/// <summary>
/// select count(column)
/// </summary>
/// <param name="func">格式: it => it.Id</param>
public SingleFilter <M> Count <F>(Expression <Func <M, F> > func)
{
var field = DC.EH.ExpressionHandle(func);
DC.AddConditions(new DicModel
{
ColumnOne = field,
Param = field,
ParamRaw = field,
Action = ActionEnum.Select,
Option = OptionEnum.Count,
Crud = CrudTypeEnum.Query
});
return(new SingleFilter <M>(DC));
}
