mirror of
https://github.com/nsnail/FreeSql.git
synced 2025-04-24 11:42:51 +08:00
290 lines
12 KiB
C#
290 lines
12 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq.Expressions;
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using System.Threading.Tasks;
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namespace FreeSql {
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public interface ISelect<T1> : ISelect0<ISelect<T1>, T1> where T1 : class {
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/// <summary>
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/// 执行SQL查询，是否有记录
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/// </summary>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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bool Any(Expression<Func<T1, bool>> exp);
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Task<bool> AnyAsync(Expression<Func<T1, bool>> exp);
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/// <summary>
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/// 执行SQL查询，返回 DataTable
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/// </summary>
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/// <returns></returns>
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DataTable ToDataTable<TReturn>(Expression<Func<T1, TReturn>> select);
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Task<DataTable> ToDataTableAsync<TReturn>(Expression<Func<T1, TReturn>> select);
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/// <summary>
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/// 执行SQL查询，返回指定字段的记录，记录不存在时返回 Count 为 0 的列表
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/// </summary>
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/// <typeparam name="TReturn">返回类型</typeparam>
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/// <param name="select">选择列</param>
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/// <returns></returns>
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List<TReturn> ToList<TReturn>(Expression<Func<T1, TReturn>> select);
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Task<List<TReturn>> ToListAsync<TReturn>(Expression<Func<T1, TReturn>> select);
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/// <summary>
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/// 执行SQL查询，返回指定字段的记录的第一条记录，记录不存在时返回 TReturn 默认值
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/// </summary>
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/// <typeparam name="TReturn">返回类型</typeparam>
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/// <param name="select">选择列</param>
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/// <returns></returns>
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TReturn ToOne<TReturn>(Expression<Func<T1, TReturn>> select);
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Task<TReturn> ToOneAsync<TReturn>(Expression<Func<T1, TReturn>> select);
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/// <summary>
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/// 执行SQL查询，返回指定字段的记录的第一条记录，记录不存在时返回 TReturn 默认值
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/// </summary>
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/// <typeparam name="TReturn">返回类型</typeparam>
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/// <param name="select">选择列</param>
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/// <returns></returns>
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TReturn First<TReturn>(Expression<Func<T1, TReturn>> select);
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Task<TReturn> FirstAsync<TReturn>(Expression<Func<T1, TReturn>> select);
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/// <summary>
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/// 返回即将执行的SQL语句
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/// </summary>
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/// <typeparam name="TReturn">返回类型</typeparam>
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/// <param name="select">选择列</param>
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/// <returns></returns>
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string ToSql<TReturn>(Expression<Func<T1, TReturn>> select);
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/// <summary>
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/// 执行SQL查询，返回指定字段的聚合结果
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/// </summary>
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/// <typeparam name="TReturn"></typeparam>
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/// <param name="select"></param>
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/// <returns></returns>
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TReturn ToAggregate<TReturn>(Expression<Func<ISelectGroupingAggregate<T1>, TReturn>> select);
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Task<TReturn> ToAggregateAsync<TReturn>(Expression<Func<ISelectGroupingAggregate<T1>, TReturn>> select);
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/// <summary>
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/// 求和
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/// </summary>
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/// <typeparam name="TMember">返回类型</typeparam>
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/// <param name="column">列</param>
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/// <returns></returns>
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TMember Sum<TMember>(Expression<Func<T1, TMember>> column);
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Task<TMember> SumAsync<TMember>(Expression<Func<T1, TMember>> column);
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/// <summary>
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/// 最小值
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/// </summary>
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/// <typeparam name="TMember">返回类型</typeparam>
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/// <param name="column">列</param>
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/// <returns></returns>
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TMember Min<TMember>(Expression<Func<T1, TMember>> column);
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Task<TMember> MinAsync<TMember>(Expression<Func<T1, TMember>> column);
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/// <summary>
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/// 最大值
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/// </summary>
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/// <typeparam name="TMember">返回类型</typeparam>
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/// <param name="column">列</param>
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/// <returns></returns>
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TMember Max<TMember>(Expression<Func<T1, TMember>> column);
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Task<TMember> MaxAsync<TMember>(Expression<Func<T1, TMember>> column);
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/// <summary>
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/// 平均值
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/// </summary>
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/// <typeparam name="TMember">返回类型</typeparam>
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/// <param name="column">列</param>
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/// <returns></returns>
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TMember Avg<TMember>(Expression<Func<T1, TMember>> column);
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Task<TMember> AvgAsync<TMember>(Expression<Func<T1, TMember>> column);
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/// <summary>
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/// 指定别名
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/// </summary>
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/// <param name="alias">别名</param>
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/// <returns></returns>
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ISelect<T1> As(string alias = "a");
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2> From<T2>(Expression<Func<ISelectFromExpression<T1>, T2, ISelectFromExpression<T1>>> exp) where T2 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3> From<T2, T3>(Expression<Func<ISelectFromExpression<T1>, T2, T3, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4> From<T2, T3, T4>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <typeparam name="T5"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4, T5> From<T2, T3, T4, T5>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, T5, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class where T5 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <typeparam name="T5"></typeparam>
