protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
using (var ctx = new EF.RepositoryContext("LogoDB"))
{
var channel = GetChannel(ctx);
if (channel != null)
{
lblChannelName.Text = channel.Name;
tbxChannelDescription.Text = channel.Description;
tbxChannelWebsite.Text = channel.Website;
var logo = channel.Logos.First(l => l.Suggestion == null);
imgChannelLogo.ImageUrl = Thumbnailer.GetThumbFileUrl(logo.Id);
imgChannelLogo.NavigateUrl = "/Logos/" + logo.Id + ".png";
if (channel.Aliases != null)
{
btnRemoveAlias.Visible = true;
listNewAliases.Items.AddRange(channel.Aliases.Select(a => new ListItem(a.Name, a.Id.ToString())).ToArray());
}
}
}
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
try
{
using (var ctx = new EF.RepositoryContext("LogoDB"))
{
var channel = GetChannel(ctx);
if (channel != null)
{
channel.Website = tbxChannelWebsite.Text.Trim();
channel.Description = tbxChannelDescription.Text.Trim();
if (listNewAliases.Items.Count == 0)
{
throw new Exception("A Channel must have at least one Alias!");
}
// delete aliases that are no longer there
if (channel.Aliases != null)
{
foreach (var alias in channel.Aliases.ToList())
{
if (listNewAliases.Items.FindByText(alias.Name) == null)
{
ctx.Aliases.Remove(alias);
}
}
}
// add new aliases
foreach (ListItem item in listNewAliases.Items)
{
string newAliasTrimmed = item.Text.Trim();
if (!string.IsNullOrEmpty(newAliasTrimmed))
{
if (!channel.Aliases.Any(a => a.Name == newAliasTrimmed))
{
var alias = ctx.Aliases.Create();
alias.Id = Guid.NewGuid();
alias.Name = newAliasTrimmed;
alias.Created = DateTime.Now;
alias.Channel = channel;
channel.Aliases.Add(alias);
}
}
}
// new logo
if (uploadLogoFile.HasFile)
{
var repo = ctx.Repositorys.FirstOrDefault();
var membership = System.Web.Security.Membership.GetUser();
var user = membership != null?ctx.Users.FirstOrDefault(u => u.Id == (Guid)membership.ProviderUserKey) : null;
// check that file is PNG
byte[] logoData = uploadLogoFile.FileBytes;
using (MemoryStream ms = new MemoryStream(logoData))
{
using (System.Drawing.Image image = System.Drawing.Image.FromStream(ms, true, true))
{
if (image.RawFormat.Guid != System.Drawing.Imaging.ImageFormat.Png.Guid)
{
throw new Exception("The supplied Logo file is not a valid PNG image!");
}
if (string.IsNullOrEmpty(tbxLogoName.Text.Trim()))
{
throw new Exception("Please give the new Logo an unique name!");
}
// delete old logo
var oldLogo = channel.Logos.First(l => l.Suggestion == null);
ctx.Logos.Remove(oldLogo);
File.Delete(Thumbnailer.GetThumbFilePath(oldLogo.Id));
File.Delete(Path.Combine(Server.MapPath("~/Logos"), oldLogo.Id + ".png"));
// create new logo
var logo = ctx.Logos.Create();
logo.Id = Guid.NewGuid();
logo.Name = tbxLogoName.Text.Trim();
logo.Origin = tbxLogoOrigin.Text.Trim();
logo.LastModified = DateTime.Now;
logo.Width = image.Width;
logo.Height = image.Height;
logo.SizeInBytes = logoData.Length;
repo.Logos.Add(logo);
logo.Creator = user;
logo.Channels.Add(channel);
File.WriteAllBytes(Path.Combine(Server.MapPath("~/Logos"), logo.Id + ".png"), logoData);
Thumbnailer.CreateLogoThumb(image, logo.Id);
imgChannelLogo.ImageUrl = Thumbnailer.GetThumbFileUrl(logo.Id);
imgChannelLogo.NavigateUrl = "/Logos/" + logo.Id + ".png";
}
}
}
ctx.ChangeTracker.DetectChanges();
ctx.SaveChanges();
}
}
lblReturnMessage.Visible = true;
lblReturnMessage.ForeColor = System.Drawing.Color.Green;
lblReturnMessage.Text = "Channel successfully saved!";
}
catch (Exception ex)
{
lblReturnMessage.Visible = true;
lblReturnMessage.ForeColor = System.Drawing.Color.Red;
lblReturnMessage.Text = ex.Message;
}
}
