//We do the close or the flush operation per part
private void DoOperationOnEachPart(PartOperation operation)
{
//foreach (PackagePart p in _partList.Values)
// p.Close(); - this throws
// Make local copy of part names to prevent exception during enumeration when
// a new relationship part gets created (flushing relationships can cause part creation).
// This code throws in such a case:
//
// foreach (PackagePart p in _partList.Values)
// p.Flush();
//
if (_partList.Count > 0)
{
int partCount = 0;
PackUriHelper.ValidatedPartUri[] partKeys = new PackUriHelper.ValidatedPartUri[_partList.Keys.Count];
foreach (PackUriHelper.ValidatedPartUri uri in _partList.Keys)
{
partKeys[partCount++] = uri;
}
// this throws an exception in certain cases (when a part has been deleted)
//
// _partList.Keys.CopyTo(keys, 0);
for (int i = 0; i < _partList.Keys.Count; i++)
{
// Some of these may disappear during above close because the list contains "relationship parts"
// and these are removed if their parts' relationship collection is empty
// This fails:
// _partList[keys[i]].Flush();
PackagePart p;
if (_partList.TryGetValue(partKeys[i], out p))
{
if (!operation(p))
break;
}
}
}
}
protected PackagePart(Package package, Uri partUri, string contentType, CompressionOption compressionOption)
{
this._compressionOption = CompressionOption.NotCompressed;
if (package == null)
{
throw new ArgumentNullException("package");
}
if (partUri == null)
{
throw new ArgumentNullException("partUri");
}
Package.ThrowIfCompressionOptionInvalid(compressionOption);
this._uri = PackUriHelper.ValidatePartUri(partUri);
this._container = package;
if (contentType == null)
{
this._contentType = null;
}
else
{
this._contentType = new ContentType(contentType);
}
this._requestedStreams = null;
this._compressionOption = compressionOption;
this._isRelationshipPart = PackUriHelper.IsRelationshipPartUri(partUri);
}
