FreeSql

Table of Contents

20 data per page, query page 1
Optimization
API
Reference

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static IFreeSql fsql = new FreeSql.FreeSqlBuilder()
    .UseConnectionString(FreeSql.DataType.MySql, connectionString)
    .Build(); //Be sure to define as singleton mode

class Topic {
    [Column(IsIdentity = true)]
    public int Id { get; set; }
    public string Title { get; set; }
    public int Clicks { get; set; }
    public DateTime CreateTime { get; set; }

    public int CategoryId { get; set; }
}

20 data per page, query page 1

var list = fsql.Select<Topic>()
    .Where(a => a.Id > 10)
    .Count(out var total) //Total number of records
    .Page(1, 20)
    .Tolist();

Count(out var total) is a synchronous method, because out does not support asynchrony. If you mind, you can execute it separately as follows:

var select = fsql.Select<Topic>()
    .Where(a => a.Id > 10);
var total = await select.CountAsync();
var list = await select.Page(1, 20).ToListAsync();

Optimization

For the previous versions of SqlServer 2012, use row_number for pagination;

For SqlServer 2012+ version, using the latest fetch next rows pagination;

API

Methods	Return	Parameters	Description
ToSql	string		Return the SQL statement to be executed
ToList	List<T1>		Execute SQL query, and return the records of all the fields of the `T1` entity. If there are navigation properties, they will be queried and returned together. If the record does not exist, a list with `Count` of `0` will be returned.
ToList<T>	List<T>	Lambda	Execute SQL query, and return the record of the specified fields. If the record does not exist, a list with `Count` of `0` will be returned.
ToList<T>	List<T>	string field	Execute SQL query, and return the record of the specified fields of the parameters, and receive it as a tuple or basic type (`int`, `string`, `long`). If the record does not exist, a list with `Count` of `0` will be returned.
【Pagination】
Count	long		Number of records queried
Count	<this>	out long	The number of records to be queried, returned in the form of parameter with `out`
Skip	<this>	int offset	Query the number of rows shifted backward
Offset	<this>	int offset	Query the number of rows shifted backward
Limit	<this>	int limit	Number of query data
Take	<this>	int limit	Number of query data
Page	<this>	int pageIndex, int pageSize	Pagination

20 data per page, query page 1

Optimization

API

Reference

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