/// <summary>
/// This will populate the server controls and show the image preview popup.
/// </summary>
protected void btnDocumentPreviewLaunch_Click(object sender, EventArgs e)
{
if (!PageBase.StopProcessing)
{
//This hidden field contains the value populated from the client side.
int documentMediaId = 0;
int.TryParse(hdnDocumentMediaId.Value, out documentMediaId);
if (documentMediaId > 0)
{
DocumentMedia media = GetBL <UtilityBL>().GetDocumentMedia(documentMediaId);
if (media != null && Support.CanAccessMedia(media, DataContext))
{
DocumentMediaId = documentMediaId;
var itemBriefItemDocumentMedia = DataContext.ItemBriefItemDocumentMedias.Where(ibi => ibi.ItemBriefDocumentMediaId == DocumentMediaId).FirstOrDefault();
imgPreview.Src = ResolveUrl(Support.GetImageFilePreviewUrl(documentMediaId, PREVIEW_SIZE));
lnkDownload.HRef = ResolveUrl(Support.GetImageFileDownloadUrl(documentMediaId));
txtName.Text = media.Name;
string fileType = "image";
if (ImageHelper.IsImageFileType(media.FileExtension))
{
lblDocumentExtension.Visible = false;
popupDocumentPreview.Title = "Preview Image";
lnkDownload.Title = "Download full size image";
popupDocumentPreviewRemoveConfirmation.Title = "Remove Image";
documentLabelWatermark.WatermarkText = "Click to set image label";
}
else
{
lblDocumentExtension.Visible = true;
lblDocumentExtension.Text = media.FileExtension;
popupDocumentPreview.Title = "File Properties";
lnkDownload.Title = "Download File";
fileType = "file";
popupDocumentPreviewRemoveConfirmation.Title = "Remove File";
documentLabelWatermark.WatermarkText = "Click to set file label";
}
if (itemBriefItemDocumentMedia != null)
{
ltrlRemoveConfirmText.Text = string.Format("Deleting this {0} will also remove it from the Complete Item tab. <br /> Are you sure you want to remove this {0}?", fileType);
}
else
{
ltrlRemoveConfirmText.Text = string.Format("Are you sure you want to remove this {0}?", fileType);
}
popupDocumentPreview.ShowPopup();
}
}
}
}
/// <summary>
/// Loads the file data specified by the 'documentMediaId' and sends it to the browser.
/// </summary>
private void SendMediaFromDB()
{
try
{
DocumentMedia media = GetBL <UtilityBL>().GetDocumentMedia(DocumentMediaId);
if (Support.CanAccessMedia(media, DataContext))
{
//If a media name has not been specified, use the media ID as the file name.
string fileName = (media.Name == null) ? media.DocumentMediaId.ToString() : media.Name;
fileName = fileName.Replace("\"", string.Empty);
if (media.IsImageFile)
{
byte[] bytes = null;
#region Get image bytes
//If a specific size has not been specified, get the thumbnail or full content.
//Otherwise send the resized image.
if (Size == 0)
{
bytes = IsThumbnail ? media.Thumbnail : media.DocumentMediaContent;
}
else
{
using (MemoryStream ms = new MemoryStream(media.DocumentMediaContent))
{
bytes = ImageHelper.GetResizedImage(ms, Size, ImageHelper.GetImageFormat(media.FileExtension));
}
}
#endregion Get image bytes
if (bytes != null)
{
using (MemoryStream ms = new MemoryStream(bytes))
using (Image image = Image.FromStream(ms))
{
WriteImageResponse(image, fileName, media.FileExtension);
return;
}
}
}
else
{
if (IsDownload)
{
WriteBinaryResponse(media.DocumentMediaContent, fileName, media.FileExtension);
return;
}
else
{
using (Image image = Image.FromFile(GetDocumentIconUrl(media.FileExtension)))
{
WriteImageResponse(image, "icon", "png");
return;
}
}
}
}
}
catch
{
}
//If any error occurs, or permission is denied, send the palceholder image to the browser.
using (Image image = Image.FromFile(Server.MapPath(placeholderThumbUrl)))
{
WriteImageResponse(image, "noimage", "png");
return;
}
}
