將數據插入本地數據庫在控制檯應用程序

Question

這裏使用ado.net是我自己寫了那麼far.There也不例外，所以我假定連接工作正常，但沒有數據被插入到數據庫表。請告訴我什麼是錯我的代碼

SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MyETL.Properties.Settings.connectionStr"].ConnectionString); 
      try 
      { 
       conn.Open(); 
       // foreach (student stu in stulist) 
       // { 
       string strQuery = "INSERT INTO Student(Sid,st_name) VALUES (@id,@name)"; 
       SqlCommand cmd = new SqlCommand(strQuery, conn); 
       cmd.Connection = conn; 
       cmd.Parameters.AddWithValue("@id", "111"); 
       cmd.Parameters.AddWithValue("@name", "nallia"); 


       cmd.ExecuteNonQuery(); 
      } 
      catch 
      { 

       conn.Close(); 
      } 

Answer 1

試試這個

static void Insert() 
    { 
     try 
     { 
      string connectionString =System.Configuration.ConfigurationManager.ConnectionStrings["MyETL.Properties.Settings.connectionStr"].ConnectionString; 
      using (SqlConnection conn =new SqlConnection(connectionString)) 
      { 
       conn.Open(); 
       using (SqlCommand cmd = new SqlCommand("INSERT INTO Student(Sid,st_name) VALUES (" + 
         "@id,@name)", conn)) 
       { 
        cmd.Parameters.AddWithValue("@Id", 111); 
        cmd.Parameters.AddWithValue("@Name", "nallia"); 


        int rows = cmd.ExecuteNonQuery(); 

        //rows number of record got inserted 
       } 
      } 
     } 
     catch (SqlException ex) 
     { 
      //Log exception 
      //Display Error message 
     } 
    }