public List <T> GetListForPaging(Expression <Func <T, bool> > exp, int page, int pagesize, out int totalcount, out string msg, Func <IQueryable <T>, IOrderedQueryable <T> > orderBy)
{
if (page <= 0 || pagesize <= 0)
{
page = 1; pagesize = 10;
}
msg = string.Empty;
totalcount = 0;
try
{
using (L_Sys context = new L_Sys())
{
var iquerableresult = context.Set <T>().Where(exp);
totalcount = iquerableresult.Count();
var result = orderBy(iquerableresult).Skip((page - 1) * pagesize).Take(pagesize);
var result_list = result.ToList();
return(result_list);
}
}
catch (DbEntityValidationException ex)
{
foreach (var item1 in ex.EntityValidationErrors)
{
foreach (var item2 in item1.ValidationErrors)
{
msg += item2.ErrorMessage + "<br />";
}
}
return(null);
}
}
public IPagedList <T> GetPagedList(Expression <Func <T, bool> > exp, int page, int pagesize, out string msg, Func <IQueryable <T>, IOrderedQueryable <T> > orderBy)
{
if (page <= 0 || pagesize <= 0)
{
page = 1; pagesize = 10;
}
msg = string.Empty;
try
{
using (L_Sys context = new L_Sys())
{
var iquerableresult = context.Set <T>().Where(exp);
var result = orderBy(iquerableresult).ToPagedList <T>(page, pagesize);
return(result);
}
}
catch (Exception ex)
{
msg += ex.Message + "<br />" + ex.StackTrace + "<br />";
return(null);
}
}
public bool RemoveRange(List <T> list, out string msg)
{
msg = string.Empty;
try
{
using (L_Sys context = new L_Sys())
{
context.Set <T>().RemoveRange(list);
return(context.SaveChanges() > 0);
}
}
catch (DbEntityValidationException ex)
{
foreach (var item1 in ex.EntityValidationErrors)
{
foreach (var item2 in item1.ValidationErrors)
{
msg += item2.ErrorMessage + "<br />";
}
}
return(false);
}
}
public T Find(Expression <Func <T, bool> > exp, out string msg)
{
msg = string.Empty;
try
{
using (L_Sys context = new L_Sys())
{
var result = context.Set <T>().FirstOrDefault(exp);
return(result);
}
}
catch (DbEntityValidationException ex)
{
foreach (var item1 in ex.EntityValidationErrors)
{
foreach (var item2 in item1.ValidationErrors)
{
msg += item2.ErrorMessage + "<br />";
}
}
return(null);
}
}
public List <T> GetList(Expression <Func <T, bool> > exp, out string msg)
{
msg = string.Empty;
try
{
using (L_Sys context = new L_Sys())
{
var result = context.Set <T>().Where(exp);
var result_list = result.ToList();
return(result_list);
}
}
catch (DbEntityValidationException ex)
{
foreach (var item1 in ex.EntityValidationErrors)
{
foreach (var item2 in item1.ValidationErrors)
{
msg += item2.ErrorMessage + "<br />";
}
}
return(null);
}
}
public bool Exist(Expression <Func <T, bool> > exp, out string msg)
{
msg = string.Empty;
try
{
using (L_Sys context = new L_Sys())
{
var result = context.Set <T>().Any(exp);
string result_str = result.ToString();
return(result);
}
}
catch (DbEntityValidationException ex)
{
foreach (var item1 in ex.EntityValidationErrors)
{
foreach (var item2 in item1.ValidationErrors)
{
msg += item2.ErrorMessage + "<br />";
}
}
return(false);
}
}
public bool Update(T entity, out string msg)
{
msg = string.Empty;
try
{
using (L_Sys context = new L_Sys())
{
context.Set <T>().Attach(entity);
context.Entry <T>(entity).State = EntityState.Modified;
return(context.SaveChanges() > 0);
}
}
catch (DbEntityValidationException ex)
{
foreach (var item1 in ex.EntityValidationErrors)
{
foreach (var item2 in item1.ValidationErrors)
{
msg += item2.ErrorMessage + "<br />";
}
}
return(false);
}
}