C#.NET 建立Web Services实例-(DataSet)

 1 using System;
 2 using System.Web;
 3 using System.Web.Services;
 4 using System.Web.Services.Protocols;
 5 using System.Data.OleDb;
 6 using System.Data;
 7 using System.IO;
 8
 9
10 [WebService(Namespace = "http://tempuri.org/")]
11 [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
12 public class Service : System.Web.Services.WebService
13 {
14     public Service () {
15
16         //如果使用设计的组件，请取消注释以下行
17         //InitializeComponent();
18     }
19
20     //[WebMethod]
21     //public string HelloWorld() {
22     //    return "Hello World";
23     //}
24
25     [WebMethod]
26     public DataSet strSQL()
27     {
28         OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; data source=F:\\zjq\\webserver\\webs\\data.mdb");
29         OleDbCommand cmd = new OleDbCommand("select * from usesr", con);
30         con.Open();
31         OleDbDataReader sdr = cmd.ExecuteReader();
32         //
33         DataTable table = new DataTable("table1");
34         table.Columns.Add("uses");
35         table.Columns.Add("pws");
36         //
37         while (sdr.Read())
38         {
39            table.Rows.Add(new string[2] {sdr.GetString(0),sdr.GetString(1) });
40         }
41         //
42         DataSet dataset = new DataSet("DataSet1");
43         dataset.Tables.Add(table);
44         return dataset;
45     }
46
47     //
48     [WebMethod]
49     public string strSQL2()
50     {
51         OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; data source=F:\\zjq\\webserver\\webs\\data.mdb");
52         OleDbCommand cmd = new OleDbCommand("select * from usesr", con);
53         con.Open();
54         OleDbDataReader sdr = cmd.ExecuteReader();
55         //
56         DataTable table = new DataTable("table1");
57         table.Columns.Add("uses");
58         table.Columns.Add("pws");
59         //
60         while (sdr.Read())
61         {
62             table.Rows.Add(new string[2] { sdr.GetString(0), sdr.GetString(1) });
63         }
64         //
65         DataSet dataset = new DataSet("DataSet1");
66         dataset.Tables.Add(table);
67         //
68         System.Text.StringBuilder strbuilder = new System.Text.StringBuilder();
69         StringWriter writer = new StringWriter(strbuilder);
70         dataset.WriteXml(writer, System.Data.XmlWriteMode.IgnoreSchema);
71
72         return strbuilder.ToString();
73
74     }
75
76 }