public void ToObject <T>(IDataReader reader, T item) where T : DatabaseEntity, new()
{
if (reader == null)
{
return;
}
int len = reader.FieldCount;
string[] propertyNames = new string[len];
DatabaseEntityDef definition = _modelDefFactory.GetDef <T>();
for (int i = 0; i < len; ++i)
{
propertyNames[i] = reader.GetName(i);
}
if (reader.Read())
{
for (int i = 0; i < len; ++i)
{
DatabaseEntityPropertyDef property = definition.GetProperty(propertyNames[i]);
object value = property.TypeConverter == null?
ValueConverter.DbValueToTypeValue(property.PropertyType, reader[i]) :
property.TypeConverter.DbValueToTypeValue(reader[i]);
property.SetValue(item, value);
}
}
}
public IList <T> ToList <T>(IDataReader reader)
where T : DatabaseEntity, new()
{
IList <T> lst = new List <T>();
if (reader == null)
{
return(lst);
}
int len = reader.FieldCount;
string[] propertyNames = new string[len];
DatabaseEntityDef definition = _modelDefFactory.GetDef <T>();
for (int i = 0; i < len; ++i)
{
propertyNames[i] = reader.GetName(i);
}
while (reader.Read())
{
T item = new T();
for (int i = 0; i < len; ++i)
{
DatabaseEntityPropertyDef property = definition.GetProperty(propertyNames[i]);
object fieldValue = reader[i];
if (property.PropertyName == "Id" && fieldValue == DBNull.Value)
{
item = null;
break;
}
object value = property.TypeConverter == null?
ValueConverter.DbValueToTypeValue(property.PropertyType, fieldValue) :
property.TypeConverter.DbValueToTypeValue(fieldValue);
property.SetValue(item, value);
}
if (item != null && !item.Deleted)
{
lst.Add(item);
}
}
return(lst);
}
private DatabaseEntityDef CreateModelDef(Type modelType)
{
DatabaseEntityDef modelDef = new DatabaseEntityDef();
#region 自身
modelDef.EntityType = modelType;
modelDef.EntityFullName = modelType.FullName;
//modelDef.PropertyDict = new Dictionary<string, DatabaseEntityPropertyDef>();
#endregion
#region 数据库
if (_entitySchemaDict.TryGetValue(modelType.FullName, out EntitySchema dbSchema))
{
modelDef.IsTableModel = true;
modelDef.DatabaseName = dbSchema.DatabaseName;
modelDef.TableName = dbSchema.TableName;
modelDef.DbTableDescription = dbSchema.Description;
modelDef.DbTableReservedName = _databaseEngine.GetReservedStatement(modelDef.TableName);
modelDef.DatabaseWriteable = !dbSchema.ReadOnly;
}
else
{
modelDef.IsTableModel = false;
}
#endregion
#region 属性
foreach (PropertyInfo info in modelType.GetTypeInfo().GetProperties())
{
IEnumerable <Attribute> atts2 = info.GetCustomAttributes(typeof(EntityPropertyIgnoreAttribute), false).Select <object, Attribute>(o => (Attribute)o);
if (atts2 == null || atts2.Count() == 0)
{
DatabaseEntityPropertyDef propertyDef = CreatePropertyDef(modelDef, info);
modelDef.PropertyDict.Add(propertyDef.PropertyName, propertyDef);
modelDef.FieldCount++;
}
}
#endregion
return(modelDef);
}
private DatabaseEntityPropertyDef CreatePropertyDef(DatabaseEntityDef modelDef, PropertyInfo info)
{
DatabaseEntityPropertyDef propertyDef = new DatabaseEntityPropertyDef();
#region 自身
propertyDef.EntityDef = modelDef;
propertyDef.PropertyName = info.Name;
propertyDef.PropertyType = info.PropertyType;
propertyDef.GetMethod = info.GetGetMethod();
propertyDef.SetMethod = info.GetSetMethod();
#endregion
#region 数据库
IEnumerable <Attribute> propertyAttrs = info.GetCustomAttributes(typeof(EntityPropertyAttribute), false).Select(o => (Attribute)o);
if (propertyAttrs != null && propertyAttrs.Count() > 0)
{
EntityPropertyAttribute propertyAttr = propertyAttrs.ElementAt(0) as EntityPropertyAttribute;
propertyDef.IsTableProperty = true;
propertyDef.IsNullable = !propertyAttr.NotNull;
propertyDef.IsUnique = propertyAttr.Unique;
