'example.zip'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        RETURN
      END

    -- Retrieve the first entry in the ZIP archive.
    DECLARE @entry int
    EXEC @hr = sp_OACreate 'Chilkat.ZipEntry', @entry OUT

    EXEC sp_OAMethod @zip, 'EntryAt', @success OUT, 0, @entry
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @entry
        RETURN
      END


    PRINT 'Original entry:'

    EXEC sp_OAGetProperty @entry, 'FileName', @sTmp0 OUT
    PRINT '  FileName: ' + @sTmp0

    EXEC sp_OAGetProperty @entry, 'EntryID', @iTmp0 OUT
    PRINT '  EntryID: ' + @iTmp0

    PRINT ''

    -- Save the EntryID for later use.
    DECLARE @entryId int
    EXEC sp_OAGetProperty @entry, 'EntryID', @entryId OUT

    -- Create another ZipEntry object.
    DECLARE @entry2 int
    EXEC @hr = sp_OACreate 'Chilkat.ZipEntry', @entry2 OUT

    -- Retrieve the same entry using EntryById.
    EXEC sp_OAMethod @zip, 'EntryById', @success OUT, @entryId, @entry2
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @zip, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @zip
        EXEC @hr = sp_OADestroy @entry
        EXEC @hr = sp_OADestroy @entry2
        RETURN
      END


    PRINT 'Entry retrieved by EntryID:'

    EXEC sp_OAGetProperty @entry2, 'FileName', @sTmp0 OUT
    PRINT '  FileName: ' + @sTmp0

    EXEC sp_OAGetProperty @entry2, 'EntryID', @iTmp0 OUT
    PRINT '  EntryID: ' + @iTmp0

    PRINT ''

    -- The filenames and EntryID values should match.
    EXEC sp_OAMethod @zip, 'CloseZip', NULL


    PRINT 'Done.'

    EXEC @hr = sp_OADestroy @zip
    EXEC @hr = sp_OADestroy @entry
    EXEC @hr = sp_OADestroy @entry2


END
GO