&& (与操作) 子表达式可以通过&&合并来查询满足所有子表达式的文档 var query = from c in collection.AsQueryable() where...c.X > 0 && c.Y > 0 select c; // or var query = collection.AsQueryable() .Where(c...var query = from c in collection.AsQueryable() where c.A.Any() select c; // or var...query = collection.AsQueryable() .Where(c => c.A.Any()); 如果A存在一个或者多个项,则会匹配。...from c in collection.AsQueryable() 3. where c.A.Contains(123) 4.
实例: var query = from e in collection.AsQueryable() where e.FirstName == "John"...Any 不含谓词的Any只是测试集合中是否存在any文档对象(any直接引用过来,大家都明白) var result = (from c in collection.AsQueryable() select c) .Any(); // 或者 var result = collection.AsQueryable() .Any(); Any...select c) .Any(c => c.X == 1); // or var result = collection.AsQueryable() .Any(c...= collection.AsQueryable() .Count(); Count (带谓词) 带有谓词的Count返回谓词匹配的文档数量。
EndsWith 此方法用于测试文档对象的字符串类型的字段或者属性是否以某一个特定的字串结束 var query = from c in collection.AsQueryable()... where c.S.EndsWith("abc") select c; // or var query = collection.AsQueryable() .Where...public enum E { None, A, B }; var query = from c in collection.AsQueryable() where c.E =...(Not 操作符) 此方法用于对测试结果进行逻辑非操作 var query = from c in collection.AsQueryable() where !...(c.X > 1) select c; // or var query = collection.AsQueryable() .Where(c => !
; } public string Name { get; set; } } 先看一个简单的, 此时 p1 和 p2 是相等的 // 字符串 var p1 = people.AsQueryable...ApplyFiltering("Age=18").ToList(); //等同于 LINQ var p2 = people.Where(x => x.Age==18).ToList(); OR people.AsQueryable...=Lee | Name=Mark").ToList(); people.Where(x => x.Name=="Lee"|| x.Name=="Mark").ToList(); AND people.AsQueryable...=18 , Name=James").ToList(); people.Where(x => x.Age==18&& x.Name=="James").ToList(); 模糊查询 people.AsQueryable...).ApplyFiltering("Name=*a").ToList(); people.Where(x => x.Name.Contains("a")).ToList(); 排序 people.AsQueryable
[Test] public void Normal() { var re = Enumerable.Range(0, 10).AsQueryable() // 0-9 .Where...Expression> filter = x => x >= 1 && x < 5; var re = Enumerable.Range(0, 10).AsQueryable...> filter = x => x >= minValue && x < maxValue; var re = Enumerable.Range(0, 10).AsQueryable...public void Expression02() { var filter = CreateFilter(1, 5); var re = Enumerable.Range(0, 10).AsQueryable...= JoinSubFilters(Expression.AndAlso, x => x >= 1, x => x < 5); var re = Enumerable.Range(0, 10).AsQueryable
BsonDocument>(builderFilter.Empty).Count(); 4.9Linq查询 //创建生成器//linq var result = from y in coll.AsQueryable...builderFilter = Builders.Filter; //分组 var result = from y in coll.AsQueryable...} 4.11连表查询 //linq //连表查询 在这里是自己连自己 var result = from u in coll.AsQueryable...() join o in coll.AsQueryable() on u["_id"] equals o["_id"] select new { DepartmentName1 = u["DepartmentName
GetAsync(string id, CancellationToken cancellationToken) { var question = await _questionCollection.AsQueryable...FromQuery] int skip = 0, [FromQuery] int limit = 10) { //// linq 查询 //await _questionCollection.AsQueryable...CancellationToken cancellationToken) { // linq 查询 var query = from question in _questionCollection.AsQueryable...() where question.Id == id join a in _answerCollection.AsQueryable()...questionId, CancellationToken cancellationToken) { var list = await _answerCollection.AsQueryable
= namesList.Count - 1) nameSql += " OR ";}var list = _student.AsQueryable() .WhereIF(args.Names.IsNotNullAndEmpty...foreach (var name in namesList){ exp_names.Or(t => t.names.Contains(name));}var list = _rulegroup.AsQueryable
ResultLimit=20)] public IQueryable Get() { return this.repository.GetAll().AsQueryable...(); } 只需要通过 .AsQueryable() 的帮忙,即可帮我们转换。
Db表的映射类,即:Select(c => new ba_unit())时会报错 IQueryable queryUnit2 = dbContext.ba_unit.AsQueryable...ba_unit> listUnit3 = new List(); IQueryable queryUnit3 = dbContext.ba_unit.AsQueryable...var listP3 = queryUnit3.Where(c => c.UnitCode == "U001").Select("new (UnitCode, UnitName)").AsQueryable
{ var redis = redisClient.As(); return redis.GetAll().AsQueryable...filtered.Select(c => c.Key); var ret = _redisManager.GetClient().As().GetByIds(ids).AsQueryable...filtered.Select(c => c.Key); var ret = _redisManager.GetClient().As().GetByIds(ids).AsQueryable
HotelModelContainer db = new HotelModelContainer(); return db.Customer.Where(whereLambda).AsQueryable...Skip(pageSize * (pageIndex - 1)) .Take(pageSize) .AsQueryable
numbers = { 1, 2, 3, 4, 5 }; //构建查询对象(注意:在此处还没有执行查询) IQueryable query = numbers.AsQueryable...输出结果为:20 // 60 // 40 } } 在上面的示例中,我们首先创建了一个整数数组 numbers,然后通过 AsQueryable
} }; // "张三,李四".Contains(Name) && (Age==19 || Age==18) var count = list.www.laipuhuo.com AsQueryable
() where stu.age > 22 select stu).ToList(); //2.点语法 List stuList2 = stuCollection.AsQueryable...--------表连接,查询学生的班级名----------------"); //1.query语法 var result1 = from stu in stuCollection.AsQueryable...() join cls in clsCollection.AsQueryable() on stu.classNo equals cls.no select new {...stuno = stu.no, stu.stuName, cls.clsName }; //2.点语法 var result2 = stuCollection.AsQueryable...().Join(clsCollection.AsQueryable(), stu => stu.classNo, cls => cls.no, (stu, cls) => new {
cancellationToken) { // linq 查询 var question = await _questionCollection.AsQueryable...skip = 0, int limit = 10) { //// linq 查询 //await _questionCollection.AsQueryable...cancellationToken) { // linq 查询 var query = from question in _questionCollection.AsQueryable...() where question.Id == id join a in _answerCollection.AsQueryable()
Expression.Lambda(Expression.Property(param, sortExpression), param)); IQueryable query = source.AsQueryable...Expression.Lambda(Expression.Property(param, sortExpression), param)); 生成排序表达式 IQueryable query = source.AsQueryable
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