public T GetModel(string sql)
{
DataSet ds = new DataSet();
using (var db = new Model.Entities())
{
return(db.Set <T>().SqlQuery(sql).FirstOrDefault());
}
}
/// <summary>
/// 根据条件 删除实体
/// </summary>
/// <param name="doWhere"></param>
/// <returns></returns>
public int DelByWhere(Expression <Func <T, bool> > doWhere)
{
try
{
// List<T> pDels = _db.Set<T>().Where<T>(doWhere).ToList();
////List<T> pDels = _db.Set<T>().Where<T>(doWhere).AsQueryable();
// pDels.ForEach(
// //p => _db.Set<T>().Remove(p)
// p =>
// {
// _db.Entry<T>(p).State = EntityState.Detached;//oracle数据库没这一句不能修改
// _db.Set<T>().Attach(p);
// _db.Entry<T>(p).State = EntityState.Deleted;
// }
// );
// return _db.SaveChanges();
int iret = -1;
//Logger("根据条件删除" + typeof(T).Name + "中的数据", () =>
//{
using (DbContext _dbx = new Model.Entities())
{
List <T> listDels = _dbx.Set <T>().Where(doWhere).ToList();
listDels.ForEach(d =>
{
_dbx.Set <T>().Attach(d);
_dbx.Set <T>().Remove(d);
});
iret = _dbx.SaveChanges();
//});
}
return(iret);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 批量新增实体
/// </summary>
/// <param name="entitys"></param>
/// <returns></returns>
public int AddListEntity(List <T> entitys)
{
try
{
using (DbContext _dbx = new Model.Entities())
{
foreach (T entity in entitys)
{
_dbx.Set <T>().Add(entity);
}
return(_dbx.SaveChanges());
}
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 根据条件 删除实体
/// </summary>
/// <param name="doWhere"></param>
/// <returns></returns>
public int DelBySqlWhere(Expression <Func <T, bool> > doWhere)
{
try
{
int iret = -1;
using (DbContext _dbx = new Model.Entities())
{
iret = BatchExtensions.Delete(_dbx.Set <T>().Where(doWhere));
}
return(iret);
}
catch (Exception ex)
{
RecordLog.RecordWarn(ex.ToString());
throw ex;
}
}
/// <summary>
/// 批量修改
/// </summary>
/// <param name="entity"></param>
/// <param name="dWhere"></param>
/// <param name="uProName">要修改的列名</param>
/// <returns></returns>
public int UpdateListEntity(T entity, Expression <Func <T, bool> > dWhere, params string[] uProName)
{
try
{
using (DbContext db = new Model.Entities()) //DBContextFactory().GetDbContext()
{
//1.查询要修改的数据
List <T> listModifing = db.Set <T>().Where(dWhere).ToList();
//2.获取实体类对象
Type t = typeof(T);
//3.获取实体类的所有属性
List <PropertyInfo> pInfos = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList();
//4.创建一个实体属性的字典集合
Dictionary <string, PropertyInfo> dictPros = new Dictionary <string, PropertyInfo>();
//5.将实体属性中要修改的属性添加到字典集合中，健：属性名，值：属性对象
pInfos.ForEach(p =>
{
if (uProName.Contains(p.Name))
{
dictPros.Add(p.Name, p);
}
});
//6.循环要修改的属性名
foreach (string proName in uProName)
{
//如果存在则取出要修改的属性
PropertyInfo proInfo = dictPros[proName];
//取出要修改的值
object newValue = proInfo.GetValue(entity, null);
//批量设置要修改对象的属性
foreach (T su in listModifing)
{
//为要修改的对象属性设置新的值
proInfo.SetValue(su, newValue, null);
}
}
return(db.SaveChanges());
}
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 4.x扩展修改方法（把不须要修改的列用LAMBDA数组表示出来）
/// </summary>
/// <param name="model">要修改的实体对象</param>
/// <param name="ignoreProperties">不须要修改的相关字段</param>
/// <returns>受影响的行数</returns>
public int UpdateEntity(T model, params Expression <Func <T, object> >[] ignoreProperties)
{
int iret = -1;
//Logger("修改" + typeof(T).Name + "中的数据", () =>
//{
using (DbContext db = new Model.Entities()) //DBContextFactory().GetDbContext()
{
db.Entry <T>(model).State = EntityState.Detached;
db.Set <T>().Attach(model);
DbEntityEntry entry = db.Entry <T>(model);
entry.State = System.Data.EntityState.Unchanged;
Type t = typeof(T);
List <PropertyInfo> proInfos = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList();
Dictionary <string, PropertyInfo> dicPros = new Dictionary <string, PropertyInfo>();
proInfos.ForEach(
p => dicPros.Add(p.Name, p)
);
if (ignoreProperties != null)
{
foreach (var ignorePropertyExpression in ignoreProperties)
{
//根据表达式得到对应的字段信息
var ignorePropertyName = new PropertyExpressionParser <T>(ignorePropertyExpression).Name;
dicPros.Remove(ignorePropertyName);
}
}
foreach (string proName in dicPros.Keys)
{
entry.Property(proName).IsModified = true;
}
iret = db.SaveChanges();
}
return(iret);
}
/// <summary>
/// 新增实体
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
public int AddEntity(T entity)
{
try
{
using (DbContext _dbx = new Model.Entities())
{
_dbx.Set <T>().Add(entity);
//_dbx.Configuration.ValidateOnSaveEnabled = false;
int count = _dbx.SaveChanges();
//_dbx.Configuration.ValidateOnSaveEnabled = true;
return(count);
}
//DbSet<T> dst = _db.Set<T>();
//dst.Add(entity);
//return _db.SaveChanges();
}
catch (Exception ex)
{
throw ex;
}
}