public override bool IsValid(object value)
{
if (Height < 1 && Width < 1)
{
ErrorMessage = "The allowed image height or image width must be specified within the validation attribute";
return(false);
}
var contentReference = value as ContentReference;
if (contentReference == null)
{
ErrorMessage = "RequiredImageSize attribute should only be applied to ContentReference properties";
return(false);
}
var content = ServiceLocator.Current.GetInstance <IContentLoader>().Get <ContentData>(contentReference);
if (content == null)
{
ErrorMessage = "The content selected for property '{0}' cannot be found!";
return(false);
}
var imageData = content as IContentImage;
if (imageData == null)
{
ErrorMessage = "RequiredImageSize attribute applied to property '{0}' can only be applied to ContentReferences that inherit from IContentImage";
return(false);
}
var dimensions = ImageBlobUtility.GetDimensions(imageData.BinaryData);
if (IsNotRequiredHeight(dimensions) && IsNotRequiredWidth(dimensions))
{
ErrorMessage = "The image used in reference '{0}' must have a size of ({1},{2}) pixels";
return(false);
}
if (IsNotRequiredHeight(dimensions))
{
ErrorMessage = "The image used in property '{0}' must have a height of {2} pixels";
return(false);
}
if (IsNotRequiredWidth(dimensions))
{
ErrorMessage = "The image used in property '{0}' must have a width of {1} pixels";
return(false);
}
return(true);
}
public void contentEvents_PublishingContent(object sender, ContentEventArgs e)
{
var content = e.Content;
if (!(content is ImageData))
{
return;
}
var image = content as ImageData;
Dimensions imageDimensions = ImageBlobUtility.GetDimensions(image.BinaryData);
PropertyInfo[] properties = image.GetType().GetProperties();
int requiredWidth = imageDimensions.Width;
foreach (var propertyInfo in properties)
{
if (propertyInfo.PropertyType != typeof(Blob))
{
continue;
}
//get attribute name
var imageWidthAttribute = (ImageWidthDescriptorAttribute)Attribute.GetCustomAttribute(propertyInfo, typeof(ImageWidthDescriptorAttribute));
var imageScaleAttribute = (ImageScaleDescriptorAttribute)Attribute.GetCustomAttribute(propertyInfo, typeof(ImageScaleDescriptorAttribute));
if (imageWidthAttribute != null)
{
requiredWidth = imageWidthAttribute.Width;
}
else if (imageScaleAttribute != null)
{
requiredWidth = (int)(imageDimensions.Width * imageScaleAttribute.DimensionMultiplier);
}
else
{
continue;
}
var calculatedDimensions = ImageResizeUtility.ResizeWidthMaintainAspectRatio(imageDimensions, requiredWidth);
var imageDescriptor = new ImageDescriptorAttribute(calculatedDimensions.Height, calculatedDimensions.Width);
var thumbnailManager = ServiceLocator.Current.GetInstance <ThumbnailManager>();
var resizedBlob = thumbnailManager.CreateImageBlob(image.BinaryData, propertyInfo.Name, imageDescriptor);
//assign blob to current property
propertyInfo.SetValue(image, resizedBlob, null);
}
}
public override bool IsValid(object value)
{
if (MinimumHeight < 1 && MaximumHeight < 1 &&
MinimumWidth < 1 && MaximumWidth < 1)
{
ErrorMessage = "The allowed image height or width limits must be specified within the validation attribute";
return(false);
}
var contentReference = value as ContentReference;
if (contentReference == null)
{
ErrorMessage = "RequiredImageSize attribute should only be applied to ContentReference properties";
return(false);
}
var content = ServiceLocator.Current.GetInstance <IContentLoader>().Get <ContentData>(contentReference);
if (content == null)
{
ErrorMessage = "The content selected for property '{0}' cannot be found!";
return(false);
}
var imageData = content as IContentImage;
if (imageData == null)
{
ErrorMessage = "RequiredImageSize attribute applied to property '{0}' can only be applied to ContentReferences that inherit from IContentImage";
return(false);
}
var dimensions = ImageBlobUtility.GetDimensions(imageData.BinaryData);
if (!IsHeightWithinRange(dimensions) || !IsWidthWithinRange(dimensions))
{
ErrorMessage = "The image used in reference '{0}' must have the following dimensions:" + GetRequiredSizes();
return(false);
}
return(true);
}