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/// <typeparam name="T6"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4, T5, T6> From<T2, T3, T4, T5, T6>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, T5, T6, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class where T5 : class where T6 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <typeparam name="T5"></typeparam>
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/// <typeparam name="T6"></typeparam>
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/// <typeparam name="T7"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4, T5, T6, T7> From<T2, T3, T4, T5, T6, T7>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, T5, T6, T7, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class where T5 : class where T6 : class where T7 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <typeparam name="T5"></typeparam>
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/// <typeparam name="T6"></typeparam>
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/// <typeparam name="T7"></typeparam>
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/// <typeparam name="T8"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4, T5, T6, T7, T8> From<T2, T3, T4, T5, T6, T7, T8>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, T5, T6, T7, T8, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class where T5 : class where T6 : class where T7 : class where T8 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <typeparam name="T5"></typeparam>
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/// <typeparam name="T6"></typeparam>
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/// <typeparam name="T7"></typeparam>
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/// <typeparam name="T8"></typeparam>
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/// <typeparam name="T9"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4, T5, T6, T7, T8, T9> From<T2, T3, T4, T5, T6, T7, T8, T9>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, T5, T6, T7, T8, T9, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class where T5 : class where T6 : class where T7 : class where T8 : class where T9 : class;
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/// <summary>
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/// 多表查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <typeparam name="T5"></typeparam>
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/// <typeparam name="T6"></typeparam>
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/// <typeparam name="T7"></typeparam>
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/// <typeparam name="T8"></typeparam>
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/// <typeparam name="T9"></typeparam>
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/// <typeparam name="T10"></typeparam>
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/// <param name="exp"></param>
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/// <returns></returns>
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ISelect<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> From<T2, T3, T4, T5, T6, T7, T8, T9, T10>(Expression<Func<ISelectFromExpression<T1>, T2, T3, T4, T5, T6, T7, T8, T9, T10, ISelectFromExpression<T1>>> exp) where T2 : class where T3 : class where T4 : class where T5 : class where T6 : class where T7 : class where T8 : class where T9 : class where T10 : class;
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/// <summary>
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/// 查询条件，Where(a => a.Id > 10)，支持导航对象查询，Where(a => a.Author.Email == "2881099@qq.com")
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/// </summary>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> Where(Expression<Func<T1, bool>> exp);
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/// <summary>
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/// 查询条件，Where(true, a => a.Id > 10)，支导航对象查询，Where(true, a => a.Author.Email == "2881099@qq.com")
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/// </summary>
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/// <param name="condition">true 时生效</param>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> WhereIf(bool condition, Expression<Func<T1, bool>> exp);
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/// <summary>
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/// 多表条件查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> Where<T2>(Expression<Func<T1, T2, bool>> exp) where T2 : class;
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/// <summary>
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/// 多表条件查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> Where<T2>(Expression<Func<T2, bool>> exp) where T2 : class;
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/// <summary>
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/// 多表条件查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> Where<T2, T3>(Expression<Func<T1, T2, T3, bool>> exp) where T2 : class where T3 : class;
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/// <summary>
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/// 多表条件查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> Where<T2, T3, T4>(Expression<Func<T1, T2, T3, T4, bool>> exp) where T2 : class where T3 : class where T4 : class;
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/// <summary>
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/// 多表条件查询
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/// </summary>
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/// <typeparam name="T2"></typeparam>
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/// <typeparam name="T3"></typeparam>
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/// <typeparam name="T4"></typeparam>
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/// <param name="exp">lambda表达式</param>
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/// <returns></returns>
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ISelect<T1> Where<T2, T3, T4, T5>(Expression<Func<T1, T2, T3, T4, T5, bool>> exp) where T2 : class where T3 : class where T4 : class where T5 : class;
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/// <summary>
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/// 传入动态对象如：主键值 | new[]{主键值1,主键值2} | TEntity1 | new[]{TEntity1,TEntity2} | new{id=1}
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/// </summary>
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/// <param name="dywhere">主键值、主键值集合、实体、实体集合、匿名对象、匿名对象集合</param>
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/// <returns></returns>
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ISelect<T1> WhereDynamic(object dywhere);
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/// <summary>
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/// 按选择的列分组，GroupBy(a => a.Name) | GroupBy(a => new{a.Name,a.Time})
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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ISelectGrouping<TKey, T1> GroupBy<TKey>(Expression<Func<T1, TKey>> exp);
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/// <summary>
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/// 按列排序，OrderBy(a => a.Time)
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/// </summary>
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/// <typeparam name="TMember"></typeparam>
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/// <param name="column"></param>
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/// <returns></returns>
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ISelect<T1> OrderBy<TMember>(Expression<Func<T1, TMember>> column);
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/// <summary>
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/// 按列倒向排序，OrderByDescending(a => a.Time)
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/// </summary>
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/// <param name="column">列</param>
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/// <returns></returns>
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ISelect<T1> OrderByDescending<TMember>(Expression<Func<T1, TMember>> column);
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}
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} |