// NOTE: EVERYTHING should be done here. We shouldn't have LoadData. We should audit everyone using this control and see if we can improve things.
// NOTE: This should also be full of delegates that run when events (such as deleting a file) are occurring.
// NOTE: There should be a way to tell if a file was uploaded.
void ControlTreeDataLoader.LoadData()
{
if (fileCollectionId != null)
{
file = BlobFileOps.GetFirstFileFromCollection(fileCollectionId.Value);
}
var controlStack = ControlStack.Create(true);
if (file != null)
{
var download = new PostBackButton(
PostBack.CreateFull(
id: PostBack.GetCompositeId("ewfFile", file.FileId.ToString()),
actionGetter: () => {
// Refresh the file here in case a new one was uploaded on the same post-back.
return
(new PostBackAction(
new SecondaryResponse(new BlobFileResponse(BlobFileOps.GetFirstFileFromCollection(fileCollectionId.Value).FileId, () => true), false)));
}),
new TextActionControlStyle(Translation.DownloadExisting + " (" + file.FileName + ")"),
false);
controlStack.AddControls(download);
}
else if (!HideNoExistingFileMessage)
{
controlStack.AddControls(new Label {
Text = Translation.NoExistingFile
});
}
uploadedFile = new EwfFileUpload();
if (file != null)
{
uploadedFile.SetInitialDisplay(false);
var replaceExistingFileLink = new ToggleButton(
uploadedFile.ToSingleElementArray(),
new TextActionControlStyle(Translation.ClickHereToReplaceExistingFile))
{
AlternateText = ""
};
controlStack.AddControls(replaceExistingFileLink);
}
controlStack.AddControls(uploadedFile);
var thumbnailControl = BlobFileOps.GetThumbnailControl(file, ThumbnailResourceInfoCreator);
if (thumbnailControl != null)
{
Controls.Add(thumbnailControl);
}
Controls.Add(controlStack);
}
public BlobFileManager(int?fileCollectionId)
{
this.fileCollectionId = fileCollectionId;
if (fileCollectionId != null)
{
file = BlobFileOps.GetFirstFileFromCollection(fileCollectionId.Value);
}
var controlStack = ControlStack.Create(true);
if (file != null)
{
var download = new PostBackButton(
new TextActionControlStyle(Translation.DownloadExisting + " (" + file.FileName + ")"),
usesSubmitBehavior: false,
postBack: PostBack.CreateFull(
id: PostBack.GetCompositeId("ewfFile", file.FileId.ToString()),
actionGetter: () => {
// Refresh the file here in case a new one was uploaded on the same post-back.
return
(new PostBackAction(
new SecondaryResponse(new BlobFileResponse(BlobFileOps.GetFirstFileFromCollection(fileCollectionId.Value).FileId, () => true), false)));
}));
controlStack.AddControls(download);
}
else if (!HideNoExistingFileMessage)
{
controlStack.AddControls(new Label {
Text = Translation.NoExistingFile
});
}
uploadedFile = new EwfFileUpload();
if (file != null)
{
uploadedFile.SetInitialDisplay(false);
var replaceExistingFileLink = new ToggleButton(
uploadedFile.ToCollection(),
new TextActionControlStyle(Translation.ClickHereToReplaceExistingFile),
false,
(postBackValue, validator) => { })
{
AlternateText = ""
};
controlStack.AddControls(replaceExistingFileLink);
}
controlStack.AddControls(uploadedFile);
this.AddControlsReturnThis(BlobFileOps.GetThumbnailControl(file, ThumbnailResourceInfoCreator));
Controls.Add(controlStack);
}
/// <summary>
/// Uploaded file cannot be null. But if uploadedFile.HasFile is false, this will be a no-op.
/// Pass null for acceptableFileExtensions if there is no restriction on file extension.
/// PerformAdditionalImageValidation cannot be null but may be an empty delegate.
/// </summary>
public static void ValidateUploadedFile(
Validator validator, EwfFileUpload uploadedFile, string[] acceptableFileExtensions, Action <Validator, System.Drawing.Image> performAdditionalImageValidation,
bool mustBeRenderableImage)
{
var file = uploadedFile.GetPostBackValue(AppRequestState.Instance.EwfPageRequestState.PostBackValues);
if (file == null)
{
return;
}
// Perform generic file validation.
if (acceptableFileExtensions != null && !FileExtensions.MatchesAGivenExtension(file.FileName, acceptableFileExtensions))
{
validator.NoteErrorAndAddMessage(Translation.UnacceptableFileExtension + " " + acceptableFileExtensions.GetCommaDelimitedStringFromCollection());
// Don't bother trying to see if it's an image and parse the image. The file extension message be more detailed than the messages those errors produce.
return;
}
// Perform image-specific validation if necessary.
