protected void GridViewChannels_SelectedIndexChanged(object sender, EventArgs e)
{
var context = new TwitterLikeWebChatEntities();
var channelId = Convert.ToInt32(this.GridViewChannels.SelectedDataKey.Value);
var messages = context.Messages.Where(m => m.ChannelId == channelId);
this.RepeaterMessages.DataSource = messages.ToList();
this.RepeaterMessages.DataBind();
this.ButtonClearChannel.Visible = true;
this.ButtonRefreshChannel.Visible = true;
if (this.User.Identity.IsAuthenticated)
{
this.PanelChat.Visible = true;
this.TextBoxUserMessage.Text = string.Empty;
}
}
protected void ButtonSubmitMessage_Click(object sender, EventArgs e)
{
int currentChannelId = Convert.ToInt32(this.GridViewChannels.SelectedDataKey.Value);
if (currentChannelId == 0)
{
ErrorSuccessNotifier.AddErrorMessage("No chat channel is selected!");
}
else
{
var context = new TwitterLikeWebChatEntities();
var channel = context.Channels.FirstOrDefault(ch => ch.ChannelId == currentChannelId);
if (channel == null)
{
ErrorSuccessNotifier.AddErrorMessage(
"An unexpected error occurred! The channel you want to chat in was not found!");
}
else
{
try
{
var newMessage = new Message();
newMessage.Author = context.AspNetUsers.FirstOrDefault(u => u.UserName == this.User.Identity.Name);
var newMessageText = this.TextBoxUserMessage.Text.Trim();
if (newMessageText.Length < 1)
{
ErrorSuccessNotifier.AddInfoMessage("Message content must be at least one symbol!");
}
else
{
newMessage.Content = newMessageText;
newMessage.Date = DateTime.Now;
channel.Messages.Add(newMessage);
context.SaveChanges();
this.TextBoxUserMessage.Text = string.Empty;
}
this.GridViewChannels_SelectedIndexChanged(null, null);
}
catch (Exception exc)
{
ErrorSuccessNotifier.AddErrorMessage(exc);
}
}
}
}
protected void ButtonClearChannel_Click(object sender, EventArgs e)
{
int currentChannelId = Convert.ToInt32(this.GridViewChannels.SelectedDataKey.Value);
if (currentChannelId == 0)
{
ErrorSuccessNotifier.AddSuccessMessage("No chat channel is selected!");
}
else
{
var context = new TwitterLikeWebChatEntities();
try
{
var messages = context.Messages.Where(m => m.ChannelId == currentChannelId);
context.Messages.RemoveRange(messages);
context.SaveChanges();
this.ButtonClearChannel.Visible = false;
this.ButtonRefreshChannel.Visible = false;
this.PanelChat.Visible = false;
ErrorSuccessNotifier.AddSuccessMessage("Channel successfully cleared!");
}
catch (Exception exc)
{
ErrorSuccessNotifier.AddErrorMessage(exc);
}
}
}
public IQueryable<Channel> GridViewChannels_GetData()
{
var context = new TwitterLikeWebChatEntities();
return context.Channels.OrderBy(ch => ch.ChannelId);
}
