錯誤的數據顯示按日期電網明智

Question

我試圖顯示日期明智的數據，但我沒有得到答案准確，請幫助我..

public void gettoday() 
    { 
     con.Open(); 
     { 
      string strview = @"select MRNO,MaterialCode,Description,Specification, 
           Category as Cat,Source as Sor,Population as Pop, StockInStores as Stock, MRRating as Rating,PreparedBy,PreparedDate,CheckedBy,CheckedDate,ApprovedBy,ApprovedDate 
         from tbl_KKSMaterialRaise 
         where PreparedDate between (getdate()-1) and (getdate()+1)"; 
      SqlCommand cd = new SqlCommand(strview, con); 
      SqlDataReader reader = cd.ExecuteReader(); 

      GridView1.DataSource = reader; 
      GridView1.DataBind(); 
     } 
     con.Close(); 


    } 

Answer 1

你SQL查詢似乎是不正確。所以你想在昨天和明天之間選擇記錄。

那麼這應該工作（假定SQL-Server因爲你使用GetDate）：

WHERE PreparedDate BETWEEN DateAdd(d,-1,GetDate()) AND DateAdd(d,+1,GetDate()) 

• DATEADD (Transact-SQL)

編輯：除此之外，你應該總是使用using-statement（實施任何對象IDisposable）以確保連接即使在例外的情況下也能關閉：

const string strview = @"select MRNO,MaterialCode,Description,Specification, Category as Cat,Source as Sor,Population as Pop, StockInStores as Stock, MRRating as Rating,PreparedBy,PreparedDate,CheckedBy,CheckedDate,ApprovedBy,ApprovedDate 
         FROM tbl_KKSMaterialRaise 
         WHERE PreparedDate BETWEEN DateAdd(d,-1,GetDate()) AND DateAdd(d,+1,GetDate())"; 
// don't use global connection objects 
using(var con = new SqlConnection(connectionString)) 
using(var cmd = new SqlCommand(strview, con)) 
{ 
    con.Open(); 
    GridView1.DataSource = cmd.ExecuteReader(); 
    GridView1.DataBind(); 
}