propertyDef.DbLength = propertyAttr.Length > 0 ? (int?)propertyAttr.Length : null;
propertyDef.IsLengthFixed = propertyAttr.FixedLength;
propertyDef.DbDefaultValue = ValueConverter.TypeValueToDbValue(propertyAttr.DefaultValue);
propertyDef.DbDescription = propertyAttr.Description;
if (propertyAttr.ConverterType != null)
{
propertyDef.TypeConverter = _typeConverterFactory.GetTypeConverter(propertyAttr.ConverterType);
}
}
//判断是否是主键
IEnumerable <Attribute> atts1 = info.GetCustomAttributes(typeof(AutoIncrementPrimaryKeyAttribute), false).Select <object, Attribute>(o => (Attribute)o);
if (atts1 != null && atts1.Count() > 0)
{
propertyDef.IsTableProperty = true;
propertyDef.IsAutoIncrementPrimaryKey = true;
propertyDef.IsNullable = false;
propertyDef.IsForeignKey = false;
propertyDef.IsUnique = true;
}
else
{
//判断是否外键
IEnumerable <Attribute> atts2 = info.GetCustomAttributes(typeof(ForeignKeyAttribute), false).Select <object, Attribute>(o => (Attribute)o);
if (atts2 != null && atts2.Count() > 0)
{
propertyDef.IsTableProperty = true;
propertyDef.IsAutoIncrementPrimaryKey = false;
propertyDef.IsForeignKey = true;
//propertyDef.IsNullable = false;
propertyDef.IsUnique = false;
}
}
if (propertyDef.IsTableProperty)
{
propertyDef.DbReservedName = _databaseEngine.GetReservedStatement(propertyDef.PropertyName);
propertyDef.DbParameterizedName = _databaseEngine.GetParameterizedStatement(propertyDef.PropertyName);
if (propertyDef.TypeConverter != null)
{
propertyDef.DbFieldType = propertyDef.TypeConverter.TypeToDbType(propertyDef.PropertyType);
}
else
{
propertyDef.DbFieldType = _databaseEngine.GetDbType(propertyDef.PropertyType);
}
}
#endregion
return(propertyDef);
}
public IList <Tuple <TSource, TTarget> > ToList <TSource, TTarget>(IDataReader reader)
where TSource : DatabaseEntity, new()
where TTarget : DatabaseEntity, new()
{
IList <Tuple <TSource, TTarget> > lst = new List <Tuple <TSource, TTarget> >();
if (reader == null)
{
return(lst);
}
DatabaseEntityDef definition1 = _modelDefFactory.GetDef <TSource>();
DatabaseEntityDef definition2 = _modelDefFactory.GetDef <TTarget>();
string[] propertyNames1 = new string[definition1.FieldCount];
string[] propertyNames2 = new string[definition2.FieldCount];
int j = 0;
for (int i = 0; i < definition1.FieldCount; ++j, ++i)
{
propertyNames1[i] = reader.GetName(j);
}
for (int i = 0; i < definition2.FieldCount; ++j, ++i)
{
propertyNames2[i] = reader.GetName(j);
}
while (reader.Read())
{
TSource t1 = new TSource();
TTarget t2 = new TTarget();
j = 0;
for (int i = 0; i < definition1.FieldCount; ++i, ++j)
{
DatabaseEntityPropertyDef pDef = definition1.GetProperty(propertyNames1[i]);
object fieldValue = reader[j];
if (pDef.PropertyName == "Id" && fieldValue == DBNull.Value)
{
t1 = null;
break;
}
if (pDef != null)
{
object value = pDef.TypeConverter == null?
ValueConverter.DbValueToTypeValue(pDef.PropertyType, fieldValue) :
pDef.TypeConverter.DbValueToTypeValue(fieldValue);
pDef.SetValue(t1, value);
}
}
for (int i = 0; i < definition2.FieldCount; ++i, ++j)
{
DatabaseEntityPropertyDef pDef = definition2.GetProperty(propertyNames2[i]);
object fieldValue = reader[j];
if (pDef.PropertyName == "Id" && fieldValue == DBNull.Value)
{
t2 = null;
break;
}
if (pDef != null)
{
object value = pDef.TypeConverter == null?
ValueConverter.DbValueToTypeValue(pDef.PropertyType, fieldValue) :
pDef.TypeConverter.DbValueToTypeValue(fieldValue);
pDef.SetValue(t2, value);
}
}
if (t1 != null && t1.Deleted)
{
t1 = null;
}
if (t2 != null && t2.Deleted)
{
t2 = null;
}
//删除全为空
if (t1 != null || t2 != null)
{
lst.Add(new Tuple <TSource, TTarget>(t1, t2));
}
}
return(lst);
}
