public DS_ComNews GetSingle(int ID)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
return(ct.DS_ComNews.Single(a => a.ID == ID));
}
}
/// <summary>
/// 排序
/// </summary>
/// <param name="ID"></param>
/// <param name="IsUp"></param>
public void Sort(int ID, bool IsUp)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
var md = ct.DS_ComNews.Single(a => a.ID == ID);
ct.ExecuteCommand("update DS_ComNews set px=(select RowNumber from (select (ROW_NUMBER() OVER (ORDER BY px)) AS RowNumber,id from DS_ComNews where MemberID={0}) as p2 where id=DS_ComNews.id) where MemberID={0}", md.MemberID);
if (IsUp)
{
DS_ComNews p = ct.DS_ComNews.Single(a => a.ID == ID);
DS_ComNews p1;
if (p.Px > 1)
{
p1 = ct.DS_ComNews.Single(a => a.Px == (p.Px - 1) && a.MemberID == md.MemberID);
p.Px--;
p1.Px++;
}
}
else
{
DS_ComNews p = ct.DS_ComNews.Single(a => a.ID == ID);
DS_ComNews p1;
if (p.Px < ct.DS_ComNews.Where(a => a.MemberID == md.MemberID).Count())
{
p1 = ct.DS_ComNews.Single(a => a.Px == (p.Px + 1) && a.MemberID == md.MemberID);
p.Px++;
p1.Px--;
}
}
ct.SubmitChanges();
}
}
public void Delete(string Ids)
{
using (var con = DbHelperSQL.GetConnection())
{
var tran = con.BeginTransaction();
var ct = new DS_ComNewsDataContext(con);
ct.Transaction = tran;
string[] idarray = Ids.Split(',');
var list = ct.DS_ComNews.Where(a => idarray.Contains(a.ID.ToString()));
foreach (var md in list)
{
if (md.ParentID > 0)
{
var parent = ct.DS_ComNews.Single(a => a.ID == md.ParentID);
parent.Coment--;
}
else
{
var comlist = ct.DS_ComNews.Where(a => a.ParentID == md.ID);
ct.DS_ComNews.DeleteAllOnSubmit(comlist);
}
}
ct.DS_ComNews.DeleteAllOnSubmit(list);
ct.SubmitChanges();
tran.Commit();
}
}
public List <T> Query <T>(string sql, params object[] parameterValues)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
return(ct.ExecuteQuery <T>(sql, parameterValues).ToList());
}
}
public void Update(DS_ComNews ComNews)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
ct.DS_ComNews.Attach(ComNews, true);
ct.SubmitChanges();
}
}
public void Add(DS_ComNews ComNews)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
ct.DS_ComNews.InsertOnSubmit(ComNews);
ct.SubmitChanges();
}
}
public void Comment(DS_ComNews ComNews)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
ct.DS_ComNews.InsertOnSubmit(ComNews);
var md = ct.DS_ComNews.Single(a => a.ID == ComNews.ParentID);
md.Coment++;
ct.SubmitChanges();
}
}
public List <DS_ComNews> Query(string condition, string orderby, params object[] param)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
IQueryable <DS_ComNews> ComNewsList = ct.DS_ComNews;
if (!string.IsNullOrEmpty(condition))
{
ComNewsList = ComNewsList.Where(condition, param);
}
if (!string.IsNullOrEmpty(orderby))
{
ComNewsList = ComNewsList.OrderBy(orderby);
}
return(ComNewsList.ToList());
}
}
public List <DS_ComNews> Query(string condition, string orderby, int startIndex, int pageSize, ref int pageCount, params object[] param)
{
using (var ct = new DS_ComNewsDataContext(DbHelperSQL.Connection))
{
IQueryable <DS_ComNews> ComNewsList = ct.DS_ComNews;
if (!string.IsNullOrEmpty(condition))
{
ComNewsList = ComNewsList.Where(condition, param);
}
if (!string.IsNullOrEmpty(orderby))
{
ComNewsList = ComNewsList.OrderBy(orderby);
}
pageCount = ComNewsList.Count();
return(ComNewsList.Skip(startIndex).Take(pageSize).ToList());
}
}
public void Delete(int ID)
{
using (var con = DbHelperSQL.GetConnection()) {
var tran = con.BeginTransaction();
var ct = new DS_ComNewsDataContext(con);
ct.Transaction = tran;
var md = ct.DS_ComNews.Single(a => a.ID == ID);
if (md.ParentID > 0)
{
var parent = ct.DS_ComNews.Single(a => a.ID == md.ParentID);
parent.Coment--;
}
else
{
var comlist = ct.DS_ComNews.Where(a => a.ParentID == md.ID);
ct.DS_ComNews.DeleteAllOnSubmit(comlist);
}
ct.DS_ComNews.DeleteOnSubmit(md);
ct.SubmitChanges();
tran.Commit();
}
}
