計數然後插入其他更新

Question

我有下面的代碼，我想要做一個計數，如果（計數）== 0比插入其他update.I似乎無法弄清楚什麼是錯誤的頁面應該如果查詢完成但轉到下一頁，但頁面只能重新加載，並且沒有插入或更新數據。當我按下按鈕時應執行此操作。您可以幫我解決這個問題嗎？我問過，但沒有answer.I現在由我自己嘗試過，但似乎無法看到什麼是problem.Sorry的重複

string ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; 
      if (string.IsNullOrEmpty(ip)) 
      { 
       ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; 
      } 


      String id_sesiune; 
      id_sesiune = Session.SessionID; 

      SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["chestionar"].ConnectionString); 
      con.Open(); 
      SqlCommand cmd1 = new SqlCommand("SELECT count(*) from Raspunsuri where id_intrebare=2",con); 

      int read = Convert.ToInt16(cmd1.ExecuteScalar()); 


      if (read == 0) 
      { 
       SqlCommand cmd = new SqlCommand("INSERT INTO Raspunsuri Values(@raspuns,@cnp,@data,'2',@ip,@idsesiune)", con); 
       cmd.Parameters.AddWithValue("@cnp", Session["sesiune_cnp"]); 
       cmd.Parameters.AddWithValue("@raspuns", textbox2.Text); 
       cmd.Parameters.AddWithValue("@data", DateTime.Now.ToLocalTime()); 
       cmd.Parameters.AddWithValue("@ip", ip); 
       cmd.Parameters.AddWithValue("@idsesiune", id_sesiune); 

       try 
       { 
        con.Open(); 
        cmd.ExecuteNonQuery(); 
        Response.Redirect("User3.aspx"); 
       } 

       catch (Exception ex) 
       { 
        Console.WriteLine("Error:" + ex); 
       } 
       finally 
       { 
        con.Close(); 
       } 


      } 

      else 
      { 

       SqlCommand cmd = new SqlCommand("UPDATE Raspunsuri SET raspuns=@raspuns,cod_numeric_personal=@cnp,data_raspuns=@data,id_intrebare=2,ip_user=@ip,id_sesiune=@idsesiune WHERE id_intrebare=2", con); 
       cmd.Parameters.AddWithValue("@cnp", Session["sesiune_cnp"]); 
       cmd.Parameters.AddWithValue("@raspuns", textbox2.Text); 
       cmd.Parameters.AddWithValue("@data", DateTime.Now.ToLocalTime()); 
       cmd.Parameters.AddWithValue("@ip", ip); 
       cmd.Parameters.AddWithValue("@idsesiune", id_sesiune); 

       try 
       { 
        con.Open(); 
        cmd.ExecuteNonQuery(); 
        Response.Redirect("User3.aspx"); 
       } 

       catch (Exception ex) 
       { 
        Console.WriteLine("Error:" + ex); 
       } 
       finally 
       { 
        con.Close(); 
       } 

      } 

Answer 1

當我陷入這種情況，我會恢復到一個存儲程序。

CREATE PROCEDURE UpsertRasPunsuri(@keyID int, @cnp int, @raspuns nvarchar(30), 
        @data smalldatetime, @ip nvarchar(30), @idsesiune int) 
    AS 
    BEGIN 
     declare @cnt int 
     SELECT @cnt = count(*) from Raspunsuri where id_intrebare=@keyID 
     if @cnt = 0 
      INSERT INTO Raspunsuri Values(@raspuns,@cnp,@data,2,@ip,@idsesiune) 
     else 
      UPDATE Raspunsuri SET 
        raspuns=@raspuns,cod_numeric_personal=@cnp,data_raspuns=@data, 
        id_intrebare=2,ip_user=@ip,id_sesiune=@idsesiune 
      WHERE id_intrebare=@keyID  
    END 

現在你的代碼簡化了這種方式

try 
{ 
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["chestionar"].ConnectionString); 
    con.Open(); 
    SqlCommand cmd = new SqlCommand("UpsertRasPunsuri",con); 
    cmd.CommandType = CommandType.StoredProcedure; 
    cmd.Parameters.AddWithValue("@keyID", 2); 
    cmd.Parameters.AddWithValue("@cnp", Session["sesiune_cnp"]); 
    cmd.Parameters.AddWithValue("@raspuns", textbox2.Text); 
    cmd.Parameters.AddWithValue("@data", DateTime.Now.ToLocalTime()); 
    cmd.Parameters.AddWithValue("@ip", ip); 
    cmd.Parameters.AddWithValue("@idsesiune", id_sesiune); 
    con.Open(); 
    cmd.ExecuteNonQuery(); 
    Response.Redirect("User3.aspx"); 
} 

catch (Exception ex) 
{ 
    Console.WriteLine("Error:" + ex); 
} 
finally 
{ 
    con.Close(); 
} 

當然，我在這裏做了很多假設，在你的桌子上，列類型和長度。
但是，這將容易適應。現在，如果您從VS或SSMS運行存儲過程，則可以排除數據訪問代碼中的錯誤。