public virtual bool UpdateBatch(List <T> entitys)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
try
{
foreach (var entity in entitys)
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Modified;
var result1 = Entities.SaveChanges();
if (result1 <= 0)
{
Entities.ChangeTracker.DetectChanges();
return(false);
}
}
return(true);
}
catch (DbEntityValidationException)
{
//throw ee;
return(false);
}
catch (Exception)
{
//LogHelper.WriteLog("", e);
//throw e;
return(false);
}
}
}
/// <summary>
/// 插入Entity
/// </summary>
/// <param cookieName="model"></param>
/// <returns></returns>
public virtual T InsertReturn(T entity)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
try
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Added;
if (Entities.SaveChanges() > 0)
{
return(entity);
}
else
{
return(null);
}
}
catch (DbEntityValidationException dbEx)
{
//LogHelper.WriteLog("", dbEx);
System.Diagnostics.Debug.WriteLine(dbEx.Message);
throw dbEx;
}
catch (Exception ee)
{
//LogHelper.WriteLog("", ee);
System.Diagnostics.Debug.WriteLine(ee.Message);
throw ee;
}
}
}
/// <summary>
/// 根据条件查找
/// </summary>
/// <param cookieName="exp">lambda查询条件where</param>
/// <returns></returns>
public virtual T GetEntity(Func <T, bool> exp)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
var entity = Entities.Set <T>().Where(exp).SingleOrDefault();
if (entity != null)
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Detached;
}
return(entity);
}
}
/// <summary>
/// 删除Entity
/// </summary>
/// <param cookieName="entity"></param>
/// <returns></returns>
public virtual bool Delete(T entity)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
if (entity != null)
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Deleted;
return(Entities.SaveChanges() > 0);
}
return(false);
}
}
/// <summary>
/// 根据条件查找
/// </summary>
/// <param cookieName="CommandText">Sql语句</param>
/// <param cookieName="objParams">可变参数</param>
/// <returns></returns>
public virtual T GetEntity(string CommandText)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
var entity = Entities.Database.SqlQuery <T>("select * from " + typeof(T).Name + " where " + CommandText)
.SingleOrDefault();
if (entity != null)
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Detached;
}
return(entity);
}
}
/// <summary>
/// 更新Entity(注意这里使用的傻瓜式更新,可能性能略低)
/// </summary>
/// <param cookieName="model"></param>
/// <returns></returns>
public virtual bool Update(T entity)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
try
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Modified;
var result = Entities.SaveChanges();
return(result > 0);
}
catch (DbEntityValidationException ee)
{
throw ee;
}
catch (Exception e)
{
throw e;
}
}
}
/// <summary>
/// 批量插入
/// </summary>
/// <param name="entities"></param>
/// <returns></returns>
public bool InsertBatch(IEnumerable <T> entities)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
try
{
foreach (var entity in entities)
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Added;
}
return(Entities.SaveChanges() > 0);
}
catch (DbEntityValidationException ee)
{
//LogHelper.WriteLog("", ee);
throw new Exception(ee.EntityValidationErrors.ElementAt(0).ValidationErrors.ElementAt(0)
.ErrorMessage.ToString());
}
}
}
/// <summary>
/// 插入Entity
/// </summary>
/// <param cookieName="model"></param>
/// <returns></returns>
public virtual bool Insert(T entity)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
try
{
//var obj = Entities.Set<T>();
//obj.Attach(entity);
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Added;
return(Entities.SaveChanges() > 0);
}
catch (DbEntityValidationException ee)
{
//LogHelper.WriteLog("", ee);
System.Diagnostics.Debug.WriteLine(ee.EntityValidationErrors.ElementAt(0).ValidationErrors
.ElementAt(0).ErrorMessage);
throw new Exception(ee.EntityValidationErrors.ElementAt(0).ValidationErrors.ElementAt(0)
.ErrorMessage.ToString());
}
}
}
/// <summary>
/// 更新Entity(注意这里使用的傻瓜式更新,可能性能略低)
/// </summary>
/// <param cookieName="model"></param>
/// <returns></returns>
public virtual T UpdateReturn(T entity)
{
using (KS_StuInfoEntities Entities = new KS_StuInfoEntities())
{
Entities.Entry <T>(entity).State = System.Data.Entity.EntityState.Modified;
try
{
if (Entities.SaveChanges() > 0)
{
return(entity);
}
else
{
return(null);
}
}
catch (Exception e)
{
//LogHelper.WriteLog("", e);
throw e;
}
}
}
