DbProviderFactory、DbConnection、DbCommand及DbDataAdapter 使用示例

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Text;
 4 using System.Data.Common;
 5 using System.Configuration;
 6 using System.Data;
 7 
 8 namespace ECS.TestProject
 9 {
10     class Program
11     {
12         static void Main(string[] args)
13         {
14             ConnectionStringSettings settings = ConfigurationManager.ConnectionStrings["DB"];
15 
16             DbProviderFactory provider = DbProviderFactories.GetFactory(settings.ProviderName);
17 
18             using (DbConnection conn = provider.CreateConnection())
19             {
20                 conn.ConnectionString = settings.ConnectionString;
21                 conn.Open();
22                 DbCommand cmd = conn.CreateCommand();
23 
24                 cmd.CommandText = "Select top 10 * From ShortTermBill";
25 
26                 DbDataAdapter da = provider.CreateDataAdapter();
27 
28                 da.SelectCommand = cmd;
29 
30                 DataSet ds = new DataSet();
31 
32                 da.Fill(ds);
33 
34                 da.Dispose();
35 
36                 Console.WriteLine(ds.Tables[0].Rows[0]["BillCode"]);
37             }
38         }
39     }
40 }