/// <summary>
/// 使用这个查询面板中的查询对象数据，
/// 给实体的外键设置值。
/// </summary>
/// <param name="entity"></param>
internal void SyncRefEntities(Entity entity)
{
if (entity == null)
{
throw new ArgumentNullException("newEntity");
}
var criteria = this.Current;
if (criteria != null)
{
var destProperties = entity.PropertiesContainer.GetAvailableProperties();
//对每一个导航的实体引用属性，都给 referenceEntity 赋相应的值
//只有导航查询实体中的引用实体ID属性名和被查询实体的引用实体ID属性名相同时，才能设置
foreach (var naviProperty in this.Meta.EntityProperties)
{
//如果是一个引用实体属性
var criteriaRefId = naviProperty.PropertyMeta.ManagedProperty as IRefIdProperty;
if (criteriaRefId != null)
{
foreach (var mp in destProperties)
{
var entityRef = mp as IRefEntityProperty;
//约定：被查询实体的引用实体ID属性名与 naviProperty 的名称相同，并且二者类型一致时，才能被设置。
if (entityRef != null &&
entityRef.RefIdProperty.Name == criteriaRefId.Name &&
criteriaRefId.RefEntityType == entityRef.RefEntityType
)
{
//读值，并写值到新对象中。
var value = criteria.GetRefEntity(criteriaRefId.RefEntityProperty);
entity.SetRefEntity(entityRef, value);
break;
}
}
}
}
}
}
/// <summary>
/// 单选模式下的写值操作
/// </summary>
/// <param name="curEntity">正在编辑的实体。</param>
/// <param name="svm">选择视图模型</param>
/// <param name="selectedEntities">当前被选择的实体</param>
private SetSelectionResult SyncSelectionToValue_Single(Entity curEntity, SelectionViewMeta svm, IList <Entity> selectedEntities)
{
bool success = false;
//引用属性，应该先尝试设置实体属性，再设置 Id 属性。
var rp = this.Meta.PropertyMeta.ManagedProperty as IRefProperty;
if (selectedEntities.Count > 0)
{
var selectedEntity = selectedEntities[0] as Entity;
if (rp != null)
{
//如果 SelectedValuePath 是一个引用属性，或者直接就是一个实体属性，
//则应该获取相应的实体的值。
var valuePath = svm.SelectedValuePath;
if (valuePath != null)
{
if (valuePath is IRefProperty)
{
selectedEntity = selectedEntity.GetRefEntity((valuePath as IRefProperty).RefEntityProperty);
}
else if (rp.RefEntityType.IsAssignableFrom(valuePath.PropertyType))
{
selectedEntity = this.GetSelectedValue(selectedEntity) as Entity;
}
}
//设置实体到本引用属性上。
this.OnReferenceEntityChanging();
curEntity.SetRefEntity(rp.RefEntityProperty, selectedEntity, ManagedPropertyChangedSource.FromUIOperating);
success = curEntity.GetRefEntity(rp.RefEntityProperty) == selectedEntity;
if (success)
{
this.OnReferenceEntityChanged();
}
}
else
{
var value = this.GetSelectedValue(selectedEntity);
this.PropertyValue = value;
success = this.PropertyValue == value;
if (success && svm.RefIdHost != null)
{
curEntity.SetProperty(svm.RefIdHost, selectedEntity.Id, ManagedPropertyChangedSource.FromUIOperating);
}
}
}
else
{
if (rp != null)
{
this.OnReferenceEntityChanging();
curEntity.SetRefEntity(rp.RefEntityProperty, null, ManagedPropertyChangedSource.FromUIOperating);
success = curEntity.GetRefEntity(rp.RefEntityProperty) == null;
if (success)
{
this.OnReferenceEntityChanged();
}
}
else
{
this.PropertyValue = null;
success = this.PropertyValue == null;
if (success && svm.RefIdHost != null)
{
curEntity.SetProperty(svm.RefIdHost, null, ManagedPropertyChangedSource.FromUIOperating);
}
}
}
return(success ? SetSelectionResult.Success : SetSelectionResult.Cancel);
