我怎樣才能將數據從sql導入到c＃

Question

嗨，大家好，我正在開發一個項目。我的項目將c＃中的課程名稱，學分和成績保存到sql中。這是好的。我處理它，但我無法將數據傳輸到計算機的平均等級上。我想array.could你幫我請

Answer 1

試試這個

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Data; 
using System.Data.SqlClient; 

namespace ConsoleApplication1 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 

      string connStr = "Enter your conneciton string here"; 
      string SQL = "Enter your SQL here"; 

      //uncomment lines below 
      //SqlDataAdapter adapter = new SqlDataAdapter(SQL, connStr); 
      //DataTable dt = new DataTable(); 
      //adapter.Fill(dt); 

      //simulated table 
      DataTable dt = new DataTable(); 
      dt.Columns.Add("Name", typeof(string)); 
      dt.Columns.Add("Age", typeof(int)); 
      dt.Columns.Add("City", typeof(string)); 

      dt.Rows.Add(new object[] { "John", 22, "NY" }); 
      dt.Rows.Add(new object[] { "Mary", 27, "Boston" }); 
      dt.Rows.Add(new object[] { "Paul", 18, "Chicago" }); 


      int count = 0; 
      foreach (DataRow row in dt.AsEnumerable()) 
      { 
       Console.WriteLine("Row {0} : {1}", (count++).ToString(), string.Join(",", row.ItemArray.Select(x => x.ToString()).ToArray())); 
      } 
      Console.ReadLine(); 

     } 
    } 
}