Dapper 查询，结合属性与分页一起使用

Posted 2023-05-08

【中文标题】Dapper 查询，结合属性与分页一起使用

【英文标题】：Dapper query, combining attributes to use with pagination

【发布时间】：2018-12-21 13:54:50

【问题描述】：

我有显示我所有船只的查询，但我只想显示活动船只。

    public Pagination<Boats> GetAll(string name , int pageSize, int pageNumber)
    
        var cn = Db.Database.Connection;

        var sql = @"SELECT * FROM Boats" +
                  "WHERE (@Name IS NULL OR Name LIKE @Name + '%')" +
                  "ORDER BY [Name ] " +
                  "OFFSET " + pageSize * (pageNumber - 1) + " ROWS " +
                  "FETCH NEXT " + pageSize + " ROWS ONLY " +
                  " " +
                  "SELECT COUNT(Id) FROM Boats" +
                  "WHERE (@Name IS NULL OR Name LIKE @Name + '%')";

        var multi = cn.QueryMultiple(sql, new  Name = name );
        var boats= multi.Read<Boats >();
        var total = multi.Read<int>().FirstOrDefault();

        var paginationList= new Pagination<Boats>()
        
            List = boats,
            Count = total
        ;

        return paginationList;

    

我在表中有活动和排除属性，所以我试图只显示活动的船，但是通过这个查询，它不断返回船表中的所有记录，比如第一个

                  var sql = @"SELECT * FROM Boats " +
                  "WHERE (@Name IS NULL OR Name LIKE @Name + '%' AND  Active=1 AND Excluded=0)" +
                  "ORDER BY [Name] " +
                  "OFFSET " + pageSize * (pageNumber - 1) + " ROWS " +
                  "FETCH NEXT " + pageSize + " ROWS ONLY " +
                  " " +
                  "SELECT COUNT(Id) FROM Boats " +
                  "WHERE (@Name IS NULL OR Name LIKE @Name + '%' AND  Active=1 AND Excluded=0)";

任何想法如何将 Name 属性与 Active 和 Excluded 属性结合起来？

【参考方案1】：

从括号中删除：

"WHERE (@Name IS NULL OR Name LIKE @Name + '%') AND Active=1 AND Excluded=0"