public virtual object LoadAliasJoinTableData(DataContext context, IDataReader datareader, QueryState queryState, string aliasName)
{
object item = Activator.CreateInstance(ObjectType);
bool nodataSetNull = queryState != null?queryState.CheckNoDataSetNull(aliasName) : false;
bool hasData = false;
foreach (DataFieldMapping field in this._fieldList)
{
if (field == null)
{
continue;
}
string name = string.Format("{0}_{1}", aliasName, field.Name);
if (queryState == null)
{
object obj = datareader[name];
object value = field.ToProperty(obj);
if (!Object.Equals(value, null))
{
field.Handler.Set(item, value);
}
}
else if (queryState.CheckSelectField(name))
{
object obj = datareader[name];
object value = field.ToProperty(obj);
if (!Object.Equals(value, null))
{
hasData = true;
field.Handler.Set(item, value);
}
}
}
if (_collectionRelationFields.Count > 0)
{
foreach (CollectionRelationFieldMapping mapping in _collectionRelationFields)
{
mapping.Handler.Set(item, mapping.ToProperty(context, item, false));
}
}
if (!hasData && nodataSetNull)
{
return(null);
}
if (_isDataEntity)
{
DataEntity entity = item as DataEntity;
entity.SetContext(context);
}
return(item);
}
/// <summary>
/// 创建新对象
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
/// <returns>数据对象</returns>
public T CreateNew <T>()
where T : class, new()
{
DataTableEntityMapping rawmapping = DataMapping.GetTableMapping(typeof(T));
T obj = rawmapping.InitialData() as T;
if (rawmapping.IsDataEntity)
{
DataEntity data = obj as DataEntity;
data.SetContext(this);
}
return(obj);
}
public override object LoadData(DataContext context, IDataReader datareader, object state)
{
QueryState queryState = state as QueryState;
if (this._singleRelationFields.Count > 0)
{
queryState.InitialJoinData();
return(LoadJoinTableData(context, datareader, queryState, string.Empty));
}
object item = Activator.CreateInstance(ObjectType);
foreach (DataFieldMapping field in this._fieldList)
{
if (queryState == null)
{
object obj = datareader[field.Name];
object value = field.ToProperty(obj);
if (!Object.Equals(value, null))
{
field.Handler.Set(item, value);
}
}
else if (queryState.CheckSelectField(field.Name))
{
object obj = datareader[field.Name];
object value = field.ToProperty(obj);
if (!Object.Equals(value, null))
{
field.Handler.Set(item, value);
}
}
}
if (_collectionRelationFields.Count > 0)
{
foreach (CollectionRelationFieldMapping mapping in _collectionRelationFields)
{
mapping.Handler.Set(item, mapping.ToProperty(context, item, true));
}
}
if (_isDataEntity)
{
DataEntity entity = item as DataEntity;
entity.SetContext(context);
}
return(item);
}
//public virtual void LoadJoinTableData(DataContext context, IDataReader datareader, object item, QueryState queryState, string fieldPath)
//{
// string aliasName = queryState.GetAliasName(fieldPath);
// foreach (DataFieldMapping field in this._fieldList) {
// string name = string.Format("{0}_{1}", aliasName, field.Name);
// if (queryState.CheckSelectField(name)) {
// object obj = datareader[name];
// object value = field.ToProperty(obj);
// if (!Object.Equals(value, null)) {
// field.Handler.Set(item, value);
// }
// }
// }
// if (_collectionRelationFields.Count > 0) {
// foreach (CollectionRelationFieldMapping mapping in _collectionRelationFields) {
// mapping.Handler.Set(item, mapping.ToProperty(context, item, true));
// }
// }
// foreach (SingleRelationFieldMapping mapping in _singleRelationFields) {
// string fpath = string.Format("{0}.{1}", fieldPath, mapping.FieldName);
// object value = mapping.ToProperty(context, datareader, queryState, fpath);
// if (!Object.Equals(value, null)) {
// mapping.Handler.Set(item, value);
// }
// }
// if (item is DataEntity entity) {
// entity.SetContext(context);
// entity.LoadDataComplete();
// }
//}
public virtual object LoadJoinTableData(DataContext context, IDataReader datareader, QueryState queryState, string fieldPath)
{
object item = Activator.CreateInstance(this.ObjectType);
queryState.SetJoinData(fieldPath, item);
string aliasName = queryState.GetAliasName(fieldPath);
foreach (DataFieldMapping field in this._fieldList)
{
string name = string.Format("{0}_{1}", aliasName, field.Name);
if (queryState.CheckSelectField(name))
{
object obj = datareader[name];
object value = field.ToProperty(obj);
if (!Object.Equals(value, null))
{
field.Handler.Set(item, value);
}
}
}
if (_collectionRelationFields.Count > 0)
{
foreach (CollectionRelationFieldMapping mapping in _collectionRelationFields)
{
mapping.Handler.Set(item, mapping.ToProperty(context, item, true));
}
}
foreach (SingleRelationFieldMapping mapping in _singleRelationFields)
{
string fpath = string.Format("{0}.{1}", fieldPath, mapping.FieldName);
object value = mapping.ToProperty(context, datareader, queryState, fpath);
if (!Object.Equals(value, null))
{
mapping.Handler.Set(item, value);
}
}
if (_isDataEntity)
{
DataEntity entity = item as DataEntity;
entity.SetContext(context);
}
return(item);
}
