public static void FetchREFEntity(object objEntity, REFAttribute refAtt, DataTable table)
{
int rindex = -1;//根据objEntity的Id属性,在table中找到对应的行数
for (int i = 0; i < table.Rows.Count; i++)
{
if (((BaseEntity)objEntity).Id == Convert.ToInt64(table.Rows[i]["E_" + objEntity.GetType().Name + "Id"]))
{
rindex = i;
break;
}
}
//对象的该引用属性为空值
if (table.Rows[rindex]["E_" + refAtt.REFEntityName + "Id"] == DBNull.Value)
{
return;
}
object objRef = DLLAnalysis.GetEntityInstance(refAtt.REFEntityName);
((BaseEntity)objRef).Id = Convert.ToInt64(table.Rows[rindex]["E_" + refAtt.REFEntityName + "Id"]);
EntityInfo refeinfo = DLLAnalysis.GetEntityInfoByType(objRef.GetType());
foreach (FieldAttribute fieldAtt in refeinfo.Properties)
{
FetchPropertyValue(objRef, fieldAtt, table, rindex);
}
objEntity.GetType().GetProperty(refAtt.PropertyName).SetValue(objEntity, objRef, null);
}
/// <summary>
/// 根据实体的Type获得实体的类媒数据信息
/// </summary>
/// <param name="type">实体类的Type</param>
/// <returns>实体的媒数据信息</returns>
public static EntityInfo GetEntityInfoByType(Type type)
{
if (!type.IsSubclassOf(typeof(BaseEntity)))
{
return(null);
}
EntityInfo ei = new EntityInfo();
ei.EntityName = type.Name;//获得实体的名称
object[] atts = type.GetCustomAttributes(typeof(EntityAttribute), false);
if (atts != null && atts.Length > 0)
{
ei.EntityDisplayName = ((EntityAttribute)atts[0]).EntityDisplayName;//获得实体的显示名称
}
PropertyInfo[] properties = type.GetProperties();
List <FieldAttribute> pros = new List <FieldAttribute>();
List <REFAttribute> refs = new List <REFAttribute>();
List <SETAttribute> sets = new List <SETAttribute>();
foreach (PropertyInfo pi in properties)
{
object[] patts = pi.GetCustomAttributes(false);
if (patts != null && patts.Length > 0)
{
object objAtt = patts[0];
if (objAtt is FieldAttribute)
{
((FieldAttribute)objAtt).FieldName = pi.Name;
pros.Add((FieldAttribute)objAtt);
}
else if (objAtt is REFAttribute)
{
REFAttribute refAtt = (REFAttribute)objAtt;
refAtt.EntityName = ei.EntityName;
refAtt.PropertyName = pi.Name;
refAtt.REFFieldName = refAtt.REFEntityName + "Id";
refs.Add(refAtt);
}
else if (objAtt is SETAttribute)
{
SETAttribute setAtt = (SETAttribute)objAtt;
setAtt.EntityName = ei.EntityName;
setAtt.PropertyName = pi.Name;
if (setAtt.IsMidTable)
{
setAtt.MidTableName = type.Name + "_" + setAtt.ElementEntityName;
setAtt.OwnerFieldName = type.Name + "Id";
setAtt.ElementEntityId = setAtt.ElementEntityName + "Id";
}
else
{
setAtt.ElementEntityId = ei.EntityName + "Id";
}
sets.Add(setAtt);
}
//如果有引用自生的属性，则将REFSelf置为true;
else if (objAtt is REFSelfAttribute)
{
ei.REFSelf = true;
}
}
}
ei.Properties = pros;
ei.References = refs;
ei.Sets = sets;
return(ei);
}