LinqExpression.cs
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using NCC.Dependency;
using System;
using System.Linq.Expressions;
namespace NCC.LinqBuilder
{
/// <summary>
/// EF Core Linq 拓展
/// </summary>
[SuppressSniffer]
public static class LinqExpression
{
/// <summary>
/// 创建 Linq/Lambda 表达式
/// </summary>
/// <typeparam name="TSource">泛型类型</typeparam>
/// <param name="expression">表达式</param>
/// <returns>新的表达式</returns>
public static Expression<Func<TSource, bool>> Create<TSource>(Expression<Func<TSource, bool>> expression)
{
return expression;
}
/// <summary>
/// 创建 Linq/Lambda 表达式，支持索引器
/// </summary>
/// <typeparam name="TSource">泛型类型</typeparam>
/// <param name="expression">表达式</param>
/// <returns>新的表达式</returns>
public static Expression<Func<TSource, int, bool>> Create<TSource>(Expression<Func<TSource, int, bool>> expression)
{
return expression;
}
/// <summary>
/// 创建 And 表达式
/// </summary>
/// <typeparam name="TSource">泛型类型</typeparam>
/// <returns>新的表达式</returns>
public static Expression<Func<TSource, bool>> And<TSource>()
{
return u => true;
}
/// <summary>
/// 创建 And 表达式，支持索引器
/// </summary>
/// <typeparam name="TSource">泛型类型</typeparam>
/// <returns>新的表达式</returns>
public static Expression<Func<TSource, int, bool>> IndexAnd<TSource>()
{
return (u, i) => true;
}
/// <summary>
/// 创建 Or 表达式
/// </summary>
/// <typeparam name="TSource">泛型类型</typeparam>
/// <returns>新的表达式</returns>
public static Expression<Func<TSource, bool>> Or<TSource>()
{
return u => false;
}
/// <summary>
/// 创建 Or 表达式，支持索引器
/// </summary>
/// <typeparam name="TSource">泛型类型</typeparam>
/// <returns>新的表达式</returns>
public static Expression<Func<TSource, int, bool>> IndexOr<TSource>()
{
return (u, i) => false;
}
}
}