if (mustBeRenderableImage)
{
// Make sure it is an image according to its content type.
if (!ContentTypes.IsImageType(GetContentTypeForPostedFile(file)))
{
validator.NoteErrorAndAddMessage("Please upload a valid image file.");
}
else
{
// Make sure it is an image type that we understand. Also perform optional custom validation.
try {
using (var stream = new MemoryStream(file.Contents)) {
var image = System.Drawing.Image.FromStream(stream);
performAdditionalImageValidation(validator, image);
}
}
catch (ArgumentException) {
// If we end up in this catch block, it means that System.Drawing.Image does not understand our image. Since we already know that our content type
// is image at this point, this usually means that the file is some sort of unsupported image format, like NEF.
validator.NoteErrorAndAddMessage("The uploaded image file is in an unsupported format.");
}
}
}
}
// NOTE: EVERYTHING should be done here. We shouldn't have LoadData. We should audit everyone using this control and see if we can improve things.
// NOTE: This should also be full of delegates that run when events (such as deleting a file) are occurring.
// NOTE: There should be a way to tell if a file was uploaded.
void ControlTreeDataLoader.LoadData()
{
if( fileCollectionId != null )
file = BlobFileOps.GetFirstFileFromCollection( fileCollectionId.Value );
var controlStack = ControlStack.Create( true );
if( file != null ) {
var download = new PostBackButton(
PostBack.CreateFull(
id: PostBack.GetCompositeId( "ewfFile", file.FileId.ToString() ),
actionGetter: () => {
// Refresh the file here in case a new one was uploaded on the same post-back.
return
new PostBackAction(
new SecondaryResponse( new BlobFileResponse( BlobFileOps.GetFirstFileFromCollection( fileCollectionId.Value ).FileId, () => true ), false ) );
} ),
new TextActionControlStyle( Translation.DownloadExisting + " (" + file.FileName + ")" ),
false );
controlStack.AddControls( download );
}
else if( !HideNoExistingFileMessage )
controlStack.AddControls( new Label { Text = Translation.NoExistingFile } );
uploadedFile = new EwfFileUpload();
if( file != null ) {
uploadedFile.SetInitialDisplay( false );
var replaceExistingFileLink = new ToggleButton(
uploadedFile.ToSingleElementArray(),
new TextActionControlStyle( Translation.ClickHereToReplaceExistingFile ) ) { AlternateText = "" };
controlStack.AddControls( replaceExistingFileLink );
}
controlStack.AddControls( uploadedFile );
var thumbnailControl = BlobFileOps.GetThumbnailControl( file, ThumbnailResourceInfoCreator );
if( thumbnailControl != null )
Controls.Add( thumbnailControl );
Controls.Add( controlStack );
}
/// <summary>
/// Uploaded file cannot be null. But if uploadedFile.HasFile is false, this will be a no-op.
/// Pass null for acceptableFileExtensions if there is no restriction on file extension.
/// PerformAdditionalImageValidation cannot be null but may be an empty delegate.
/// </summary>
public static void ValidateUploadedFile(
Validator validator, EwfFileUpload uploadedFile, string[] acceptableFileExtensions, Action<Validator, System.Drawing.Image> performAdditionalImageValidation,
bool mustBeRenderableImage)
{
var file = uploadedFile.GetPostBackValue( AppRequestState.Instance.EwfPageRequestState.PostBackValues );
if( file == null )
return;
// Perform generic file validation.
if( acceptableFileExtensions != null && !FileExtensions.MatchesAGivenExtension( file.FileName, acceptableFileExtensions ) ) {
validator.NoteErrorAndAddMessage( Translation.UnacceptableFileExtension + " " + acceptableFileExtensions.GetCommaDelimitedStringFromCollection() );
// Don't bother trying to see if it's an image and parse the image. The file extension message be more detailed than the messages those errors produce.
return;
}
// Perform image-specific validation if necessary.
if( mustBeRenderableImage ) {
// Make sure it is an image according to its content type.
if( !ContentTypes.IsImageType( GetContentTypeForPostedFile( file ) ) )
validator.NoteErrorAndAddMessage( "Please upload a valid image file." );
else {
// Make sure it is an image type that we understand. Also perform optional custom validation.
try {
using( var stream = new MemoryStream( file.Contents ) ) {
var image = System.Drawing.Image.FromStream( stream );
performAdditionalImageValidation( validator, image );
}
}
catch( ArgumentException ) {
// If we end up in this catch block, it means that System.Drawing.Image does not understand our image. Since we already know that our content type
// is image at this point, this usually means that the file is some sort of unsupported image format, like NEF.
validator.NoteErrorAndAddMessage( "The uploaded image file is in an unsupported format." );
}
}
}
}
