VisualStudio2010中创建ASP.Net WebService

相关资料：http://blog.csdn.net/yapingxin/article/details/7331375

具体操作：
1.打开“Microsoft Visual Studio 2010”->“文件”->“新建”->“项目”->“已安装的模板”－>“其他语言”->“Visual C#”->“Web”->“ASP.NET 空Web应用程序”。
2.“解决方案”->“MyDataService”工程右击->“增加”->“新建项”->“已安装的模版”->“Visual C#”->“Web”->“Web 服务”。

实例代码：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Web.Services;
 6 using System.Web.Services.Protocols;
 7 using System.Data.OleDb;
 8 using System.Data;
 9 using System.IO;
10 
11 namespace MyDataService
12 {
13     /// <summary>
14     /// WebService1 的摘要说明
15     /// </summary>
16     [WebService(Namespace = "http://tempuri.org/")]
17     [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
18     [System.ComponentModel.ToolboxItem(false)]
19     // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
20     // [System.Web.Script.Services.ScriptService]
21     public class WebService1 : System.Web.Services.WebService
22     {
23 
24         [WebMethod]
25         public string HelloWorld()
26         {
27             return "Hello World";
28         }
29 
30          [WebMethod]  
31         public int Add(int x, int y)  
32        {  
33             return x + y;  
34         } 
35 
36         [WebMethod]
37         public DataSet SelectSQL()
38         {
39             OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; data source=E:\MyData.mdb");
40             OleDbCommand cmd = new OleDbCommand("select * from usesr", con);
41             OleDbDataAdapter oda = new OleDbDataAdapter();
42             DataSet ds = new DataSet();
43             DataTable dta = new DataTable();
44             con.Open();
45             oda = new OleDbDataAdapter(cmd);
46             oda.Fill(ds, "usesr");
47             return ds;
48         }
49 
50         //
51         [WebMethod]
52         public string SelectSQL2()
53         {
54             OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; data source=E:\MyData.mdb");
55             OleDbCommand cmd = new OleDbCommand("select * from usesr", con);
56             OleDbDataAdapter oda = new OleDbDataAdapter();
57             DataSet ds = new DataSet();
58             DataTable dta = new DataTable();
59             con.Open();
60             oda = new OleDbDataAdapter(cmd);
61             oda.Fill(ds, "usesr");
62             //
63             System.Text.StringBuilder strbuilder = new System.Text.StringBuilder();
64             StringWriter writer = new StringWriter(strbuilder);
65             ds.WriteXml(writer, System.Data.XmlWriteMode.IgnoreSchema);
66 
67             return strbuilder.ToString();
68 
69         }
70         [WebMethod]
71         public string ExecSQL(string ASQL)
72         {
73             OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; data source=E:\MyData.mdb");
74             OleDbCommand cmd = new OleDbCommand(ASQL, con);
75             con.Open();            
76             //
77             int num = Convert.ToInt32(cmd.ExecuteNonQuery());
78             if (num > 0)
79             {
80                 string Astr;
81                 Astr = "成功";
82                 return Astr;
83             }
84             else
85             {
86                 string Astr;
87                 Astr = "失败";
88                 return Astr;
89             }     
90         }
91     }
92 }

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原文地址：https://www.cnblogs.com/FKdelphi/p/4633838.html