public System.IO.Stream ExportHistory(string SenderID)
{
StringBuilder result = new StringBuilder();
try
{
IChatMessageRepository repo = new ChatMessageRepository();
var messages = repo.GetConversationHistory(SPContext.Current.Web.CurrentUser.ID, Int32.Parse(SenderID));
result.Append("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
result.Append("<ChatMessages>");
foreach (ChatMessage msg in messages)
{
result.Append(msg.GetXml());
}
result.Append("</ChatMessages>");
}
catch (Exception ex)
{
Config.WriteException(ex);
WebOperationContext.Current.OutgoingResponse.StatusCode = System.Net.HttpStatusCode.InternalServerError;
WebOperationContext.Current.OutgoingResponse.StatusDescription = Language.CreateChatMessageError;
}
WebOperationContext.Current.OutgoingResponse.ContentType = "text/xml";
return(new MemoryStream(Encoding.UTF8.GetBytes(result.ToString())));;
}