public ExecQueryModel()
{
JoinTables = new ObservableCollection <JoinTable>();
RelFields = new ObservableCollection <RelationField>();
SelectedFields = new ObservableCollection <FieldViewModel>();
SelectedConditions = new ObservableCollection <ConditionViewModel>();
SelectedSorts = new ObservableCollection <SortViewModel>();
QueryExecutor = new QueryExecutor(this);
TableSelector = new TableSelector(this);
SelFieldsSelector = new SelFieldsSelector(this);
SortFieldsSelector = new SortFieldsSelector(this);
FilterFieldsSelector = new FilterFieldsSelector(this);
InitDataSource();
}
//基础字段源过滤
public void FilterBaseFieldsSrc()
{
ICollectionView view = ViewSrcBaseFields.View;
if (view == null)
{
return;
}
var baseFields = GetFieldsBySelectedTable();
if (baseFields.IsEmpty())
{
view.Filter = model => { return(1 == 0); };
}
else
{
view.Filter = model => { return(baseFields.Contains((FieldViewModel)model)); };
}
//基础字段发生变化后，查询结果字段、过滤、排序数据源都得更新
SelFieldsSelector.FilterSelFieldsSrc(baseFields);
FilterFieldsSelector.FilterFilterFieldsSrc(baseFields);
SortFieldsSelector.FilterSortFieldsSrc(baseFields);
}