}
/// <summary>
/// 单选模式下的写值操作
/// </summary>
/// <param name="curEntity">正在编辑的实体。</param>
/// <param name="svm">选择视图模型</param>
/// <param name="selectedEntities">当前被选择的实体</param>
private SetSelectionResult SyncSelectionToValue_Single(Entity curEntity, SelectionViewMeta svm, IList<Entity> selectedEntities)
{
bool success = false;
//引用属性，应该先尝试设置实体属性，再设置 Id 属性。
var rp = this.Meta.PropertyMeta.ManagedProperty as IRefProperty;
if (selectedEntities.Count > 0)
{
var selectedEntity = selectedEntities[0] as Entity;
if (rp != null)
{
//如果 SelectedValuePath 是一个引用属性，或者直接就是一个实体属性，
//则应该获取相应的实体的值。
var valuePath = svm.SelectedValuePath;
if (valuePath != null)
{
if (valuePath is IRefProperty)
{
selectedEntity = selectedEntity.GetRefEntity((valuePath as IRefProperty).RefEntityProperty);
}
else if (rp.RefEntityType.IsAssignableFrom(valuePath.PropertyType))
{
selectedEntity = this.GetSelectedValue(selectedEntity) as Entity;
}
}
//设置实体到本引用属性上。
this.OnReferenceEntityChanging();
curEntity.SetRefEntity(rp.RefEntityProperty, selectedEntity, ManagedPropertyChangedSource.FromUIOperating);
success = curEntity.GetRefEntity(rp.RefEntityProperty) == selectedEntity;
if (success) { this.OnReferenceEntityChanged(); }
}
else
{
var value = this.GetSelectedValue(selectedEntity);
this.PropertyValue = value;
success = this.PropertyValue == value;
if (success && svm.RefIdHost != null)
{
curEntity.SetProperty(svm.RefIdHost, selectedEntity.Id, ManagedPropertyChangedSource.FromUIOperating);
}
}
}
else
{
if (rp != null)
{
this.OnReferenceEntityChanging();
curEntity.SetRefEntity(rp.RefEntityProperty, null, ManagedPropertyChangedSource.FromUIOperating);
success = curEntity.GetRefEntity(rp.RefEntityProperty) == null;
if (success) { this.OnReferenceEntityChanged(); }
}
else
{
this.PropertyValue = null;
success = this.PropertyValue == null;
if (success && svm.RefIdHost != null)
{
curEntity.SetProperty(svm.RefIdHost, null, ManagedPropertyChangedSource.FromUIOperating);
}
}
}
return success ? SetSelectionResult.Success : SetSelectionResult.Cancel;
}
/// <summary>
/// 使用这个查询面板中的查询对象数据，
/// 给实体的外键设置值。
/// </summary>
/// <param name="entity"></param>
internal void SyncRefEntities(Entity entity)
{
if (entity == null) throw new ArgumentNullException("newEntity");
var criteria = this.Current;
if (criteria != null)
{
var destProperties = entity.PropertiesContainer.GetAvailableProperties();
//对每一个导航的实体引用属性，都给 referenceEntity 赋相应的值
//只有导航查询实体中的引用实体ID属性名和被查询实体的引用实体ID属性名相同时，才能设置
foreach (var naviProperty in this.Meta.EntityProperties)
{
//如果是一个引用实体属性
var criteriaRefId = naviProperty.PropertyMeta.ManagedProperty as IRefIdProperty;
if (criteriaRefId != null)
{
foreach (var mp in destProperties)
{
var entityRef = mp as IRefEntityProperty;
//约定：被查询实体的引用实体ID属性名与 naviProperty 的名称相同，并且二者类型一致时，才能被设置。
if (entityRef != null
&& entityRef.RefIdProperty.Name == criteriaRefId.Name
&& criteriaRefId.RefEntityType == entityRef.RefEntityType
)
{
//读值，并写值到新对象中。
var value = criteria.GetRefEntity(criteriaRefId.RefEntityProperty);
entity.SetRefEntity(entityRef, value);
break;
}
}
}
}
}
}
