/// <summary>
/// Call this during ModifyData. This returns the file collection ID of the existing or just-inserted file collection.
/// This will return an ID even if there are 0 files in the collection (in other words, no file). No file should always be
/// represented by a non-null file collection ID which happens to have 0 files in it. Null file collection IDs are not supported.
/// </summary>
public int ModifyData()
{
if (fileCollectionId == null)
{
fileCollectionId = BlobFileOps.SystemProvider.InsertFileCollection();
}
var rsFile = uploadedFile.GetPostBackValue(AppRequestState.Instance.EwfPageRequestState.PostBackValues);
if (rsFile != null)
{
BlobFileOps.SystemProvider.DeleteFilesLinkedToFileCollection(fileCollectionId.Value);
BlobFileOps.SystemProvider.InsertFile(fileCollectionId.Value, rsFile.FileName, rsFile.Contents, BlobFileOps.GetContentTypeForPostedFile(rsFile));
}
return(fileCollectionId.Value);
}
private ControlList getUploadControlList()
{
var dm = PostBack.CreateFull(id: PostBack.GetCompositeId(postBackIdBase, "add"));
RsFile file = null;
var fi = FormItem.Create(
"",
new EwfFileUpload(),
validationGetter: control => new EwfValidation(
(pbv, validator) => {
BlobFileOps.ValidateUploadedFile(validator, control, acceptableFileExtensions, ValidateImage, AcceptOnlyImages);
file = control.GetPostBackValue(pbv);
},
dm));
dm.AddModificationMethod(
() => {
if (file == null)
{
return;
}
var existingFile = files.SingleOrDefault(i => i.FileName == file.FileName);
int newFileId;
if (existingFile != null)
{
BlobFileOps.SystemProvider.UpdateFile(existingFile.FileId, file.FileName, file.Contents, BlobFileOps.GetContentTypeForPostedFile(file));
newFileId = existingFile.FileId;
}
else
{
newFileId = BlobFileOps.SystemProvider.InsertFile(fileCollectionId, file.FileName, file.Contents, BlobFileOps.GetContentTypeForPostedFile(file));
}
if (NewFileNotificationMethod != null)
{
NewFileNotificationMethod(newFileId);
}
EwfPage.AddStatusMessage(StatusMessageType.Info, "File uploaded successfully.");
});
return(ControlList.CreateWithControls(
true,
"Select and upload a new file:",
fi.ToControl(),
new PostBackButton(dm, new ButtonActionControlStyle("Upload new file"), false)));
}