語法返回每頁結果數

Question

我有這個linq語句返回結果，我想添加每頁顯示多少項目的規格。我知道默認值是每頁10個，我怎樣才能將它改爲40？

var _roster = DataCBase.StoredProcedures.GetUser<Users>(userID, r => new Users 
     { 
      Name = RosterColumnMap.Name(r), 
      Email = RosterColumnMap.Email(r) 
     }); 

獲得用戶

public virtual IEnumerable<T> GetUser<T>(int userId, Func<IDataRecord, T> modelBinder, int resultsPerPage = 10, int pageNumber = 1) 
    { 
     if (userId < 1) 
      throw new NullReferenceException("The sectionId cannot be null, when retreiving an element"); 

     if (resultsPerPage < 1) 
      resultsPerPage = 1;  // enforce bare minimum result set 

     if (pageNumber < 1) 
      pageNumber = 1;   // enforce one-based page numbering 

     SqlCommand _command = new SqlCommand("dbo.GetUser"); 
     _command.CommandType = CommandType.StoredProcedure; 
     _command.Parameters.Add(new SqlParameter { ParameterName = "userId", SqlDbType = SqlDbType.Int, Value = userId }); 
     _command.Parameters.Add(new SqlParameter { ParameterName = "resultsPerPage", SqlDbType = SqlDbType.Int, Value = resultsPerPage }); 
     _command.Parameters.Add(new SqlParameter { ParameterName = "pageNumber", SqlDbType = SqlDbType.Int, Value = pageNumber }); 

     return DbInstance.ExecuteAs<T>(_command, modelBinder); 
    } 

Answer 1

無論LINQ的，也不實體框架有記錄的 '每頁' 任何默認號碼。但你的GetUser功能包括resultsPerPage參數，你可以這樣做：

var _roster = DataCBase.StoredProcedures.GetUser<Users>(userID, r => new Users 
    { 
     Name = RosterColumnMap.Name(r), 
     Email = RosterColumnMap.Email(r) 
    }, 40); 

要限制的結果Linq中的數量使用的Enumerable.Take方法：

var _roster = DataCBase.StoredProcedures.GetUser<Users>(userID, r => new Users 
    { 
     Name = RosterColumnMap.Name(r), 
     Email = RosterColumnMap.Email(r) 
    }).Take(40);