//构造函数
public AttentionService()
{
Boolean same = false;
using (var dbcontext = new AttentionContext())
{
this.Attentions = dbcontext.Attentions.ToList();
}
this.MatchType = "Approximate";
this.Listeners = new List <ListenerInfo>();
foreach (Attention att in Attentions)
{
same = false;
foreach (ListenerInfo listenerInfo in Listeners)
{
if (listenerInfo.Listener.Equals(att.Listener))
{
same = true;
listenerInfo.Count++;
break;
}
}
if (!same)
{
this.Listeners.Add(new ListenerInfo(att.Listener, 1));
}
}
}
public List <Attention> QueryAll()
{
using (var dbcontext = new AttentionContext())
{
return(dbcontext.Attentions.ToList());
}
}
/// <summary>
/// 初始化关注点数据库信息
/// </summary>
public static void Init()
{
AttentionContext.CurrentDirectory = System.Environment.CurrentDirectory + @"\data\app\cc.wnapp.whuHelper";
using (var context = new AttentionContext())
{
var objectContext = ((IObjectContextAdapter)context).ObjectContext;
var mappingCollection = (StorageMappingItemCollection)objectContext.MetadataWorkspace.GetItemCollection(DataSpace.CSSpace);
mappingCollection.GenerateViews(new List <EdmSchemaError>());
}
}
//添加关注
public void Add(String SourceQQ, String Attention, String GroupNum)
{
if (Attention.Contains(" ") || Attention.Equals(""))
{
throw new Exception("不允许输入空格和空字符串");
}
using (var dbcontext = new AttentionContext())
{
Attention newatt = new Attention(SourceQQ, GroupNum, Attention);
dbcontext.Attentions.Add(newatt);
dbcontext.SaveChanges();
this.Attentions = QueryAll();
}
UpdateListeners();
}
//删除关注
public Boolean Remove(String SourceQQ, String Attention, String GroupNum)
{
using (var dbcontext = new AttentionContext())
{
Attention temp = dbcontext.Attentions.FirstOrDefault(p => p.Listener == SourceQQ && p.Group == GroupNum && p.AttentionPoint == Attention);
if (temp != null)
{
dbcontext.Attentions.Remove(temp);
dbcontext.SaveChanges();
this.Attentions = QueryAll();
UpdateListeners();
return(true);
}
else
{
return(false);
}
}
}
//更新关注
public Boolean Update(String SourceQQ, String OldAttention, String NewAttention, String GroupNum)
{
//检查是否存在，
//如有删除之，并插入新的
//允许GroupNum为空，这样就只要查询所有的Attention字段相等的部分
using (var dbcontext = new AttentionContext())
{
var quary = dbcontext.Attentions
.Where(att => att.AttentionPoint == OldAttention && att.Group == GroupNum);
foreach (Attention att in quary)
{
dbcontext.Attentions.Remove(att);
dbcontext.Attentions.Add(new Attention(SourceQQ, GroupNum, NewAttention));
}
dbcontext.SaveChanges();
this.Attentions = QueryAll();
}
return(true);
}
