分享一个简单的简单的SQLHelper类

分享一个简单的简单的SQLHelper类，代码如下：

 1 class SqlHelper
 2     {
 3         public static readonly string connstr =
 4             ConfigurationManager.ConnectionStrings["dbConnStr"].ConnectionString;
 5
 6         public static int ExecuteNonQuery(string cmdText,
 7             params SqlParameter[] parameters)
 8         {
 9             using (SqlConnection conn = new SqlConnection(connstr))
10             {
11                 conn.Open();
12                 using (SqlCommand cmd = conn.CreateCommand())
13                 {
14                     cmd.CommandText = cmdText;
15                     cmd.Parameters.AddRange(parameters);
16                     return cmd.ExecuteNonQuery();
17                 }
18             }
19         }
20
21         public static object ExecuteScalar(string cmdText,
22             params SqlParameter[] parameters)
23         {
24             using (SqlConnection conn = new SqlConnection(connstr))
25             {
26                 conn.Open();
27                 using (SqlCommand cmd = conn.CreateCommand())
28                 {
29                     cmd.CommandText = cmdText;
30                     cmd.Parameters.AddRange(parameters);
31                     return cmd.ExecuteScalar();
32                 }
33             }
34         }
35
36         public static DataTable ExecuteDataTable(string cmdText,
37             params SqlParameter[] parameters)
38         {
39             using (SqlConnection conn = new SqlConnection(connstr))
40             {
41                 conn.Open();
42                 using (SqlCommand cmd = conn.CreateCommand())
43                 {
44                     cmd.CommandText = cmdText;
45                     cmd.Parameters.AddRange(parameters);
46                     using (SqlDataAdapter adapter = new SqlDataAdapter(cmd))
47                     {
48                         DataTable dt = new DataTable();
49                         adapter.Fill(dt);
50                         return dt;
51                     }
52                 }
53             }
54         }
55
56         public static SqlDataReader ExecuteDataReader(string cmdText,
57             params SqlParameter[] parameters)
58         {
59             SqlConnection conn = new SqlConnection(connstr);
60             conn.Open();
61             using (SqlCommand cmd = conn.CreateCommand())
62             {
63                 cmd.CommandText = cmdText;
64                 cmd.Parameters.AddRange(parameters);
65                 return cmd.ExecuteReader(CommandBehavior.CloseConnection);
66             }
67         }
68
69         public static int ExecuteStoredProcedure(string procName,
70             params SqlParameter[] parameters)
71         {
72             SqlConnection conn = new SqlConnection(connstr);
73             conn.Open();
74             using (SqlCommand cmd = conn.CreateCommand())
75             {
76                 cmd.CommandText = procName;
77                 cmd.CommandType = CommandType.StoredProcedure;
78                 cmd.Parameters.AddRange(parameters);
79                 return cmd.ExecuteNonQuery();
80             }
81         }
82     }