/// <summary>
/// 判断GroupByClip是否为null或空
/// </summary>
/// <param name="where"></param>
/// <returns></returns>
public static bool IsNullOrEmpty(GroupByClip group)
{
if ((object)group == null || string.IsNullOrEmpty(group.ToString()))
{
return(true);
}
return(false);
}
/// <summary>
/// 自定义一个GroupBy条件
/// </summary>
/// <param name="fields"></param>
public GroupByClip(params Field[] fields)
{
if (fields != null && fields.Length > 0)
{
GroupByClip group = GroupByClip.None;
foreach (Field field in fields)
{
group &= field.Group;
}
this.groupBy = group.ToString();
}
}
/// <summary>
/// 进行GroupBy操作
/// </summary>
/// <param name="groupBy"></param>
/// <returns></returns>
public QuerySection <T> GroupBy(GroupByClip groupBy)
{
return(query.GroupBy(groupBy));
}
/// <summary>
/// 进行GroupBy操作
/// </summary>
/// <param name="groupBy"></param>
/// <returns></returns>
public QuerySection <T> GroupBy(GroupByClip groupBy)
{
this.groupBy = groupBy;
return(this);
}
/// <summary>
/// 进行分组操作
/// </summary>
/// <param name="groupBy"></param>
/// <returns></returns>
public TableRelation <T> GroupBy(GroupByClip groupBy)
{
section.GroupBy(groupBy);
return(this);
}