C# oracle to_date 日期型 參數傳值

C#操作oracle，date字段，使用參數傳值

例子一，獲取三小時前的記錄

 
          public  
          static DataTable Query() 
          
 { 
          
      
          const  
          string sSql =  
          " 
          select xh,lsh,name from table where gxsj>to_date(:gxsj,'yyyy-MM-dd HH24:mi:ss') 
          "; 
          
     OracleParameter[] parameters = { 
          new OracleParameter( 
          " 
          :gxsj 
          ", OracleType.VarChar,  
          10)}; 
          
     parameters[ 
          0].Value = DateTime.Now.AddHours(- 
          3).ToString( 
          " 
          yyyy-MM-dd HH 
          ") +  
          " 
          :00:00 
          "; 
          
      
          return DBUtility.DbHelperOra.Query(sSql, parameters).Tables[ 
          0]; 
          
 } 
         

 例子二，獲取大於當前時間的記錄

 
          public  
          static  
          string GetHphm( 
          string sClsbdh) 
          
 { 
          
      
          const  
          string sSql =  
          " 
          select name from table where sj>to_date(:yxsj,'yyyy-MM-dd') 
          "; 
          
     OracleParameter[] paramters = { 
          new OracleParameter( 
          " 
          sj 
          ", OracleType.VarChar,  
          10)}; 
          
     paramters[ 
          0].Value = DateTime.Now.ToString( 
          " 
          yyyy-MM-dd 
          "); 
          
 
          
      
          using ( 
          var mReader = DbHelperOra.ExecuteReader(sSql, paramters)) 
          
     { 
          
              
          if (mReader.Read()) 
          
             { 
          
              
          return mReader[ 
          " 
          name 
          "].ToString(); 
          
             } 
          
     } 
          
 
          
      
          return  
          ""; 
          
 }