把MySqlXXX的類更改為SqlXXX就可以成為sqlHelper.
另外C#也提供了MysqlHelper和sqlHelper，用起來也挺方便的。
1 public class MySqlHelper
2 {
3 private static readonly string connstr = ConfigurationManager.ConnectionStrings["connstr"].ConnectionString;
4 public MySqlConnection CreateConnection()
5 {
6 MySqlConnection conn = new MySqlConnection(connstr);
7 conn.Open();
8 return conn;
9 }
10 public int ExecuteNonQuery(string sql,params MySqlParameter[]parameters)
11 {
12 using (MySqlConnection conn=CreateConnection())
13 using(MySqlCommand cmd=conn.CreateCommand())
14 {
15 cmd.CommandText = sql;
16 cmd.Parameters.AddRange(parameters);
17 return cmd.ExecuteNonQuery();
18 }
19 }
20 public object ExecuteScalar(string sql,params MySqlParameter[]parameters)
21 {
22 using (MySqlConnection conn=CreateConnection())
23 using (MySqlCommand cmd=conn.CreateCommand())
24 {
25 cmd.CommandText = sql;
26 cmd.Parameters.AddRange(parameters);
27 return cmd.ExecuteScalar();
28 }
29
30 }
31
32 public MySqlDataReader ExecuteReader(string sql,params MySqlParameter[]ps)
33 {
34 using (MySqlConnection conn=CreateConnection())
35 using(MySqlCommand cmd=conn.CreateCommand())
36 {
37 cmd.CommandText = sql;
38 if (ps!=null)
39 {
40 cmd.Parameters.AddRange(ps);
41 }
42 return cmd.ExecuteReader();
43 }
44 }
45 public DataTable ExecuteDataTable(string sql,params MySqlParameter[]ps)
46 {
47 DataTable table = new DataTable();
48 using (MySqlConnection conn=CreateConnection())
49 using(MySqlCommand cmd=conn.CreateCommand())
50 {
51 cmd.CommandText = sql;
52 if (ps!=null)
53 {
54 cmd.Parameters.AddRange(ps);
55 }
56 using ( MySqlDataAdapter adapter = new MySqlDataAdapter(cmd))
57 {
58 adapter.Fill(table);
59 }
60 return table;
61 }
62 }
63 }
