void IEditableObject.CancelEdit()
{
CopyFrom(_bak, false);
_bak = null;
}
void IEditableObject.BeginEdit()
{
_bak = Clone() as EntityBase;
}
private void SetValue(IEntity entity, String name, Type type, Object value)
{
// 注意：name并不一定是实体类的成员，随便读取原数据可能会造成不必要的麻烦
Object oldValue = null;
if (type != null)
{
// 仅对精确匹配的字段进行读取旧值
oldValue = entity[name];
}
//else
//{
// type = value?.GetType();
// // 如果扩展数据里面有该字段也读取旧值
// if (entity.Extends.TryGetValue(name, out var v)) oldValue = v;
//}
// 不处理相同数据的赋值
if (Equals(value, oldValue))
{
return;
}
if (type == typeof(String))
{
// 不处理空字符串对空字符串的赋值
if (value != null && String.IsNullOrEmpty(value.ToString()))
{
if (oldValue == null || String.IsNullOrEmpty(oldValue.ToString()))
{
return;
}
}
}
else if (type == typeof(Boolean))
{
// 处理字符串转为布尔型
if (value != null && value.GetType() == typeof(String))
{
var vs = value.ToString();
if (String.IsNullOrEmpty(vs))
{
value = false;
}
else
{
if (Array.IndexOf(TrueString, vs.ToLower()) >= 0)
{
value = true;
}
else if (Array.IndexOf(FalseString, vs.ToLower()) >= 0)
{
value = false;
}
else if (DAL.Debug)
{
DAL.WriteLog("无法把字符串{0}转为布尔型！", vs);
}
}
}
}
else if (type == typeof(Guid))
{
if (!(value is Guid))
{
if (value is Byte[])
{
value = new Guid((Byte[])value);
}
else if (value is String)
{
value = new Guid((String)value);
}
}
}
//// 不影响脏数据的状态
//var ds = entity.Dirtys;
//Boolean? b = null;
//if (ds.ContainsKey(name)) b = ds[name];
//entity[name] = value == DBNull.Value ? null : value;
// 如果值类型不一致，则备份原始值到扩展，解决数据库类型比实体类型大（如Int64到Int32）
if (value == DBNull.Value)
{
entity[name] = null;
}
else
{
entity[name] = value;
if (value?.GetType() != type && !EntityBase.CheckEqual(entity[name], value))
{
var ext = entity as IExtend3;
ext[name] = value;
}
}
//if (b != null)
// ds[name] = b.Value;
//else
// ds.Remove(name);
}
void IEditableObject.EndEdit()
{
//Update();
Save();
_bak = null;
}
void IEditableObject.CancelEdit()
{
CopyFrom(_bak, false);
_bak = null;
}
void IEditableObject.BeginEdit()
{
_bak = Clone() as EntityBase;
}
