嘿嘿，今晚无聊写了个MSSQL操作类，算是C#征途的一个起步，博客园的各位朋友尽量拍砖！我的进步靠大家，希望大家不吝赐教！！
2 {
3 private string connectString;
4
5 public MsSql(string connString)
6 {
7 connectString = connString;
8 }
9
10 /// <summary>
11 /// 查询数据库，并返回DataSet集
12 /// </summary>
13 /// <param name="cmdString">查询语句</param>
14 /// <returns>返回DataSet</returns>
15 public DataSet GetDataSet(string cmdString)
16 {
17 SqlConnection sqlConn = new SqlConnection(connectString);
18
19 SqlDataAdapter da = new SqlDataAdapter(cmdString, sqlConn);
20 DataSet ds = new DataSet();
21 try
22 {
23 sqlConn.Open();
24
25 da.Fill(ds);
26 //if (ds != null || ds.Tables.Count > 0)
27 }
28 catch (SqlException sqlex)
29 {
30 Console.WriteLine(sqlex.Message);
31 }
32 sqlConn.Close();
33 return ds;
34 }
35
36 /// <summary>
37 /// 取得表
38 /// </summary>
39 /// <param name="cmdString">查询字符串</param>
40 /// <returns>DataTable</returns>
41 public DataTable GetDataTable(string cmdString)
42 {
43 SqlConnection sqlConn = new SqlConnection(connectString);
44
45 SqlDataAdapter da = new SqlDataAdapter(cmdString, sqlConn);
46 DataSet ds = new DataSet();
47 try
48 {
49 sqlConn.Open();
50 da.Fill(ds);
51 }
52 catch (SqlException sqlex)
53 {
54 Console.WriteLine(sqlex.Message);
55 }
56 DataTable MyDataTable = ds.Tables[0];
57 sqlConn.Close();
58 return MyDataTable;
59 }
60
61 /// <summary>
62 /// 执行sql语句
63 /// </summary>
64 /// <param name="cmdString">查询，更新，删除语句</param>
65 /// <returns>成功返回true,失败返回false</returns>
66 public bool ExecuteQuery(string cmdString)
67 {
68 SqlConnection conn = new SqlConnection(connectString);
69
70 SqlCommand cmd = new SqlCommand(cmdString,conn);
71 cmd.CommandText = cmdString;
72 try
73 {
74 conn.Open();
75
76 if (cmd.ExecuteNonQuery() > 0)
77 {
78 conn.Close();
79 return true;
80 }
81 else
82 {
83 return false;
84 }
85 }
86 catch (SqlException Sqlex)
87 {
88 Console.WriteLine(Sqlex.Message);
89 return false;
90 }
91 }
来源：https://www.cnblogs.com/coolkiss/archive/2008/09/20/1294546.html