/// <summary>
/// 删除所有的符合特定表达式的数据
/// </summary>
/// <param name="Predicate">查询条件谓语表达式</param>
/// <param name="isSave">是否执行保存</param>
/// <returns>操作影响行数</returns>
public bool DeleteEntity(Expression <Func <TEntity, bool> > Predicate, bool isSave = true)
{
//删除实体 //查询出来一个删除
HSJXEntities DBContext = GetDataContext();
{
List <TEntity> Entities = DBContext.Set <TEntity>().Where <TEntity>(Predicate).AsQueryable().ToList <TEntity>();
foreach (var item in Entities)
{
DBContext.Set <TEntity>().Attach(item);
DBContext.Entry <TEntity>(item).State = EntityState.Deleted;
}
}
return(SaveCommit(isSave));
}
/// <summary>
/// 插入实体记录集合
/// </summary>
/// <param name="entities">实体记录集合</param>
/// <param name="isSave">是否知悉保存</param>
/// <returns>操作影响行数</returns>
public bool AddEntityByBluk(IEnumerable <TEntity> entities, bool isSave = true)
{
HSJXEntities DBContext = GetDataContext();
entities = entities.ToArray();
var conn = new SqlConnection(DBContext.Database.Connection.ConnectionString);
conn.Open();
Type t = typeof(TEntity);
var bulkCopy = new SqlBulkCopy(conn)
{
DestinationTableName = t.Name
};
var properties = t.GetProperties().ToArray();
var table = new DataTable();
foreach (var property in properties)
{
Type propertyType = property.PropertyType;
if (propertyType.IsGenericType &&
propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
propertyType = Nullable.GetUnderlyingType(propertyType);
}
table.Columns.Add(new DataColumn(property.Name, propertyType));
}
foreach (var entity in entities)
{
table.Rows.Add(properties.Select(
property => GetPropertyValue(
property.GetValue(entity, null))).ToArray());
}
//其实可以修改按照列名匹配写入DB
bulkCopy.WriteToServer(table);
conn.Close();
return(true);
}
public EFRepositoryBase()
{
//构造函数直接初始化
EFContext = ServiceLocator.Current.GetInstance <HSJXEntities>();
}
/// <summary> /// 数据处理,异常必须在内部进行处理 /// </summary> /// <param name="context"></param> /// <returns></returns> public abstract DataMigrationResult DataHandle(HSJXEntities context);
